3D8L

Crystal structure of ORF12 from the lactococcus lactis bacteriophage p2

3D8L の概要

• エントリーDOI: 10.2210/pdb3d8l/pdb
• 分子名称: ORF12 (2 entities in total)
• 機能のキーワード: lactococcal phage p2, orf12, viral protein
• 由来する生物種: Lactococcus phage p2
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 31698.02

構造登録者

Siponen, M.I.,Spinelli, S.,Lichiere, J.,Moineau, S.,Cambillau, C.,Campanacci, V. (登録日: 2008-05-23, 公開日: 2009-04-14, 最終更新日: 2024-03-20)

主引用文献

Siponen, M.,Sciara, G.,Villion, M.,Spinelli, S.,Cambillau, C.,Moineau, S.,Campanacci, V.
Crystal structure of ORF12 from Lactococcus lactis phage p2 identifies a tape measure protein chaperone
J.Bacteriol., 191:728-734, 2009

PubMed Abstract: We report here the characterization of the nonstructural protein ORF12 of the virulent lactococcal phage p2, which belongs to the Siphoviridae family. ORF12 was produced as a soluble protein, which forms large oligomers (6- to 15-mers) in solution. Using anti-ORF12 antibodies, we have confirmed that ORF12 is not found in the virion structure but is detected in the second half of the lytic cycle, indicating that it is a late-expressed protein. The structure of ORF12, solved by single anomalous diffraction and refined at 2.9-A resolution, revealed a previously unknown fold as well as the presence of a hydrophobic patch at its surface. Furthermore, crystal packing of ORF12 formed long spirals in which a hydrophobic, continuous crevice was identified. This crevice exhibited a repeated motif of aromatic residues, which coincided with the same repeated motif usually found in tape measure protein (TMP), predicted to form helices. A model of a complex between ORF12 and a repeated motif of the TMP of phage p2 (ORF14) was generated, in which the TMP helix fitted exquisitely in the crevice and the aromatic patches of ORF12. We suggest, therefore, that ORF12 might act as a chaperone for TMP hydrophobic repeats, maintaining TMP in solution during the tail assembly of the lactococcal siphophage p2.

PubMed: 19047351
DOI: 10.1128/JB.01363-08

実験手法

X-RAY DIFFRACTION (2.9 Å)