Identification of the yeast ARG‐11 gene as a mitochondrial ornithine carrier involved in arginine biosynthesis

FEBS Letters

Iacobazzi, Vito¹  Runswick, Michael J²  Walker, John E²  De Marco, Valeria¹  Palmieri, Luigi²  Palmieri, Ferdinando¹ 

[1] Department of Pharmaco-Biology, Laboratory of Biochemistry and Molecular Biology, University of Bari, Via Orabona 4, 70125 Bari, Italy;The M.R.C. Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK

关键词: ARG-11 gene;    Arginine biosynthesis;    Ornithine carrier;    Transport;    Yeast mitochondrion;   

DOI  :  10.1016/S0014-5793(97)00630-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The ARG-11 gene in Saccharomyces cerevisiae encodes a protein with the characteristic features of a family of 35 related membrane proteins that are encoded in the fungal genome. Some of them are known to transport various substrates and products across the inner membranes of mitochondria, but the functions of 29 members of the family are unknown. The yeast ARG-11 protein has been over-produced as inclusion bodies in Escherichia coli. It has been solubilized in the presence of sarkosyl, re-constituted into liposomes and shown to transport ornithine in exchange for protons. Its main physiological role is probably to take ornithine synthesized from glutamate in the mitochondrial matrix to the cytosol where it is converted to arginine.

【 授权许可】

Unknown