Sulfur carrier protein TusA

UniProtKB accession:  P0A890

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UniProtKB description:  Sulfur carrier protein involved in sulfur trafficking in the cell. Part of a sulfur-relay system required for 2-thiolation during synthesis of 2-thiouridine of the modified wobble base 5-methylaminomethyl-2-thiouridine (mnm(5)s(2)U) in tRNA (PubMed:16387657). Interacts with IscS and stimulates its cysteine desulfurase activity (PubMed:16387657, PubMed:23281480). Accepts an activated sulfur from IscS, which is then transferred to TusD, and thus determines the direction of sulfur flow from IscS to 2-thiouridine formation (PubMed:16387657). Also appears to be involved in sulfur transfer for the biosynthesis of molybdopterin (PubMed:23281480). Seems to affect the stability of sigma-S, particularly during the logarithmic growth phase (PubMed:9555915).