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sulfite reductase
Crystallographic structure of sulfite reductase from E. coli.[1]
Identifiers
EC no.
1.8.99.1
CAS no.
37256-51-2
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Sulfite reductases (EC 1.8.99.1) are enzymes that participate in sulfur metabolism.[2] They catalyze the reduction of sulfite to hydrogen sulfide and water.[2][3] Electrons for the reaction are provided by a dissociable molecule of either NADPH, bound flavins, or ferredoxins.[4]
Sulfite reductases, which belong to the oxidoreductase family, are found in the archaea, bacteria, fungi, and plants.[5][6][7] They are grouped as either the assimilatory or the dissimilatory sulfite reductases depending on their function, their spectroscopic properties, and their catalytic properties. This enzyme participates in selenoamino acid metabolism and sulfur assimilation. It employs two covalently coupled cofactors - an iron sulfur cluster and a siroheme - which the deliver electrons to the substrate via this coupling.[8]
The systematic name of this enzyme class is hydrogen-sulfide:acceptor oxidoreductase. Other names in common use include assimilatory sulfite reductase, assimilatory-type sulfite reductase, and hydrogen-sulfide:(acceptor) oxidoreductase.
^PDB: 1AOP; Crane BR, Siegel LM, Getzoff ED (October 1995). "Sulfite reductase structure at 1.6 A: evolution and catalysis for reduction of inorganic anions". Science. 270 (5233): 59–67. Bibcode:1995Sci...270...59C. doi:10.1126/science.270.5233.59. PMID 7569952. S2CID 31246227.
^ abParey K, Warkentin E, Kroneck PM, Ermler U (October 2010). "Reaction cycle of the dissimilatory sulfite reductase from Archaeoglobus fulgidus". Biochemistry. 49 (41): 8912–21. doi:10.1021/bi100781f. PMID 20822098.
^Pinto R, Harrison JS, Hsu T, Jacobs WR, Leyh TS (September 2007). "Sulfite reduction in mycobacteria". Journal of Bacteriology. 189 (18): 6714–22. doi:10.1128/JB.00487-07. PMC 2045171. PMID 17644602.
^Siegel LM, Murphy MJ, Kamin H (January 1973). "Reduced nicotinamide adenine dinucleotide phosphate-sulfite reductase of enterobacteria. I. The Escherichia coli hemoflavoprotein: molecular parameters and prosthetic groups". The Journal of Biological Chemistry. 248 (1): 251–64. doi:10.1016/S0021-9258(19)44469-4. PMID 4144254.
^Brychkova G, Yarmolinsky D, Ventura Y, Sagi M (August 2012). "A novel in-gel assay and an improved kinetic assay for determining in vitro sulfite reductase activity in plants". Plant & Cell Physiology. 53 (8): 1507–16. doi:10.1093/pcp/pcs084. PMID 22685081.
^Yarmolinsky D, Brychkova G, Kurmanbayeva A, Bekturova A, Ventura Y, Khozin-Goldberg I, Eppel A, Fluhr R, Sagi M (August 2014). "Impairment in Sulfite Reductase Leads to Early Leaf Senescence in Tomato Plants". Plant Physiology. 165 (4): 1505–1520. doi:10.1104/pp.114.241356. PMC 4119034. PMID 24987017.
^Schnell R, Sandalova T, Hellman U, Lindqvist Y, Schneider G (July 2005). "Siroheme- and [Fe4-S4]-dependent NirA from Mycobacterium tuberculosis is a sulfite reductase with a covalent Cys-Tyr bond in the active site". The Journal of Biological Chemistry. 280 (29): 27319–28. doi:10.1074/jbc.M502560200. PMID 15917234.
^Crane BR, Getzoff ED (December 1996). "The relationship between structure and function for the sulfite reductases". Current Opinion in Structural Biology. 6 (6): 744–56. doi:10.1016/S0959-440X(96)80003-0. PMID 8994874.
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cofactor at the active site of sulfitereductase, which plays a major role in sulfur assimilation pathway, converting sulfite into sulfide, which can be incorporated...
steps in sulfur reduction. Subsequently, APS is reduced to sulfite, catalyzed by APS reductase with likely glutathione as reductant. The latter reaction...
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source of nitrogen in fertilized soils. Eukaryotic nitrate reductases are part of the sulfite oxidase family of molybdoenzymes. They transfer electrons...
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Life Genbank entry for its dissimilatory sulfitereductase alpha subunit (dsrA) and dissimilatory sulfitereductase beta subunit (dsrB) genes Type strain...
biosynthesis of sirohaem, the iron-containing prosthetic group in sulfitereductase enzymes. It is also the biosynthetic precursor to cofactor F430, an...
oxotransferases that also includes DMSO reductase, xanthine oxidase, and nitrite reductase. In mammals, the expression levels of sulfite oxidase is high in the liver...
MJ (1989). "Characterization of the flavoprotein moieties of NADPH-sulfitereductase from Salmonella typhimurium and Escherichia coli. Physicochemical...
is precursor to sirohaem, the iron-containing prosthetic group in sulfitereductase enzymes. Further biosynthetic transformations convert sirohydrochlorin...
reactions. Enzymes in this family include DMSO reductase, xanthine oxidase, nitrite reductase, and sulfite oxidase. Bioinorganic chemistry * Stephen J....
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enzyme class is sulfite:ferricytochrome-c oxidoreductase. Other names in common use include sulfite cytochrome c reductase, sulfite-cytochrome c oxidoreductase...
reductases are a class of enzymes involved in reductive sulfur assimilation. This reaction consists of a conversion from activated sulfate to sulfite...
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