>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 = 42.8 bits (101), Expect = 4e-05
 Identities = 27/103 (26%), Positives = 40/103 (38%), Gaps = 8/103 (7%)

Query: 29  KDVNTQDLFAGKRVFLFALPGAFTPTCSDHQLPGFEKIYDDLRCEGIEEVYCLSVNDAFV 88
            +V+  D FAGK   +   P   TP C   Q   F K    L  +    V  +S +  F 
Sbjct: 17  SEVSLAD-FAGKVKVISVFPSIDTPVC-ATQTKRFNKEAAKL--DNTV-VLTISADLPFA 71

Query: 89  MNAWGKKLEIKNVKLLPD-GSGEFTRKMGMLVYKDNVGFGLRS 130
              W     + NV  L D     F +  G+L+   ++G   R+
Sbjct: 72  QKRWCGAEGVDNVTTLSDFRDHSFGKAYGVLI--KDLGLLARA 112