StAR - A tissue specific acute mediator of steroidogenesis

被引:35
作者
Clark, BJ [1 ]
Stocco, DM [1 ]
机构
[1] TEXAS TECH UNIV,HLTH SCI CTR,DEPT CELL BIOL & BIOCHEM,LUBBOCK,TX 79430
关键词
ACUTE REGULATORY PROTEIN; LEYDIG TUMOR-CELLS; SIDE-CHAIN CLEAVAGE; RAT ADRENAL-CORTEX; MITOCHONDRIAL PROTEINS; ADRENOCORTICOTROPIC HORMONE; RAPID ACCUMULATION; FASCICULATA CELLS; CORPUS-LUTEUM; STIMULATION;
D O I
10.1016/S1043-2760(96)00114-2
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
The rate-limiting and acutely regulated step in steroid hormone biosynthesis is the translocation of cholesterol, the precursor of all steroid hormones, from the mitochondrial outer membrane to the inner membrane, where it is converted to pregnenolone by the cytochrome P450 cholesterol side-chain cleavage enzyme (P450scc). This step has long been known to be dependent upon the de novo synthesis of a labile protein factor, which is required for the intramitochondrial translocation of cholesterol. Recently, the Steroidogenic Acute Regulatory (StAR) protein has been shown to have an indispensable role in acute steroid production and is proposed to be this labile protein factor. Given the fundamental importance of StAR as a key regulator of steroid hormone biosynthesis, the next frontier for researchers is elucidating the molecular mechanisms that control StAR expression and function.
引用
收藏
页码:227 / 233
页数:7
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