EC - Assimilatory sulfite reductase (ferredoxin)

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IntEnz Enzyme Nomenclature


Accepted name:
assimilatory sulfite reductase (ferredoxin)
Other names:
ferredoxin-sulfite reductase
SIR (gene name)
sulfite reductase (ferredoxin)
Systematic name:
hydrogen-sulfide:ferredoxin oxidoreductase




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]. cf. EC, assimilatory sulfite reductase (NADPH).

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Protein domains and families: PROSITE:PDOC00314
Structural data: CSA , EC2PDB
Gene Ontology: GO:0050311
CAS Registry Number: 37256-50-1
UniProtKB/Swiss-Prot: (12) [show] [UniProt]


  1. Schmidt, A. and Trebst, A.
    The mechanism of photosynthetic sulfate reduction by isolated chloroplasts.
    Biochim. Biophys. Acta 180 : 529-535 (1969). [PMID: 4390248]
  2. Gisselmann, G., Klausmeier, P., Schwenn, J. D.
    The ferredoxin:sulphite reductase gene from Synechococcus PCC7942.
    Biochim. Biophys. Acta 1144 : 102-106 (1993). [PMID: 8347657]
  3. Bork, C., Schwenn, J. D., Hell, R.
    Isolation and characterization of a gene for assimilatory sulfite reductase from Arabidopsis thaliana.
    Gene 212 : 147-153 (1998). [PMID: 9661674]
  4. Neumann, S., Wynen, A., Truper, H. G., Dahl, C.
    Characterization of the cys gene locus from Allochromatium vinosum indicates an unusual sulfate assimilation pathway.
    Mol. Biol. Rep. 27 : 27-33 (2000). [PMID: 10939523]

[EC created 1972, modified 2015]