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CATH Superfamily 3.30.413.10

Sulfite Reductase Hemoprotein, domain 1

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 4990: Assimilatory nitrite reductase (Ferredoxin)

There are 4 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
Ferredoxin--nitrite reductase. [EC: 1.7.7.1]
NH(3) + 2 H(2)O + 6 oxidized ferredoxin = nitrite + 6 reduced ferredoxin + 7 H(+).
    		 134 A0A023P4I3 A0A068MZE0 A0A073CIF1 A0A0A1VWT6 A0A0B5QVC4 A0A0C1NFT0 A0A0C1Y5U5 A0A0C2KSV2 A0A0C2QF90 A0A0D8ZWF0
    (124 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.
    		 52 A0A023P4I3 A0A068N527 A0A0D6T7W8 A0A0E8TII0 A0A0F5RTP1 A0A0F6JCI9 A0A0G8CC33 A0A0G8FDK5 A0A0J7DLC7 A0A0J7GQX1
    (42 more...)
    Nitrite reductase (NAD(P)H). [EC: 1.7.1.4]
    Ammonia + 3 NAD(P)(+) + 2 H(2)O = nitrite + 3 NAD(P)H.
    • The enzymes from the fungi Neurospora crassa, Emericella nidulans and Candida nitratophila and the bacterium Aliivibrio fischeri can use either NADPH or NADH as electron donor.
    • Cf. EC 1.7.1.15.
    • Formerly EC 1.6.6.4.
    		 3 A0A150DQL9 A0A1J9Y6M4 Q73B73
    Precorrin-3B synthase. [EC: 1.14.13.83]
    Precorrin-3A + NADH + O(2) = precorrin-3B + NAD(+) + H(2)O.
    • An oxygen atom from dioxygen is incorporated into the macrocycle at C-20.
    • In the aerobic cobalamin biosynthesis pathway, four enzymes are involved in the conversion of precorrin-3A to precorrin-6A.
    • This enzyme carries out the first of the four steps, yielding precorrin-3B as the product.
    • This is followed by three methylation reactions, which introduce a methyl group at C-17 (CobJ; EC 2.1.1.131), C-11 (CobM; 2.1.1.133) and C-1 (CobF; EC 2.1.1.152) of the macrocycle, giving rise to precorrin- 4, precorrin-5 and precorrin-6A, respectively.
    		 1 U7QAD1
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