Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1225863 | Journal of Proteomics | 2010 | 9 Pages |
The role of cardiolipin acyl chain composition in assembly/stabilization of mitochondrial complexes was investigated using three yeast deletion mutants (acb1Δ strain; taz1Δ strain; and acb1Δtaz1Δ strain). Deletion of the TAZ1 gene, involved in cardiolipin acyl chain remodeling, is known to increase the content of monolyso-cardiolipin (MLCL) at the expense of CL, and to decrease the unsaturation of the remaining CL. Deletion of the ACB1 gene encoding the acyl-CoA-binding protein, involved in fatty acid elongation, decreases the average length of the CL acyl chains. Furthermore, a TAZ1ACB1 double deletion mutant strain was used in this study which has both a decrease in the length of the CL acyl chains and an increase in MLCL. BN/SDS PAGE analysis revealed that cardiolipin is important for the prohibitin–m-AAA protease complex, the α-ketoglutarate dehydrogenase complex and respiratory chain supercomplexes. The results indicate that the decreased level of complexes in taz1Δ and acb1Δtaz1Δ mitochondria is due to a decreased content of CL or the presence of MLCL.