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Gene Review

sufS  -  cysteine desulfurase, stimulated by SufE;...

Escherichia coli str. K-12 substr. MG1655

Synonyms: ECK1676, JW1670, csdB, ynhB
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Disease relevance of sufS


High impact information on sufS

  • Although the enzyme was not specific for L-selenocysteine, the high specific activity for L-selenocysteine (5.5 units/mg compared with 0.019 units/mg for L-cysteine) supports the view that the enzyme can be regarded as an E. coli counterpart of mammalian selenocysteine lyase [3].
  • An open reading frame, named csdB, from Escherichia coli encodes a putative protein that is similar to selenocysteine lyase of pig liver and cysteine desulfurase (NifS) of Azotobacter vinelandii [3].
  • Selenocysteine lyase is a pyridoxal 5'-phosphate (PLP)-dependent enzyme that catalyzes the exclusive decomposition of L-selenocysteine to L-alanine and elemental selenium [3].
  • External suppressors, sufS, of a -1 frameshift mutant cause ribosomes to shift into the -1 frame when reading the sequence CAG GGA GUG [4].
  • After overcoming terminological complications to sort out microbial nifS from sufS genes, we connect a bacterial operon, recently found to be involved in iron metabolism, the formation of [Fe-S] clusters and oxidative stress to a potentially important gene (sufB) carried on the degenerate plastid genome of malaria and related parasites [5].

Chemical compound and disease context of sufS


Biological context of sufS


Associations of sufS with chemical compounds

  • Selenocysteine lyase enzymes, which decompose selenocysteine to elemental selenium (Se(0)) and alanine, were considered as candidates for the control of free selenium levels in vivo [7].


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