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- ********************************************************
- * Bacterial Ribonuclease P protein component signature *
- ********************************************************
-
- Ribonuclease P (EC 3.1.26.5) (RNase P) [1,2,3] is a site specific endonuclease
- that generates mature tRNAs by cleaving-off the leader sequences at their
- 5'ends. In bacteria RNase P is known to be composed of two components: a large
- (about 400 base pairs) RNA (gene rnpB) and a small protein (119 to 133 amino
- acids) (gene rnpA). The RNA moiety of RNase P carries the catalytic activity;
- the function of the protein component is not yet clear although it may act as
- an electrostatic screen allowing the highly negatively charged RNA enzyme-
- substrate complex to fold into the catalytic conformation.
-
- The sequence of rnpA is not highly conserved, however there is, in the central
- part of the protein, a conserved region. We have used this region as a
- signature pattern.
-
- -Consensus pattern: A-x(2)-R-N-x-[LIVM]-K-R-x(2)-R
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1992 / First entry.
-
- [ 1] Pace N.R., Smith D.
- J. Biol. Chem. 265:3587-3590(1990).
- [ 2] Altman S.
- J. Biol. Chem. 265:20053-20056(1990).
- [ 3] Brown J.W., Pace N.R.
- Nucleic Acids Res. 20:1451-1456(1992).
-