Acetylcholinesterase

Primary cholinesterase in the body

"ACHE" redirects here. For other uses, see Ache.

Not to be confused with Cholinesterase or Choline acetyltransferase.

acetylcholinesterase

Acetylcholinesterase catalyzes the hydrolysis of acetylcholine to acetate ion and choline

Identifiers
EC no.| 3.1.1.7
CAS no.| 9000-81-1
Databases
IntEnz| IntEnz view
BRENDA| BRENDA entry
ExPASy| NiceZyme view
KEGG| KEGG entry
MetaCyc| metabolic pathway
PRIAM| profile
PDB structures| RCSB PDB PDBe PDBsum
Gene Ontology| AmiGO  / QuickGO
| Search

PMC| articles
PubMed| articles
NCBI| proteins
ACHE

| Available structures

PDB| Ortholog search: PDBe RCSB
| List of PDB id codes

4EY7, 4PQE, 1F8U, 3LII, 4BDT, 4M0E, 4M0F, 1VZJ, 2X8B, 1B41, 4EY4, 4EY5, 4EY6, 4EY8, 5FOQ, 5HF9, 5HF6, 5FPQ, 5HF8, 5HFA

Identifiers
Aliases| ACHE, AChE, acetylhydrolase, acetylcholinesterase (Yt blood group), ACEE, ARN-YT, acetylcholinesterase (Cartwright blood group), true cholinesterase (dated synonym)
External IDs| OMIM: 100740; MGI: 87876; HomoloGene: 543; GeneCards: ACHE; OMA:ACHE - orthologs
| Gene location (Human)

Chr.| Chromosome 7 (human)[1]

Band| 7q22.1| Start| 100,889,994 bp[1]
End| 100,896,974 bp[1]
| Gene location (Mouse)

Chr.| Chromosome 5 (mouse)[2]

Band| 5 G2|5 76.32 cM| Start| 137,285,781 bp[2]
End| 137,292,728 bp[2]
| RNA expression pattern

Bgee| | Human| Mouse (ortholog)

|

| Top expressed in

* muscle of thigh

* right hemisphere of cerebellum

* hypothalamus

* gastrocnemius muscle

* nucleus accumbens

* triceps brachii muscle

* Skeletal muscle tissue of rectus abdominis

* right frontal lobe

* putamen

* caudate nucleus

| Top expressed in

* medulla oblongata

* pons

* central gray substance of midbrain

* bone marrow

* superior colliculus

* hypothalamus

* cerebellar cortex

* striatum of neuraxis

* nucleus of stria terminalis

* inferior colliculus

More reference expression data
BioGPS| |

More reference expression data
| Gene ontology

Molecular function|

* protein homodimerization activity
* collagen binding
* acetylcholine binding
* serine hydrolase activity
* carboxylic ester hydrolase activity
* amyloid-beta binding
* cholinesterase activity
* protein self-association
* protein binding
* laminin binding
* hydrolase activity
* ACHE
* acetylcholinesterase activity

Cellular component|

* Golgi apparatus
* membrane
* plasma membrane
* synapse
* extracellular region
* cell surface
* cell junction
* perinuclear region of cytoplasm
* anchored component of membrane
* nucleus
* synaptic cleft
* extracellular space
* neuromuscular junction
* basement membrane

Biological process|

* muscle organ development
* receptor internalization
* neurotransmitter biosynthetic process
* negative regulation of synaptic transmission, cholinergic
* amyloid precursor protein metabolic process
* protein tetramerization
* acetylcholine catabolic process
* nervous system development
* neurotransmitter catabolic process
* DNA replication
* cell adhesion
* retina development in camera-type eye
* response to wounding
* positive regulation of protein secretion
* osteoblast development
* synapse assembly
* phosphatidylcholine biosynthetic process
* regulation of receptor recycling
* cell population proliferation
* acetylcholine catabolic process in synaptic cleft
* positive regulation of cold-induced thermogenesis

Sources:Amigo / QuickGO
| Orthologs

Species| Human| Mouse
Entrez| |

11423

Ensembl| |

ENSG00000087085

ENSMUSG00000023328

UniProt| |

P22303

P21836

RefSeq (mRNA)| | NM_000665
NM_001282449
NM_001302621
NM_001302622
NM_015831

NM_001367915
NM_001367917
NM_001367918
NM_001367919

NM_001290010
NM_009599

RefSeq (protein)| | NP_000656
NP_001269378
NP_001289550
NP_001289551
NP_001354844

NP_001354846
NP_001354847
NP_001354848

NP_001276939
NP_033729

Location (UCSC)| Chr 7: 100.89 – 100.9 Mb| Chr 5: 137.29 – 137.29 Mb
PubMed search| [3]| [4]
Wikidata
| View/Edit Human| View/Edit Mouse

|

Acetylcholinesterase (HGNC symbol ACHE; EC 3.1.1.7; systematic name acetylcholine acetylhydrolase), also known as AChE, AChase or acetylhydrolase, is the primary cholinesterase in the body. It is an enzyme that catalyzes the breakdown of acetylcholine and some other choline esters that function as neurotransmitters:

acetylcholine + H2O = choline + acetate

It is found at mainly neuromuscular junctions and in chemical synapses of the cholinergic type, where its activity serves to terminate synaptic transmission. It belongs to the carboxylesterase family of enzymes. It is the primary target of inhibition by organophosphorus compounds such as nerve agents and pesticides.

