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- ********************************************************
- * Glycosyl hydrolases family 25 active sites signature *
- ********************************************************
-
- It has been shown [1,2] that a number of cell-wall lytic enzymes (EC 3.2.1.17
- and EC 3.5.1.28) are evolutionary related and can be classified into a single
- family:
-
- - N-acetylmuramoyl-L-alanine amidase (muramidase) (lysin) from Streptococcus
- pneumoniae bacteriophages of the Cp family.
- - Autolytic lysozyme from Clostridium acetobutylicum.
- - Lysozyme (endolysin) from Lactococcus delbrueckii phage mv1.
- - Lysozyme M1 from Streptomyces globisporus.
- - N,O-diacetylmuramidase (lysozyme ch) from the fungus Chalaropsis.
-
- Two residues, an aspartate and a glutamate, have been shown [3] to be
- important for the catalytic activity of the Charalopsis enzyme. These residues
- as well as some others in their vicinity are conserved in all proteins from
- this family and can be used as a signature pattern.
-
- -Consensus pattern: D-[LIVM]-x(3)-[NQ]-[PG]-x(9,10)-G-x(4)-[LIVMFY](2)-K-x-
- [ST]-E-[GS]-x(2)-Y-x-[DN]
- [D and E are active site residues]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Expert(s) to contact by email: Henrissat B.
- bernie@cermav.grenet.fr
-
- -Last update: June 1994 / First entry.
-
- [ 1] Croux C., Garcia J.L.
- Gene 104:25-31(1991).
- [ 2] Henrissat B.
- Biochem. J. 280:309-316(1991).
- [ 3] Fouche P.B., Hash J.H.
- J. Biol. Chem. 253:6787-6793(1978).
-