A viable Arabidopsis pex13 missense allele confers severe peroxisomal defects and decreases PEX5 association with peroxisomes.

A viable Arabidopsis pex13 missense allele confers severe peroxisomal defects and decreases PEX5 association with peroxisomes.
复制标题

DOI:
10.1007/s11103-014-0223-8
复制
发表时间:
2014-09
影响因子:
5.1
通讯作者:
Bartel B
Bartel B
中科院分区:
生物学2区
文献类型:
--
作者:
Woodward AW;Fleming WA;Burkhart SE;Ratzel SE;Bjornson M;Bartel B

文献摘要

参考文献

被引文献

相似文献

过氧化物酶体是分解代谢脂肪酸并分隔真核生物中其他氧化代谢过程的细胞器。使用旨在恢复严重过氧化物酶体缺陷突变体的正向遗传筛选,我们分离出了具有显着过氧化物酶体缺陷的过氧化物酶体生物发生基因 PEX13 的可行等位基因。 pex13-4 突变体需要外源固定碳源进行光合作用前的发育,并且对原生长素吲哚-3-丁酸具有抗性。过氧化物酶体靶向基质蛋白的递送取决于 PEX5 受体与过氧化物酶体膜上的 PEX13 对接,我们发现 pex13-4 幼苗中基质蛋白的输入严重减少,细胞器相关的 PEX5 减少。此外,当PEX5过表达时,pex13-4的生理和分子缺陷得到部分改善,这表明PEX5对接在该突变体中部分受到损害,并且可以通过增加PEX5水平来改善。由于先前描述的拟南芥 pex13 等位基因要么是致命的,要么仅产生细微缺陷,因此 pex13-4 突变体为植物过氧化物酶体受体对接和基质蛋白输入提供了宝贵的见解。
Peroxisomes are organelles that catabolize fatty acids and compartmentalize other oxidative metabolic processes in eukaryotes. Using a forward-genetic screen designed to recover severe peroxisome-defective mutants, we isolated a viable allele of the peroxisome biogenesis gene PEX13 with striking peroxisomal defects. The pex13-4 mutant requires an exogenous source of fixed carbon for pre-photosynthetic development and is resistant to the protoauxin indole-3-butyric acid. Delivery of peroxisome-targeted matrix proteins depends on the PEX5 receptor docking with PEX13 at the peroxisomal membrane, and we found severely reduced import of matrix proteins and less organelle-associated PEX5 in pex13-4 seedlings. Moreover, pex13-4 physiological and molecular defects were partially ameliorated when PEX5 was overexpressed, suggesting that PEX5 docking is partially compromised in this mutant and can be improved by increasing PEX5 levels. Because previously described Arabidopsis pex13 alleles either are lethal or confer only subtle defects, the pex13-4 mutant provides valuable insight into plant peroxisome receptor docking and matrix protein import.
DOI: 10.1083/jcb.144.6.1151
发表时间: 1999-03-22
期刊: The Journal of cell biology
影响因子: --
作者:
Girzalsky W;Rehling P;Stein K;Kipper J;Blank L;Kunau WH;Erdmann R
通讯作者: Erdmann R
DOI: 10.1007/bf00331014
发表时间: 1986-01-01
期刊: MOLECULAR AND GENERAL GENETICS
影响因子: --
作者:
KONCZ, C;SCHELL, J
通讯作者: SCHELL, J
DOI: 10.1002/yea.320080805
发表时间: 1992-08-01
期刊: YEAST
影响因子: 2.6
作者:
GOULD, SJ;MCCOLLUM, D;SUBRAMANI, S
通讯作者: SUBRAMANI, S
DOI: 10.1046/j.1365-313x.1998.00343.x
发表时间: 1998-12-01
期刊: PLANT JOURNAL
影响因子: 7.2
作者:
Clough, SJ;Bent, AF
通讯作者: Bent, AF
DOI: 10.1007/bf00331020
发表时间: 1986-01-01
期刊: MOLECULAR AND GENERAL GENETICS
影响因子: --
作者:
HAUGHN, GW;SOMERVILLE, C
通讯作者: SOMERVILLE, C