## Enzyme structure and mechanism

[edit]

AChe mechanism of action[5]

AChE is a hydrolase that hydrolyzes choline esters. It has a very high catalytic activity—each molecule of AChE degrades about 5,000 molecules of acetylcholine (ACh) per second,[6] approaching the limit allowed by diffusion of the substrate.[7][8] The active site of AChE comprises two subsites—the anionic site and the esteratic subsite. The structure and mechanism of action of AChE have been elucidated from the crystal structure of the enzyme.[9][10]

The anionic subsite accommodates the positive quaternary amine of acetylcholine as well as other cationic substrates and inhibitors. The cationic substrates are not bound by a negatively charged amino acid in the anionic site, but by interaction of 14 aromatic residues that line a gorge leading to the active site.[11][12][13] All 14 amino acids in the aromatic gorge are highly conserved across different species.[14] Among the aromatic amino acids, tryptophan 84 is critical and its substitution with alanine results in a 3000-fold decrease in reactivity.[15] The gorge is approximately 20 angstroms deep and five angstroms wide.[16]

The esteratic subsite, where acetylcholine is hydrolyzed to acetate and choline, contains the catalytic triad of three amino acids: serine 203, histidine 447 and glutamate 334\. These three amino acids are similar to the triad in other serine proteases except that the glutamate is the third member rather than aspartate. Moreover, the triad is of opposite chirality to that of other proteases.[17] The hydrolysis reaction of the carboxyl ester leads to the formation of an acyl-enzyme and free choline. Then, the acyl-enzyme undergoes nucleophilic attack by a water molecule, assisted by the histidine 440 group, liberating acetic acid and regenerating the free enzyme.[18][19]

## Species

[edit]

AChE is found in many biological species, including humans and other mammals, non-vertebrates, and plants.[20][21][22][23]

In humans, AChE is a cholinergic enzyme involved in the hydrolysis of the neurotransmitter acetylcholine (ACh) into its constituents, choline, and acetate.[20] Overall, in mammals, AChE is primarily involved in the termination of impulse transmission at cholinergic synapses by rapid hydrolysis of the neurotransmitter acetylcholine.[20] In non-vertebrates, AChE plays a similar role in nerve conduction processes at the neuromuscular junction. It is usually located in the membranes of these animals and controls ionic currents in excitable membranes.[22][23]

In plants, the biological functions of AChE are less clear, and its existence has been recognized by indirect evidence of its activity. For instance, a study on Solanum lycopersicum (tomato) identified 87 SlAChE genes containing GDSL lipase/acylhydrolase domain. The study also showed up-and down-regulation of SlAChE genes under salinity stress condition.[20]

Some marine fungi have been found to produce compounds that inhibit AChE. However, the specific role and mechanisms of AChE in fungi are not as well-studied as in mammals.[23] The presence and role of AChE in bacteria is not well-documented.[23]

## Biological function

[edit]

During neurotransmission, ACh is released from the presynaptic neuron into the synaptic cleft and binds to ACh receptors on the post-synaptic membrane, relaying the signal from the nerve. AChE is concentrated in the synaptic cleft, where it terminates the signal transmission by hydrolyzing ACh.[6] The liberated choline is taken up again by the pre-synaptic neuron and ACh is synthesized by combining with acetyl-CoA through the action of choline acetyltransferase.[24][25]

A cholinomimetic drug disrupts this process by acting as a cholinergic neurotransmitter that is impervious to acetylcholinesterase's lysing action.[citation needed]

## Disease relevance

[edit]

Main article: Acetylcholinesterase inhibitor

Drugs or toxins that inhibit AChE lead to persistence of high concentrations of ACh within synapses, leading to increased cholinergic signaling within the central nervous system, autonomic ganglia and neuromuscular junctions.[26]

Mechanism of Inhibitors of AChE

Irreversible inhibitors of AChE may lead to muscular paralysis, convulsions, bronchial constriction, and death by asphyxiation. Organophosphates (OP), esters of phosphoric acid, are a class of irreversible AChE inhibitors.[27] Cleavage of OP by AChE leaves a phosphoryl group in the esteratic site, which is slow to be hydrolyzed (on the order of days) and can become covalently bound. Irreversible AChE inhibitors have been used in insecticides (e.g., malathion) and nerve gases for chemical warfare (e.g., Sarin and VX). Carbamates, esters of N-methyl carbamic acid, are AChE inhibitors that hydrolyze in hours and have been used for medical purposes (e.g., physostigmine for the treatment of glaucoma). Reversible inhibitors occupy the esteratic site for short periods of time (seconds to minutes) and are used to treat of a range of central nervous system diseases. Tetrahydroaminoacridine (THA) and donepezil are FDA-approved to improve cognitive function in Alzheimer's disease. Rivastigmine is also used to treat Alzheimer's and Lewy body dementia, and pyridostigmine bromide is used to treat myasthenia gravis.[28][29][30][31][32][33]

An endogenous inhibitor of AChE in neurons is Mir-132 microRNA, which may limit inflammation in the brain by silencing the expression of this protein and allowing ACh to act in an anti-inflammatory capacity.[34]

It has also been shown that the main active ingredient in cannabis, tetrahydrocannabinol, is a competitive inhibitor of acetylcholinesterase.[35]

## Distribution

[edit]

AChE is found in many types of conducting tissue: nerve and muscle, central and peripheral tissues, motor and sensory fibers, and cholinergic and noncholinergic fibers. The activity of AChE is higher in motor neurons than in sensory neurons.[36][37][38]

Acetylcholinesterase is also found on the red blood cell membranes, where different forms constitute the Yt blood group antigens.[39] Acetylcholinesterase exists in multiple molecular forms, which possess similar catalytic properties, but differ in their oligomeric assembly and mode of attachment to the cell surface.[citation needed]

## AChE gene

[edit]

In mammals, acetylcholinesterase is encoded by a single AChE gene while some invertebrates have multiple acetylcholinesterase genes. Note higher vertebrates also encode a closely related paralog BCHE (butyrylcholinesterase) with 50% amino acid identity to ACHE.[40] Diversity in the transcribed products from the sole mammalian gene arises from alternative mRNA splicing and post-translational associations of catalytic and structural subunits. There are three known forms: T (tail), R (read through), and H (hydrophobic).[41]

### AChET

[edit]

The major form of acetylcholinesterase found in brain, muscle, and other tissues, known as is the hydrophilic species, which forms disulfide-linked oligomers with collagenous, or lipid-containing structural subunits. In the neuromuscular junctions AChE expresses in asymmetric form which associates with ColQ or subunit. In the central nervous system it is associated with PRiMA which stands for Proline Rich Membrane anchor to form symmetric form. In either case, the ColQ or PRiMA anchor serves to maintain the enzyme in the intercellular junction, ColQ for the neuromuscular junction and PRiMA for synapses.

