>TIGR02196 GlrX_YruB Glutaredoxin-like protein, YruB-family; InterPro: IPR011911 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 glutaredoxin-like protein family contains the conserved CxxC motif and includes the Clostridium pasteurianum protein YruB which has been cloned from a rubredoxin operon . Somewhat related to NrdH, it is unknown whether this protein actually interacts with glutathione/glutathione reducatase, or, like NrdH, some other reductant system..

Probab=99.51  E-value=3e-14  Score=103.94  Aligned_cols=65  Identities=28%  Similarity=0.429  Sum_probs=60.8

Q ss_pred             CEEEEECCCCCCCCCCHHHHHHHHHHHCCCCEEEEECCCCHHHHHHHHHHHC-CCCCCEEE---EC-CEEECCHH
Q ss_conf             9799944899989983179999999974996589971144037999999734-78776389---89-98942769
Q gi|254780968|r   17 DVVLFMKGTPTSPRCGFSGKVVQVLDSLGVSYKGIDVLADDALRQSIKEYSN-WPTIPQLY---VK-GDFIGGCD   86 (106)
Q Consensus        17 ~Vvifskgt~~~p~C~~c~~ak~lL~~~~i~y~~~dv~~d~~~~~~l~~~sg-~~TvPqIF---v~-G~~IGG~d   86 (106)
T Consensus         1 ~V~vYt-----~~~Cp~C~~aK~yL~~~gv~f~~~dV~~d~~A~~~~~k~~gG~~gVPv~vsGdi~~~~i~~GF~   70 (79)
T TIGR02196         1 KVKVYT-----TPWCPPCKKAKEYLTSKGVAFEEIDVEKDSAAREELLKKLGGQRGVPVIVSGDIGTHKIIVGFD   70 (79)
T ss_pred             CEEEEE-----ECCCCCHHHHHHHHHHCCCCEEEECCCCCHHHHHHHHHHHCCCCCCCEEEECCCCCCEEEEECC
T ss_conf             906874-----0898207899999995499457634336978899999983898545557634237972487069