STRUCTURE OF NF-KAPPA-B P50 HOMODIMER BOUND TO A KAPPA-B SITE

STRUCTURE OF NF-KAPPA-B P50 HOMODIMER BOUND TO A KAPPA-B SITE
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DOI:
10.1038/373303a0
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发表时间:
1995-01-26
期刊:
影响因子:
64.8
通讯作者:
SIGLER, PB
SIGLER, PB
中科院分区:
综合性期刊1区
文献类型:
--
作者:
GHOSH, G;VANDUYNE, G;SIGLER, PB

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与回文 kappa B 位点结合的转录因子 NF-kappa B p50 同二聚体的 2.3 埃晶体结构表明,Rel 同源区域折叠成两个不同的结构域,类似于免疫球蛋白超家族中的结构域。 p50 二聚体包裹着一个未扭曲的 B-DNA 螺旋,主要通过连接两个结构域中二级结构元件的环,沿着 10 碱基对 kappa B 识别位点进行特定接触。羧基末端结构域使用 Rel 家族中高度保守的残基在 β 片层之间形成二聚化界面。
The 2.3-Angstrom crystal structure of the transcription factor NF-kappa B p50 homodimer bound to a palindromic kappa B site reveals that the Rel homology region folds into two distinct domains, similar to those in the immunoglobulin superfamily. The p50 dimer envelopes an undistorted B-DNA helix, making specific contacts along the 10-base-pair kappa B recognition site mainly through loops connecting secondary structure elements in both domains. The carboxy-terminal domains form a dimerization interface between beta-sheets using residues that are strongly conserved in the Rel family.