home *** CD-ROM | disk | FTP | other *** search
- ************************************************************************
- * 6-hydroxy-D-nicotine oxidase and reticuline oxidase FAD-binding site *
- ************************************************************************
-
- 6-hydroxy-D-nicotine oxidase (EC 1.5.3.6) (6-HDNO) [1] is a bacterial enzyme
- that catalyzes the oxygen-dependent degradation of 6-hydroxynicotine into
- 6-hydroxypyrid-N-methylosmine; it is a flavoprotein that contains a covalently
- bound FAD group which is attached to a histidine via an 8-alpha-(N3-histidyl)-
- riboflavin linkage. 6-HDNO shows structural and functional similarities with
- plant reticuline oxidase (EC 1.5.3.9) [2] (berberine-bridge-forming enzyme) an
- enzyme that catalyzes the oxidation of (S)-reticuline into (S)-scoulerine in
- the pathway leading to benzophenanthridine alkaloids.
-
- The region around the histidine that binds the FAD group is conserved in both
- enzymes and can be used as a signature pattern.
-
- -Consensus pattern: R-S-G-G-H-x(3)-G
- [H is the FAD binding site]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: October 1993 / First entry.
-
- [ 1] Brandsch R., Hinkkanen A.E., Mauch L., Nagursky H., Decker K.
- Eur. J. Biochem. 167:315-320(1987).
- [ 2] Dittrich H., Kutchan T.M.
- Proc. Natl. Acad. Sci. U.S.A. 88:9969-9973(1991).
-