X線回折 / シンクロトロン / THE INITIAL MODEL WAS OBTAINED FROM A COMBINATION OF MULTI-WAVELENGTH ANOMALOUS DIFFRACTION (MAD), REAL SPACE AVERAGING TECHNIQUES. THE MAD DATA WAS TAKEN AT THE MERCURY L(III) EDGE AT 3 DIFFERENT WAVELENGTHS (CHESS BEAMLINE F2). REAL SPACE AVERAGING WAS USED TO IMPROVE THE MAPS. / 解像度: 2 Å
THE ASYMMETRIC UNIT (MOLECULES A AND B) CONTAINS A CALCIUM MEDIATED DIMER. BOTH MOLECULES IN THE ASYMMETRIC UNIT CONTAIN THREE CALCIUM IONS (CA 2+) AND ONE MERCURY ATOM (HG). THE MERCURY ATOMS ARE BOUND TO AN EXPOSED CYSTEINE RESIDUE IN THE N-TERMINAL DOMAIN.
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要素
#1: タンパク質
E-CADHERIN / EPITHELIAL CADHERIN DOMAINS 1 AND 2 / ECAD12
pH: 9 詳細: 1.2 M AMMONIUM SULFATE 0.01 M CALCIUM CHLORIDE 0.1 M TRIS-HCL BUFFER, PH 9.0 0.003 M SODIUM AZIDE
結晶化
*PLUS
pH: 7.25 / 手法: 蒸気拡散法
溶液の組成
*PLUS
ID
濃度
一般名
Crystal-ID
Sol-ID
1
11mg/ml
protein
1
drop
2
20mM
Tris-HCl
1
drop
3
5mM
dithiothreitol
1
drop
4
0.05mM
sodiumazide
1
drop
5
1.2M
ammoniumsulfate
1
reservoir
6
5-10 mM
calciumchloride
1
reservoir
7
100mM
Tris-HCl
1
reservoir
8
3mM
sodiumazide
1
reservoir
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データ収集
回折
平均測定温度: 113 K
放射光源
由来: シンクロトロン / サイト: CHESS / ビームライン: A1 / 波長: 0.908
検出器
タイプ: PRINCETON 2K / 検出器: CCD / 日付: 1995年4月3日
放射
モノクロメーター: SI(111) / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray
放射波長
波長: 0.908 Å / 相対比: 1
反射
解像度: 2→22 Å / Num. obs: 37605 / % possible obs: 88.3 % / Observed criterion σ(I): 2 / 冗長度: 2.3 % / Biso Wilson estimate: 26.08 Å2 / Rsym value: 0.053 / Net I/σ(I): 13
反射 シェル
解像度: 2→2.07 Å / 冗長度: 1.59 % / Rsym value: 0.146 / % possible all: 63.6
反射
*PLUS
Num. measured all: 86202 / Rmerge(I) obs: 0.053
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解析
ソフトウェア
名称
バージョン
分類
PHASES
位相決定
X-PLOR
3.1
精密化
DENZO
データ削減
SCALEPACK
データスケーリング
精密化
構造決定の手法: THE INITIAL MODEL WAS OBTAINED FROM A COMBINATION OF MULTI-WAVELENGTH ANOMALOUS DIFFRACTION (MAD), REAL SPACE AVERAGING TECHNIQUES. THE MAD DATA WAS TAKEN AT THE MERCURY L(III) ...構造決定の手法: THE INITIAL MODEL WAS OBTAINED FROM A COMBINATION OF MULTI-WAVELENGTH ANOMALOUS DIFFRACTION (MAD), REAL SPACE AVERAGING TECHNIQUES. THE MAD DATA WAS TAKEN AT THE MERCURY L(III) EDGE AT 3 DIFFERENT WAVELENGTHS (CHESS BEAMLINE F2). REAL SPACE AVERAGING WAS USED TO IMPROVE THE MAPS. 解像度: 2→5 Å / Data cutoff high absF: 83.4 / σ(F): 2 詳細: THE ELECTRON DENSITY FOR THE LOOP BETWEEN STRANDS B AND C (RESIDUES 27 - 32) IS WEAK.