### AChEH

[edit]

The other, alternatively spliced form expressed primarily in the erythroid tissues, differs at the C-terminus, and contains a cleavable hydrophobic peptide with a PI-anchor site. It associates with membranes through the phosphoinositide (PI) moieties added post-translationally.[42]

### AChER

[edit]

The third type has, so far, only been found in Torpedo sp. and mice although it is hypothesized in other species. It is thought to be involved in the stress response and, possibly, inflammation.[43]

## Nomenclature

[edit]

The nomenclatural variations of ACHE and of cholinesterases generally are discussed at Cholinesterase § Types and nomenclature.

## Inhibitors

[edit]

Main article: Acetylcholinesterase inhibitor

For acetylcholine esterase (AChE), reversible inhibitors are those that do not irreversibly bond to and deactivate AChE.[44] Drugs that reversibly inhibit acetylcholine esterase are being explored as treatments for Alzheimer's disease and myasthenia gravis, among others. Examples include tacrine and donepezil.[45]

Exposure to acetylcholinesterase inhibitors is one of several studied explanations for the chronic cognitive symptoms veterans displayed after returning from the Gulf War. Soldiers were dosed with AChEI pyridostigmine bromide (PB) as protection from nerve agent weapons. Studying acetylcholine levels using microdialysis and HPLC-ECD, researchers at the University of South Carolina School of Medicine determined PB, when combined with a stress element can lead to cognitive responses.[46]

* Phytocannabinoids[47]
* Cannabidiol
* Δ8-Tetrahydrocannabinol
* Cannabigerol
* Cannabigerolic acid
* Cannabicitran
* Cannabidivarin
* Cannabichromene
* Cannabinol

## See also

[edit]

* Cholinesterases

## References

[edit]

