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Enzyme Nomenclature
Information on EC 1.8.99.1 - sulfite reductase
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The enzyme appears in viruses and cellular organisms
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EC NUMBER 
COMMENTARY 
1.8.99.1
deleted entry. Now covered by EC 1.8.1.2, assimilatory sulfite reductase (NADPH) and EC 1.8.7.1, assimilatory sulfite reductase (ferredoxin).
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RECOMMENDED NAME
GeneOntology No.
sulfite reductase
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GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
malfunction
metabolism
-
sulfur globule oxidation is strictly dependent on the dissimilatory sulfite reductase (DSR). The DSR system is dispensable in environments with sufficiently high sulfide concentrations
physiological function
malfunction
-
dissimilatory sulfite reductase mutants incapable of complete substrate oxidation oxidize sulfide and thiosulfate about twice as fast as the wild type, while having only slightly lower growth rates (70-80% of wild type)
malfunction
-
enzyme downregulation causes severe adaptive reactions of primary and secondary metabolism. Seedlings with 14% transcript levels compared with the wild type are early seedling lethal, while seedlings having 44% transcript levels are viable but strongly retarded in growth. Enzyme downregulation result in a higher sensitivity toward cadmium (2.6fold)
physiological function
-
the enzyme catalyzes the terminal step in the reduction of sulfate to sulfide
physiological function
-
optimal enzyme activity is essential for normal development growth
physiological function
-
the enzyme catalyzes the terminal step in the reduction of sulfate to sulfide
-
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LINKS TO OTHER DATABASES (specific for EC-Number 1.8.99.1)
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