home *** CD-ROM | disk | FTP | other *** search
- ******************
- * Amidation site *
- ******************
-
- The precursor of hormones and other active peptides which are C-terminally
- amidated is always directly followed [1,2] by a glycine residue which provides
- the amide group, and most often by at least two consecutive basic residues
- (Arg or Lys) which generally function as an active peptide precursor cleavage
- site. Although all amino acids can be amidated, neutral hydrophobic residues
- such as Val or Phe are good substrates, while charged residues such as Asp or
- Arg are much less reactive. C-terminal amidation has not yet been shown to
- occur in unicellular organisms or in plants.
-
- -Consensus pattern: x-G-[RK]-[RK]
- [x is the amidation site]
- -Last update: June 1988 / First entry.
-
- [ 1] Kreil G.
- Meth. Enzymol. 106:218-223(1984).
- [ 2] Bradbury A.F., Smyth D.G.
- Biosci. Rep. 7:907-916(1987).
-