Elongin from Saccharomyces cerevisiae *

Elongin from Saccharomyces cerevisiae *
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来自酿酒酵母的延长素*

DOI:
--
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发表时间:
2000
影响因子:
4.8
通讯作者:
A. Edwards
A. Edwards
中科院分区:
生物学2区
文献类型:
--
作者:
C. Koth;M. Botuyan;R. Moreland;D. B. Jansma;J. Conaway;R. Conaway;W. Chazin;J. Friesen;C. Arrowsmith;A. Edwards

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Elongin 是一种转录延伸因子,首先在哺乳动物系统中发现,由三个亚基 elongin A、B 和 C 组成。在酵母基因组中发现了 elongin A 和 elongin C 的序列同源物,但没有发现 elongin B。酵母延长蛋白 A 和 C 序列同源物都不是细胞活力所必需的。这两种基因产物可以作为复合物从酵母中纯化。该复合物的重组形式只能在基因产物共表达的情况下在细菌中产生,并通过几个色谱步骤进行纯化。该复合物不会刺激酵母 RNA 聚合酶 II 的转录延伸。使用有限的蛋白水解,酵母伸长蛋白 A 的 N 端 144 个残基被证明足以与酵母伸长蛋白 C 相互作用。使用圆二色性和核磁光谱分析了酵母伸长蛋白 C/伸长蛋白 A1-143 的纯化复合物。这些研究表明,在存在延伸蛋白 C 的情况下,酵母延伸蛋白 A 是未折叠的,但其结构发生了显着的改变,并且在延伸蛋白 A 不存在的情况下,延伸蛋白 C 形成了稳定的二聚体。
Elongin is a transcription elongation factor that was first identified in mammalian systems and is composed of the three subunits, elongin A, B, and C. Sequence homologues of elongin A and elongin C, but not elongin B, were identified in the yeast genome. Neither yeast elongin A nor C sequence homologues was required for cell viability. The two gene products could be purified from yeast as a complex. A recombinant form of the complex, which could only be produced in bacteria if the gene products were co-expressed, was purified over several chromatographic steps. The complex did not stimulate transcription elongation by yeast RNA polymerase II. Using limited proteolysis, the N-terminal 144 residues of yeast elongin A were shown to be sufficient for interaction with yeast elongin C. The purified complex of yeast elongin C/elongin A1–143was analyzed using circular dichroism and nuclear magnetic spectroscopy. These studies revealed that yeast elongin A is unfolded but undergoes a dramatic modification of its structure in the presence of elongin C, and that elongin C forms a stable dimer in the absence of elongin A.
DMC1 在酿酒酵母减数分裂途径中发挥作用,该途径很大程度上独立于 RAD51 途径。
DOI: 10.1093/genetics/147.2.533
发表时间: 1997
期刊: Genetics
影响因子: 3.3
作者:
Dresser,ME;Ewing,DJ;Conrad,MN;Dominguez,AM;Barstead,R;Jiang,H;Kodadek,T
通讯作者: Kodadek,T
纯化的延伸因子 SII 足以促进纯化的 RNA 聚合酶 II 在人组蛋白 H3.3 基因的特定终止位点处的通读。
DOI: --
发表时间: 1990
期刊: The Journal of biological chemistry
影响因子: --
作者:
SivaRaman,L;Reines,D;Kane,CM
通讯作者: Kane,CM
DOI: 10.1006/jmbi.1994.1185
发表时间: 1994-02
影响因子: 5.6
作者:
J. Mote;Pejman Ghanouni;D. Reines
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DOI: 10.1073/pnas.92.16.7172
发表时间: 1995-08-01
影响因子: 11.1
作者:
GARRETT, KP;ASO, T;CONAWAY, JW
通讯作者: CONAWAY, JW
DOI: 10.1016/s0021-9258(19)74431-7
发表时间: 1993-12
期刊: The Journal of biological chemistry
影响因子: --
作者:
J. Bradsher;K. Jackson;R. Conaway;J. Conaway
通讯作者: J. Bradsher;K. Jackson;R. Conaway;J. Conaway