1. ^ a b c GRCh38: Ensembl release 89: ENSG00000087085 - Ensembl, May 2017
2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000023328 - Ensembl, May 2017
3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
5. ^ Katzung BG (2001). "Introduction to Autonomic Pharmacology". Basic and Clinical Pharmacology (8th ed.). McGraw-Hill. pp. 75–91. ISBN 978-0-07-160405-5.
6. ^ a b Purves D, Augustine GJ, Fitzpatrick D, Katz LC, LaMantia AS, McNamara JO, et al. (2001). "Chapter 6. Neurotransmitters: Acetylcholine". Neuroscience (2nd ed.). Sunderland (MA): Sinauer Associates. ISBN 978-0-87893-697-7.
7. ^ Quinn DM (1987). "Acetylcholinesterase: enzyme structure, reaction dynamics, and virtual transition states". Chemical Reviews. 87 (5): 955–79. doi:10.1021/cr00081a005.
8. ^ Taylor P, Radić Z (1994). "The cholinesterases: from genes to proteins". Annual Review of Pharmacology and Toxicology. 34: 281–320. doi:10.1146/annurev.pa.34.040194.001433. PMID 8042853.
9. ^ Sussman JL, Harel M, Frolow F, Oefner C, Goldman A, Toker L, et al. (August 1991). "Atomic structure of acetylcholinesterase from Torpedo californica: a prototypic acetylcholine-binding protein". Science. 253 (5022): 872–9. Bibcode:1991Sci...253..872S. doi:10.1126/science.1678899. PMID 1678899. S2CID 28833513.
10. ^ Sussman JL, Harel M, Silman I (June 1993). "Three-dimensional structure of acetylcholinesterase and of its complexes with anticholinesterase drugs". Chem. Biol. Interact. 87 (1–3): 187–97. Bibcode:1993CBI....87..187S. doi:10.1016/0009-2797(93)90042-W. PMID 8343975.
11. ^ Radić Z, Gibney G, Kawamoto S, MacPhee-Quigley K, Bongiorno C, Taylor P (October 1992). "Expression of recombinant acetylcholinesterase in a baculovirus system: kinetic properties of glutamate 199 mutants". Biochemistry. 31 (40): 9760–7. doi:10.1021/bi00155a032. PMID 1356436.
12. ^ Ordentlich A, Barak D, Kronman C, Ariel N, Segall Y, Velan B, et al. (February 1995). "Contribution of aromatic moieties of tyrosine 133 and of the anionic subsite tryptophan 86 to catalytic efficiency and allosteric modulation of acetylcholinesterase". J. Biol. Chem. 270 (5): 2082–91. doi:10.1074/jbc.270.5.2082. PMID 7836436.
13. ^ Ariel N, Ordentlich A, Barak D, Bino T, Velan B, Shafferman A (October 1998). "The 'aromatic patch' of three proximal residues in the human acetylcholinesterase active centre allows for versatile interaction modes with inhibitors". Biochem. J. 335 (1): 95–102. doi:10.1042/bj3350095. PMC 1219756. PMID 9742217.
14. ^ Ordentlich A, Barak D, Kronman C, Flashner Y, Leitner M, Segall Y, et al. (August 1993). "Dissection of the human acetylcholinesterase active center determinants of substrate specificity. Identification of residues constituting the anionic site, the hydrophobic site, and the acyl pocket". J. Biol. Chem. 268 (23): 17083–95. doi:10.1016/S0021-9258(19)85305-X. PMID 8349597.
15. ^ Tougu V (2001). "Acetylcholinesterase: Mechanism of Catalysis and Inhibition". Current Medicinal Chemistry - Central Nervous System Agents. 1 (2): 155–170. doi:10.2174/1568015013358536.
16. ^ Cheng S, Song W, Yuan X, Xu Y (2017). "Gorge Motions of Acetylcholinesterase Revealed by Microsecond Molecular Dynamics Simulations". Scientific Reports. 7 (1): 3219. Bibcode:2017NatSR...7.3219C. doi:10.1038/s41598-017-03088-y. PMC 5468367. PMID 28607438.
17. ^ Tripathi A (October 2008). "Acetylcholinsterase: A Versatile Enzyme of Nervous System". Annals of Neurosciences. 15 (4): 106–111. doi:10.5214/ans.0972.7531.2008.150403.
18. ^ Pauling L (1946). "Molecular Architecture and Biological Reactions" (PDF). Chemical & Engineering News. 24 (10): 1375–1377. doi:10.1021/cen-v024n010.p1375.
19. ^ Fersht A (1985). Enzyme structure and mechanism. San Francisco: W.H. Freeman. p. 14\. ISBN 0-7167-1614-3.
20. ^ a b c d Sarangle Y, Bamel K, Purty RS (2023). "Identification of Acetylcholinesterase Like Gene Family and Its Expression Under Salinity Stress in Solanum lycopersicum". Journal of Plant Growth Regulation. 43 (3): 940–960. doi:10.1007/s00344-023-11152-3. S2CID 265016505.
21. ^ Tripathi A, Srivastava UC (January 2, 2010). "Acetylcholinesterase :A Versatile Enzyme of Nervous System". Annals of Neurosciences. 15 (4): 106–111. doi:10.5214/ans.0972.7531.2008.150403.
22. ^ a b Gaitonde D, Sarkar A, Kaisary S, Silva CD, Dias C, Rao DP, et al. (2006). "Acetylcholinesterase activities in marine snail (Cronia contracta) as a biomarker of neurotoxic contaminants along the Goa coast, West coast of India". Ecotoxicology. 15 (4): 353–358. Bibcode:2006Ecotx..15..353G. doi:10.1007/s10646-006-0075-3. PMID 16676216. S2CID 25702252.
23. ^ a b c d Nie Y, Yang W, Liu Y, Yang J, Lei X, Gerwick WH, et al. (2020). "Acetylcholinesterase inhibitors and antioxidants mining from marine fungi: Bioassays, bioactivity coupled LC–MS/MS analyses and molecular networking". Marine Life Science & Technology. 2 (4): 386–397. Bibcode:2020MLST....2..386N. doi:10.1007/s42995-020-00065-9.
24. ^ Whittaker VP (1990). "The Contribution of Drugs and Toxins to Understanding of Cholinergic Function" (PDF). Trends in Pharmacological Sciences. 11 (1): 8–13. doi:10.1016/0165-6147(90)90034-6. hdl:11858/00-001M-0000-0013-0E8C-5. PMID 2408211.
