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- *****************************************************************
- * Copper type II, ascorbate-dependent monooxygenases signatures *
- *****************************************************************
-
- Copper type II, ascorbate-dependent monooxygenases [1] are a class of enzymes
- that requires copper as a cofactor and which uses ascorbate as an electron
- donor. The enzymes which belong to this category are:
-
- - Dopamine-beta-monooxygenase (EC 1.14.17.1) (DBH) [2], which catalyzes the
- conversion of dopamine to the neurotransmitter norepinephrine.
- - Peptidyl-glycine alpha-amidating monooxygenase (EC 1.14.17.3) (PAM), which
- catalyzes the conversion of the carboxy-terminal glycine of many active
- peptides and hormones to an amide group.
-
- There are a few regions of sequence similarities between these two enzymes,
- two of these regions contain clusters of conserved histidine residues which
- are most probably involved in binding copper. We selected these two regions
- as signature patterns.
-
- -Consensus pattern: H-H-M-x(2)-F-x-C
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: H-x-F-x(4)-H-T-H-x(2)-G
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: April 1990 / First entry.
-
- [ 1] Southan C., Kruse L.I.
- FEBS Lett. 255:116-120(1989).
- [ 2] Stewart L.C., Klinman J.P.
- Annu. Rev. Biochem. 57:551-592(1988).
-