EC 1.8.7.1: Assimilatory sulfite reductase (ferredoxin)
Reaction catalysed:
Hydrogen sulfide + 6 oxidized ferredoxin [iron-sulfur] cluster + 3 H(2)O = sulfite + 6 reduced ferredoxin [iron-sulfur] cluster + 6 H(+)
Systematic name:
Hydrogen-sulfide:ferredoxin oxidoreductase
Alternative Name(s):
- Ferredoxin-sulfite reductase
- SIR (gene name)
- Sulfite reductase (ferredoxin)
GO terms
Biochemical function:
Biological process:
Cellular component:
Sequence families
Protein families (Pfam)
![The deposited structure of PDB entry 1zj9 contains 4 copies of Pfam domain PF01077 (Nitrite and sulphite reductase 4Fe-4S domain) in Sulfite reductase [ferredoxin]. Showing 2 copies in chain A.](https://www.ebi.ac.uk/pdbe/static/entry/1zj9_1_A_Pfam_PF01077_image-200x200.png "The deposited structure of PDB entry <span class='highlight'>1zj9</span> contains 4 copies of Pfam domain <span class='highlight'>PF01077 (Nitrite and sulphite reductase 4Fe-4S domain)</span> in <span class='highlight'>Sulfite reductase [ferredoxin]</span>. Showing 2 copies in chain <span class='highlight'>A</span>.")
![The deposited structure of PDB entry 1zj9 contains 4 copies of Pfam domain PF03460 (Nitrite/Sulfite reductase ferredoxin-like half domain) in Sulfite reductase [ferredoxin]. Showing 2 copies in chain A.](https://www.ebi.ac.uk/pdbe/static/entry/1zj9_1_A_Pfam_PF03460_image-200x200.png "The deposited structure of PDB entry <span class='highlight'>1zj9</span> contains 4 copies of Pfam domain <span class='highlight'>PF03460 (Nitrite/Sulfite reductase ferredoxin-like half domain)</span> in <span class='highlight'>Sulfite reductase [ferredoxin]</span>. Showing 2 copies in chain <span class='highlight'>A</span>.")
InterPro annotations
IPR006066
Domain description:
Nitrite/sulphite reductase iron-sulphur/sirohaem-binding site
Occurring in:
Occurring in:
IPR045854
Domain description:
Nitrite and sulphite reductase 4Fe-4S domain-like superfamily
Occurring in:
Occurring in:
Structure domains
CATH domains
3.30.413.10
Class:
Alpha Beta
Architecture:
2-Layer Sandwich
Topology:
Sulfite Reductase Hemoprotein; domain 1
Homology:
Sulfite Reductase Hemoprotein, domain 1
Occurring in:
![The deposited structure of PDB entry 1zj9 contains 4 copies of CATH domain 3.30.413.10 (Sulfite Reductase Hemoprotein; domain 1) in Sulfite reductase [ferredoxin]. Showing 2 copies in chain A.](https://www.ebi.ac.uk/pdbe/static/entry/1zj9_1_A_CATH_3.30.413.10_image-200x200.png "The deposited structure of PDB entry <span class='highlight'>1zj9</span> contains 4 copies of CATH domain <span class='highlight'>3.30.413.10 (Sulfite Reductase Hemoprotein; domain 1)</span> in <span class='highlight'>Sulfite reductase [ferredoxin]</span>. Showing 2 copies in chain <span class='highlight'>A</span>.")
![The deposited structure of PDB entry 1zj9 contains 2 copies of CATH domain 3.90.480.10 (Sulfite Reductase Hemoprotein; domain 2) in Sulfite reductase [ferredoxin]. Showing 1 copy in chain A.](https://www.ebi.ac.uk/pdbe/static/entry/1zj9_1_A_CATH_3.90.480.10_image-200x200.png "The deposited structure of PDB entry <span class='highlight'>1zj9</span> contains 2 copies of CATH domain <span class='highlight'>3.90.480.10 (Sulfite Reductase Hemoprotein; domain 2)</span> in <span class='highlight'>Sulfite reductase [ferredoxin]</span>. Showing 1 copy in chain <span class='highlight'>A</span>.")
SCOP annotations
56015
Class:
Alpha and beta proteins (a+b)
Fold:
Nitrite and sulphite reductase 4Fe-4S domain-like
Superfamily:
Nitrite and sulphite reductase 4Fe-4S domain-like
Occurring in:
![The deposited structure of PDB entry 1zj9 contains 4 copies of SCOP domain 56015 (Nitrite and sulphite reductase 4Fe-4S domain-like) in Sulfite reductase [ferredoxin]. Showing 2 copies in chain A.](https://www.ebi.ac.uk/pdbe/static/entry/1zj9_1_A_SCOP_56015_image-200x200.png "The deposited structure of PDB entry <span class='highlight'>1zj9</span> contains 4 copies of SCOP domain <span class='highlight'>56015 (Nitrite and sulphite reductase 4Fe-4S domain-like)</span> in <span class='highlight'>Sulfite reductase [ferredoxin]</span>. Showing 2 copies in chain <span class='highlight'>A</span>.")
55125
Class:
Alpha and beta proteins (a+b)
Fold:
Ferredoxin-like
Superfamily:
Nitrite/Sulfite reductase N-terminal domain-like
Occurring in:
![The deposited structure of PDB entry 1zj9 contains 4 copies of SCOP domain 55125 (Duplicated SiR/NiR-like domains 1 and 3) in Sulfite reductase [ferredoxin]. Showing 2 copies in chain A.](https://www.ebi.ac.uk/pdbe/static/entry/1zj9_1_A_SCOP_55125_image-200x200.png "The deposited structure of PDB entry <span class='highlight'>1zj9</span> contains 4 copies of SCOP domain <span class='highlight'>55125 (Duplicated SiR/NiR-like domains 1 and 3)</span> in <span class='highlight'>Sulfite reductase [ferredoxin]</span>. Showing 2 copies in chain <span class='highlight'>A</span>.")