The name of this superfamily has been modified since the most recent official CATH+ release (v4_2_0). At the point of the last release, this superfamily was named:

"
Sulfite Reductase Hemoprotein, domain 1
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 4966: Sulfite reductase (NADPH) hemoprotein, beta-compon...

There are 3 EC terms in this cluster

Please note: EC annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

Note: The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.

EC Term Annotations Evidence
Assimilatory sulfite reductase (NADPH). [EC: 1.8.1.2]
H(2)S + 3 NADP(+) + 3 H(2)O = sulfite + 3 NADPH.
  • The enzyme, which catalyzes the six-electron reduction of sulfite to sulfide, is involved in sulfate assimilation in bacteria and yeast.
  • Different from EC 1.8.99.5, which is involved in prokaryotic sulfur- based energy metabolism.
  • Formerly EC 1.8.99.1.
58 A0A061CS36 A0A087F9V6 A0A098FPD8 A0A0A1HU47 A0A0D6T0P8 A0A0E3H0L7 A0A0F7A367 A0A0H2ZA28 A0A0H3QYB5 A0A0M2RKG5
(48 more...)
Assimilatory sulfite reductase (ferredoxin). [EC: 1.8.7.1]
Hydrogen sulfide + 6 oxidized ferredoxin [iron-sulfur] cluster + 3 H(2)O = sulfite + 6 reduced ferredoxin [iron-sulfur] cluster + 6 H(+).
  • The enzyme participates in sulfate assimilation.
  • While it is usually found in cyanobacteria, plants and algae, it has also been reported in bacteria (cf. EC 1.8.1.2).
  • Formerly EC 1.8.99.1.
44 A0A081YFR4 A0A0A7Q1E4 A0A0B7D9A1 A0A0D0TIF3 A0A0F6UEA4 A0A0H2ZA28 A0A0H3QYB5 A0A0H3YUL8 A0A0N0GQR8 A0A0P1DDB5
(34 more...)
Ferredoxin--nitrite reductase. [EC: 1.7.7.1]
NH(3) + 2 H(2)O + 6 oxidized ferredoxin = nitrite + 6 reduced ferredoxin + 7 H(+).
    5 A0A0F7Y6Q2 G8Q6L2 Q1I872 W6VBX6 W6VLL3
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