>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=98.07  E-value=9.2e-06  Score=54.32  Aligned_cols=67  Identities=21%  Similarity=0.508  Sum_probs=49.9

Q ss_pred             EEECCCCHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCH----HHHHHHC-CCCCCEEE---EEEC-CEEEEEEECCCCC
Q ss_conf             987699702221346666542100012333226723265----7777623-15688799---9979-9898588748999
Q gi|254780822|r   25 DFWASWCRPCVKLSPIIDDIADELADKVKITKLDIEESS----EISTRYQ-ISSIPTLI---LFKD-GKVIDRMMPGASS   95 (107)
Q Consensus        25 ~f~a~wC~~C~~~~p~~~~l~~~~~~~i~~~~vd~d~~~----~l~~~~~-v~~~Pt~~---~~~~-g~~~~~~~~g~~~   95 (107)
T Consensus         4 vYt~~~Cp~C~~aK~yL~~~------gv~f~~~dV~~d~~A~~~~~k~~gG~~gVPv~vsGdi--~~~~i~----~GF-~   70 (79)
T TIGR02196         4 VYTTPWCPPCKKAKEYLTSK------GVAFEEIDVEKDSAAREELLKKLGGQRGVPVIVSGDI--GTHKII----VGF-D   70 (79)
T ss_pred             EEEECCCCCHHHHHHHHHHC------CCCEEEECCCCCHHHHHHHHHHHCCCCCCCEEEECCC--CCCEEE----EEC-C
T ss_conf             87408982078999999954------9945763433697889999998389854555763423--797248----706-9


Q ss_pred             HHHHHHHHH
Q ss_conf             899999998
Q gi|254780822|r   96 QSDIIEWIL  104 (107)
Q Consensus        96 ~~~l~~~i~  104 (107)
T Consensus        71 ~~kld~~l~   79 (79)
T TIGR02196        71 PEKLDKLLE   79 (79)
T ss_pred             HHHHHHHCC
T ss_conf             799999709