FUNCTION: THIS IS A COMPONENT OF THE UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX (COMPLEX III OR CYTOCHROME B-C1 COMPLEX), WHICH IS PART OF THE MITOCHONDRIAL RESPIRATORY CHAIN. THIS PROTEIN MAY MEDIATE FORMATION OF THE COMPLEX BETWEEN CYTOCHROMES C AND C1. * CATALYTIC ACTIVITY: QH2 + 2 ferricytochrome c = Q + 2 ferrocytochrome c. * SUBUNIT: BC1 COMPLEX CONTAINS 11 SUBUNITS; 3 RESPIRATORY SUBUNITS (CYTOCHROME B, CYTOCHROME C1, RIESKE PROTEIN), 2 CORE PROTEINS AND 6 LOW-MOLECULAR WEIGHT PROTEINS. * SUBCELLULAR LOCATION: Mitochondrial inner membrane. * SIMILARITY: BELONGS TO PEPTIDASE FAMILY M16. * CAUTION: DOES NOT SEEM TO HAVE A PROTEASE ACTIVITY AS IT LACK THE ZINC-BINDING SITE. |
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16-JAN-03
Last Update 13-Mar-03