25. ^ Purves D, Augustine GJ, Fitzpatrick D, Hall WC, LaMantia AS, McNamara JO, et al. (2008). Neuroscience (4th ed.). Sinauer Associates. pp. 121–122. ISBN 978-0-87893-697-7.
26. ^ English BA, Webster AA (2012). "Acetylcholinesterase and its Inhibitors". Primer on the Autonomic Nervous System. Elsevier. pp. 631–633. doi:10.1016/b978-0-12-386525-0.00132-3. ISBN 978-0-12-386525-0.
27. ^ "National Pesticide Information Center-Diazinon Technical Fact Sheet" (PDF). Retrieved February 24, 2012.
28. ^ "Clinical Application: Acetylcholine and Alzheimer's Disease". Retrieved February 24, 2012.
29. ^ Stoelting RK (1999). Anticholinesterase Drugs and Cholinergic Agonists", in Pharmacology and Physiology in Anesthetic Practice. Lippincott-Raven. ISBN 978-0-7817-5469-9. Archived from the original on March 3, 2016. Retrieved February 26, 2012.
30. ^ Taylor P, Hardman JG, Limbird LE, Molinoff PB, Ruddon RW, Gilman AG (1996). "5: Autonomic Pharmacology: Cholinergic Drugs". The Pharmacologial Basis of Therapeutics. THe McGraw-Hill Companies. pp. 161–174. ISBN 978-0-07-146804-6. Archived from the original on March 4, 2016. Retrieved February 26, 2012.
31. ^ Blumenthal D, Brunton L, Goodman LS, Parker K, Gilman A, Lazo JS, et al. (1996). "5: Autonomic Pharmacology: Cholinergic Drugs". Goodman & Gilman's The pharmacological basis of therapeutics. New York: McGraw-Hill. p. 1634\. ISBN 978-0-07-146804-6.
32. ^ Drachman DB, Isselbacher KJ, Braunwald E, Wilson JD, Martin JB, Fauci AS, et al. (1998). Harrison's Principles of Internal Medicine (14 ed.). The McCraw-Hill Companies. pp. 2469–2472. ISBN 978-0-07-020291-7.
33. ^ Raffe RB (2004). Autonomic and Somatic Nervous Systems in Netter's Illustrated Pharmacology. Elsevier Health Science. p. 43\. ISBN 978-1-929007-60-8.
34. ^ Shaked I, Meerson A, Wolf Y, Avni R, Greenberg D, Gilboa-Geffen A, et al. (2009). "MicroRNA-132 potentiates cholinergic anti-inflammatory signaling by targeting acetylcholinesterase". Immunity. 31 (6): 965–73. doi:10.1016/j.immuni.2009.09.019. PMID 20005135.
35. ^ Eubanks LM, Rogers CJ, Beuscher AE, Koob GF, Olson AJ, Dickerson TJ, et al. (2006). "A molecular link between the active component of marijuana and Alzheimer's disease pathology". Mol. Pharm. 3 (6): 773–7. doi:10.1021/mp060066m. PMC 2562334. PMID 17140265.
36. ^ Massoulié J, Pezzementi L, Bon S, Krejci E, Vallette FM (July 1993). "Molecular and cellular biology of cholinesterases". Progress in Neurobiology. 41 (1): 31–91. doi:10.1016/0301-0082(93)90040-Y. PMID 8321908. S2CID 21601586.
37. ^ Chacko LW, Cerf JA (1960). "Histochemical localization of cholinesterase in the amphibian spinal cord and alterations following ventral root section". Journal of Anatomy. 94 (Pt 1): 74–81. PMC 1244416. PMID 13808985.
38. ^ Koelle GB (1954). "The histochemical localization of cholinesterases in the central nervous system of the rat". Journal of Comparative Neurology. 100 (1): 211–35. doi:10.1002/cne.901000108. PMID 13130712. S2CID 23021010.
39. ^ Bartels CF, Zelinski T, Lockridge O (May 1993). "Mutation at codon 322 in the human acetylcholinesterase (ACHE) gene accounts for YT blood group polymorphism". Am. J. Hum. Genet. 52 (5): 928–36. PMC 1682033. PMID 8488842.
40. ^ Johnson G, Moore SW (2012). "Why has butyrylcholinesterase been retained? Structural and functional diversification in a duplicated gene. 2012". Neurochem. Int. 16 (5): 783–797. doi:10.1016/j.neuint.2012.06.016. PMID 22750491. S2CID 39348660.
41. ^ Massoulié J, Perrier N, Noureddine H, Liang D, Bon S (2008). "Old and new questions about cholinesterases". Chem. Biol. Interact. 175 (1–3): 30–44. Bibcode:2008CBI...175...30M. doi:10.1016/j.cbi.2008.04.039. PMID 18541228.
42. ^ "Entrez Gene: ACHE acetylcholinesterase (Yt blood group)".
43. ^ Dori A, Ifergane G, Saar-Levy T, Bersudsky M, Mor I, Soreq H, et al. (2007). "Readthrough acetylcholinesterase in inflammation-associated neuropathies". Life Sci. 80 (24–25): 2369–74. doi:10.1016/j.lfs.2007.02.011. PMID 17379257.
44. ^ Millard CB, Kryger G, Ordentlich A, Greenblatt HM, Harel M, Raves ML, et al. (June 1999). "Crystal structures of aged phosphonylated acetylcholinesterase: nerve agent reaction products at the atomic level". Biochemistry. 38 (22): 7032–9. doi:10.1021/bi982678l. PMID 10353814. S2CID 11744952.
45. ^ Julien RM, Advokat CD, Comaty JE (October 12, 2007). A Primer of Drug Action (Eleventh ed.). Worth Publishers. pp. 50. ISBN 978-1-4292-0679-2.
46. ^ Macht VA, Woodruff JL, Maissy ES, Grillo CA, Wilson MA, Fadel JR, et al. (August 2019). "Pyridostigmine bromide and stress interact to impact immune function, cholinergic neurochemistry and behavior in a rat model of Gulf War Illness". Brain, Behavior, and Immunity. 80: 384–393. doi:10.1016/j.bbi.2019.04.015. PMC 6790976. PMID 30953774.
47. ^ Puopolo T, Liu C, Ma H, Seeram NP (April 19, 2022). "Inhibitory Effects of Cannabinoids on Acetylcholinesterase and Butyrylcholinesterase Enzyme Activities". Medical Cannabis and Cannabinoids. 5 (1): 85–94. doi:10.1159/000524086. PMC 9149358. PMID 35702400.

