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- * ATP:guanido phosphotransferases active site *
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-
- ATP:guanido phosphotransferases are a family of structurally and functionally
- related enzymes [1] that reversibly catalyze the transfer of phosphate between
- ATP and various phosphogens. The enzymes that belongs to this family are:
-
- - Creatine kinase (EC 2.7.3.2) (CK) [2,3], which plays an important role in
- energy metabolism of vertebrates. It catalyzes the reversible transfer of
- high energy phosphate from ATP to creatine, generating phosphocreatine and
- ADP. There are at least four different, but very closely related, forms of
- CK. Two of the CK isozymes are cytosolic: the M (muscle) and B (brain)
- forms while the two others are mitochondrial. In sea urchin there is a
- flagellar isozyme [4], which consists of the triplication of a CK-domain.
- - Arginine kinase (EC 2.7.3.3), an enzyme that catalyzes the transfer of
- phosphate from ATP to arginine.
- - Taurocyamine kinase (EC 2.7.3.4), an annelid-specific enzyme that catalyzes
- the transfer of phosphate from ATP to taurocyamine.
- - Lombricine kinase (EC 2.7.3.5), an annelid-specific enzyme that catalyzes
- the transfer of phosphate from ATP to lombricine.
- - Smc74 [1], a cercaria-specific enzyme from Schistosoma mansoni. This enzyme
- consists of two CK-related duplicated domains. The substrate(s) specificity
- of Smc74 is not yet known.
-
- A cysteine residue is implicated in the catalytic activity of these enzymes.
- The region around this active site residue is highly conserved and can be used
- as a signature pattern.
-
- -Consensus pattern: C-P-x(0,1)-[ST]-N-[IL]-G-T
- [C is the 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: November 1990 / Pattern and text revised.
-
- [ 1] Stein L.D., Harn D.A., David J.R.
- J. Biol. Chem. 265:6582-6588(1990).
- [ 2] Bessman S.-P., Carpenter C.L.
- Annu. Rev. Biochem. 54:831-862(1985).
- [ 3] Haas R.C., Strauss A.W.
- J. Biol. Chem. 265:6921-6927(1990).
- [ 4] Wothe D.D., Charbonneau H., Shapiro B.M.
- Proc. Natl. Acad. Sci. U.S.A. 87:5203-5207(1990).
-