GABRD

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Gamma-aminobutyric acid receptor subunit delta is a protein that in humans is encoded by the GABRD gene.[1][2][3]

## Contents

* 1 Function
* 2 Cell type-specific expression
* 3 See also
* 4 References
* 5 Further reading
* 6 External links

## Function

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γ-Aminobutyric acid (GABA) is the major inhibitory neurotransmitter in the mammalian brain where it acts at GABAA receptors, which are ligand-gated chloride channels. The GABAA receptor is generally pentameric. Its five subunits are alpha, beta, gamma, delta, and rho. The GABRD gene encodes the delta subunit.[3] Specifically, the δ-subunit is usually expressed in GABAA receptors associated with extrasynaptic activity. The most common GABAA receptors have the gamma subunit, which allows the receptor to bind benzodiazepines. For this reason, receptors containing δ-subunits are sometimes referred to as “benzodiazepine insensitive” GABAA receptors. The δ-subunit containing receptors are also known to be involved in the ventral tegmental area (VTA) pathway in the brain's hippocampus, which means that they may have implications in learning, memory, and reward.[4]

## Cell type-specific expression

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In a technical comparison between quantitative reverse transcriptase PCR and digital PCR, the expression of the rat gabrd gene was examined across three cell types in the somatosensory cortex: neurogliaform cells, fast spiking basket cells and pyramidal cells.[5] Gene expression was detected in all three cell types, but showed marked enrichment in neurogliaform cells versus the other cell types examined.[5]

## See also

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* GABAA receptor

## References

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1. ↑ Sommer B, Poustka A, Spurr NK, Seeburg PH (Oct 1990). "The murine GABAA receptor delta-subunit gene: structure and assignment to human chromosome 1". DNA and Cell Biology. 9 (8): 561–8. doi:10.1089/dna.1990.9.561. PMID 2176788.
2. ↑ Emberger W, Windpassinger C, Petek E, Kroisel PM, Wagner K (Sep 2000). "Assignment of the human GABAA receptor delta-subunit gene (GABRD) to chromosome band 1p36.3 distal to marker NIB1364 by radiation hybrid mapping". Cytogenetics and Cell Genetics. 89 (3–4): 281–2. doi:10.1159/000015636. PMID 10965146.
3. ↑ 3.0 3.1 "Entrez Gene: GABRD gamma-aminobutyric acid (GABA) A receptor, delta".
4. ↑ Vashchinkina E, Panhelainen A, Aitta-Aho T, Korpi ER (2014-11-25). "GABAA receptor drugs and neuronal plasticity in reward and aversion: focus on the ventral tegmental area". Frontiers in Pharmacology. 5: 256. doi:10.3389/fphar.2014.00256. PMC 4243505. PMID 25505414.
5. ↑ 5.0 5.1 Faragó N, Kocsis ÁK, Lovas S, Molnár G, Boldog E, Rózsa M, Szemenyei V, Vámos E, Nagy LI, Tamás G, Puskás LG (Jun 2013). "Digital PCR to determine the number of transcripts from single neurons after patch-clamp recording". BioTechniques. 54 (6): 327–36. doi:10.2144/000114029. PMID 23750542.

## Further reading

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* Lim J, Hao T, Shaw C, Patel AJ, Szabó G, Rual JF, Fisk CJ, Li N, Smolyar A, Hill DE, Barabási AL, Vidal M, Zoghbi HY (May 2006). "A protein-protein interaction network for human inherited ataxias and disorders of Purkinje cell degeneration". Cell. 125 (4): 801–14. doi:10.1016/j.cell.2006.03.032. PMID 16713569.
* Lenzen KP, Heils A, Lorenz S, Hempelmann A, Sander T (Jun 2005). "Association analysis of the Arg220His variation of the human gene encoding the GABA delta subunit with idiopathic generalized epilepsy". Epilepsy Research. 65 (1–2): 53–7. doi:10.1016/j.eplepsyres.2005.04.005. PMID 16023832.
* Windpassinger C, Kroisel PM, Wagner K, Petek E (Jun 2002). "The human gamma-aminobutyric acid A receptor delta (GABRD) gene: molecular characterisation and tissue-specific expression". Gene. 292 (1–2): 25–31. doi:10.1016/S0378-1119(02)00649-2. PMID 12119096.

## External links

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* GABRD+protein,+human at the US National Library of Medicine Medical Subject Headings (MeSH)

This article incorporates text from the United States National Library of Medicine, which is in the public domain.

* v
* t
* e

Ion channel, cell surface receptor: ligand-gated ion channels

Cys-loop receptors|

| 5-HT/serotonin|

* 5-HT3
* A
* B
* C
* D
* E

|

GABA|

* GABAA
* α1
* α2
* α3
* α4
* α5
* α6
* β1
* β2
* β3
* γ1
* γ2
* γ3
* δ
* ε
* π
* θ
* GABAA-ρ
* ρ1
* ρ2
* ρ3

Glycine|

* α1
* α2
* α3
* α4
* β

Nicotinic acetylcholine|

* monomers: α1
* α2
* α3
* α4
* α5
* α6
* α7
* α9
* α10
* β1
* β2
* β3
* β4
* δ
* ε

* pentamers: (α3)2(β4)3
* (α4)2(β2)3
* (α7)5
* (α1)2(β4)3 \- Ganglion type
* (α1)2β1δε - Muscle type

Zinc|

* Zinc-activated

Ionotropic glutamates|

| Ligand-gated only|

* AMPA (1
* 2
* 3
* 4)
* Kainate
* 1
* 2
* 3
* 4
* 5

|

Voltage- and ligand-gated|

* NMDA
* 1
* 2A
* 2B
* 2C
* 2D
* 3A
* 3B
* L1A
* L1B

‘Orphan’|

* GluD
* δ1
* δ2

ATP-gated channels|

| Purinergic receptors|

* P2X
* 1
* 2
* 3
* 4
* 5
* 6
* 7

|

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