中文摘要：

蛋白质二硫键异构酶 A3（ protein disulfide isomerase A3， PDIA3），又称 ERp57或 ERp57／GRP58，是蛋白质二硫键异构酶（ protein disulfide isomerase，PDI）家族的一员，具有催化内质网中蛋白质二硫键形成、氧化还原及异构化的作用。 Bennett等［1］于1988年首次从不同物种中分离出PDIA3基因的互补DNA编码链，诸多研究显示其氨基酸序列与PDI有高度相似性，具有 PDI 活性，遂将其归为PDI家族。

英文摘要：

Protein disulfide isomerase A3 （PDIA3） is a member of protein disulphide isomerase family and widely exists in endoplasmic reticulum, cell surface, nucleus and mitochondria.PDIA3 promotes the glycoprotein folding and quality control in the endoplasmic reticulum and is also a key molecular of major histocompatibility complex class I mol-ecules assembly.In addition, PDIA3 is involved in the cell signal transduction and plays an important role in a variety of disease development.Therefore, this paper talks about the function of PDIA3, the relationship between disease and PDIA3 as well as its clinical outlook.