1mdy
CRYSTAL STRUCTURE OF MYOD BHLH DOMAIN BOUND TO DNA: PERSPECTIVES ON DNA RECOGNITION AND IMPLICATIONS FOR TRANSCRIPTIONAL ACTIVATION
1. 蛋白身份与相关结构 Protein Identity & Related Structures
当前条目没有可用的 UniProt 蛋白身份。
七张关系表仍保留该条目的 assembly 与组成信息，但缺少统一蛋白身份时，不能可靠建立跨 PDB 的同蛋白链接。
当前条目的 assembly 组成
| Assembly | 物理组成 | 蛋白状态 | 蛋白 / DNA / RNA / 其他聚合物 | 数据核对 |
|---|---|---|---|---|
| 1 | 蛋白–DNA | 异源复合物 | 2 / 2 / 0 / 0 | 与全部聚合物一致 |
| 2 | 蛋白–DNA | 同源多聚体 | 2 / 2 / 0 / 0 | 与全部聚合物一致 |
页面优先展示蛋白身份、当前 assembly、共同组分、聚集状态和跨 PDB 结构链接。 链映射与序列区间收在“数据证据”中；数据库内部编号、导入时间和 assembly 操作表达式仅用于维护，因此不在读者页面展示。
2. 结构基本信息 2. Structure Basics
| 条目编号 entry_id | 1mdy |
| 沉积日期 deposition_date | 1994-06-09 |
| 结构标题 title | CRYSTAL STRUCTURE OF MYOD BHLH DOMAIN BOUND TO DNA: PERSPECTIVES ON DNA RECOGNITION AND IMPLICATIONS FOR TRANSCRIPTIONAL ACTIVATION |
| 关键词 keywords | PROTEIN-DNA COMPLEX, TRANSCRIPTION-DNA COMPLEX; TRANSCRIPTION/DNA |
| 实验方法 method | X-RAY DIFFRACTION |
3. Official assembly/model 理论 SAXS Official SAXS Profiles
页面只读取最新 assembly 计算结果。每一条曲线都对应明确的 PDB、official biological assembly 和 coordinate model。
1mdy__assembly_2__model_1
Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)
1mdy__assembly_2__model_1 | I(q)
1mdy__assembly_2__model_1 | P(r) · Pending
| Rg（Guinier） | 19.20 Å |
| Rg（电子密度） | 18.68 Å |
| 总 Rg | 19.42 Å |
| 原子数 | 1584 |
| 残基数 | 152 |
| 排除体积 | 26249 ų |
| 最大 q | 0.500 Å⁻¹ |
4. 晶体学与实验 4. Crystallography & Experiment
5. 实体与聚合物信息 Entities & Polymers (4)
6. 折叠分类 (SCOP + CATH) 8 domains
SCOP 2.08 (4 domains)
| 结构域编号 domain_id | d1mdya_ |
| 类 Class class | a — All alpha proteins |
| 折叠类型 Fold fold | a.38 — HLH-like |
| 超家族 Superfamily superfamily | a.38.1 — HLH, helix-loop-helix DNA-binding domain |
| 家族 Family family | a.38.1.1 — HLH, helix-loop-helix DNA-binding domain |
| 结构域编号 domain_id | d1mdyb_ |
| 类 Class class | a — All alpha proteins |
| 折叠类型 Fold fold | a.38 — HLH-like |
| 超家族 Superfamily superfamily | a.38.1 — HLH, helix-loop-helix DNA-binding domain |
| 家族 Family family | a.38.1.1 — HLH, helix-loop-helix DNA-binding domain |
| 结构域编号 domain_id | d1mdyc_ |
| 类 Class class | a — All alpha proteins |
| 折叠类型 Fold fold | a.38 — HLH-like |
| 超家族 Superfamily superfamily | a.38.1 — HLH, helix-loop-helix DNA-binding domain |
| 家族 Family family | a.38.1.1 — HLH, helix-loop-helix DNA-binding domain |
| 结构域编号 domain_id | d1mdyd_ |
| 类 Class class | a — All alpha proteins |
| 折叠类型 Fold fold | a.38 — HLH-like |
| 超家族 Superfamily superfamily | a.38.1 — HLH, helix-loop-helix DNA-binding domain |
| 家族 Family family | a.38.1.1 — HLH, helix-loop-helix DNA-binding domain |
CATH v4.4 (4 domains)
| 结构域编号 domain_id | 1mdyA00 |
| 类 Class class | 4 — Few Secondary Structures |
| 架构 Architecture architecture | 10 — Irregular |
| 拓扑 Topology topology | 280 — MYOD Basic-Helix-Loop-Helix Domain, subunit B |
| 同源超家族 H-superfamily homologous superfamily | 10 — Helix-loop-helix DNA-binding domain |
| 结构域编号 domain_id | 1mdyB00 |
| 类 Class class | 4 — Few Secondary Structures |
| 架构 Architecture architecture | 10 — Irregular |
| 拓扑 Topology topology | 280 — MYOD Basic-Helix-Loop-Helix Domain, subunit B |
| 同源超家族 H-superfamily homologous superfamily | 10 — Helix-loop-helix DNA-binding domain |
| 结构域编号 domain_id | 1mdyC00 |
| 类 Class class | 4 — Few Secondary Structures |
| 架构 Architecture architecture | 10 — Irregular |
| 拓扑 Topology topology | 280 — MYOD Basic-Helix-Loop-Helix Domain, subunit B |
| 同源超家族 H-superfamily homologous superfamily | 10 — Helix-loop-helix DNA-binding domain |
| 结构域编号 domain_id | 1mdyD00 |
| 类 Class class | 4 — Few Secondary Structures |
| 架构 Architecture architecture | 10 — Irregular |
| 拓扑 Topology topology | 280 — MYOD Basic-Helix-Loop-Helix Domain, subunit B |
| 同源超家族 H-superfamily homologous superfamily | 10 — Helix-loop-helix DNA-binding domain |