» Articles » PMID: 16194150

Identification of a Mitochondrial Transporter for Pyrimidine Nucleotides in Saccharomyces Cerevisiae: Bacterial Expression, Reconstitution and Functional Characterization

Overview
Journal Biochem J
Specialty Biochemistry
Date 2005 Oct 1
PMID 16194150
Citations 36
Authors
Affiliations
Soon will be listed here.
Abstract

Pyrimidine (deoxy)nucleoside triphosphates are required in mitochondria for the synthesis of DNA and the various types of RNA present in these organelles. In Saccharomyces cerevisiae, these nucleotides are synthesized outside the mitochondrial matrix and must therefore be transported across the permeability barrier of the mitochondrial inner membrane. However, no protein has ever been found to be associated with this transport activity. In the present study, Rim2p has been identified as a yeast mitochondrial pyrimidine nucleotide transporter. Rim2p (replication in mitochondria 2p) is a member of the mitochondrial carrier protein family having some special features. The RIM2 gene was overexpressed in bacteria. The purified protein was reconstituted into liposomes and its transport properties and kinetic parameters were characterized. It transported the pyrimidine (deoxy)nucleoside tri- and di-phosphates and, to a lesser extent, pyrimidine (deoxy)nucleoside monophosphates, by a counter-exchange mechanism. Transport was saturable, with an apparent K(m) of 207 microM for TTP, 404 microM for UTP and 435 microM for CTP. Rim2p was strongly inhibited by mercurials, bathophenanthroline, tannic acid and Bromocresol Purple, and partially inhibited by bongkrekic acid. Furthermore, the Rim2p-mediated heteroexchanges, TTP/TMP and TTP/TDP, are electroneutral and probably H+-compensated. The main physiological role of Rim2p is proposed to be to transport (deoxy)pyrimidine nucleoside triphosphates into mitochondria in exchange for intramitochondrially generated (deoxy)pyrimidine nucleoside monophosphates.

Citing Articles

Lack of Mitochondrial DNA Provides Metabolic Advantage in Yeast Osmoadaptation.

Di Noia M, Ocheja O, Scarcia P, Pisano I, Messina E, Agrimi G Biomolecules. 2024; 14(6).

PMID: 38927107 PMC: 11201435. DOI: 10.3390/biom14060704.


Minimal Out-of-Equilibrium Metabolism for Synthetic Cells: A Membrane Perspective.

Bailoni E, Partipilo M, Coenradij J, Grundel D, Slotboom D, Poolman B ACS Synth Biol. 2023; 12(4):922-946.

PMID: 37027340 PMC: 10127287. DOI: 10.1021/acssynbio.3c00062.


Evidence for Non-Essential Salt Bridges in the M-Gates of Mitochondrial Carrier Proteins.

Miniero D, Monne M, Di Noia M, Palmieri L, Palmieri F Int J Mol Sci. 2022; 23(9).

PMID: 35563451 PMC: 9104175. DOI: 10.3390/ijms23095060.


The intra-mitochondrial O-GlcNAcylation system rapidly modulates OXPHOS function and ROS release in the heart.

Dontaine J, Bouali A, Daussin F, Bultot L, Vertommen D, Martin M Commun Biol. 2022; 5(1):349.

PMID: 35414690 PMC: 9005719. DOI: 10.1038/s42003-022-03282-3.


Mitochondrial transport and metabolism of the vitamin B-derived cofactors thiamine pyrophosphate, coenzyme A, FAD and NAD , and related diseases: A review.

Palmieri F, Monne M, Fiermonte G, Palmieri L IUBMB Life. 2022; 74(7):592-617.

PMID: 35304818 PMC: 9311062. DOI: 10.1002/iub.2612.


References
1.
Fiermonte G, Walker J, Palmieri F . Abundant bacterial expression and reconstitution of an intrinsic membrane-transport protein from bovine mitochondria. Biochem J. 1993; 294 ( Pt 1):293-9. PMC: 1134597. DOI: 10.1042/bj2940293. View

2.
WOHLRAB H, Briggs C . Yeast mitochondrial phosphate transport protein expressed in Escherichia coli. Site-directed mutations at threonine-43 and at a similar location in the second tandem repeat (isoleucine-141). Biochemistry. 1994; 33(32):9371-5. DOI: 10.1021/bi00198a001. View

3.
Kaplan R, Mayor J, Gremse D, Wood D . High level expression and characterization of the mitochondrial citrate transport protein from the yeast Saccharomyces cerevisiae. J Biol Chem. 1995; 270(8):4108-14. DOI: 10.1074/jbc.270.8.4108. View

4.
Van Dyck E, Jank B, Ragnini A, Schweyen R, Duyckaerts C, Sluse F . Overexpression of a novel member of the mitochondrial carrier family rescues defects in both DNA and RNA metabolism in yeast mitochondria. Mol Gen Genet. 1995; 246(4):426-36. DOI: 10.1007/BF00290446. View

5.
Palmieri F, Indiveri C, Bisaccia F, Iacobazzi V . Mitochondrial metabolite carrier proteins: purification, reconstitution, and transport studies. Methods Enzymol. 1995; 260:349-69. DOI: 10.1016/0076-6879(95)60150-3. View