PMID- 17882260 OWN - NLM STAT- MEDLINE DCOM- 20071211 LR - 20240109 IS - 1460-2075 (Electronic) IS - 0261-4189 (Print) IS - 0261-4189 (Linking) VI - 26 IP - 20 DP - 2007 Oct 17 TI - Coa1 links the Mss51 post-translational function to Cox1 cofactor insertion in cytochrome c oxidase assembly. PG - 4335-46 AB - The assembly of cytochrome c oxidase (CcO) in yeast mitochondria is shown to be dependent on a new assembly factor designated Coa1 that associates with the mitochondrial inner membrane. Translation of the mitochondrial-encoded subunits of CcO occurs normally in coa1Delta cells, but these subunits fail to accumulate. The respiratory defect in coa1Delta cells is suppressed by high-copy MSS51, MDJ1 and COX10. Mss51 functions in Cox1 translation and elongation, whereas Cox10 participates in the biosynthesis of heme a, a key cofactor of CcO. Respiration in coa1Delta and shy1Delta cells is enhanced when Mss51 and Cox10 are coexpressed. Shy1 has been implicated in formation of the heme a3-Cu(B) site in Cox1. The interaction between Coa1 and Cox1, and the physical and genetic interactions between Coa1 and Mss51, Shy1 and Cox14 suggest that Coa1 coordinates the transition of newly synthesized Cox1 from the Mss51:Cox14 complex to the heme a cofactor insertion involving Shy1. coa1Delta cells also display a mitochondrial copper defect suggesting that Coa1 may have a direct link to copper metallation of CcO. FAU - Pierrel, Fabien AU - Pierrel F AD - Department of Medicine, University of Utah Health Sciences Center, University of Utah, Salt Lake City, UT 84132, USA. FAU - Bestwick, Megan L AU - Bestwick ML FAU - Cobine, Paul A AU - Cobine PA FAU - Khalimonchuk, Oleh AU - Khalimonchuk O FAU - Cricco, Julia A AU - Cricco JA FAU - Winge, Dennis R AU - Winge DR LA - eng GR - R01 ES003817/ES/NIEHS NIH HHS/United States GR - R37 ES003817/ES/NIEHS NIH HHS/United States GR - DK P30 072437/DK/NIDDK NIH HHS/United States GR - ES 03817/ES/NIEHS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20070920 PL - England TA - EMBO J JT - The EMBO journal JID - 8208664 RN - 0 (COX14 protein, S cerevisiae) RN - 0 (Fungal Proteins) RN - 0 (Membrane Proteins) RN - 0 (Mitochondrial Proteins) RN - 0 (Mss51 protein, S cerevisiae) RN - 0 (Nuclear Proteins) RN - 0 (SHY1 protein, S cerevisiae) RN - 0 (Saccharomyces cerevisiae Proteins) RN - 0 (Transcription Factors) RN - 42VZT0U6YR (Heme) RN - 789U1901C5 (Copper) RN - EC 1.9.3.1 (Electron Transport Complex IV) SB - IM MH - Copper/chemistry MH - Electron Transport Complex IV/chemistry/*physiology MH - Fungal Proteins/*physiology MH - *Gene Expression Regulation, Fungal MH - Heme/chemistry MH - Membrane Proteins/physiology MH - Mitochondria/metabolism MH - Mitochondrial Proteins MH - Models, Biological MH - Nuclear Proteins/physiology MH - Oxygen Consumption MH - Protein Binding MH - Protein Biosynthesis MH - *Protein Processing, Post-Translational MH - Saccharomyces cerevisiae Proteins/*physiology MH - Transcription Factors/*physiology PMC - PMC2034670 EDAT- 2007/09/21 09:00 MHDA- 2007/12/12 09:00 PMCR- 2008/10/17 CRDT- 2007/09/21 09:00 PHST- 2007/04/10 00:00 [received] PHST- 2007/08/09 00:00 [accepted] PHST- 2007/09/21 09:00 [pubmed] PHST- 2007/12/12 09:00 [medline] PHST- 2007/09/21 09:00 [entrez] PHST- 2008/10/17 00:00 [pmc-release] AID - 7601861 [pii] AID - 10.1038/sj.emboj.7601861 [doi] PST - ppublish SO - EMBO J. 2007 Oct 17;26(20):4335-46. doi: 10.1038/sj.emboj.7601861. Epub 2007 Sep 20.