+
データを開く
-
基本情報
登録情報 | データベース: PDB / ID: 4cu5 | ||||||
---|---|---|---|---|---|---|---|
タイトル | C-terminal domain of endolysin from phage CD27L is a trigger and release factor | ||||||
![]() | ENDOLYSIN | ||||||
![]() | HYDROLASE / BACTERIAL LYSIS / BACTERIOPHAGE / AUTOPROTEOLYSIS | ||||||
機能・相同性 | ![]() N-acetylmuramoyl-L-alanine amidase activity / peptidoglycan catabolic process / metal ion binding 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
手法 | ![]() ![]() ![]() | ||||||
![]() | Dunne, M. / Mertens, H.D.T. / Garefalaki, V. / Jeffries, C.M. / Thompson, A. / Lemke, E.A. / Svergun, D.I. / Mayer, M.J. / Narbad, A. / Meijers, R. | ||||||
![]() | ![]() タイトル: The CD27L and CTP1L endolysins targeting Clostridia contain a built-in trigger and release factor. 著者: Matthew Dunne / Haydyn D T Mertens / Vasiliki Garefalaki / Cy M Jeffries / Andrew Thompson / Edward A Lemke / Dmitri I Svergun / Melinda J Mayer / Arjan Narbad / Rob Meijers / ![]() ![]() ![]() 要旨: The bacteriophage ΦCD27 is capable of lysing Clostridium difficile, a pathogenic bacterium that is a major cause for nosocomial infection. A recombinant CD27L endolysin lyses C. difficile in vitro, ...The bacteriophage ΦCD27 is capable of lysing Clostridium difficile, a pathogenic bacterium that is a major cause for nosocomial infection. A recombinant CD27L endolysin lyses C. difficile in vitro, and represents a promising alternative as a bactericide. To better understand the lysis mechanism, we have determined the crystal structure of an autoproteolytic fragment of the CD27L endolysin. The structure covers the C-terminal domain of the endolysin, and represents a novel fold that is identified in a number of lysins that target Clostridia bacteria. The structure indicates endolysin cleavage occurs at the stem of the linker connecting the catalytic domain with the C-terminal domain. We also solved the crystal structure of the C-terminal domain of a slow cleaving mutant of the CTP1L endolysin that targets C. tyrobutyricum. Two distinct dimerization modes are observed in the crystal structures for both endolysins, despite a sequence identity of only 22% between the domains. The dimers are validated to be present for the full length protein in solution by right angle light scattering, small angle X-ray scattering and cross-linking experiments using the cross-linking amino acid p-benzoyl-L-phenylalanine (pBpa). Mutagenesis on residues contributing to the dimer interfaces indicates that there is a link between the dimerization modes and the autocleavage mechanism. We show that for the CTP1L endolysin, there is a reduction in lysis efficiency that is proportional to the cleavage efficiency. We propose a model for endolysin triggering, where the extended dimer presents the inactive state, and a switch to the side-by-side dimer triggers the cleavage of the C-terminal domain. This leads to the release of the catalytic portion of the endolysin, enabling the efficient digestion of the bacterial cell wall. | ||||||
履歴 |
|
-
構造の表示
構造ビューア | 分子: ![]() ![]() |
---|
-
ダウンロードとリンク
-
ダウンロード
PDBx/mmCIF形式 | ![]() | 117.1 KB | 表示 | ![]() |
---|---|---|---|---|
PDB形式 | ![]() | 94.3 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
---|
-関連構造データ
-
リンク
-
集合体
登録構造単位 | ![]()
| ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | ![]()
| ||||||||||||||||||||||||
2 | ![]()
| ||||||||||||||||||||||||
3 | ![]()
| ||||||||||||||||||||||||
4 | ![]()
| ||||||||||||||||||||||||
単位格子 |
| ||||||||||||||||||||||||
非結晶学的対称性 (NCS) | NCS oper:
|
-
要素
#1: タンパク質 | 分子量: 9598.022 Da / 分子数: 6 / 断片: C-TERMINAL DOMAIN, RESIDUES 186-270 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 発現宿主: ![]() ![]() #2: 水 | ChemComp-HOH / | |
---|
-実験情報
-実験
実験 | 手法: ![]() |
---|
-
試料調製
結晶 | マシュー密度: 2.3 Å3/Da / 溶媒含有率: 46 % / 解説: NONE |
---|---|
結晶化 | pH: 8 / 詳細: 10 % PEG 20K AND 20 MM TRIS PH 8.0 |
-データ収集
回折 | 平均測定温度: 100 K |
---|---|
放射光源 | 由来: ![]() ![]() ![]() |
検出器 | タイプ: ADSC QUANTUM 315r / 検出器: CCD / 詳細: KB MIRRORS |
放射 | モノクロメーター: SI 1 1 1 / プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 波長: 0.97 Å / 相対比: 1 |
反射 | 解像度: 2.24→30 Å / Num. obs: 24189 / % possible obs: 97.9 % / Observed criterion σ(I): 0 / 冗長度: 2.7 % / Rmerge(I) obs: 0.13 / Net I/σ(I): 7 |
反射 シェル | 解像度: 2.24→2.37 Å / 冗長度: 2.6 % / Rmerge(I) obs: 0.6 / Mean I/σ(I) obs: 2 / % possible all: 93.8 |
-
解析
ソフトウェア |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
精密化 | 構造決定の手法: ![]() 開始モデル: NONE 解像度: 2.24→33.1 Å / Cor.coef. Fo:Fc: 0.95 / Cor.coef. Fo:Fc free: 0.909 / SU B: 7.392 / SU ML: 0.182 / 交差検証法: THROUGHOUT / ESU R: 0.354 / ESU R Free: 0.242 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD / 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
溶媒の処理 | イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 33.874 Å2
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 解像度: 2.24→33.1 Å
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
拘束条件 |
|