该基因编码内质网（er）蛋白中的一个二硫键异构酶（pdi）家族成员，该家族催化蛋白质折叠和硫醇二硫键交换反应。编码的蛋白质具有N-端ER信号序列，两个硫氧还蛋白（Trx）结构域，具有非经典Ser-Lys Gln SER和Ser-Lys Lys Cys基序，分别是两个类Trx样结构域和C-末端ER保留序列。该蛋白在体外缺乏氧化还原酶活性，可能作为伴侣。这个基因的表达似乎仅限于睾丸。
This gene encodes a member of the disulfide isomerase (PDI) family of endoplasmic reticulum (ER) proteins that catalyze protein folding and thiol-disulfide interchange reactions. The encoded protein has has an N-terminal ER-signal sequence, two thioredoxin (TRX) domains with non-classical Ser-Lys-Gln-Ser and Ser-Lys-Lys-Cys motifs, respectively, two TRX-like domains, and a C-terminal ER-retention sequence. The protein lacks oxidoreductase activity in vitro and probably functions as a chaperone. This gene's expression appears to be limited to the testis.
