1k8d
crystal structure of the non-classical MHC class Ib Qa-2 complexed with a self peptide
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 | 1k8d |
| 沉积日期 deposition_date | 2001-10-23 |
| 结构标题 title | crystal structure of the non-classical MHC class Ib Qa-2 complexed with a self peptide |
| 关键词 keywords | non-classical MHC class I, antigen presentation, preimplantation embryo devolepment gene product, Qa-2, Q9, IMMUNE SYSTEM; IMMUNE SYSTEM |
| 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 | 23.68 Å |
| 回转半径 Rg (电子) rg_electron | 22.74 Å |
| 零角强度 I(0) i0 | 34930000.00 |
| 分子量 molecular_weight | 44360.0 kDa |
| 排除体积 excluded_volume | 54978 ų |
| 包络体积 envelope_volume | 65872 ų |
| 水化壳体积 shell_volume | 24232 ų |
| 包络直径 envelope_diameter | 79.0 Å |
| 壳层 Rg shell_rg | 29.52 Å |
| 包络 Rg envelope_rg | 22.90 Å |
| 形状 Rg shape_rg | 22.72 Å |
| 总 Rg total_rg | 23.61 Å |
| 总原子数 total_atoms | 3126 |
| 残基数 n_residues | 382 |
| 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 | 76.4 Å |
| Rg (实空间) rg_real | 23.62 Å |
| Rg 误差 (实空间) rg_real_error | 0.42 Å |
| I(0) (实空间) i0_real | 3.4930e+07 |
| I(0) 误差 (实空间) i0_real_error | 4.5770e+05 |
| Rg (倒空间) rg_reciprocal | 23.63 Å |
| I(0) (倒空间) i0_reciprocal | 34930000.0000 |
| 解质量估计 total_estimate | 0.9021 |
| 解质量评级 solution_quality | EXCELLENT a EXCELLENT solution |
| P(r) 峰数 n_peaks | 1 |
| 主峰位置 r_peak_primary | 28.6 Å |
| 偏度 Skewness skewness | 0.246 |
| 峰度 Kurtosis kurtosis | -0.456 |
| 角度范围 angular_range | — – 0.3350 Å−1 |
| 当前正则化参数 α current_alpha | 0.0000 |
| 最高正则化参数 α highest_alpha | 7678000.0000 |
| 实空间数据点数 n_real_points | 65 |
| GNOM 版本 gnom_version | 4.1.3 |
| 质量判据 quality_criteria | AN1: 0.000; Oscil: 0.913; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.996; Smooth: 0.987 |
4. 晶体学与实验 4. Crystallography & Experiment
5. 实体与聚合体信息 (4)
6. 折叠分类 (SCOP + CATH) 6 domains
SCOP 2.08 (3 domains)
| 结构域编号 domain_id | d1k8da1 |
| 类 Class class | b — All beta proteins |
| 折叠类型 Fold fold | b.1 — Immunoglobulin-like beta-sandwich |
| 超家族 Superfamily superfamily | b.1.1 — Immunoglobulin |
| 家族 Family family | b.1.1.2 — C1 set domains (antibody constant domain-like) |
| 结构域编号 domain_id | d1k8da2 |
| 类 Class class | d — Alpha and beta proteins (a+b) |
| 折叠类型 Fold fold | d.19 — MHC antigen-recognition domain |
| 超家族 Superfamily superfamily | d.19.1 — MHC antigen-recognition domain |
| 家族 Family family | d.19.1.1 — MHC antigen-recognition domain |
| 结构域编号 domain_id | d1k8db_ |
| 类 Class class | b — All beta proteins |
| 折叠类型 Fold fold | b.1 — Immunoglobulin-like beta-sandwich |
| 超家族 Superfamily superfamily | b.1.1 — Immunoglobulin |
| 家族 Family family | b.1.1.2 — C1 set domains (antibody constant domain-like) |
CATH v4.4 (3 domains)
| 结构域编号 domain_id | 1k8dA01 |
| 类 Class class | 3 — Alpha Beta |
| 架构 Architecture architecture | 30 — 2-Layer Sandwich |
| 拓扑 Topology topology | 500 — Murine Class I Major Histocompatibility Complex, H2-DB; Chain A, domain 1 |
| 同源超家族 H-superfamily homologous superfamily | 10 — MHC class I-like antigen recognition-like |
| 结构域编号 domain_id | 1k8dA02 |
| 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 | 10 — Immunoglobulins |
| 结构域编号 domain_id | 1k8dB00 |
| 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 | 10 — Immunoglobulins |