>gnl|CDD|48563 cd03014, PRX_Atyp2cys, Peroxiredoxin (PRX) family, Atypical 2-cys PRX subfamily; composed of PRXs containing peroxidatic and resolving cysteines, similar to the homodimeric thiol specific antioxidant (TSA) protein also known as TRX-dependent thiol peroxidase (Tpx). Tpx is a bacterial periplasmic peroxidase which differs from other PRXs in that it shows substrate specificity toward alkyl hydroperoxides over hydrogen peroxide. As with all other PRXs, the peroxidatic cysteine (N-terminal) of Tpx is oxidized into a sulfenic acid intermediate upon reaction with peroxides. Tpx is able to resolve this intermediate by forming an intramolecular disulfide bond with a conserved C-terminal cysteine (the resolving cysteine), which can then be reduced by thioredoxin. This differs from the typical 2-cys PRX which resolves the oxidized cysteine by forming an intermolecular disulfide bond with the resolving cysteine from the other subunit of the homodimer. Atypical 2-cys PRX homodimers have a loop-based interface (A-type for alternate), in contrast with the B-type interface of typical 2-cys and 1-cys PRXs.. Length = 143

 Score = 60.6 bits (147), Expect = 2e-10
 Identities = 41/138 (29%), Positives = 61/138 (44%), Gaps = 24/138 (17%)

Query: 5   SVGDKAPHFVLPSNDEQEISLLALGGSKIVLYFYPKDDTSGCTAEAINFSSLKADFDEES 64
            VGDKAP F L ++D  E+SL    G   V+  +P  DT  C  +   F+   A  D   
Sbjct: 1   KVGDKAPDFTLVTSDLSEVSLADFAGKVKVISVFPSIDTPVCATQTKRFNKEAAKLDN-- 58

Query: 65  TILIGISPDSIASHKKFHQKHNL-SITLLADESKEVLKSYDVWKEKSMFGKKYMGVV--- 120
           T+++ IS D   + K++     + ++T L+D                 FGK Y GV+   
Sbjct: 59  TVVLTISADLPFAQKRWCGAEGVDNVTTLSDF------------RDHSFGKAY-GVLIKD 105

Query: 121 -----RTTFLIDEKGIIA 133
                R  F+IDE G + 
Sbjct: 106 LGLLARAVFVIDENGKVI 123