- PDB-3htn: Crystal structure of a putative dna binding protein (bt_1116) fro... -
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基本情報
登録情報
データベース: PDB / ID: 3htn
タイトル
Crystal structure of a putative dna binding protein (bt_1116) from bacteroides thetaiotaomicron vpi-5482 at 1.50 A resolution
要素
Putative DNA binding protein
キーワード
METAL BINDING PROTEIN / Duf269 family protein / structural genomics / Joint Center for Structural Genomics / JCSG / Protein Structure Initiative / PSI-2
THE CONSTRUCT WAS EXPRESSED WITH A PURIFICATION TAG MGSDKIHHHHHHENLYFQG. THE TAG WAS REMOVED WITH ...THE CONSTRUCT WAS EXPRESSED WITH A PURIFICATION TAG MGSDKIHHHHHHENLYFQG. THE TAG WAS REMOVED WITH TEV PROTEASE LEAVING ONLY A GLYCINE (0) FOLLOWED BY THE TARGET SEQUENCE. THE CLONED CONSTRUCT CONTAINS RESIDUES 38-185 OF THE FULL LENGTH PROTEIN.
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実験情報
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実験
実験
手法: X線回折 / 使用した結晶の数: 1
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試料調製
結晶
マシュー密度: 2.53 Å3/Da / 溶媒含有率: 51.31 %
結晶化
温度: 277 K / pH: 8 詳細: 34.0000% polyethylene glycol 400, 0.2000M lithium sulfate, 0.1M TRIS pH 8.0, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K
モノクロメーター: SINGLE CRYSTAL SI(111) BENT MONOCHROMATOR (HORIZONTAL FOCUSING) プロトコル: MAD / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray
放射波長
ID
波長 (Å)
相対比
1
0.91837
1
2
0.97908
1
3
0.9784
1
反射
解像度: 1.5→29.683 Å / Num. obs: 79258 / % possible obs: 97.1 % / Observed criterion σ(I): -3 / 冗長度: 3.77 % / Biso Wilson estimate: 16.81 Å2 / Rmerge(I) obs: 0.048 / Net I/σ(I): 10.56
反射 シェル
解像度: 1.5→1.55 Å / Rmerge(I) obs: 0.552 / Mean I/σ(I) obs: 1.6 / % possible all: 95.2
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位相決定
位相決定
手法: 多波長異常分散
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解析
ソフトウェア
名称
バージョン
分類
NB
REFMAC
5.2.0019
精密化
PHENIX
精密化
SHELX
位相決定
MolProbity
3beta29
モデル構築
XSCALE
データスケーリング
PDB_EXTRACT
3.006
データ抽出
XDS
データ削減
SHELXD
位相決定
autoSHARP
位相決定
精密化
構造決定の手法: 多波長異常分散 / 解像度: 1.5→29.68 Å / Cor.coef. Fo:Fc: 0.977 / Cor.coef. Fo:Fc free: 0.969 / Occupancy max: 1 / Occupancy min: 0.2 / SU B: 2.266 / SU ML: 0.043 / TLS residual ADP flag: LIKELY RESIDUAL / 交差検証法: THROUGHOUT / σ(F): 0 / ESU R: 0.059 / ESU R Free: 0.061 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: 1.HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. 2.ATOM RECORD CONTAINS RESIDUAL B FACTORS ONLY. 3.A MET-INHIBITION PROTOCOL WAS USED FOR SELENOMETHIONINE INCORPORATION DURING PROTEIN ...詳細: 1.HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. 2.ATOM RECORD CONTAINS RESIDUAL B FACTORS ONLY. 3.A MET-INHIBITION PROTOCOL WAS USED FOR SELENOMETHIONINE INCORPORATION DURING PROTEIN EXPRESSION. THE OCCUPANCY OF THE SE ATOMS IN THE MSE RESIDUES WAS REDUCED TO 0.75 TO ACCOUNT FOR THE REDUCED SCATTERING POWER DUE TO PARTIAL S-MET INCORPORATION. 4.SULPHATE ANIONS AND PEG MOLECULES FROM CRYSTALLIZATION ARE MODELED IN THE STRUCTURE, RESPECTIVELY. 5.NI AND FE METAL IONS FROM PROTEIN EXPRESSION AND PURIFICATION ARE MODELED IN THE STRUCTURE. THE PRESENCE OF NI AND FE ARE SUPPORTED BY X-RAY FLUORESCENCE, BINDING GEOMETRY AND ANOMALOUS DIFFERENCE FOURIERS ABOVE AND BELOW THE NI AND FE ABSORPTION EDGE, RESPECTIVELY.
Rfactor
反射数
%反射
Selection details
Rfree
0.167
3974
5 %
RANDOM
Rwork
0.143
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obs
0.145
79234
99.8 %
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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: BABINET MODEL WITH MASK