>TIGR02181 GRX_bact glutaredoxin 3; InterPro: IPR011900 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 family of glutaredoxins includes the E. coli protein GrxC (Grx3) which appears to have a secondary role in reducing ribonucleotide reductase (in the absence of GrxA) possibly indicating a role in the reduction of other protein disulphides .; GO: 0006118 electron transport, 0045454 cell redox homeostasis.

Probab=99.96  E-value=1.7e-29  Score=192.13  Aligned_cols=79  Identities=32%  Similarity=0.641  Sum_probs=75.7

Q ss_pred             EEEEECCCCCCCCCCHHHHHHHHHHHCCC-CEEEEECCCCH-HHHHHHHHHH-CCCCCCEEEECCEEECCHHHHHHHHHC
Q ss_conf             79994489998998317999999997499-65899711440-3799999973-478776389899894276999999988
Q gi|254780968|r   18 VVLFMKGTPTSPRCGFSGKVVQVLDSLGV-SYKGIDVLADD-ALRQSIKEYS-NWPTIPQLYVKGDFIGGCDIVCEMFES   94 (106)
Q Consensus        18 Vvifskgt~~~p~C~~c~~ak~lL~~~~i-~y~~~dv~~d~-~~~~~l~~~s-g~~TvPqIFv~G~~IGG~d~l~~l~~~   94 (106)
T Consensus         1 V~iYT~-----~~CPYC~rAK~LL~~kGv~~~~Ei~vd~dpD~~r~eM~~Rs~Gr~TVPQIFIg~~HVGGcDDL~~L~r~   75 (82)
T TIGR02181         1 VTIYTK-----PYCPYCSRAKALLESKGVGTFTEIRVDGDPDALRDEMMQRSGGRRTVPQIFIGDVHVGGCDDLYALDRE   75 (82)
T ss_pred             CEEECC-----CCCCCCHHHHHHHHHCCCCCCEEEECCCCCCHHHHHHHHHHCCCCCCCEEEECCCCCCCCHHHHHHHHC
T ss_conf             946315-----998802688999985698863034457981068899999828994043376299024543799998633


Q ss_pred             CCHHHHH
Q ss_conf             9978998
Q gi|254780968|r   95 GELHEIL  101 (106)
Q Consensus        95 G~L~~ll  101 (106)
T Consensus        76 G~Ld~LL   82 (82)
T TIGR02181        76 GKLDPLL   82 (82)
T ss_pred             CCCCCCC
T ss_conf             7854569