1p2k
;Structural consequences of accommodation of four non-cognate amino-acid residues in the S1 pocket of bovine trypsin and chymotrypsin ;
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 | 1p2k |
| 沉积日期 deposition_date | 2003-04-15 |
| 结构标题 title | ;Structural consequences of accommodation of four non-cognate amino-acid residues in the S1 pocket of bovine trypsin and chymotrypsin ; |
| 关键词 keywords | ;trypsin; chymotrypsin; serine proteinase; bovine pancreatic trypsin inhibitor; protein-protein interaction; non-cognate binding; S1 pocket; primary specificity; crystal structure, hydrolase-hydrolase inhibitor COMPLEX ;; hydrolase/hydrolase inhibitor |
| 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 | 19.38 Å |
| 回转半径 Rg (电子) rg_electron | 18.42 Å |
| 零角强度 I(0) i0 | 17228300.00 |
| 分子量 molecular_weight | 30019.0 kDa |
| 排除体积 excluded_volume | 37000 ų |
| 包络体积 envelope_volume | 42149 ų |
| 水化壳体积 shell_volume | 19145 ų |
| 包络直径 envelope_diameter | 68.2 Å |
| 壳层 Rg shell_rg | 24.72 Å |
| 包络 Rg envelope_rg | 18.86 Å |
| 形状 Rg shape_rg | 18.40 Å |
| 总 Rg total_rg | 19.35 Å |
| 总原子数 total_atoms | 2092 |
| 残基数 n_residues | 278 |
| 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 | 64.4 Å |
| Rg (实空间) rg_real | 19.30 Å |
| Rg 误差 (实空间) rg_real_error | 0.40 Å |
| I(0) (实空间) i0_real | 1.7230e+07 |
| I(0) 误差 (实空间) i0_real_error | 1.9750e+05 |
| Rg (倒空间) rg_reciprocal | 19.32 Å |
| I(0) (倒空间) i0_reciprocal | 17230000.0000 |
| 解质量估计 total_estimate | 0.8042 |
| 解质量评级 solution_quality | GOOD a GOOD solution |
| P(r) 峰数 n_peaks | 3 |
| 主峰位置 r_peak_primary | 24.5 Å |
| 偏度 Skewness skewness | 0.254 |
| 峰度 Kurtosis kurtosis | -0.315 |
| 角度范围 angular_range | — – 0.4100 Å−1 |
| 当前正则化参数 α current_alpha | 0.0000 |
| 最高正则化参数 α highest_alpha | 5213000.0000 |
| 实空间数据点数 n_real_points | 72 |
| GNOM 版本 gnom_version | 4.1.3 |
| 质量判据 quality_criteria | AN1: 0.000; Oscil: 0.819; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.994; Smooth: 0.000 |
4. 晶体学与实验 4. Crystallography & Experiment
5. 实体与聚合体信息 (5)
6. 折叠分类 (SCOP + CATH) 5 domains
SCOP 2.08 (2 domains)
| 结构域编号 domain_id | d1p2ka_ |
| 类 Class class | b — All beta proteins |
| 折叠类型 Fold fold | b.47 — Trypsin-like serine proteases |
| 超家族 Superfamily superfamily | b.47.1 — Trypsin-like serine proteases |
| 家族 Family family | b.47.1.2 — Eukaryotic proteases |
| 结构域编号 domain_id | d1p2ki_ |
| 类 Class class | g — Small proteins |
| 折叠类型 Fold fold | g.8 — BPTI-like |
| 超家族 Superfamily superfamily | g.8.1 — BPTI-like |
| 家族 Family family | g.8.1.1 — Small Kunitz-type inhibitors & BPTI-like toxins |
CATH v4.4 (3 domains)
| 结构域编号 domain_id | 1p2kA01 |
| 类 Class class | 2 — Mainly Beta |
| 架构 Architecture architecture | 40 — Beta Barrel |
| 拓扑 Topology topology | 10 — Thrombin, subunit H |
| 同源超家族 H-superfamily homologous superfamily | 10 — Trypsin-like serine proteases |
| 结构域编号 domain_id | 1p2kA02 |
| 类 Class class | 2 — Mainly Beta |
| 架构 Architecture architecture | 40 — Beta Barrel |
| 拓扑 Topology topology | 10 — Thrombin, subunit H |
| 同源超家族 H-superfamily homologous superfamily | 10 — Trypsin-like serine proteases |
| 结构域编号 domain_id | 1p2kI00 |
| 类 Class class | 4 — Few Secondary Structures |
| 架构 Architecture architecture | 10 — Irregular |
| 拓扑 Topology topology | 410 — Factor Xa Inhibitor |
| 同源超家族 H-superfamily homologous superfamily | 10 — Pancreatic trypsin inhibitor Kunitz domain |