## Further reading

[edit]

* Silman I, Futerman AH (1988). "Modes of attachment of acetylcholinesterase to the surface membrane". Eur. J. Biochem. 170 (1–2): 11–22. doi:10.1111/j.1432-1033.1987.tb13662.x. PMID 3319614.
* Sussman JL, Harel M, Frolow F, Oefner C, Goldman A, Toker L, et al. (1991). "Atomic structure of acetylcholinesterase from Torpedo californica: a prototypic acetylcholine-binding protein". Science. 253 (5022): 872–9. Bibcode:1991Sci...253..872S. doi:10.1126/science.1678899. PMID 1678899. S2CID 28833513.
* Soreq H, Seidman S (2001). "Acetylcholinesterase--new roles for an old actor". Nature Reviews Neuroscience. 2 (4): 294–302. doi:10.1038/35067589. PMID 11283752. S2CID 5947744.
* Shen T, Tai K, Henchman RH, McCammon JA (2003). "Molecular dynamics of acetylcholinesterase". Acc. Chem. Res. 35 (6): 332–40. doi:10.1021/ar010025i. PMID 12069617.
* Pakaski M, Kasa P (2003). "Role of acetylcholinesterase inhibitors in the metabolism of amyloid precursor protein". Current Drug Targets. CNS and Neurological Disorders. 2 (3): 163–71. doi:10.2174/1568007033482869. PMID 12769797.
* Meshorer E, Soreq H (2006). "Virtues and woes of AChE alternative splicing in stress-related neuropathologies". Trends Neurosci. 29 (4): 216–24. doi:10.1016/j.tins.2006.02.005. PMID 16516310. S2CID 18983474.
* Ehrlich G, Viegas-Pequignot E, Ginzberg D, Sindel L, Soreq H, Zakut H (1992). "Mapping the human acetylcholinesterase gene to chromosome 7q22 by fluorescent in situ hybridization coupled with selective PCR amplification from a somatic hybrid cell panel and chromosome-sorted DNA libraries". Genomics. 13 (4): 1192–7. doi:10.1016/0888-7543(92)90037-S. PMID 1380483.
* Spring FA, Gardner B, Anstee DJ (1992). "Evidence that the antigens of the Yt blood group system are located on human erythrocyte acetylcholinesterase". Blood. 80 (8): 2136–41. doi:10.1182/blood.V80.8.2136.2136. PMID 1391965.
* Shafferman A, Kronman C, Flashner Y, Leitner M, Grosfeld H, Ordentlich A, et al. (1992). "Mutagenesis of human acetylcholinesterase. Identification of residues involved in catalytic activity and in polypeptide folding". J. Biol. Chem. 267 (25): 17640–8. doi:10.1016/S0021-9258(19)37091-7. PMID 1517212.
* Getman DK, Eubanks JH, Camp S, Evans GA, Taylor P (1992). "The human gene encoding acetylcholinesterase is located on the long arm of chromosome 7". Am. J. Hum. Genet. 51 (1): 170–7. PMC 1682883. PMID 1609795.
* Li Y, Camp S, Rachinsky TL, Getman D, Taylor P (1992). "Gene structure of mammalian acetylcholinesterase. Alternative exons dictate tissue-specific expression". J. Biol. Chem. 266 (34): 23083–90. doi:10.1016/S0021-9258(18)54466-5. PMID 1744105.
* Velan B, Grosfeld H, Kronman C, Leitner M, Gozes Y, Lazar A, et al. (1992). "The effect of elimination of intersubunit disulfide bonds on the activity, assembly, and secretion of recombinant human acetylcholinesterase. Expression of acetylcholinesterase Cys-580
-Ala mutant". J. Biol. Chem. 266 (35): 23977–84. doi:10.1016/S0021-9258(18)54380-5. PMID 1748670.
* Soreq H, Ben-Aziz R, Prody CA, Seidman S, Gnatt A, Neville L, et al. (1991). "Molecular cloning and construction of the coding region for human acetylcholinesterase reveals a G + C-rich attenuating structure". Proceedings of the National Academy of Sciences of the United States of America. 87 (24): 9688–92. Bibcode:1990PNAS...87.9688S. doi:10.1073/pnas.87.24.9688. PMC 55238. PMID 2263619.
* Chhajlani V, Derr D, Earles B, Schmell E, August T (1989). "Purification and partial amino acid sequence analysis of human erythrocyte acetylcholinesterase". FEBS Lett. 247 (2): 279–82. Bibcode:1989FEBSL.247..279C. doi:10.1016/0014-5793(89)81352-3. PMID 2714437. S2CID 41843002.
* Lapidot-Lifson Y, Prody CA, Ginzberg D, Meytes D, Zakut H, Soreq H (1989). "Coamplification of human acetylcholinesterase and butyrylcholinesterase genes in blood cells: correlation with various leukemias and abnormal megakaryocytopoiesis". Proceedings of the National Academy of Sciences of the United States of America. 86 (12): 4715–9. Bibcode:1989PNAS...86.4715L. doi:10.1073/pnas.86.12.4715. PMC 287342. PMID 2734315.
* Bazelyansky M, Robey E, Kirsch JF (1986). "Fractional diffusion-limited component of reactions catalyzed by acetylcholinesterase". Biochemistry. 25 (1): 125–30. doi:10.1021/bi00349a019. PMID 3954986.
* Gaston SM, Marchase RB, Jakoi ER (1982). "Brain ligatin: a membrane lectin that binds acetylcholinesterase". J. Cell. Biochem. 18 (4): 447–59. doi:10.1002/jcb.1982.240180406. PMID 7085778. S2CID 22975039.
* Ordentlich A, Barak D, Kronman C, Ariel N, Segall Y, Velan B, et al. (1995). "Contribution of aromatic moieties of tyrosine 133 and of the anionic subsite tryptophan 86 to catalytic efficiency and allosteric modulation of acetylcholinesterase". J. Biol. Chem. 270 (5): 2082–91. doi:10.1074/jbc.270.5.2082. PMID 7836436.
* Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID 8125298.
* Ben Aziz-Aloya R, Sternfeld M, Soreq H (1994). "Promoter elements and alternative splicing in the human ACHE gene". Prog. Brain Res. 98: 147–53. doi:10.1016/s0079-6123(08)62392-4. PMID 8248502.
* Massoulié J, Pezzementi L, Bon S, Krejci E, Vallette FM (1993). "Molecular and Cellular Biology of Cholinesterases". Prog. Brain Res. 41 (1): 31–91. doi:10.1016/0301-0082(93)90040-Y. PMID 8321908. S2CID 21601586.

## External links

[edit]

* ATSDR Case Studies in Environmental Medicine: Cholinesterase Inhibitors, Including Insecticides and Chemical Warfare Nerve Agents U.S. Department of Health and Human Services
* Proteopedia Acetylcholinesterase
* Proteopedia AChE_inhibitors_and_substrates
* Proteopedia AChE_inhibitors_and_substrates_(Part_II)
* Proteopedia AChE bivalent inhibitors AChE_bivalent_inhibitors AChE bivalent inhibitors
* Acetylcholinesterase: A gorge-ous enzyme—PDBe
* Acetylcholinesterase—RCSB PDB
* Human ACHE genome location and ACHE gene details page in the UCSC Genome Browser.
* Overview of all the structural information available in the PDB for UniProt: P22303 (Human Acetylcholinesterase) at the PDBe-KB.

* v
* t
* e

PDB gallery

* 1b41: HUMAN ACETYLCHOLINESTERASE COMPLEXED WITH FASCICULIN-II, GLYCOSYLATED PROTEIN

* 1f8u: CRYSTAL STRUCTURE OF MUTANT E202Q OF HUMAN ACETYLCHOLINESTERASE COMPLEXED WITH GREEN MAMBA VENOM PEPTIDE FASCICULIN-II

* 1vzj: STRUCTURE OF THE TETRAMERIZATION DOMAIN OF ACETYLCHOLINESTERASE: FOUR-FOLD INTERACTION OF A WWW MOTIF WITH A LEFT-HANDED POLYPROLINE HELIX

* v
* t
* e

Enzymes involved in neurotransmission

monoamine|

| histidine → histamine|

| anabolism:|

* Histidine decarboxylase

|

catabolism:|

* Histamine N-methyltransferase
* Diamine oxidase

tyrosine→dopamine→epinephrine|

| anabolism:|

* Tyrosine hydroxylase
* Aromatic L-amino acid decarboxylase
* Dopamine beta-hydroxylase
* Phenylethanolamine N-methyltransferase

|

catabolism:|

* Catechol-O-methyl transferase
* Monoamine oxidase
* A
* B

glutamate→GABA|

| anabolism:|

* Glutamate decarboxylase

|

catabolism:|

* 4-aminobutyrate transaminase

tryptophan→serotonin→melatonin|

* Tryptophan hydroxylase
* Aromatic L-amino acid decarboxylase
* Aralkylamine N-acetyltransferase
* Acetylserotonin O-methyltransferase

arginine→NO|

* Nitric oxide synthase (NOS1, NOS2, NOS3)

choline→Acetylcholine|

| anabolism:|

* Choline acetyltransferase

|

catabolism:|

* Cholinesterase (Acetylcholinesterase, Butyrylcholinesterase)

