2it8
Solution structure of a linear analog of the cyclic squash trypsin inhibitor MCoTI-II
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 | 2it8 |
| 沉积日期 deposition_date | 2006-10-19 |
| 结构标题 title | Solution structure of a linear analog of the cyclic squash trypsin inhibitor MCoTI-II |
| 关键词 keywords | PLANT PROTEIN ANALOG, KNOTTIN, CYSTINE-KNOT, 3-10 HELIX, TRIPLE-STRANDED ANTI-PARALLEL BETA-SHEET, PLANT PROTEIN; PLANT PROTEIN |
| 实验方法 method | SOLUTION NMR |
2. SAXS 参数 (CRYSOL 理论计算) 2. SAXS Parameters (CRYSOL)
| 回转半径 Rg (Guinier) rg_guinier | 7.46 Å |
| 回转半径 Rg (电子) rg_electron | 8.22 Å |
| 零角强度 I(0) i0 | 155142000.00 |
| 分子量 molecular_weight | 92301.0 kDa |
| 排除体积 excluded_volume | 110930 ų |
| 包络体积 envelope_volume | 6624 ų |
| 水化壳体积 shell_volume | 6178 ų |
| 包络直径 envelope_diameter | 34.1 Å |
| 壳层 Rg shell_rg | 14.66 Å |
| 包络 Rg envelope_rg | 10.30 Å |
| 形状 Rg shape_rg | 8.24 Å |
| 总 Rg total_rg | 8.29 Å |
| 总原子数 total_atoms | 12570 |
| 残基数 n_residues | 870 |
| 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 | 22.8 Å |
| Rg (实空间) rg_real | 7.52 Å |
| Rg 误差 (实空间) rg_real_error | 0.04 Å |
| I(0) (实空间) i0_real | 1.5360e+08 |
| I(0) 误差 (实空间) i0_real_error | 1.0590e+06 |
| Rg (倒空间) rg_reciprocal | 7.47 Å |
| I(0) (倒空间) i0_reciprocal | 155100000.0000 |
| 解质量估计 total_estimate | 0.6847 |
| 解质量评级 solution_quality | REASONABLE a REASONABLE solution |
| P(r) 峰数 n_peaks | 1 |
| 主峰位置 r_peak_primary | 8.9 Å |
| 偏度 Skewness skewness | 0.308 |
| 峰度 Kurtosis kurtosis | -0.334 |
| 角度范围 angular_range | — – 0.5000 Å−1 |
| 当前正则化参数 α current_alpha | 6.9480 |
| 最高正则化参数 α highest_alpha | 5443.0000 |
| 实空间数据点数 n_real_points | 80 |
| GNOM 版本 gnom_version | 4.1.3 |
| 质量判据 quality_criteria | AN1: 0.000; Oscil: 0.978; Stabil: 0.949; Sysdev: 0.000; Positv: 1.000; Valcen: 0.995; Smooth: 0.131 |
4. 晶体学与实验 4. Crystallography & Experiment
5. 实体与聚合体信息 (1)
6. 折叠分类 (SCOP + CATH) 1 domains
SCOP 2.08 (1 domains)
| 结构域编号 domain_id | d2it8a1 |
| 类 Class class | g — Small proteins |
| 折叠类型 Fold fold | g.3 — Knottins (small inhibitors, toxins, lectins) |
| 超家族 Superfamily superfamily | g.3.2 — Plant inhibitors of proteinases and amylases |
| 家族 Family family | g.3.2.1 — Plant inhibitors of proteinases and amylases |