Abstract
We have characterized Cox16p, a new cytochrome oxidase (COX) assembly factor. This protein is encoded by COX16, corresponding to the previously uncharacter. ized open reading frame YJL003w of the yeast genome. COX16 was identified in studies of COX-deficient mutants previously assigned to complementation group G22 of a collection of yeast pet mutants. To determine its location, Cox16p was tagged with a Myc epitope at the C terminus. The fusion protein, when expressed from a low-copy plasmid, complements the mutant and is detected solely in mitochondria. Cox16p-myc is an integral component of the mitochondrial inner membrane, with its C terminus exposed to the intermembrane space. Cox16 homologues are found in both the human and murine genomes, although human COX16 does not complement the yeast mutant. Cox16p does not appear to be involved in maturation of subunit 2, copper recruit. ment, or heme A biosynthesis. Cox16p is thus a new protein in the growing family of eukaryotic COX assembly factors for which there are as yet no specific func. tions known. Like other recently described nuclear gene products involved in expression of cytochrome oxidase, COX16 is a candidate for screening in inherited human COX deficiencies.
| Original language | English |
|---|---|
| Pages (from-to) | 3770-3775 |
| Number of pages | 6 |
| Journal | Journal of Biological Chemistry |
| Volume | 278 |
| Issue number | 6 |
| DOIs | |
| State | Published - Feb 7 2003 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Biochemistry
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COX16 encodes a novel protein required for the assembly of cytochrome oxidase in Saccharomyces cerevisiae. / Carlson, Christopher G.; Barrientos, Antonio; Tzagoloff, Alexander; Glerum, D. Moira.
In: Journal of Biological Chemistry, Vol. 278, No. 6, 07.02.2003, p. 3770-3775.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - COX16 encodes a novel protein required for the assembly of cytochrome oxidase in Saccharomyces cerevisiae
AU - Carlson, Christopher G.
AU - Barrientos, Antonio
AU - Tzagoloff, Alexander
AU - Glerum, D. Moira
PY - 2003/2/7
Y1 - 2003/2/7
N2 - We have characterized Cox16p, a new cytochrome oxidase (COX) assembly factor. This protein is encoded by COX16, corresponding to the previously uncharacter. ized open reading frame YJL003w of the yeast genome. COX16 was identified in studies of COX-deficient mutants previously assigned to complementation group G22 of a collection of yeast pet mutants. To determine its location, Cox16p was tagged with a Myc epitope at the C terminus. The fusion protein, when expressed from a low-copy plasmid, complements the mutant and is detected solely in mitochondria. Cox16p-myc is an integral component of the mitochondrial inner membrane, with its C terminus exposed to the intermembrane space. Cox16 homologues are found in both the human and murine genomes, although human COX16 does not complement the yeast mutant. Cox16p does not appear to be involved in maturation of subunit 2, copper recruit. ment, or heme A biosynthesis. Cox16p is thus a new protein in the growing family of eukaryotic COX assembly factors for which there are as yet no specific func. tions known. Like other recently described nuclear gene products involved in expression of cytochrome oxidase, COX16 is a candidate for screening in inherited human COX deficiencies.
AB - We have characterized Cox16p, a new cytochrome oxidase (COX) assembly factor. This protein is encoded by COX16, corresponding to the previously uncharacter. ized open reading frame YJL003w of the yeast genome. COX16 was identified in studies of COX-deficient mutants previously assigned to complementation group G22 of a collection of yeast pet mutants. To determine its location, Cox16p was tagged with a Myc epitope at the C terminus. The fusion protein, when expressed from a low-copy plasmid, complements the mutant and is detected solely in mitochondria. Cox16p-myc is an integral component of the mitochondrial inner membrane, with its C terminus exposed to the intermembrane space. Cox16 homologues are found in both the human and murine genomes, although human COX16 does not complement the yeast mutant. Cox16p does not appear to be involved in maturation of subunit 2, copper recruit. ment, or heme A biosynthesis. Cox16p is thus a new protein in the growing family of eukaryotic COX assembly factors for which there are as yet no specific func. tions known. Like other recently described nuclear gene products involved in expression of cytochrome oxidase, COX16 is a candidate for screening in inherited human COX deficiencies.
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UR - http://www.scopus.com/inward/citedby.url?scp=0037423199&partnerID=8YFLogxK
U2 - 10.1074/jbc.M209893200
DO - 10.1074/jbc.M209893200
M3 - Article
C2 - 12446688
AN - SCOPUS:0037423199
VL - 278
SP - 3770
EP - 3775
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
SN - 0021-9258
IS - 6
ER -