1n4d
The Ligand-Free Structure of E coli BtuF, the Periplasmic Binding Protein for Vitamin B12
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 | 1n4d |
| 沉积日期 deposition_date | 2002-10-30 |
| 结构标题 title | The Ligand-Free Structure of E coli BtuF, the Periplasmic Binding Protein for Vitamin B12 |
| 关键词 keywords | ABC transporter, Vitamin B12, periplasmic binding protein, transmembrane transport, TRANSPORT PROTEIN; TRANSPORT PROTEIN |
| 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 | 81.93 Å |
| 回转半径 Rg (电子) rg_electron | 82.80 Å |
| 零角强度 I(0) i0 | 36303500.00 |
| 分子量 molecular_weight | 52052.0 kDa |
| 排除体积 excluded_volume | 65482 ų |
| 包络体积 envelope_volume | 157280 ų |
| 水化壳体积 shell_volume | 16064 ų |
| 包络直径 envelope_diameter | 211.7 Å |
| 壳层 Rg shell_rg | 91.84 Å |
| 包络 Rg envelope_rg | 71.69 Å |
| 形状 Rg shape_rg | 82.78 Å |
| 总 Rg total_rg | 82.99 Å |
| 总原子数 total_atoms | 3661 |
| 残基数 n_residues | 467 |
| 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 | 276.5 Å |
| Rg (实空间) rg_real | 82.96 Å |
| Rg 误差 (实空间) rg_real_error | 5.88 Å |
| I(0) (实空间) i0_real | 3.6300e+07 |
| I(0) 误差 (实空间) i0_real_error | 9.3340e+05 |
| Rg (倒空间) rg_reciprocal | 76.19 Å |
| I(0) (倒空间) i0_reciprocal | 35720000.0000 |
| 解质量估计 total_estimate | 0.5389 |
| 解质量评级 solution_quality | REASONABLE a REASONABLE solution |
| P(r) 峰数 n_peaks | 5 |
| 主峰位置 r_peak_primary | 14.6 Å |
| 偏度 Skewness skewness | 0.032 |
| 峰度 Kurtosis kurtosis | -1.880 |
| 角度范围 angular_range | — – 0.0950 Å−1 |
| 当前正则化参数 α current_alpha | 0.0000 |
| 最高正则化参数 α highest_alpha | 1725000.0000 |
| 实空间数据点数 n_real_points | 20 |
| GNOM 版本 gnom_version | 4.1.3 |
| 质量判据 quality_criteria | AN1: 0.000; Oscil: 0.000; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.002; Smooth: 0.000 |
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) 6 domains
SCOP 2.08 (2 domains)
| 结构域编号 domain_id | d1n4da_ |
| 类 Class class | c — Alpha and beta proteins (a/b) |
| 折叠类型 Fold fold | c.92 — Chelatase-like |
| 超家族 Superfamily superfamily | c.92.2 — 'Helical backbone' metal receptor |
| 家族 Family family | c.92.2.2 — TroA-like |
| 结构域编号 domain_id | d1n4db_ |
| 类 Class class | c — Alpha and beta proteins (a/b) |
| 折叠类型 Fold fold | c.92 — Chelatase-like |
| 超家族 Superfamily superfamily | c.92.2 — 'Helical backbone' metal receptor |
| 家族 Family family | c.92.2.2 — TroA-like |
CATH v4.4 (4 domains)
| 结构域编号 domain_id | 1n4dA01 |
| 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 | 1980 — Nitrogenase molybdenum iron protein domain |
| 结构域编号 domain_id | 1n4dA02 |
| 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 | 1980 — Nitrogenase molybdenum iron protein domain |
| 结构域编号 domain_id | 1n4dB01 |
| 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 | 1980 — Nitrogenase molybdenum iron protein domain |
| 结构域编号 domain_id | 1n4dB02 |
| 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 | 1980 — Nitrogenase molybdenum iron protein domain |