Evidence for several cysteine transport mechanisms in the mitochondrial membranes of Arabidopsis thaliana.
Evidence for several cysteine transport mechanisms in the mitochondrial membranes of Arabidopsis thaliana.
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拟南芥线粒体膜中几种半胱氨酸转运机制的证据
DOI:
10.1093/pcp/pct155
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发表时间:
2014
影响因子:
4.9
通讯作者:
中科院分区:
文献类型:
--
作者:
Cysteine is essential for many mitochondrial processes in plants, including translation, iron–sulfur cluster biogenesis and cyanide detoxification. Its biosynthesis is carried out by serine acetyltransferase (SAT) andO-acetylserine (thiol) lyase (OAS-TL) which can be found in the cytosol, plastids and mitochondria. Mutants lacking one compartment-specific OAS-TL isoform show viable phenotypes, leading to the hypothesis that the organellar membranes are permeable to substrates and products of the cysteine biosynthetic pathway. In this report, we show that exogenouslly supplied [35S]cysteine accumulates in the mitochondrial fraction and is taken up into isolated mitochondria for in organello protein synthesis. Analysis of cysteine uptake by isolated mitochondria and mitoplasts indicates that cysteine is transported by multiple facilitated mechanisms that operate in a concentration gradient-dependent manner. In addition, cysteine uptake is dependent mainly on the ΔpH across the inner membrane. The rates of mitochondrial cysteine transport can be mildly altered by specific metabolites in the cyanide detoxification-linked sulfide oxidation, but not by most substrates and products of the cysteine biosynthetic pathway. Based on these results, we propose that the transport of cysteine plays a pivotal role in regulating cellular cysteine biosynthesis as well as modulating the availability of sulfur for mitochondrial metabolism.
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DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
M. Murcha;R. Lister;A. Ho;J. Whelan
通讯作者:
J. Whelan
影响因子:
7.4
作者:
LUNN, JE;DROUX, M;DOUCE, R
通讯作者:
DOUCE, R
DOI:
10.1073/pnas.1115581109
发表时间:
2012-01-31
影响因子:
11.1
作者:
Ruivo, Raquel;Bellenchi, Gian Carlo;Gasnier, Bruno
通讯作者:
Gasnier, Bruno
DOI:
10.1074/jbc.m112.372656
发表时间:
2012
期刊:
The Journal of Biological Chemistry
影响因子:
--
作者:
K. F. M;Schwarzlander;Sweetlove;Ratcliffe
通讯作者:
Ratcliffe
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
C. Mannella
通讯作者:
C. Mannella