>cd03034 ArsC_ArsC Arsenate Reductase (ArsC) family, ArsC subfamily; arsenic reductases similar to that encoded by arsC on the R733 plasmid of Escherichia coli. E. coli ArsC catalyzes the reduction of arsenate [As(V)] to arsenite [As(III)], the first step in the detoxification of arsenic, using reducing equivalents derived from glutathione (GSH) via glutaredoxin (GRX). ArsC contains a single catalytic cysteine, within a thioredoxin fold, that forms a covalent thiolate-As(V) intermediate, which is reduced by GRX through a mixed GSH-arsenate intermediate. This family of predominantly bacterial enzymes is unrelated to two other families of arsenate reductases which show similarity to low-molecular-weight acid phosphatases and phosphotyrosyl phosphatases.

Probab=95.02  E-value=0.053  Score=30.77  Aligned_cols=33  Identities=27%  Similarity=0.399  Sum_probs=30.0

Q ss_pred             CCCCCCCCCHHHHHHHHHHHHCCCCEEEEECCC
Q ss_conf             521358998689999999998699829998886
Q gi|254780594|r    2 SILYHYPLSSSSRFIRLILSEYEFTTDMIEEFP   34 (230)
Q Consensus         2 ~~LY~~~~sp~~~kvr~~L~e~gi~y~~~~~~~   34 (230)
T Consensus         1 i~iY~~p~Cst~rka~~~L~~~~i~~~~idy~~   33 (112)
T cd03034           1 ITIYHNPRCSKSRNALALLEEAGIEPEIVEYLK   33 (112)
T ss_pred             CEEEECCCCHHHHHHHHHHHHCCCCCEEEECCC
T ss_conf             989867998889999999998799848985014