Heteronuclear NMR studies of the specificity of the post-translational modification of biotinyl domains by biotinyl protein ligase

被引:16
作者
Reche, PA [1 ]
Howard, MJ [1 ]
Broadhurst, RW [1 ]
Perham, RN [1 ]
机构
[1] Univ Cambridge, Dept Biochem, Cambridge Ctr Mol Recognit, Cambridge CB2 1GA, England
来源
FEBS LETTERS | 2000年 / 479卷 / 03期
基金
英国惠康基金; 英国生物技术与生命科学研究理事会;
关键词
biotin; biotinyl protein ligase; protein domain; molecular recognition; NMR spectroscopy;
D O I
10.1016/S0014-5793(00)01829-9
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The lipoyl domains of 2-oxo acid dehydrogenase multienzyme complexes and the biotinyl domains of biotindependent enzymes have homologous structures, but the target lysine residue in each domain is correctly selected for posttranslational modification by lipoyl protein ligase and biotinyl protein ligase, respectively. We have applied two-dimensional heteronuclear NMR spectroscopy to investigate the interaction between the apo form of the biotinyl domain of the biotin carboxyl carrier protein of acetyl-CoA carboxylase and the biotinyl protein ligase (BPL) from Escherichia coli, Heteronuclear multiple quantum coherence NMR spectra of the N-15- labelled biotinyl domain were recorded in the presence and absence of the ligase and backbone amide H-1 and N-15 chemical shifts were evaluated. Small, but significant, changes in chemical shift were found in two regions, including the tight p-turn that houses the lysine residue targetted for biotinylation, and the beta-strand 2 and the loop that precedes it in the domain. When compared with the three-dimensional structure, sequence alignments of other biotinyl and lipoyl domains, and mutagenesis data, these results give a clear indication of how the biotinyl domain is both recognised by BPL and distinguished from the structurally related lipoyl domain to ensure correct posttranslational modification. (C) 2000 Federation of European Biochemical Societies. Published br Elsevier Science B,V, All rights reserved.
引用
收藏
页码:93 / 98
页数:6
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