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Literature summary for 1.8.1.2 extracted from

  • Yoshimoto, A.; Sato, R.
    Studies on yeast sulfite reductase. I. Purification and characterization (1968), Biochim. Biophys. Acta, 153, 555-575.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
2'-AMP NADPH-sulfite reductase and NADPH-cytochrome c reductase Saccharomyces cerevisiae
arsenite
-
Saccharomyces cerevisiae
CN- only when added with NADPH prior to substrate, sulfite prevents NADPH-reduced form from irreversible conversion by CN-; severe inhibition of NADPH-sulfite,-nitrite,-hydroxylamine reductase, no inhibition of methyl viologen-sulfite reductase, small extent of inhibition of NADPH dependent reduction of cytochrome c, ferricyanide, quinones etc. Saccharomyces cerevisiae
NADP+ NADPH-dependent activities Saccharomyces cerevisiae
p-chloromercuribenzoate NADPH-dependent activities Saccharomyces cerevisiae

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.012 0.017 sulfite
-
Saccharomyces cerevisiae
0.8 1.5 nitrite
-
Saccharomyces cerevisiae
4.5 10.5 hydroxylamine
-
Saccharomyces cerevisiae

Localization

Localization Comment Organism GeneOntology No. Textmining
soluble
-
Saccharomyces cerevisiae
-
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
350000
-
calculation from FAD and FMN content, sedimentation coefficient Saccharomyces cerevisiae

Organism

Organism UniProt Comment Textmining
Saccharomyces cerevisiae
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Saccharomyces cerevisiae

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
1.85
-
-
Saccharomyces cerevisiae

Storage Stability

Storage Stability Organism
-20°C, 0.3 M phosphate buffer pH 7.3, 1 year stable stable Saccharomyces cerevisiae
4°C, 0.3 M phosphate buffer pH 7.3, 1 week stable Saccharomyces cerevisiae

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
hydroxylamine + NADPH
-
Saccharomyces cerevisiae ammonia + NADP+
-
?
additional information reactions catalyzed by flavoprotein subunit alone: transfer of electrons from NADPH to cytochrome c, ferricyanide, dichlorphenolindophenol, menadione, FMN, FAD, O2 Saccharomyces cerevisiae ?
-
?
nitrite + NADPH
-
Saccharomyces cerevisiae ammonia + NADP+
-
?
sulfite + NADPH NADPH can be replaced by reduced methyl viologen Saccharomyces cerevisiae sulfide + NADP+ + H2O
-
?
sulfite + NADPH benzyl viologen Saccharomyces cerevisiae sulfide + NADP+ + H2O
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7 7.5 NADPH-sulfite reductase Saccharomyces cerevisiae
7.5 7.9 NADPH-cytochrome c reductase Saccharomyces cerevisiae