Protein Family Models

DsrE is a small soluble protein involved in intracellular sulfur reduction [1]. This family also includes DsrF and the homologues TusD/C. n E. coli, the DsrEFH homologue TusBCD interacts with the DsrC homologue TusE in a sulfur relay system during 2-thiouridine biosynthesis [2]. [1]. 9695921. Sirohaem sulfite reductase and other proteins encoded by genes at the dsr locus of Chromatium vinosum are involved in the oxidation of intracellular sulfur. Pott AS, Dahl C;. Microbiology 1998;144:1881-1894. [2]. 16387657. Mechanistic insights into sulfur relay by multiple sulfur mediators involved in thiouridine biosynthesis at tRNA wobble positions. Ikeuchi Y, Shigi N, Kato J, Nishimura A, Suzuki T;. Mol Cell. 2006;21:97-108. (from Pfam)

Date:

2024-10-16

sulfurtransferase TusC/DsrF is part of a sulfur-relay system required for 2-thiolation of 5-methylaminomethyl-2-thiouridine (mnm(5)s(2)U) at tRNA wobble positions; it accepts sulfur from TusA and transfers it in turn to TusE

Date:

2015-09-01

The TusBCD complex is involved in sulfur related that results in thiouridation to U34 position in some tRNAs

Gene:

tusC

Date:

2020-10-26

The three proteins TusB, TusC, and TusD form a heterohexamer responsible for a sulfur relay reaction. In large numbers of proteobacterial species, this complex acts on a Cys-derived persulfide moiety, delivered by the cysteine desulfurase IscS to TusA, then to TusBCD. The activated sulfur group is then transferred to TusE (DsrC), then by MnmA (TrmU) for modification of an anticodon nucleotide in tRNAs for Glu, Lys, and Gln. The sulfur relay complex TusBCD is also found, under the designation DsrEFH, in phototrophic and chemotrophic sulfur bacteria, such as Chromatium vinosum. In these organisms, it seems the primary purpose is related to sulfur flux, such as oxidation from sulfide to molecular sulfur to sulfate.

Gene:

tusC

Date:

2019-09-10