2BDO

SOLUTION STRUCTURE OF HOLO-BIOTINYL DOMAIN FROM ACETYL COENZYME A CARBOXYLASE OF ESCHERICHIA COLI DETERMINED BY TRIPLE-RESONANCE NMR SPECTROSCOPY

2BDO の概要

• エントリーDOI: 10.2210/pdb2bdo/pdb
• NMR情報: BMRB: 4426
• 分子名称: PROTEIN (ACETYL-COA CARBOXYLASE), BIOTIN (2 entities in total)
• 機能のキーワード: biotin, biotinyl domain, acetyl coa carboxylase, swinging arm, nmr spectroscopy, protein structure
• 由来する生物種: Escherichia coli
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 8944.33

構造登録者

Roberts, E.L.,Shu, N.,Howard, M.J.,Broadhurst, R.W.,Chapman-Smith, A.,Wallace, J.C.,Morris, T.,Cronan, J.E.,Perham, R.N. (登録日: 1999-03-03, 公開日: 1999-04-27, 最終更新日: 2024-10-16)

主引用文献

Roberts, E.L.,Shu, N.,Howard, M.J.,Broadhurst, R.W.,Chapman-Smith, A.,Wallace, J.C.,Morris, T.,Cronan Jr., J.E.,Perham, R.N.
Solution structures of apo and holo biotinyl domains from acetyl coenzyme A carboxylase of Escherichia coli determined by triple-resonance nuclear magnetic resonance spectroscopy.
Biochemistry, 38:5045-5053, 1999

PubMed Abstract: A subgene encoding the 87 C-terminal amino acids of the biotinyl carboxy carrier protein (BCCP) from the acetyl CoA carboxylase of Escherichia coli was overexpressed and the apoprotein biotinylated in vitro. The structures of both the apo and holo forms of the biotinyl domain were determined by means of multidimensional NMR spectroscopy. That of the holo domain was well-defined, except for the 10 N-terminal residues, which form part of the flexible linker between the biotinyl and subunit-binding domains of BCCP. In agreement with X-ray crystallographic studies [Athappilly, F. K., and Hendrickson, W. A. (1995) Structure 3, 1407-1419], the structure comprises a flattened beta-barrel composed of two four-stranded beta-sheets with a 2-fold axis of quasi-symmetry and the biotinyl-lysine residue displayed in an exposed beta-turn on the side of the protein opposite from the N- and C-terminal residues. The biotin group is immobilized on the protein surface, with the ureido ring held down by interactions with a protruding polypeptide "thumb" formed by residues 94-101. However, at the site of carboxylation, no evidence could be found in solution for the predicted hydrogen bond between the main chain O of Thr94 and the ureido HN1'. The structure of the apo domain is essentially identical, although the packing of side chains is more favorable in the holo domain, and this may be reflected in differences in the dynamics of the two forms. The thumb region appears to be lacking in almost all other biotinyl domain sequences, and it may be that the immobilization of the biotinyl-lysine residue in the biotinyl domain of BCCP is an unusual requirement, needed for the catalytic reaction of acetyl CoA carboxylase.

PubMed: 10213607
DOI: 10.1021/bi982466o

実験手法

SOLUTION NMR