Mol Cell Proteomics 2003 Nov 01;211:1205-16. doi: 10.1074/mcp.M300035-MCP200.

Protein components of mitochondrial DNA nucleoids in higher eukaryotes.

Abstract
Mitochondrial DNA (mtDNA) is not packaged in nucleosomal particles, but has been reported to associate with the mitochondrial inner membrane. Gentle lysis of Xenopus oocyte mitochondria with nonionic detergent liberates a nucleoprotein complex containing mtDNA associated with a previously characterized DNA binding partner, mitochondrial transcription factor A (mtTFA), as well as a series of inner membrane proteins identified by sequencing. More extensive detergent treatment stripped most of these proteins from the DNA, leaving a limited number of proteins in a nucleoid core. Sequencing of the major proteins retained in association with mtDNA revealed the expected mtDNA binding proteins, mtTFA and mitochondrial single-stranded DNA binding protein (mtSSB), as well as four proteins not previously reported to associate with mtDNA. These include adenine nucleotide translocator 1, the lipoyl-containing E2 subunits of pyruvate dehydrogenase and branched chain alpha-ketoacid dehydrogenase and prohibitin 2. The association of several of these proteins with mtTFA-containing mtDNA nucleoids was confirmed by immunoprecipitation.

PubMed ID: 14514796
Article link: Mol Cell Proteomics
Grant support: [+]

Species referenced: Xenopus laevis
Genes referenced: phb1 tfam