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- ***************************************************
- * Aspartic acid and asparagine hydroxylation site *
- ***************************************************
-
- Post-translational hydroxylation of aspartic acid or asparagine [1] to form
- erythro-beta-hydroxyaspartic acid or erythro-beta-hydroxyasparagine has been
- identified in a number of proteins with domains homologous to epidermal growth
- factor (EGF). Examples of such proteins are the blood coagulation protein
- factors VII, IX and X, proteins C, S, and Z, the LDL receptor, thrombomodulin,
- etc. Based on sequence comparisons of the EGF-homology region that contains
- hydroxylated Asp or Asn, a consensus sequence has been identified that seems
- to be required by the hydroxylase(s).
-
- -Consensus pattern: C-x-[DN]-x(4)-[FY]-x-C-x-C
- [D or N is the hydroxylation site]
-
- -Note: this consensus pattern is located in the N-terminal of EGF-like
- domains, while our EGF-like cysteine pattern signature (see the relevant
- section) is located in the C-terminal.
-
- -Last update: January 1989 / First entry.
-
- [ 1] Stenflo J., Ohlin A.-K., Owens W.G., Schneider W.J.
- J. Biol. Chem. 263:21-24(1988).
-