The 1.35 A resolution structure of the phosphatase domain of the suppressor of T-cell receptor signaling protein in complex with sulfate.

The 1.35 A resolution structure of the phosphatase domain of the suppressor of T-cell receptor signaling protein in complex with sulfate.
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T 细胞受体信号蛋白抑制因子与硫酸盐复合物的磷酸酶结构域的 1.35 A 解析结构。

DOI:
10.1107/s1744309110014259
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发表时间:
2010
期刊:
Acta crystallographica. Section F, Structural biology and crystallization communications
影响因子:
--
通讯作者:
Nassar,Nicolas
Nassar,Nicolas
中科院分区:
--
文献类型:
--
作者:
Jakoncic,Jean;Sondgeroth,Benjamin;Carpino,Nick;Nassar,Nicolas

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T细胞信号传导抑制因子(Sts)蛋白是负调节膜结合受体(包括T细胞受体(TCR)和表皮生长因子受体(EGFR))的信号传导的多结构域蛋白。它们在其C-末端含有2 H-磷酸酶同源(PGM)结构域,该结构域负责其蛋白酪氨酸磷酸酶活性。在此,在pH 4.6下测定Sts-1磷酸酶结构域Sts-1 PGM的晶体结构。不对称单元包含两个独立的分子,每个活性位点被一个硫酸根离子占据。每个硫酸盐位于磷酸盐结合位点,并与催化残基进行类似的相互作用。该结构表明在酸性pH下较低的Michaelis-Menten常数的解释。
The suppressor of T-cell signaling (Sts) proteins are multidomain proteins that negatively regulate the signaling of membrane-bound receptors, including the T-cell receptor (TCR) and the epidermal growth-factor receptor (EGFR). They contain at their C-terminus a 2H-phosphatase homology (PGM) domain that is responsible for their protein tyrosine phosphatase activity. Here, the crystal structure of the phosphatase domain of Sts-1, Sts-1PGM, was determined at pH 4.6. The asymmetric unit contains two independent molecules and each active site is occupied by a sulfate ion. Each sulfate is located at the phosphate-binding site and makes similar interactions with the catalytic residues. The structure suggests an explanation for the lower Michaelis–Menten constants at acidic pH.
DOI: 10.15288/jsa.1977.38.512
发表时间: 1977
期刊: Journal of studies on alcohol
影响因子: --
作者:
K. Wanberg;J. Horn;F. M. Foster
通讯作者: F. M. Foster
DOI: --
发表时间: 1977
期刊: Journal of Studies on Alcohol
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DOI: --
发表时间: 1975
期刊: Journal of Studies on Alcohol
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影响因子: 5.9
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