1tg7
Native structure of beta-galactosidase from Penicillium sp.
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 | 其他组合 | 单体 | 1 / 0 / 0 / 5 | 与蛋白数一致 |
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 | 1tg7 |
| 沉积日期 deposition_date | 2004-05-28 |
| 结构标题 title | Native structure of beta-galactosidase from Penicillium sp. |
| 关键词 keywords | TIM barrel domain, glycoside hydrolase, family GH35, glycoprotein, Penicillium, HYDROLASE; HYDROLASE |
| 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。
1tg7__assembly_1__model_1
Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)
1tg7__assembly_1__model_1 | I(q)
1tg7__assembly_1__model_1 | P(r) · Pending
| Rg（Guinier） | 30.96 Å |
| Rg（电子密度） | 30.24 Å |
| 总 Rg | 31.01 Å |
| 原子数 | 7887 |
| 残基数 | 971 |
| 排除体积 | 139290 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 (11)
6. 折叠分类 (SCOP + CATH) 10 domains
SCOP 2.08 (5 domains)
| 结构域编号 domain_id | d1tg7a1 |
| 类 Class class | b — All beta proteins |
| 折叠类型 Fold fold | b.149 — Beta-galactosidase LacA, domain 3 |
| 超家族 Superfamily superfamily | b.149.1 — Beta-galactosidase LacA, domain 3 |
| 家族 Family family | b.149.1.1 — Beta-galactosidase LacA, domain 3 |
| 结构域编号 domain_id | d1tg7a2 |
| 类 Class class | b — All beta proteins |
| 折叠类型 Fold fold | b.18 — Galactose-binding domain-like |
| 超家族 Superfamily superfamily | b.18.1 — Galactose-binding domain-like |
| 家族 Family family | b.18.1.27 — Beta-galactosidase LacA, domains 4 and 5 |
| 结构域编号 domain_id | d1tg7a3 |
| 类 Class class | b — All beta proteins |
| 折叠类型 Fold fold | b.18 — Galactose-binding domain-like |
| 超家族 Superfamily superfamily | b.18.1 — Galactose-binding domain-like |
| 家族 Family family | b.18.1.27 — Beta-galactosidase LacA, domains 4 and 5 |
| 结构域编号 domain_id | d1tg7a4 |
| 类 Class class | b — All beta proteins |
| 折叠类型 Fold fold | b.71 — Glycosyl hydrolase domain |
| 超家族 Superfamily superfamily | b.71.1 — Glycosyl hydrolase domain |
| 家族 Family family | b.71.1.5 — Beta-galactosidase LacA, domain 2 |
| 结构域编号 domain_id | d1tg7a5 |
| 类 Class class | c — Alpha and beta proteins (a/b) |
| 折叠类型 Fold fold | c.1 — TIM beta/alpha-barrel |
| 超家族 Superfamily superfamily | c.1.8 — (Trans)glycosidases |
| 家族 Family family | c.1.8.14 — Glycosyl hydrolases family 35 catalytic domain |
CATH v4.4 (5 domains)
| 结构域编号 domain_id | 1tg7A01 |
| 类 Class class | 3 — Alpha Beta |
| 架构 Architecture architecture | 20 — Alpha-Beta Barrel |
| 拓扑 Topology topology | 20 — TIM Barrel |
| 同源超家族 H-superfamily homologous superfamily | 80 — Glycosidases |
| 结构域编号 domain_id | 1tg7A02 |
| 类 Class class | 2 — Mainly Beta |
| 架构 Architecture architecture | 102 — 3-layer Sandwich |
| 拓扑 Topology topology | 20 — beta-galactosidase, domain 2 |
| 同源超家族 H-superfamily homologous superfamily | 10 — Beta-galactosidase, domain 2 |
| 结构域编号 domain_id | 1tg7A03 |
| 类 Class class | 2 — Mainly Beta |
| 架构 Architecture architecture | 60 — Sandwich |
| 拓扑 Topology topology | 390 — beta-galactosidase, domain 3 |
| 同源超家族 H-superfamily homologous superfamily | 10 — Beta-galactosidase, domain 3 |
| 结构域编号 domain_id | 1tg7A04 |
| 类 Class class | 2 — Mainly Beta |
| 架构 Architecture architecture | 60 — Sandwich |
| 拓扑 Topology topology | 120 — Jelly Rolls |
| 同源超家族 H-superfamily homologous superfamily | 260 — Galactose-binding domain-like |
| 结构域编号 domain_id | 1tg7A05 |
| 类 Class class | 2 — Mainly Beta |
| 架构 Architecture architecture | 60 — Sandwich |
| 拓扑 Topology topology | 120 — Jelly Rolls |
| 同源超家族 H-superfamily homologous superfamily | 260 — Galactose-binding domain-like |