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Molecular cloning of a novel human acid phosphatase gene (ACPT) that is highly expressed in the testis.

机译:在睾丸中高表达的新型人类酸性磷酸酶基因(ACPT)的分子克隆。

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摘要

Acid phosphatases are enzymes capable of hydrolyzing orthophosphoric acid esters in an acid medium. Prostatic acid phosphatase has served as a tumor marker for metastatic prostate cancer for many years. We have cloned a new human acid phosphatase gene (named testicular acid phosphatase, ACPT), which is expressed mainly in testis and to a lower extent in the prostate, trachea, and other tissues. This gene maps to chromosome 19q13.4, in an area that harbors many cancer-related genes. The testicular acid phosphatase gene is composed of 11 exons, and the protein is predicted to have a luminal domain, a transmembrane domain, and a cytoplasmic domain. The N-terminal end of the protein encodes a signal peptide. The protein has approximately 50% homology with both the prostatic and the lysosomal acid phosphatases, and the position of the cysteine residues, the N-glycosylation sites, and the histidine catalytic site are conserved among the three proteins. The testicular acid phosphatase gene is up-regulated by androgens and is down-regulated by estrogens in the prostate cancer cell line LNCaP. Our preliminary results indicate that this gene exhibits a lower level of expression in testicular cancer tissues than in their normal counterparts. Copyright 2001 Academic Press.
机译:酸性磷酸酶是能够在酸性介质中水解正磷酸酯的酶。多年来,前列腺酸磷酸酶一直是转移性前列腺癌的肿瘤标志物。我们已经克隆了一个新的人类酸性磷酸酶基因(称为睾丸酸性磷酸酶,ACPT),该基因主要在睾丸中表达,在前列腺,气管和其他组织中的表达较低。该基因映射到19q13.4号染色体,该区域具有许多与癌症相关的基因。睾丸酸磷酸酶基因由11个外显子组成,预计该蛋白具有腔结构域,跨膜结构域和胞质结构域。蛋白质的N末端编码信号肽。该蛋白质与前列腺酸和溶酶体酸性磷酸酶具有大约50%的同源性,并且在这三种蛋白质中半胱氨酸残基的位置,N-糖基化位点和组氨酸催化位点是保守的。在前列腺癌细胞系LNCaP中,睾丸酸磷酸酶基因被雄激素上调,而被雌激素下调。我们的初步结果表明,该基因在睾丸癌组织中的表达水平低于正常人。版权所有2001,学术出版社。

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