1kwg
Crystal structure of Thermus thermophilus A4 beta-galactosidase
SAXS 散射曲线 SAXS Profile
P(r) 距离分布 P(r) Distribution
1. 结构基本信息 1. Structure Basics
| 条目编号 entry_id | 1kwg |
| 沉积日期 deposition_date | 2002-01-29 |
| 结构标题 title | Crystal structure of Thermus thermophilus A4 beta-galactosidase |
| 关键词 keywords | TIM BARREL, GLYCOSIDE HYDROLASE FAMILY 42, TRIMER, HYDROLASE; HYDROLASE |
| 实验方法 method | X-RAY DIFFRACTION |
2. SAXS 参数 (CRYSOL 理论计算) 2. SAXS Parameters (CRYSOL)
| 回转半径 Rg (Guinier) rg_guinier | 26.60 Å |
| 回转半径 Rg (电子) rg_electron | 25.52 Å |
| 零角强度 I(0) i0 | 82815100.00 |
| 分子量 molecular_weight | 73180.0 kDa |
| 排除体积 excluded_volume | 92165 ų |
| 包络体积 envelope_volume | 105940 ų |
| 水化壳体积 shell_volume | 33563 ų |
| 包络直径 envelope_diameter | 86.5 Å |
| 壳层 Rg shell_rg | 33.89 Å |
| 包络 Rg envelope_rg | 25.66 Å |
| 形状 Rg shape_rg | 25.49 Å |
| 总 Rg total_rg | 26.46 Å |
| 总原子数 total_atoms | 5188 |
| 残基数 n_residues | 644 |
| 球谐函数阶数 n_harmonics | 20 |
| q 范围 q_range | — – 0.5000 Å−1 |
| 数据点数 n_points | 101 |
| 壳层类型 shell_type | directional |
| 溶剂电子密度 solvent_density | 0.3340 e/ų |
| 壳层衬度 contrast_shell | 0.0300 e/ų |
| CRYSOL 版本 crysol_version | 4.1.3 |
3. P(r) 距离分布 (GNOM 反演) 3. P(r) Analysis (GNOM)
| 最大尺寸 Dmax dmax | 81.7 Å |
| Rg (实空间) rg_real | 26.48 Å |
| Rg 误差 (实空间) rg_real_error | 0.47 Å |
| I(0) (实空间) i0_real | 8.2820e+07 |
| I(0) 误差 (实空间) i0_real_error | 1.2160e+06 |
| Rg (倒空间) rg_reciprocal | 26.51 Å |
| I(0) (倒空间) i0_reciprocal | 82820000.0000 |
| 解质量估计 total_estimate | 0.9096 |
| 解质量评级 solution_quality | EXCELLENT a EXCELLENT solution |
| P(r) 峰数 n_peaks | 2 |
| 主峰位置 r_peak_primary | 32.7 Å |
| 偏度 Skewness skewness | 0.204 |
| 峰度 Kurtosis kurtosis | -0.478 |
| 角度范围 angular_range | — – 0.3000 Å−1 |
| 当前正则化参数 α current_alpha | 0.0000 |
| 最高正则化参数 α highest_alpha | 23180000.0000 |
| 实空间数据点数 n_real_points | 61 |
| GNOM 版本 gnom_version | 4.1.3 |
| 质量判据 quality_criteria | AN1: 0.000; Oscil: 0.945; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.996; Smooth: 0.993 |
4. 晶体学与实验 4. Crystallography & Experiment
5. 实体与聚合体信息 (6)
6. 折叠分类 (SCOP + CATH) 6 domains
SCOP 2.08 (3 domains)
| 结构域编号 domain_id | d1kwga1 |
| 类 Class class | b — All beta proteins |
| 折叠类型 Fold fold | b.71 — Glycosyl hydrolase domain |
| 超家族 Superfamily superfamily | b.71.1 — Glycosyl hydrolase domain |
| 家族 Family family | b.71.1.1 — alpha-Amylases, C-terminal beta-sheet domain |
| 结构域编号 domain_id | d1kwga2 |
| 类 Class class | c — Alpha and beta proteins (a/b) |
| 折叠类型 Fold fold | c.1 — TIM beta/alpha-barrel |
| 超家族 Superfamily superfamily | c.1.8 — (Trans)glycosidases |
| 家族 Family family | c.1.8.1 — Amylase, catalytic domain |
| 结构域编号 domain_id | d1kwga3 |
| 类 Class class | c — Alpha and beta proteins (a/b) |
| 折叠类型 Fold fold | c.23 — Flavodoxin-like |
| 超家族 Superfamily superfamily | c.23.16 — Class I glutamine amidotransferase-like |
| 家族 Family family | c.23.16.5 — A4 beta-galactosidase middle domain |
CATH v4.4 (3 domains)
| 结构域编号 domain_id | 1kwgA01 |
| 类 Class class | 3 — Alpha Beta |
| 架构 Architecture architecture | 20 — Alpha-Beta Barrel |
| 拓扑 Topology topology | 20 — TIM Barrel |
| 同源超家族 H-superfamily homologous superfamily | 80 — Glycosidases |
| 结构域编号 domain_id | 1kwgA02 |
| 类 Class class | 3 — Alpha Beta |
| 架构 Architecture architecture | 40 — 3-Layer(aba) Sandwich |
| 拓扑 Topology topology | 50 — Rossmann fold |
| 同源超家族 H-superfamily homologous superfamily | 880 — Class I glutamine amidotransferase (GATase) domain |
| 结构域编号 domain_id | 1kwgA03 |
| 类 Class class | 2 — Mainly Beta |
| 架构 Architecture architecture | 60 — Sandwich |
| 拓扑 Topology topology | 40 — Immunoglobulin-like |
| 同源超家族 H-superfamily homologous superfamily | 1180 — Golgi alpha-mannosidase II |