Sci. STKE, 13 April 2004
RNA-BINDING PROTEINS Linking Cholesterol Synthesis to Reproduction
Nair and Menon report that mevalonate kinase, an enzyme involved in cholesterol biosynthesis, binds to the mRNA for luteinizing hormone receptor (LHR). An LHR mRNA-binding protein from rat ovary was purified and subjected to sequence analysis, which identified the protein as mevalonate kinase. The authors had previously shown that binding of this protein to LHR mRNA promoted its degradation. Gel-shift assays with either antibodies against mevalonate kinase or with recombinant mevalonate kinase showed that mevalonate kinase bound to the LHR mRNA. Both mevalonate and adenosine triphosphate inhibited binding of mevalonate kinase to the LHR mRNA in gel-shift assays. Cholesterol is the precursor for steroidogenic hormones, the synthesis of which is stimulated by activation of LHR. LHR signaling also stimulates cholesterol uptake and, thus, this interaction between mevalonate kinase and the LHR mRNA may serve to coordinate the metabolic and sexual signaling pathways.
Citation: Linking Cholesterol Synthesis to Reproduction. Sci. STKE 2004, tw131 (2004).
Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882