From Wikidoc - Reading time: 11 min
Associate Editor(s)-in-Chief: Henry A. Hoff
"DNA-binding by the GR-DBD has been well-characterized; it is highly sequence-specific, directly recognizing invariant guanine nucleotides of two AGAACA [TGTTCT] half sites called the glucocorticoid response element (GRE), and binds as a dimer in head-to-head orientation with mid-nanomolar affinity (4,12–18). [...] The consensus DNA glucocorticoid response element (GRE) is comprised of two half-sites (AGAACA) separated by a three base-pair spacer (13,15,60,61)."[1]
Copying an apparent consensus sequence of AGAACA and putting it in "⌘F" finds one located between ZSCAN22 and A1BG and two between ZNF497 and A1BG as can be found by the computer programs.
For the Basic programs testing consensus sequence AGAACA (starting with SuccessablesGlu.bas) written to compare nucleotide sequences with the sequences on either the template strand (-), or coding strand (+), of the DNA, in the negative direction (-), or the positive direction (+), the programs are, are looking for, and found:
"DNA-binding by the GR-DBD has been well-characterized; it is highly sequence-specific, directly recognizing invariant guanine nucleotides of two AGAACA [TGTTCT] half sites called the glucocorticoid response element (GRE), and binds as a dimer in head-to-head orientation with mid-nanomolar affinity (4,12–18). [...] The consensus DNA glucocorticoid response element (GRE) is comprised of two half-sites (AGAACA) separated by a three base-pair spacer (13,15,60,61)."[1]
| Reals or randoms | Promoters | direction | Numbers | Strands | Occurrences | Averages (± 0.1) |
|---|---|---|---|---|---|---|
| Reals | UTR | negative | 5 | 2 | 2.5 | 2.5 ± 1.5 (--4,+-1) |
| Randoms | UTR | arbitrary negative | 1 | 10 | 0.1 | 0.1 |
| Randoms | UTR | alternate negative | 1 | 10 | 0.1 | 0.1 |
| Reals | Core | negative | 0 | 2 | 0 | 0 |
| Randoms | Core | arbitrary negative | 0 | 10 | 0 | 0 |
| Randoms | Core | alternate negative | 0 | 10 | 0 | 0 |
| Reals | Core | positive | 0 | 2 | 0 | 0 |
| Randoms | Core | arbitrary positive | 0 | 10 | 0 | 0 |
| Randoms | Core | alternate positive | 0 | 10 | 0 | 0 |
| Reals | Proximal | negative | 0 | 2 | 0 | 0 |
| Randoms | Proximal | arbitrary negative | 0 | 10 | 0 | 0.05 |
| Randoms | Proximal | alternate negative | 1 | 10 | 0.1 | 0.05 |
| Reals | Proximal | positive | 1 | 2 | 0.5 | 0.5 ± 0.5 (-+1,++0) |
| Randoms | Proximal | arbitrary positive | 1 | 10 | 0.1 | 0.05 |
| Randoms | Proximal | alternate positive | 0 | 10 | 0 | 0.05 |
| Reals | Distal | negative | 3 | 2 | 1.5 | 1.5 ± 1.5 (--1,+-2) |
| Randoms | Distal | arbitrary negative | 5 | 10 | 0.5 | 0.55 |
| Randoms | Distal | alternate negative | 6 | 10 | 0.6 | 0.55 |
| Reals | Distal | positive | 2 | 2 | 1 | 1 ± 1 (-+2,++0) |
| Randoms | Distal | arbitrary positive | 7 | 10 | 0.7 | 0.6 |
| Randoms | Distal | alternate positive | 5 | 10 | 0.5 | 0.6 |
Comparison:
The occurrences of real Glucocorticoid UTRs, proximals and distals are greater than the randoms. This suggests that the real Glucocorticoid response elements are likely active or activable.
Stimulation of the pathway gluconeogenesis, in particular, in the liver results in the synthesis of glucose from non-hexose substrates, such as amino acids and glycerol from triglyceride breakdown, and is particularly important in carnivores and certain herbivores.
The content on this page was first contributed by: Henry A. Hoff.