* v
* t
* e

Hydrolase: esterases (EC 3.1)

3.1.1: Carboxylic
ester hydrolases|

* Cholinesterase
* Acetylcholinesterase
* Butyrylcholinesterase
* Pectinesterase
* 6-phosphogluconolactonase
* PAF acetylhydrolase

* Lipase
* Bile salt-dependent
* Gastric/Lingual
* Pancreatic
* Lysosomal
* Hormone-sensitive
* Endothelial
* Hepatic
* Lipoprotein
* Monoacylglycerol
* Diacylglycerol

* Phospholipase
* A1
* A2
* B

* Cutinase
* PETase

3.1.2: Thioesterase|

* Palmitoyl protein thioesterase
* Ubiquitin carboxy-terminal hydrolase L1
* 4-hydroxybenzoyl-CoA thioesterase

3.1.3: Phosphatase|

* Alkaline phosphatase
* ALPI
* ALPL
* ALPP
* Acid phosphatase (Prostatic)/Tartrate-resistant acid phosphatase/Purple acid phosphatases
* Nucleotidase
* Glucose 6-phosphatase
* Fructose 1,6-bisphosphatase
* Calcineurin
* Protein phosphatase
* PP2A
* OCRL
* Pyruvate dehydrogenase phosphatase
* Fructose 6-P,2-kinase:fructose 2,6-bisphosphatase
* PTEN
* Phytase
* Beta-propeller phytase
* Inositol-phosphate phosphatase
* IMPA1, IMPA2, IMPA3
* Protein phosphatase: Protein tyrosine phosphatase
* Protein serine/threonine phosphatase
* Dual-specificity phosphatase

3.1.4:
Phosphodiesterase|

* Autotaxin
* Phospholipase
* C
* D
* Sphingomyelin phosphodiesterase
* 1
* PDE1
* PDE2
* PDE3
* PDE4A/PDE4B
* PDE5
* Lecithinase (Clostridium perfringens alpha toxin)
* Cyclic nucleotide phosphodiesterase

3.1.6: Sulfatase|

* arylsulfatase
* Arylsulfatase A
* Arylsulfatase B
* Arylsulfatase L
* Steroid sulfatase
* Galactosamine-6 sulfatase
* Iduronate-2-sulfatase
* N-acetylglucosamine-6-sulfatase

Nuclease (includes
deoxyribonuclease
and ribonuclease)|

| 3.1.11-16:
Exonuclease|

| Exodeoxyribonuclease|

* RecBCD

|

Exoribonuclease|

* Oligonucleotidase

3.1.21-31:
Endonuclease|

| Endodeoxyribonuclease|

* Deoxyribonuclease I
* Deoxyribonuclease II
* Deoxyribonuclease IV
* Restriction enzyme;see {{Restriction enzyme}}
* UvrABC endonuclease

|

Endoribonuclease|

* RNase III
* Drosha: Microprocessor complex
* Dicer: RNA-induced silencing complex
* RNase H
* 1
* 2A
* 2B
* 2C
* RNase P
* RNase A
* RNase Z
* RNase E
* 1
* 2
* 3
* 4/5
* RNase T1

either deoxy- or ribo-  |

* Nuclease S1
* Mung bean nuclease
* Serratia marcescens nuclease
* Micrococcal nuclease

* v
* t
* e

Enzymes

Activity|

* Active site
* Binding site
* Catalytic triad
* Oxyanion hole
* Enzyme promiscuity
* Diffusion-limited enzyme
* Cofactor
* Enzyme catalysis

Regulation|

* Allosteric regulation
* Cooperativity
* Enzyme inhibitor
* Enzyme activator

Classification|

* EC number
* Enzyme superfamily
* Enzyme family
* List of enzymes

Kinetics|

* Enzyme kinetics
* Eadie–Hofstee diagram
* Hanes–Woolf plot
* Lineweaver–Burk plot
* Michaelis–Menten kinetics

Types|

* EC1 Oxidoreductases (list)
* EC2 Transferases (list)
* EC3 Hydrolases (list)
* EC4 Lyases (list)
* EC5 Isomerases (list)
* EC6 Ligases (list)
* EC7 Translocases (list)

* v
* t
* e

Acetylcholine metabolism and transport modulators

Enzyme
(modulators)|

| ChATTooltip Choline acetyltransferase|

* Inhibitors: 1-(-Benzoylethyl)pyridinium
* 2-(α-Naphthoyl)ethyltrimethylammonium
* 3-Chloro-4-stillbazole
* 4-(1-Naphthylvinyl)pyridine
* Acetylseco hemicholinium-3
* Acryloylcholine
* AF64A
* B115
* BETA
* CM-54,903
* N,N-Dimethylaminoethylacrylate
* N,N-Dimethylaminoethylchloroacetate

|

AChETooltip Acetylcholinesterase|

* Inhibitors: Reversible: Carbamates: Aldicarb
* Aminocarb
* Bendiocarb
* Bufencarb
* Carbaryl
* Carbendazim
* Carbetamide
* Carbofuran
* Carbosulfan
* Chlorbufam
* Chloropropham
* Dimetilan
* Ethienocarb
* Ethiofencarb
* Fenobucarb
* Formetanate
* Formparanate
* Methiocarb
* Methomyl
* Metolcarb
* Miotine
* Oxamyl
* Phenmedipham
* Pinmicarb
* Pirimicarb
* Promecarb
* Propamocarb
* Propham
* Propoxur
* Thiodicarb
* Thiofanox; Stigmines: Distigmine
* Eptastigmine
* Ganstigmine
* Neostigmine +glycopyrronium bromide
* Phenserine
* Physostigmine
* Pyridostigmine
* Quilostigmine
* Rivastigmine
* Terestigmine; Others: Acotiamide
* Ambenonium
* Caffeine
* Donepezil
* EA-3990
* EA-4056
* Edrophonium
* Galantamine
* Huperzine A
* Huprine W
* Huprine X
* Huprine Y
* Ipidacrine
* Itopride
* Ladostigil
* Minaprine
* Octamethylene-bis(5-dimethylcarbamoxyisoquinolinium bromide)
* T-1123
* T-1152
* T-1194
* TL-599
* TL-1238
* Tacrine
* Zanapezil

