2pe5

Crystal Structure of the Lac Repressor bound to ONPG in repressed state

Method: X-RAY DIFFRACTION
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1. 蛋白身份与相关结构 Protein Identity & Related Structures

Lactose operon repressor

Escherichia coli

UniProt P03023

当前结构中的状态

Assembly 物理组成 蛋白状态 分子拷贝数 共同组分 数据核对
1 蛋白–DNA 同源多聚体 蛋白 2 DNA 2 ;DNA (5'-D(*DAP*DAP*DTP*DTP*DGP*DTP*DGP*DAP*DGP*DCP*DGP*DCP*DTP*DCP*DAP*DCP*DAP*DAP*DTP*DT)-3') ; × 2 2-nitrophenyl beta-D-galactopyranoside × 2 与全部聚合物一致
2 蛋白–DNA 同源多聚体 蛋白 2 DNA 2 ;DNA (5'-D(*DAP*DAP*DTP*DTP*DGP*DTP*DGP*DAP*DGP*DCP*DGP*DCP*DTP*DCP*DAP*DCP*DAP*DAP*DTP*DT)-3') ; × 2 2-nitrophenyl beta-D-galactopyranoside × 2 与全部聚合物一致

数据库中的同蛋白其他状态

查看构建体与数据证据
UniProt名称 LACI_ECOLI
Isoform —
PDB实体 2
链与序列区间 作者链 A; PDB构建体 1–330; UniProt 2–331 作者链 B; PDB构建体 1–330; UniProt 2–331 作者链 C; PDB构建体 1–330; UniProt 2–331

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。

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2. 结构基本信息 2. Structure Basics

条目编号 entry_id2pe5
沉积日期 deposition_date2007-04-02
结构标题 titleCrystal Structure of the Lac Repressor bound to ONPG in repressed state
关键词 keywords;Lac repressor, allosteric effectors, gene regulation, DNA-binding, Transcription, Transcription regulation, TRANSCRIPTION-DNA COMPLEX ;; TRANSCRIPTION/DNA
实验方法 methodX-RAY DIFFRACTION
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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。

2pe5__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

下载该曲线 .dat

2pe5__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 个绘图点;横轴和纵轴均采用对数尺度。

2pe5__assembly_1__model_1 | P(r) · Pending

新版 assembly/model P(r) 尚未计算 此处仅保留位置,不展示旧数据 r (Angstrom) P(r)
P(r) 将按相同 assembly/model 分别计算和展示。
Rg(Guinier)31.15 Å
Rg(电子密度)29.84 Å
总 Rg30.52 Å
原子数5689
残基数692
排除体积99233 ų
最大 q0.500 Å⁻¹
Assembly Model 结构单元 聚集说明 状态 CRYSOL 操作
1 1 2pe5__assembly_1__model_1 tetrameric (4) 成功 4.1.3-1-20251215 (887e7ef) 查看 下载
2 1 2pe5__assembly_2__model_1 tetrameric (4) 成功 4.1.3-1-20251215 (887e7ef) 查看 下载
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4. 晶体学与实验 4. Crystallography & Experiment

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5. 实体与聚合物信息 Entities & Polymers (3)

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6. 折叠分类 (SCOP + CATH) 15 domains

SCOP 2.08 (6 domains)

结构域编号 domain_idd2pe5a1
类 Class classa — All alpha proteins
折叠类型 Fold folda.35 — lambda repressor-like DNA-binding domains
超家族 Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
家族 Family familya.35.1.5 — GalR/LacI-like bacterial regulator
结构域编号 domain_idd2pe5a2
类 Class classc — Alpha and beta proteins (a/b)
折叠类型 Fold foldc.93 — Periplasmic binding protein-like I
超家族 Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
家族 Family familyc.93.1.1 — L-arabinose binding protein-like
结构域编号 domain_idd2pe5b1
类 Class classa — All alpha proteins
折叠类型 Fold folda.35 — lambda repressor-like DNA-binding domains
超家族 Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
家族 Family familya.35.1.5 — GalR/LacI-like bacterial regulator
结构域编号 domain_idd2pe5b2
类 Class classc — Alpha and beta proteins (a/b)
折叠类型 Fold foldc.93 — Periplasmic binding protein-like I
超家族 Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
家族 Family familyc.93.1.1 — L-arabinose binding protein-like
结构域编号 domain_idd2pe5c1
类 Class classa — All alpha proteins
折叠类型 Fold folda.35 — lambda repressor-like DNA-binding domains
超家族 Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
家族 Family familya.35.1.5 — GalR/LacI-like bacterial regulator
结构域编号 domain_idd2pe5c2
类 Class classc — Alpha and beta proteins (a/b)
折叠类型 Fold foldc.93 — Periplasmic binding protein-like I
超家族 Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
家族 Family familyc.93.1.1 — L-arabinose binding protein-like

CATH v4.4 (9 domains)

结构域编号 domain_id2pe5A01
类 Class class1 — Mainly Alpha
架构 Architecture architecture10 — Orthogonal Bundle
拓扑 Topology topology260 — 434 Repressor (Amino-terminal Domain)
同源超家族 H-superfamily homologous superfamily40 — lambda repressor-like DNA-binding domains
结构域编号 domain_id2pe5A02
类 Class class3 — Alpha Beta
架构 Architecture architecture40 — 3-Layer(aba) Sandwich
拓扑 Topology topology50 — Rossmann fold
同源超家族 H-superfamily homologous superfamily2300 — Response regulator
结构域编号 domain_id2pe5A03
类 Class class3 — Alpha Beta
架构 Architecture architecture40 — 3-Layer(aba) Sandwich
拓扑 Topology topology50 — Rossmann fold
同源超家族 H-superfamily homologous superfamily2300 — Response regulator
结构域编号 domain_id2pe5B01
类 Class class1 — Mainly Alpha
架构 Architecture architecture10 — Orthogonal Bundle
拓扑 Topology topology260 — 434 Repressor (Amino-terminal Domain)
同源超家族 H-superfamily homologous superfamily40 — lambda repressor-like DNA-binding domains
结构域编号 domain_id2pe5B02
类 Class class3 — Alpha Beta
架构 Architecture architecture40 — 3-Layer(aba) Sandwich
拓扑 Topology topology50 — Rossmann fold
同源超家族 H-superfamily homologous superfamily2300 — Response regulator
结构域编号 domain_id2pe5B03
类 Class class3 — Alpha Beta
架构 Architecture architecture40 — 3-Layer(aba) Sandwich
拓扑 Topology topology50 — Rossmann fold
同源超家族 H-superfamily homologous superfamily2300 — Response regulator
结构域编号 domain_id2pe5C01
类 Class class1 — Mainly Alpha
架构 Architecture architecture10 — Orthogonal Bundle
拓扑 Topology topology260 — 434 Repressor (Amino-terminal Domain)
同源超家族 H-superfamily homologous superfamily40 — lambda repressor-like DNA-binding domains
结构域编号 domain_id2pe5C02
类 Class class3 — Alpha Beta
架构 Architecture architecture40 — 3-Layer(aba) Sandwich
拓扑 Topology topology50 — Rossmann fold
同源超家族 H-superfamily homologous superfamily2300 — Response regulator
结构域编号 domain_id2pe5C03
类 Class class3 — Alpha Beta
架构 Architecture architecture40 — 3-Layer(aba) Sandwich
拓扑 Topology topology50 — Rossmann fold
同源超家族 H-superfamily homologous superfamily2300 — Response regulator
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7. 引用文献 (1)