1.8.1.2: assimilatory sulfite reductase (NADPH)

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For detailed information about assimilatory sulfite reductase (NADPH), go to the full flat file.

Word Map on EC 1.8.1.2

1.8.1.2

sulfur

siroheme

dissimilatory

hemoprotein

desulfovibrio

sulfate-reducing

thiosulfate

six-electron

desulfoviridin

o-acetylserine

sulfhydrylase

dsrab

sulfurylase

5'-phosphosulfate

hildenborough

ferredoxin-dependent

o-acetyl-l-serine

exchange-coupled

desulfotomaculum

brewing

nutrition

medicine

synthesis

Reaction

+ 3 NADP⁺ + 3 H2O =

+ 3 NADPH + 3 H+

Synonyms

CNG03990, coenzyme F420-dependent sulfite reductase, CysI, CysIJ, desulforubidin, EC 1.8.99.1, Fsr, H2S-NADP oxidoreductase, MET10, NADPH-dependent assimilatory sulfite reductase, NADPH-dependent sulfite reductase, NADPH-sulfite reductase, reductase, sulfite (reduced nicotinamide adenine dinucleotide phosphate), SIR, SIR-FP, SIR-HP, SiR/SiRHP, SIRHP, sulfite reductase, sulfite reductase hemo-subunit

ECTree

1 Oxidoreductases

1.8 Acting on a sulfur group of donors

1.8.1 With NAD⁺ or NADP⁺ as acceptor

1.8.1.2 assimilatory sulfite reductase (NADPH)

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Results	in table
1	Activating Compound
12003	AA Sequence
5	Application
1	CAS Registry Number
9	Cloned(Commentary)
31	Cofactor
8	Crystallization (Commentary)
7	General Information
3	General Stability
75	Inhibitors
3	Ki Value [mM]
31	KM Value [mM]
2	Localization
4	Metals/Ions
20	Molecular Weight [Da]
13	Natural Substrates/ Products (Substrates)
2	Organic Solvent Stability
60	Organism
7	Pathway
24	PDB ID
11	pH Optimum
1	pH Range
1	pH Stability
25	Protein Variants
16	Purification (Commentary)
6	Reaction
9	Reaction Type
60	Reference
1	Renatured (Commentary)
9	Specific Activity [micromol/min/mg]
8	Storage Stability
80	Substrates and Products (Substrate)
21	Subunits
40	Synonyms
1	Systematic Name
2	Temperature Optimum [°C]
3	Temperature Stability [°C]
18	Turnover Number [1/s]

Systematic Name

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Systematic Name on EC 1.8.1.2 - assimilatory sulfite reductase (NADPH)

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hydrogen-sulfide:NADP+ oxidoreductase

Contains siroheme, [4Fe-4S] cluster, FAD and FMN. The enzyme, which catalyses the six-electron reduction of sulfite to sulfide, is involved in sulfate assimilation in bacteria and yeast. Different from EC 1.8.99.5, dissimilatory sulfite reductase, which is involved in prokaryotic sulfur-based energy metabolism. cf. EC 1.8.7.1, assimilatory sulfite reductase (ferredoxin).