Metz-Boutigue M H, Reinbolt J, Ebel J P, Ehresmann C, Ehresmann B
Institut de Biologie Moléculaire et Cellulaire du CNRS, Strasbourg, France.
FEBS Lett. 1989 Mar 13;245(1-2):194-200. doi: 10.1016/0014-5793(89)80220-0.
In a preceding paper [(1987) Nucleic Acids Res. 15, 5787-5801], we have used trans-diamminedichloroplatinum (II) to induce reversible RNA-protein crosslinks within the ternary EF-Tu/GTP/Phe-tRNA(Phe) complex and have identified two crosslinking sites on the tRNA. The aim of the present paper is to determine the crosslinking sites on EF-Tu. Two tryptic peptides located in domain I could be identified, a major one (residues 45-74) and a minor one (residues 117-154). The use of Staphylococcus aureus V8 protease led to the isolation of two major peptides (residues 56-68 and 64-68) and one minor peptide (118-124). These results are discussed in the light of the current knowledge of the topography of the EF-Tu/tRNA complex.
在之前的一篇论文中[(1987年)《核酸研究》15卷,5787 - 5801页],我们使用反式二氯二氨铂(II)在三元EF - Tu/ GTP/苯丙氨酰 - tRNA(Phe)复合物中诱导可逆的RNA - 蛋白质交联,并确定了tRNA上的两个交联位点。本文的目的是确定EF - Tu上的交联位点。可以鉴定出位于结构域I中的两个胰蛋白酶肽段,一个主要肽段(第45 - 74位氨基酸残基)和一个次要肽段(第117 - 154位氨基酸残基)。使用金黄色葡萄球菌V8蛋白酶分离出两个主要肽段(第56 - 68位氨基酸残基和第64 - 68位氨基酸残基)和一个次要肽段(第118 - 124位氨基酸残基)。根据目前对EF - Tu/tRNA复合物拓扑结构的了解对这些结果进行了讨论。