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Information on EC 1.8.1.2 - assimilatory sulfite reductase (NADPH)

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IUBMB Comments
Contains siroheme, [4Fe-4S] cluster, FAD and FMN. The enzyme, which catalyses the six-electron reduction of sulfite to sulfide, is involved in sulfate assimilation in bacteria and yeast. Different from EC 1.8.99.5, dissimilatory sulfite reductase, which is involved in prokaryotic sulfur-based energy metabolism. cf. EC 1.8.7.1, assimilatory sulfite reductase (ferredoxin).
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Word Map
The expected taxonomic range for this enzyme is: Bacteria, Archaea, Eukaryota
Reaction Schemes
Synonyms
sulfite reductase, sir-fp, sir-hp, nadph-sulfite reductase, sirhp, desulforubidin, cysij, nadph-dependent sulfite reductase, h2s-nadp oxidoreductase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
hydrogen sulfide + 3 NADP+ + 3 H2O = sulfite + 3 NADPH + 3 H+
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