NH2-terminal sequence analyses of four rat hepatic microsomal cytochromes P-450.

NH2-terminal sequence analyses of four rat hepatic microsomal cytochromes P-450.
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四种大鼠肝微粒体细胞色素 P-450 的 NH2 末端序列分析。

DOI:
10.1016/0003-9861(84)90202-9
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发表时间:
1984
影响因子:
3.9
通讯作者:
Shively,JE
Shively,JE
中科院分区:
生物学3区
文献类型:
--
作者:
Haniu,M;Ryan,DE;Iida,S;Lieber,CS;Levin,W;Shively,JE

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CytochromesP-450f,P-450g,P-450h和p -450i是从成年大鼠中纯化的四种肝微粒体血红蛋白。虽然cytochromep -450g和p -450h似乎是雄性特异性的血红蛋白,但cytochromeP-450i显然是从未治疗的成年雌性大鼠中纯化的雌性特异性酶。从成年雄性和雌性大鼠中纯化了细胞色素p -450f,回收率相当。在目前的研究中,已经完成了这些细胞色素sp -450的前15-20个氨基酸残基的氨基末端序列分析。每个蛋白都有一个疏水先导序列,由65-87%的疏水氨基酸组成,在氨末端区域只有一个带电氨基酸(Asp)。虽然细胞色素sp -450f、P-450g、P-450h和p -450i的氨基末端序列存在差异,但这些血红蛋白都以Met-Asp开头,并且在某些酶之间观察到明显的结构同源性。两种男性特异性蛋白cytochromep -450g和p -450h与女性特异性同工酶cytochromeP-450i具有11-12/15个相同的残基。CytochromesP-450f和p -450h具有16/20个相同的氨基末端残基。与大鼠肝细胞色素sp -450a-e相比,细胞色素sp -450f-i的氨基末端序列只有有限的同源性。结果表明,细胞色素p -450f、P-450g、P-450h和p -450i之间以及另外5种大鼠肝微粒体细胞色素p -450同工酶(P-450a-e)之间存在同工酶关系。
CytochromesP-450f,P-450g,P-450h, andP-450i are four hepatic microsomal hemoproteins that have been purified from adult rats. Whereas cytochromesP-450g andP-450h appear to be male-specific hemoproteins, cytochromeP-450i is apparently a female-specific enzyme purified from untreated adult female rats. CytochromeP-450f has been purified from adult male and female rats with equivalent recoveries. Amino-terminal sequence analyses of the first 15–20 amino acid residues of each of these cytochromesP-450 has been accomplished in the current investigation. Each protein possesses a hydrophobic leader sequence consisting of 65–87% hydrophobic amino acids, and only one charged amino acid (Asp) in the ammo-terminal region. Although differences in the amino-terminal sequences of cytochromesP-450f,P-450g,P-450h, andP-450i are identified, these hemoproteins all begin with Met-Asp, and marked structural homology is observed among certain of these enzymes. CytochromesP-450g andP-450h, two male-specific proteins, have 11–12/15 identical residues with cytochromeP-450i, a female-specific isozyme. CytochromesP-450f andP-450h have 16/20 identical amino-terminal residues. Only limited sequence homology is observed between the amino-terminal sequences of cytochromesP-450f-i compared to rat liver cytochromesP-450a-e. The results demonstrate that cytochromesP-450f,P-450g,P-450h, andP-450i are isozymic to each other and five additional rat hepatic microsomal cytochromeP-450 isozymes (P-450a-e).
DOI: 10.1073/pnas.77.6.3360
发表时间: 1980-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
KAO, TH;CROTHERS, DM
通讯作者: CROTHERS, DM
开放和闭合 5S 核糖体 RNA,这是核苷酸序列中编码的唯一两种通用结构。
DOI: 10.1016/s0022-2836(83)80172-7
发表时间: 1983
影响因子: 5.6
作者:
Edward N. Trifonov;G. Bolshoi
通讯作者: G. Bolshoi
核 Overhauser 在 500 MHz 下对 5S 核糖核酸及其与核糖体蛋白 L25 的复合物的低场质子光谱进行实验。
DOI: 10.1021/bi00280a005
发表时间: 1983
期刊: Biochemistry
影响因子: 2.9
作者:
Kime,MJ;Moore,PB
通讯作者: Moore,PB
DOI: 10.1073/pnas.61.1.292
发表时间: 1968-01-01
影响因子: 11.1
作者:
AUBERT, M;SCOTT, JF;MONIER, R
通讯作者: MONIER, R
核糖核蛋白复合物的核酸酶保护分析:使用细胞毒性核糖核酸酶 α-sarcin 确定大肠杆菌核糖体蛋白 L5、L18 和 L25 在 5S rRNA 上的结合位点。
DOI: 10.1073/pnas.81.2.322
发表时间: 1984
影响因子: 11.1
作者:
Huber,PW;Wool,IG
通讯作者: Wool,IG