>gnl|CDD|48541 cd02992, PDI_a_QSOX, PDIa family, Quiescin-sulfhydryl oxidase (QSOX) subfamily; QSOX is a eukaryotic protein containing an N-terminal redox active TRX domain, similar to that of PDI, and a small C-terminal flavin adenine dinucleotide (FAD)-binding domain homologous to the yeast ERV1p protein. QSOX oxidizes thiol groups to disulfides like PDI, however, unlike PDI, this oxidation is accompanied by the reduction of oxygen to hydrogen peroxide. QSOX is localized in high concentrations in cells with heavy secretory load and prefers peptides and proteins as substrates, not monothiols like glutathione. Inside the cell, QSOX is found in the endoplasmic reticulum and Golgi. The flow of reducing equivalents in a QSOX-catalyzed reaction goes from the dithiol substrate -> dithiol of the QSOX TRX domain -> dithiols of the QSOX ERV1p domain -> FAD -> oxygen.. Length = 114

 Score = 45.6 bits (108), Expect = 3e-06
 Identities = 23/85 (27%), Positives = 42/85 (49%), Gaps = 5/85 (5%)

Query: 2  SALKVDTKSFDSEVLECSNPVVVDFWASWCRPCVKLSPIIDDIADELAD---KVKITKLD 58
            + +D  SF+S +L   +  +V+F+ASWC  C   +P    +A +L      V++  +D
Sbjct: 2  PVIVLDAASFNSALLGSPSAWLVEFYASWCGHCRAFAPTWKKLARDLRKWRPVVRVAAVD 61

Query: 59 --IEESSEISTRYQISSIPTLILFK 81
             EE+  +   + ++  PTL  F 
Sbjct: 62 CADEENVALCRDFGVTGYPTLRYFP 86