>TIGR01292 TRX_reduct thioredoxin-disulfide reductase; InterPro: IPR005982 Reactive oxygen species (ROS) are known mediators of intracellular signaling cascades. Excessive production of ROS may, however, lead to oxidative stress, loss of cell function, and ultimately apoptosis or necrosis. A balance between oxidant and antioxidant intracellular systems is hence vital for cell function, regulation, and adaptation to diverse growth conditions. Thioredoxin reductase in conjunction with thioredoxin is a ubiquitous oxidoreductase system with antioxidant and redox regulatory roles. Thioredoxin reductase (1.8.1.9 from EC) reduces oxidised thioredoxin in the presence of NADPH. Reduced thioredoxin serves as an electron donor for thioredoxin peroxidase which consequently reduces H_2O_2 to H_2O. In mammals, extracellular forms of Trx also have cytokine-like effects. Mammalian TrxR has a highly reactive active site selenocysteine residue resulting in a profound reductive capacity, reducing several substrates in addition to Trx .; GO: 0004791 thioredoxin-disulfide reductase activity, 0019430 removal of superoxide radicals, 0005737 cytoplasm.

Probab=97.91 E-value=4.4e-05 Score=48.30 Aligned_cols=103 Identities=20% Similarity=0.297 Sum_probs=74.1 Q ss_pred CCCEEEEECCCHHHHHHHHHHHHCCCCEEEEECCCCCCEEEEECCCCCCCCCCCCCCHHHHHHHHHHHHHHCCCCCCCE- Q ss_conf 6751999989777999999999869959999678877568750100787747777897899986643232002322211- Q gi|254780283|r 4 HDSKILIIGSGPAGYTAAIYAARAMLKPVIIAGSDLGGQLMITESIENYPGFATSIRGDWLMEQMRQQAENFGTKIIQD- 82 (321) Q Consensus 4 ~~~dVvIIG~GpAGl~aA~~l~r~g~~v~iie~~~~GG~l~~~~~i~n~~g~~~~~~~~~l~~~~~~~~~~~~v~~~~~- 82 (321) T Consensus 150 k~K~V~VvGGGdsA~eEA~yL~~~a~kV~lvHRRd~---------------fRA~---k~~~~r~~~~~e-G~I~~l~n~ 210 (321) T TIGR01292 150 KNKEVAVVGGGDSALEEALYLTRIAKKVTLVHRRDK---------------FRAE---KILLDRLKKNPE-GKIEFLWNS 210 (321) T ss_pred CCCEEEEECCCCHHHHHHHHHHHCCCEEEEEECCCC---------------CCCC---HHHHHHHHHCCC-CCEEEECCC T ss_conf 598899987982488888999853876799977986---------------3632---899989983789-878996486 Q ss_pred EEEECCCCC--CCCCCC-----CCCCCCCCCCEECCCCCCCCEEEEECCC Q ss_conf 332011222--222222-----2222222100001477664202465277 Q gi|254780283|r 83 LVVSVDLDR--HPFLVE-----TQSGDLWHADAVVIATGSEVKWLRLESE 125 (321) Q Consensus 83 ~V~~i~~~~--~~~~v~-----~~~g~~~~a~~lIiAtG~~~~~~~ipG~ 125 (321) T Consensus 211 ~v~Ei~G~~~~~V~~v~i~N~~t~e~~~l~vdGvF~aIG~~P~t~~~~~~ 260 (321) T TIGR01292 211 TVEEIVGDNSKKVESVKIKNTVTGEEEELKVDGVFIAIGHEPNTELLKGL 260 (321) T ss_pred EEEEEECCCCEEEEEEEEEECCCCEEEEEEECEEEEEECCCCCHHHHHCC T ss_conf 89999617831553358996238848899844478984120320576507

HHsearch alignment for GI: 254780283 and conserved domain: TIGR01292