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- * Ubiquitin carboxyl-terminal hydrolases family 1 putative active-site *
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-
- Ubiquitin carboxyl-terminal hydrolases (EC 3.1.2.15) (UCH) (deubiquitinating
- enzymes) [1] are thiol proteases that recognize and hydrolyze the peptide
- bond at the C-terminal glycine of ubiquitin. These enzymes are involved in the
- processing of poly-ubiquitin precursors as well as that of ubiquinated
- proteins.
-
- There are two distinct families of UCH. The first class consist of enzymes of
- about 25 Kd and is currently represented by:
-
- - Mammalian isozymes L1 and L3.
- - Yeast YUH1.
- - Drosophila Uch.
-
- The active site of class-I UCH must correspond to the only cysteine residue
- conserved. We derived a signature pattern from around that residue. This
- pattern also includes one of the two conserved histidine residues, of which
- one must participate in the catalytic mechanism.
-
- -Consensus pattern: N-x-C-G-x(3)-[LIVM](2)-H
- [C is the putative active site residue]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1994 / Text revised.
-
- [ 1] Jentsch S., Seufert W., Hauser H.-P.
- Biochim. Biophys. Acta 1089:127-139(1991).
-