Biblioteca de la Universidad Complutense de Madrid

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

Impacto



Reche, Pedro A y Howard, M J y Broadhurst, R W y Perham, R N (2000) Heteronuclear NMR studies of the specificity of the post-translational modification of biotinyl domains by biotinyl protein ligase. FEBS letters, 479 (3). pp. 93-8. ISSN 0014-5793

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URL Oficial: http://www.elsevier.com/wps/find/journaldescription.cws_home/506085/description#description



Resumen

The lipoyl domains of 2-oxo acid dehydrogenase multienzyme complexes and the biotinyl domains of biotin-dependent 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 15N-labelled biotinyl domain were recorded in the presence and absence of the ligase and backbone amide 1H and 15N chemical shifts were evaluated. Small, but significant, changes in chemical shift were found in two regions, including the tight beta-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.


Tipo de documento:Artículo
Palabras clave:Biotin; Biotinyl protein ligase; Protein domain; Molecular recognition; NMR spectroscopy
Materias:Ciencias Biomédicas > Biología > Bioquímica
Ciencias Biomédicas > Biología > Biotecnología
Ciencias Biomédicas > Biología > Biología molecular
Código ID:9348
Depositado:14 Aug 2009 10:23
Última Modificación:08 Oct 2009 13:44

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