>cd02971 PRX_family Peroxiredoxin (PRX) family; composed of the different classes of PRXs including many proteins originally known as bacterioferritin comigratory proteins (BCP), based on their electrophoretic mobility before their function was identified. PRXs are thiol-specific antioxidant (TSA) proteins also known as TRX peroxidases and alkyl hydroperoxide reductase C22 (AhpC) proteins. They confer a protective antioxidant role in cells through their peroxidase activity in which hydrogen peroxide, peroxynitrate, and organic hydroperoxides are reduced and detoxified using reducing equivalents derived from either TRX, glutathione, trypanothione and AhpF. They are distinct from other peroxidases in that they have no cofactors such as metals or prosthetic groups. The first step of catalysis, common to all PRXs, is the nucleophilic attack by the catalytic cysteine (also known as the peroxidatic cysteine) on the peroxide leading to cleavage of the oxygen-oxygen bond and the formation of a

Probab=99.97 E-value=2.8e-32 Score=219.59 Aligned_cols=138 Identities=38% Similarity=0.551 Sum_probs=124.1 Q ss_pred CCCCEEEECCCCCEEEHHHHCCCEEEEEEEECCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC-CC Q ss_conf 53730788699978828986998599996511367663112610000000001233332223444321111222210-00 Q gi|254780212|r 9 KAPHFVLPSNDEQEISLLALGGSKIVLYFYPKDDTSGCTAEAINFSSLKADFDEESTILIGISPDSIASHKKFHQKH-NL 87 (157) Q Consensus 9 ~aP~f~l~~~~g~~~~l~~l~gk~vvl~f~~~~~tp~C~~e~~~l~~~~~~~~~~gv~vv~is~d~~~~~~~~~~~~-~~ 87 (157) T Consensus 1 kAP~f~l~~~~g~~~~l~~~~gk~vvl~f~p~~~~p~C~~e~~~~~~~~~~~~~~g~~vv~Is~d~~~~~~~~~~~~~~~ 80 (140) T cd02971 1 KAPDFTLPATDGGEVSLSDFKGKWVVLFFYPKDFTPVCTTELCAFRDLAEEFAKGGAEVLGVSVDSPFSHKAWAEKEGGL 80 (140) T ss_pred CCCCEEEECCCCCEEEHHHHCCCEEEEEEECCCCCCCCHHHHHHHHHHHHHHHCCCCEEEEECCCCHHHHHHHHHHHCCC T ss_conf 99988958899999867997989499999999889996144688999988750477168776289999999999984588 Q ss_pred CCCCHHHHHHHHHHHCCCCCCCCCCCCCCCCCCEEEEEECCCCEEEEEECCCC-CCCCHHHHH Q ss_conf 00000123445899859866665576654442107999889997999976888-578999999 Q gi|254780212|r 88 SITLLADESKEVLKSYDVWKEKSMFGKKYMGVVRTTFLIDEKGIIAQIWKPVT-LKNHAQSVL 149 (157) Q Consensus 88 ~fpil~D~~~~~~~~~gv~~~~~~~~~~~~~~~r~tfiid~~G~I~~~~~~~~-~~~~~~eil 149 (157) T Consensus 81 ~f~~l~D~~~~~~~~ygv~~~~~~---~~~~~~r~tfvId~~G~I~~~~i~~~~~~~~~~~~l 140 (140) T cd02971 81 NFPLLSDPDGEFAKAYGVLIEKSA---GGGLAARATFIIDPDGKIRYVEVEPLPTGRNAEELL 140 (140) T ss_pred CCEEEECCCHHHHHHCCCCCCCCC---CCCCCCCEEEEECCCCEEEEEEECCCCCCCCHHHHC T ss_conf 865888686899998399734655---789521089999999989999988999997957709

HHsearch alignment for GI: 254780212 and conserved domain: cd02971