>cd02977 ArsC_family Arsenate Reductase (ArsC) family; composed of TRX-fold arsenic reductases and similar proteins including the transcriptional regulator, Spx. ArsC catalyzes the reduction of arsenate [As(V)] to arsenite [As(III)], using reducing equivalents derived from glutathione (GSH) via glutaredoxin (GRX), through a single catalytic cysteine. 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. Spx is a general regulator that exerts negative and positive control over transcription initiation by binding to the C-terminal domain of the alpha subunit of RNA polymerase.

Probab=94.06  E-value=0.092  Score=29.40  Aligned_cols=33  Identities=24%  Similarity=0.253  Sum_probs=29.7

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~~~~Cs~~rka~~~L~~~~i~~~~~d~~k   33 (105)
T cd02977           1 ITIYGNPNCSTSRKALAWLEEHGIEYEFIDYLK   33 (105)
T ss_pred             CEEEECCCCHHHHHHHHHHHHCCCCCEEEHHHH
T ss_conf             989727998789999999985799738860432