2KXX

NMR Structure of Escherichia coli BamE, a Lipoprotein Component of the beta-Barrel Assembly Machinery Complex

2KXX の概要

• エントリーDOI: 10.2210/pdb2kxx/pdb
• NMR情報: BMRB: 16926
• 分子名称: Small protein A (1 entity in total)
• 機能のキーワード: e coli protein, lipoprotein, protein binding
• 由来する生物種: Escherichia coli K-12
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 10701.88

構造登録者

Kim, K.,Okon, M.,Escobar, E.,Kang, H.,McIntosh, L.,Paetzel, M. (登録日: 2010-05-13, 公開日: 2011-01-12, 最終更新日: 2024-05-15)

主引用文献

Kim, K.H.,Kang, H.S.,Okon, M.,Escobar-Cabrera, E.,McIntosh, L.P.,Paetzel, M.
Structural Characterization of Escherichia coli BamE, a Lipoprotein Component of the beta-Barrel Assembly Machinery Complex.
Biochemistry, 50:1081-1090, 2011

PubMed Abstract: In Escherichia coli, the BAM complex catalyzes the essential process of assembling outer membrane proteins (OMPs). This complex consists of five proteins: one membrane-bound protein, BamA, and four lipoproteins, BamB, BamC, BamD, and BamE. Despite their importance in OMP biogenesis, there is currently a lack of functional and structural information on the BAM complex lipoproteins. BamE is the smallest but most conserved lipoprotein in the complex. The structural and dynamic properties of monomeric BamE (residues 21-133) were determined by NMR spectroscopy. The protein folds as two α-helices packed against a three-stranded antiparallel β-sheet. The N-terminal (Ser21-Thr39) and C-terminal (Pro108-Asn113) residues, as well as a β-hairpin loop (Val76-Gln89), are highly flexible on the subnanosecond time scale. BamE expressed and purified from E. coli also exists in a kinetically trapped dimeric state that has dramatically different NMR spectra, and hence structural features, relative to its monomeric form. The functional significance of the BamE dimer remains to be established. Structural comparison to proteins with a similar architecture suggests that BamE may play a role in mediating the association of the BAM complex or with the BAM complex substrates.

PubMed: 21207987
DOI: 10.1021/bi101659u

実験手法

SOLUTION NMR