Structure and Expression of a New Complementary DNA Encoding the almost Exclusive 3β-Hydroxysteroid Dehydrogenase/Δ5-Δ4-lsomerase in Human Adrenals and Gonads

Structure and Expression of a New Complementary DNA Encoding the almost Exclusive 3β-Hydroxysteroid Dehydrogenase/Δ5-Δ4-lsomerase in Human Adrenals and Gonads
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编码人类肾上腺和性腺中几乎独有的 3β-羟基类固醇脱氢酶/Δ5-Δ4-异构酶的新互补 DNA 的结构和表达

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发表时间:
1991
期刊:
影响因子:
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通讯作者:
F. Labrie
F. Labrie
中科院分区:
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文献类型:
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作者:
É. Rhéaume;Y. Lachance;Huifen Zhao;N. Breton;M. Dumont;Y. Launoit;C. Trudel;V. Luu‐The;J. Simard;F. Labrie

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3-β-羟基类固醇脱氢酶/Δ5-Δ4异构酶(3-β-HSD)催化Δ-5-−-3-β-羟基类固醇前体氧化和异构化为Δ-4-酮类固醇,从而导致各种类固醇激素的形成。此外,3-β-HSD还催化3-β-羟基和3-酮-5-α-雄烷类固醇的相互转化。对3βHSD缺乏症患者的临床观察,以及我们最近以人胎盘3βHSD基因(I型)为探针进行Southern印迹分析的数据表明,存在多个相关的3βHSD同工酶。我们现在报告在筛选了人肾上腺βgt22A文库后,分离和鉴定了编码3λhsd的第二种类型的cDNA克隆(任意命名为类型II)。人3βHSD II型cDNA1676个碱基的核苷酸序列预测了一个由371个氨基酸组成的蛋白质,其分子质量为41,921道尔顿,与人胎盘I型和猕猴卵巢3βHSD的同源性分别为93.5%和96.2%。
The 3β-hydroxysteroid dehydrogenase/Δ5-Δ4 isomerase (3βHSD) enzyme catalyzes the oxidation and isomerization of Δ5−3β-hydroxysteroid precursors into Δ4-ketosteroids, thus leading to the formation of all classes of steroid hormones. In addition, 3βHSD catalyzes the interconversion of 3β-hydroxy- and 3-keto-5α-androstane steroids. Clinical observations in patients with 3βHSD deficiency as well as our recent data obtained by Southern blot analysis using a human placental 3βHSD cDNA (type I) as probe suggested the existence of multiple related 3βHSD isoenzymes. We now report the isolation and characterization of a second type of cDNA clone (arbitrarily designated type II) encoding 3βHSD after screening of a human adrenal λgt22A library. The nucleotide sequence of 1676 basepairs of human 3βHSD type II cDNA predicts a protein of 371 amino acids with a calculated molecular mass of 41,921 daltons, which displays 93.5% and 96.2% homology with human placental type I and rhesus macaque ovary 3βHSD deduced proteins, ...
DOI: 10.1073/pnas.84.14.4767
发表时间: 1987-07-01
影响因子: 11.1
作者:
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期刊: The Journal of clinical endocrinology and metabolism
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