A GENE ENCODING A YEAST EQUIVALENT OF MAMMALIAN NADPH-ADRENODOXIN OXIDOREDUCTASES

Adrenodoxin oxidoreductase (ADR) and adrenodoxin (ADX) are the two pro teins involved in electron transport to mammalian mitochondrial P-450s capable of steroid modifications. The cloning and sequencing of a S. cervisiae ADR homologue (YADR) is presented here. The YADR protein seq uence shares 36 and 37% of identical amino acids with human and bovine ADR respectively. The physiological role of this ADR homologue in yea st is unknown. We intend to study the interaction of this YADR with bo vine ADX in vitro and in vivo.