>TIGR02183 GRXA Glutaredoxin, GrxA family; InterPro: IPR011902 Glutaredoxins , , , also known as thioltransferases (disulphide reductases, are small proteins of approximately one hundred amino-acid residues which utilise glutathione and NADPH as cofactors. Oxidized glutathione is regenerated by glutathione reductase. Together these components compose the glutathione system . Glutaredoxin functions as an electron carrier in the glutathione-dependent synthesis of deoxyribonucleotides by the enzyme ribonucleotide reductase. Like thioredoxin, which functions in a similar way, glutaredoxin possesses an active centre disulphide bond . It exists in either a reduced or an oxidized form where the two cysteine residues are linked in an intramolecular disulphide bond. Glutaredoxin has been sequenced in a variety of species. On the basis of extensive sequence similarity, it has been proposed that Vaccinia virus protein O2L is most probably a glutaredoxin. Finally, it must be noted that Bacteriophage T4 thioredoxin seems also to be evolutionary related. In position 5 of the pattern T4 thioredoxin has Val instead of Pro. This entry includes the Escherichia coli glyutaredoxin GrxA which appears to have primary responsibility for the reduction of ribonucleotide reductase .; GO: 0009055 electron carrier activity, 0015035 protein disulfide oxidoreductase activity, 0045454 cell redox homeostasis.

Probab=99.41  E-value=1.7e-13  Score=99.57  Aligned_cols=74  Identities=24%  Similarity=0.533  Sum_probs=62.9

Q ss_pred             EEEEECCCCCCCCCCHHHHHHHHHHHC-----CCCEEEEECCCCHHHHHHHHHHHCCC--CCCEEEECCEEECCHHHHHH
Q ss_conf             799944899989983179999999974-----99658997114403799999973478--77638989989427699999
Q gi|254780968|r   18 VVLFMKGTPTSPRCGFSGKVVQVLDSL-----GVSYKGIDVLADDALRQSIKEYSNWP--TIPQLYVKGDFIGGCDIVCE   90 (106)
Q Consensus        18 Vvifskgt~~~p~C~~c~~ak~lL~~~-----~i~y~~~dv~~d~~~~~~l~~~sg~~--TvPqIFv~G~~IGG~d~l~~   90 (106)
T Consensus         2 v~IfG-----r~gC~YCVRA~~LaEkl~~~~~DF~fry~Di~AEGI~K~DL~~~VGKpVeTVPQIF~D~~~vGGCTdF~~   76 (86)
T TIGR02183         2 VVIFG-----RPGCPYCVRAKQLAEKLAEELADFEFRYIDIHAEGISKADLEKTVGKPVETVPQIFVDEKHVGGCTDFEQ   76 (86)
T ss_pred             EEEEC-----CCCCCHHHHHHHHHHHHHHHCCCCCCEEEEEEECCCCHHHHCCCCCCCCCCCCCEEEECCCCCCCCCHHH
T ss_conf             57732-----7998402336888999886403556205888745887122103378841566741540777688521788


Q ss_pred             HHHCCC
Q ss_conf             998899
Q gi|254780968|r   91 MFESGE   96 (106)
Q Consensus        91 l~~~G~   96 (106)
T Consensus        77 ~~k~~~   82 (86)
T TIGR02183        77 LVKEKF   82 (86)
T ss_pred             HHHHHH
T ss_conf             988740