>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=97.93  E-value=8.3e-06  Score=52.63  Aligned_cols=63  Identities=16%  Similarity=0.172  Sum_probs=51.0

Q ss_pred             CCCCCCCCCCHHHHHHHHHHHHCCCCEEEEECCCCCC-CHHHHHHCC-CCCCCHHH---HCCHHHHCC
Q ss_conf             9521358998689999999998699829998886777-889998556-87752011---100011101
Q gi|254780594|r    1 MSILYHYPLSSSSRFIRLILSEYEFTTDMIEEFPWGK-RREFLELNP-SGTLPVYI---DEHMQALCG   63 (230)
Q Consensus         1 M~~LY~~~~sp~~~kvr~~L~e~gi~y~~~~~~~~~~-~~~~~~lnP-~g~vP~L~---~~dg~~l~e   63 (230)
T Consensus         1 ~V~vYt~~~Cp~C~~aK~yL~~~gv~f~~~dV~~d~~A~~~~~k~~gG~~gVPv~vsGdi~~~~i~~G   68 (79)
T TIGR02196         1 KVKVYTTPWCPPCKKAKEYLTSKGVAFEEIDVEKDSAAREELLKKLGGQRGVPVIVSGDIGTHKIIVG   68 (79)
T ss_pred             CEEEEEECCCCCHHHHHHHHHHCCCCEEEECCCCCHHHHHHHHHHHCCCCCCCEEEECCCCCCEEEEE
T ss_conf             90687408982078999999954994576343369788999999838985455576342379724870