1PRB

STRUCTURE OF AN ALBUMIN-BINDING DOMAIN, NMR, MINIMIZED AVERAGE STRUCTURE

1PRB の概要

• エントリーDOI: 10.2210/pdb1prb/pdb
• 分子名称: PROTEIN PAB (1 entity in total)
• 機能のキーワード: albumin-binding protein, bacterial surface proteins, evolution, module shuffling
• 由来する生物種: Finegoldia magna ATCC 29328
• 細胞内の位置: Secreted, cell wall; Peptidoglycan-anchor (Potential): Q51911
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 5939.79

構造登録者

Johansson, M.U.,De Chateau, M.,Wikstrom, M.,Forsen, S.,Drakenberg, T.,Bjorck, L. (登録日: 1997-01-15, 公開日: 1997-07-23, 最終更新日: 2024-05-22)

主引用文献

Johansson, M.U.,de Chateau, M.,Wikstrom, M.,Forsen, S.,Drakenberg, T.,Bjorck, L.
Solution structure of the albumin-binding GA module: a versatile bacterial protein domain.
J.Mol.Biol., 266:859-865, 1997

PubMed Abstract: The albumin-binding GA module is found in a family of surface proteins of different bacterial species. It comprises 45 amino acid residues and represents the first known example of contemporary module shuffling. Using 1H NMR spectroscopy we have determined the solution structure of the GA module from protein PAB, a protein of the anaerobic human commensal and pathogen Peptostreptococcus magnus. This structure, the first three-dimensional structure of an albumin-binding protein domain described, was shown to be composed of a left-handed three-helix-bundle. Sequence differences between GA modules with different affinities for albumin indicated that a conserved region in the C-terminal part of the second helix and the flexible sequence between helices 2 and 3 could contribute to the albumin-binding activity. The effect on backbone amide proton exchange rates upon binding to albumin support this assumption. The GA module has a fold that is strikingly similar to the immunoglobulin-binding domains of staphylococcal protein A but it shows no resemblance to the fold shared by the immunoglobulin-binding domains of streptococcal protein G and peptostreptococcal protein L. When the gene sequences, binding properties and thermal stability of these four domains are analysed in relation to their global folds an evolutionary pattern emerges. Thus, in the evolution of novel binding properties mutations are allowed only as long as the energetically favourable global fold is maintained.

PubMed: 9086265
DOI: 10.1006/jmbi.1996.0856

実験手法

SOLUTION NMR