home *** CD-ROM | disk | FTP | other *** search
- *****************************************************
- * Iron-containing alcohol dehydrogenases signatures *
- *****************************************************
-
- Alcohol dehydrogenase (EC 1.1.1.1) (ADH) catalyzes the reversible oxidation of
- ethanol to acetaldehyde with the concomitant reduction of NAD [1]. Currently
- three, structurally and catalytically, different types of alcohol
- dehydrogenases are known:
-
- - Zinc-containing 'long-chain' alcohol dehydrogenases.
- - Insect-type, or 'short-chain' alcohol dehydrogenases.
- - Iron-containing alcohol dehydrogenases.
-
- Iron-containing ADH's have been found in yeast (gene ADH4) [2], as well as in
- Zymomonas mobilis (gene adhB) [3]. These two iron-containing ADH's are closely
- related to the following enzymes:
-
- - Escherichia coli propanediol oxidoreductase (EC 1.1.1.77) (gene fucO) [4],
- an enzyme involved in the metabolism of fucose and which also seems to
- contain ferrous ion(s).
- - Clostridium acetobutylicum NADPH- and NADH-dependent butanol dehydrogenases
- (EC 1.1.1.-) (genes adh1, bdhA and bdhB) [5], an enzyme which has activity
- using butanol and ethanol as substrates.
- - Escherichia coli adhE [6], an iron-dependent enzyme which harbor three
- different activities: alcohol dehydrogenase, acetaldehyde dehydrogenase
- (acetylating) (EC 1.2.1.10) and pyruvate-formate-lyase deactivase.
- - Bacillus stearothermophilus and Escherichia coli glycerol dehydrogenase
- (EC 1.1.1.6) (gene gldA) [7].
- - Bacillus methanolicus NAD-dependent methanol dehydrogenase (EC 1.1.1.244)
- [8].
-
- The patterns that we developed to detect this class of enzymes are based on
- two conserved regions. The second pattern includes three histidine residues
- which could be important for binding the ferrous ion(s).
-
- -Consensus pattern: P-x(5)-D-[STAP]-x(6)-P-x(4)-[AI]-x-[GST]-x(2)-D-[AI]-
- [LIVM]-x(4)-E
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: H-x(2)-[SAE]-H-x(2)-[SGA](2)-x(5)-H-G
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for glycerol dehydrogenase and Clostridium acetobutylicum adhE.
- -Other sequence(s) detected in SWISS-PROT: bovine succinate dehydrogenase
- flavoprotein subunit.
-
- -Last update: June 1994 / Patterns and text revised.
-
- [ 1] Branden C.-I., Joernvall H., Eklund H., Furugren B.
- (In) The Enzymes (3rd edition) 11:104-190(1975).
- [ 2] Conway T., Sewell G.W., Osman Y.A., Ingram L.O.
- J. Bacteriol. 169:2591-2597(1987).
- [ 3] Williamson V.M., Paquin C.E.
- Mol. Gen. Genet. 209:374-381(1987).
- [ 4] Conway T., Ingram L.O.
- J. Bacteriol. 171:3754-3759(1989).
- [ 5] Walter K.A., Bennett G.N., Papoutsakis E.T.
- J. Bacteriol. 174:7149-7158(1992).
- [ 6] Kessler D., Leibrecht I., Knappe J.
- FEBS Lett. 281:59-63(1991).
- [ 7] Truniger V., Boos W.
- J. Bacteriol. 176:1796-1800(1994).
- [ 8] de Vries G.E., Arfman N., Terpstra P., Dijkhuizen L.
- J. Bacteriol. 174:5346-5353(1992).
-