Identification and Characterization of the Human Orthologue of Yeast Pex14p

Identification and Characterization of the Human Orthologue of Yeast Pex14p
复制标题

酵母 Pex14p 人类直系同源物的鉴定和表征

DOI:
10.1128/mcb.19.3.2265
复制
发表时间:
1999
影响因子:
5.3
通讯作者:
R. Erdmann
R. Erdmann
中科院分区:
生物学2区
文献类型:
--
作者:
G. Will;M. Soukupová;Xinji Hong;K. S. Erdmann;J. Kiel;G. Dodt;W. Kunau;R. Erdmann

文献摘要

参考文献

被引文献

相似文献

摘要Pex14 p是过氧化物酶体蛋白输入机制的核心成分,它被认为是酵母细胞中PTS1和PTS2依赖性蛋白输入的汇聚点。在这里,我们描述了人类过氧化物酶体相关蛋白(HsPex14p),它显示出显着的相似性,酵母Pex14p的鉴定。HsPex14 p是一种抗碳酸盐的过氧化物酶体膜蛋白,其C末端暴露于胞质溶胶。蛋白质的N末端不能接近外源添加的抗体或蛋白酶,因此可能突出到过氧化物酶体腔中。HsPex14p过表达导致管状结构的装饰和过氧化物酶体过氧化氢酶向胞质溶胶的错误定位。HsPex14 p结合过氧化物酶体靶向信号1(PTS1)的胞质受体,这一结果与作为过氧化物酶体蛋白输入中的膜受体的功能一致。未观察到HsPex14 p的同源寡聚化或蛋白质与PTS2受体或HsPex13 p的相互作用。这将人Pex14 p与酵母细胞中的对应物区分开来,从而支持了最近的数据,这些数据表明,并非过氧化物酶体蛋白输入的所有方面在酵母和人之间都是保守的。HsPEX14 p在哺乳动物过氧化物酶体生物合成中的作用使HsPEX14成为负责人类过氧化物酶体生物合成障碍的未被识别的互补组的候选PBD基因。
ABSTRACT Pex14p is a central component of the peroxisomal protein import machinery, which has been suggested to provide the point of convergence for PTS1- and PTS2-dependent protein import in yeast cells. Here we describe the identification of a human peroxisome-associated protein (HsPex14p) which shows significant similarity to the yeast Pex14p. HsPex14p is a carbonate-resistant peroxisomal membrane protein with its C terminus exposed to the cytosol. The N terminus of the protein is not accessible to exogenously added antibodies or protease and thus might protrude into the peroxisomal lumen. HsPex14p overexpression leads to the decoration of tubular structures and mislocalization of peroxisomal catalase to the cytosol. HsPex14p binds the cytosolic receptor for the peroxisomal targeting signal 1 (PTS1), a result consistent with a function as a membrane receptor in peroxisomal protein import. Homo-oligomerization of HsPex14p or interaction of the protein with the PTS2-receptor or HsPex13p was not observed. This distinguishes the human Pex14p from its counterpart in yeast cells and thus supports recent data suggesting that not all aspects of peroxisomal protein import are conserved between yeasts and humans. The role of HsPex14p in mammalian peroxisome biogenesis makesHsPEX14 a candidate PBD gene for being responsible for an unrecognized complementation group of human peroxisome biogenesis disorders.
DOI: 10.1093/hmg/7.8.1195
发表时间: 1998-08-01
影响因子: 3.5
作者:
Braverman, N;Dodt, G;Valle, D
通讯作者: Valle, D
DOI: 10.1073/pnas.88.21.9578
发表时间: 1991-11-01
影响因子: 11.1
作者:
CHIEN, CT;BARTEL, PL;FIELDS, S
通讯作者: FIELDS, S
DOI: 10.1073/pnas.92.18.8259
发表时间: 1995-08-29
影响因子: 11.1
作者:
BERGER, B;WILSON, DB;KIM, PS
通讯作者: KIM, PS
DOI: 10.1073/pnas.89.13.5789
发表时间: 1992-07-01
影响因子: 11.1
作者:
CHEVRAY, PM;NATHANS, D
通讯作者: NATHANS, D
DOI: 10.1016/s0022-3476(95)70250-4
发表时间: 1995-07-01
影响因子: 5.1
作者:
MOSER, AB;RASMUSSEN, M;MOSER, HW
通讯作者: MOSER, HW