* Irreversible: Organophosphates: 2-Ethoxycarbonyl-1-methylvinyl cyclohexyl methylphosphonate
* Acephate
* Armine
* Azinphos-ethyl
* Azinphos-methyl
* BAY-29952
* Bensulide
* Cadusafos
* Carbophenothion
* Chlorethoxyfos
* Chlorfenvinphos
* Chlorpyrifos
* Chlorpyrifos-methyl
* Coumaphos
* Crotylsarin
* Cyanophos
* Cyclosarin (GF)
* Demephion
* Demeton
* Demeton-S-methyl
* Dialifor
* Diazinon
* Dichlorvos
* Dicrotophos
* Dicyclohexyl phosphorofluoridate
* Diisopropylphosphate
* Diisopropyl fluorophosphate
* Dimefox
* Dimethoate
* Dimethyl 4-(methylthio)phenyl phosphate
* Dioxathion
* Disulfoton
* EA-2012
* EA-2054
* EA-2098
* EA-2192
* EA-2613
* EA-3148
* EA-4352
* Echothiophate
* Ethylsarin (GE)
* Endothion
* EPN
* Ethion
* Ethoprop
* Fenamiphos
* Fenitrothion
* Fenthion
* Fluorotabun
* Fonofos
* Formothion
* Fosthiazate
* GD-42
* GH
* GT-45
* GV
* Guanitoxin
* Hexaethyl tetraphosphate (HETP)
* Isofluorophate
* Isoxathion
* Leptophos
* Malaoxon
* Malathion
* Mazidox
* Methamidophos
* Methidathion
* Methyl phenkapton
* Methylfluorophosphonylcholine (MFPCh)
* Metrifonate
* Mevinphos
* Mipafox
* Monocrotophos
* MSPI
* Naled
* Novichok agent
* Omethoate
* Oxydemeton-methyl
* Paraoxon
* Parathion
* Parathion-methyl
* Phorate
* Phosalone
* Phosfolan
* Phosmet
* Phosphamidon
* Phoxim
* Pirimiphos-methyl
* Profenofos
* Prothoate
* R-16661
* Ro 3-0340
* Ro 3-0346
* Ro 3-0347
* Ro 3-0351
* Ro 3-0352
* Ro 3-0397
* Ro 3-0411
* Ro 3-0412
* Ro 3-0417
* Ro 3-0419
* Ro 3-0422
* Ro 3-0433
* Ronnel
* Sarin (GB)
* Schradan
* Soman (GD)
* Sulfotep (TEDP)
* Tabun (GA)
* Tebupirimfos
* Temefos
* Terbufos
* Tetrachlorvinphos
* Tetraethyl pyrophosphate (TEPP)
* Triazofos
* Tribufos
* Trichlorfon
* Trichloronate
* Tricresyl phosphate
* VE
* VG
* VM
* VP
* VS
* VR
* VX; Others: Demecarium
* Fasciculins (green mamba toxins) (1, 2, 3, 4)
* Onchidal (Onchidella binneyi)
* Methanesulfonyl fluoride

* Unsorted: α-Pinene
* α-Viniferin
* Affinine
* Affinisine
* Arisugacin A
* Bulbocapnine
* Conodurine
* Coronaridine
* Corydaline
* Corynoline
* Crimidine
* Cyclanoline
* Cymserine
* Harmaline
* Kobophenol A
* Lactucopicrin
* Lycorine
* Phosacetim
* Rosmarinic acid
* Stercuronium iodide
* Taspine
* Tetrahydrocannabinol
* Ungeremine
* Ungiminorine
* Dimethylcarbamoyl fluoride
* BW284C51
* TMTFA
* 3152 CT

* Reactivators: Asoxime chloride
* Methoxime
* Obidoxime
* Pralidoxime
* Trimedoxime bromide

BChETooltip Butyrylcholinesterase|

* Inhibitors: Affinine
* Affinisine
* Conodurine
* Cymserine
* Ladostigil
* Profenamine (ethopropazine)
* Rivastigmine
* Tacrine
* ZINC-12613047
* Many of the other AChE inhibitors listed above

Transporter
(modulators)|

| CHTTooltip Choline transporter|

* Inhibitors: Hemicholinium-3 (hemicholine)
* Triethylcholine

* Enhancers: Coluracetam

|

VAChTTooltip Vesicular acetylcholine transporter|

* Inhibitors: Vesamicol

Release
(modulators)|

| Inhibitors|

* SNAP-25Tooltip Synaptosomal-associated protein 25 inactivators: Botulinum toxin (A, C, E)

* VAMPTooltip Vesicle-associated membrane protein inactivators: Botulinum toxin (B, D, F, G)

* Others: Bungarotoxins (β-bungarotoxin, γ-bungarotoxin)

|

Enhancers|

* LPHNTooltip Latrophilin agonists: α-Latrotoxin

* Others: Atracotoxins (e.g., robustoxin, versutoxin)
* Crotoxin

See also
Receptor/signaling modulators
Muscarinic acetylcholine receptor modulators
Nicotinic acetylcholine receptor modulators
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template
*[ChAT]: Choline acetyltransferase
*[AChE]: Acetylcholinesterase
*[BChE]: Butyrylcholinesterase
*[CHT]: Choline transporter
*[VAChT]: Vesicular acetylcholine transporter
*[SNAP-25]: Synaptosomal-associated protein 25
*[VAMP]: Vesicle-associated membrane protein
*[LPHN]: Latrophilin