| EC |
1.8.7.1 |
| Accepted name: |
assimilatory sulfite reductase (ferredoxin) |
| Reaction: |
hydrogen sulfide + 6 oxidized ferredoxin [iron-sulfur] cluster + 3 H2O = sulfite + 6 reduced ferredoxin [iron-sulfur] cluster + 6 H+ |
| Other name(s): |
ferredoxin-sulfite reductase; SIR (gene name); sulfite reductase (ferredoxin) |
| Systematic name: |
hydrogen-sulfide:ferredoxin oxidoreductase |
| Comments: |
An iron protein. The enzyme participates in sulfate assimilation. While it is usually found in cyanobacteria, plants and algae, it has also been reported in bacteria [4]. Different from EC 1.8.99.5, dissimilatory sulfite reductase, which is involved in prokaryotic sulfur-based energy metabolism. cf. EC 1.8.1.2, assimilatory sulfite reductase (NADPH). |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 37256-50-1 |
| References: |
| 1. |
Schmidt, A. and Trebst, A. The mechanism of photosynthetic sulfate reduction by isolated chloroplasts. Biochim. Biophys. Acta 180 (1969) 529–535. [DOI] [PMID: 4390248] |
| 2. |
Gisselmann, G., Klausmeier, P. and Schwenn, J.D. The ferredoxin:sulphite reductase gene from Synechococcus PCC7942. Biochim. Biophys. Acta 1144 (1993) 102–106. [DOI] [PMID: 8347657] |
| 3. |
Bork, C., Schwenn, J.D. and Hell, R. Isolation and characterization of a gene for assimilatory sulfite reductase from Arabidopsis thaliana. Gene 212 (1998) 147–153. [DOI] [PMID: 9661674] |
| 4. |
Neumann, S., Wynen, A., Truper, H.G. and Dahl, C. Characterization of the cys gene locus from Allochromatium vinosum indicates an unusual sulfate assimilation pathway. Mol. Biol. Rep. 27 (2000) 27–33. [PMID: 10939523] |
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| [EC 1.8.7.1 created 1972, modified 2015] |
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