1xcb

X-ray Structure of a Rex-Family Repressor/NADH Complex from Thermus Aquaticus

Method: X-RAY DIFFRACTION

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1. 蛋白身份与相关结构 Protein Identity & Related Structures

Redox-sensing transcriptional repressor rex

Thermus aquaticus

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	蛋白同源多聚体	同源多聚体	蛋白 2	CALCIUM ION × 2 NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2	与蛋白数一致
2	蛋白同源多聚体	同源多聚体	蛋白 2	CALCIUM ION × 3 NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2	与蛋白数一致
3	蛋白同源多聚体	同源多聚体	蛋白 2	NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2	与蛋白数一致
4	蛋白同源多聚体	同源多聚体	蛋白 2	NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2	与蛋白数一致
5	蛋白同源多聚体	同源多聚体	蛋白 14	CALCIUM ION × 10 NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 14	与蛋白数一致

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	REX_THEAQ
Isoform	—
PDB实体	1
链与序列区间	作者链 A； PDB构建体 1–211； UniProt 1–211 作者链 B； PDB构建体 1–211； UniProt 1–211 作者链 C； PDB构建体 1–211； UniProt 1–211 作者链 D； PDB构建体 1–211； UniProt 1–211 作者链 E； PDB构建体 1–211； UniProt 1–211 作者链 F； PDB构建体 1–211； UniProt 1–211 作者链 G； PDB构建体 1–211； UniProt 1–211

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_id	1xcb
沉积日期 deposition_date	2004-09-01
结构标题 title	X-ray Structure of a Rex-Family Repressor/NADH Complex from Thermus Aquaticus
关键词 keywords	;redox-sensing, winged helix, rossmann fold, Nicotinamide Adenine Dinucleotide, NAD, Rex, Thermus aquaticus, New York SGX Research Center for Structural Genomics, NYSGXRC, Structural Genomics, PSI, Protein Structure Initiative, DNA BINDING PROTEIN ;; DNA BINDING PROTEIN
实验方法 method	X-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。

1xcb__assembly_5__model_1

Assembly 5 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

下载该曲线 .dat

1xcb__assembly_5__model_1 | I(q)

100 个绘图点；横轴和纵轴均采用对数尺度。

1xcb__assembly_5__model_1 | P(r) · Pending

P(r) 将按相同 assembly/model 分别计算和展示。

Rg（Guinier）	99.43 Å
Rg（电子密度）	104.00 Å
总 Rg	103.30 Å
原子数	22280
残基数	2778
排除体积	400300 Å³
最大 q	0.500 Å⁻¹

Assembly	Model	结构单元	聚集说明	状态	CRYSOL	操作
1	1	`1xcb__assembly_1__model_1`	dimeric （2）	成功	4.1.3-1-20251215 (887e7ef)	查看下载
2	1	`1xcb__assembly_2__model_1`	dimeric （2）	成功	4.1.3-1-20251215 (887e7ef)	查看下载
3	1	`1xcb__assembly_3__model_1`	dimeric （2）	成功	4.1.3-1-20251215 (887e7ef)	查看下载
4	1	`1xcb__assembly_4__model_1`	dimeric （2）	成功	4.1.3-1-20251215 (887e7ef)	查看下载
5	1	`1xcb__assembly_5__model_1`	tetradecameric （14）	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)

实体 1 Entity 1 polymer

描述 description	Redox-sensing transcriptional repressor rex
分子量 formula_weight	23438.6 kDa
来源方法 src_method	man
拷贝数 entity_count	7

聚合物 Polymer

聚合物类型 type	polypeptide(L)
链编号 strand_id	A,B,C,D,E,F,G
原子数 atom_count	11159

MKVPEAAISRLITYLRILEELEAQGVHRTSSEQLGELAQVTAFQVRKDLSYFGSYGTRGVGYTVPVLKRELRHILGLNRKWGLCIVGMGRLGSALADYPGFGESFELRGFFDVDPEKVGRPVRGGVIEHVDLLPQRVPGRIEIALLTVPREAAQKAADLLVAAGIKGILNFAPVVLEVPKEVAVENVDFLAGLTRLSFAILNPKWREEMMG

来源 Source

来源生物 organism	Thermus aquaticus
NCBI 分类编号 ncbi_taxonomy_id	271
宿主生物 host_organism	Escherichia coli

实体 2 Entity 2 non-polymer

描述 description	CALCIUM ION
分子量 formula_weight	40.1 kDa
来源方法 src_method	syn
拷贝数 entity_count	5

实体 3 Entity 3 non-polymer

描述 description	NICOTINAMIDE-ADENINE-DINUCLEOTIDE
分子量 formula_weight	663.4 kDa
来源方法 src_method	syn
拷贝数 entity_count	7

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6. 折叠分类 (SCOP + CATH) 28 domains

SCOP 2.08 (14 domains)

结构域编号 domain_id	d1xcba1
类 Class class	a — All alpha proteins
折叠类型 Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
超家族 Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
家族 Family family	a.4.5.38 — Transcriptional repressor Rex, N-terminal domain

结构域编号 domain_id	d1xcba2
类 Class class	c — Alpha and beta proteins (a/b)
折叠类型 Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
超家族 Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
家族 Family family	c.2.1.12 — Transcriptional repressor Rex, C-terminal domain

结构域编号 domain_id	d1xcbb1
类 Class class	a — All alpha proteins
折叠类型 Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
超家族 Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
家族 Family family	a.4.5.38 — Transcriptional repressor Rex, N-terminal domain

结构域编号 domain_id	d1xcbb2
类 Class class	c — Alpha and beta proteins (a/b)
折叠类型 Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
超家族 Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
家族 Family family	c.2.1.12 — Transcriptional repressor Rex, C-terminal domain

结构域编号 domain_id	d1xcbc1
类 Class class	a — All alpha proteins
折叠类型 Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
超家族 Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
家族 Family family	a.4.5.38 — Transcriptional repressor Rex, N-terminal domain

结构域编号 domain_id	d1xcbc2
类 Class class	c — Alpha and beta proteins (a/b)
折叠类型 Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
超家族 Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
家族 Family family	c.2.1.12 — Transcriptional repressor Rex, C-terminal domain

结构域编号 domain_id	d1xcbd1
类 Class class	a — All alpha proteins
折叠类型 Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
超家族 Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
家族 Family family	a.4.5.38 — Transcriptional repressor Rex, N-terminal domain

结构域编号 domain_id	d1xcbd2
类 Class class	c — Alpha and beta proteins (a/b)
折叠类型 Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
超家族 Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
家族 Family family	c.2.1.12 — Transcriptional repressor Rex, C-terminal domain

结构域编号 domain_id	d1xcbe1
类 Class class	a — All alpha proteins
折叠类型 Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
超家族 Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
家族 Family family	a.4.5.38 — Transcriptional repressor Rex, N-terminal domain

结构域编号 domain_id	d1xcbe2
类 Class class	c — Alpha and beta proteins (a/b)
折叠类型 Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
超家族 Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
家族 Family family	c.2.1.12 — Transcriptional repressor Rex, C-terminal domain

结构域编号 domain_id	d1xcbf1
类 Class class	a — All alpha proteins
折叠类型 Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
超家族 Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
家族 Family family	a.4.5.38 — Transcriptional repressor Rex, N-terminal domain

结构域编号 domain_id	d1xcbf2
类 Class class	c — Alpha and beta proteins (a/b)
折叠类型 Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
超家族 Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
家族 Family family	c.2.1.12 — Transcriptional repressor Rex, C-terminal domain

结构域编号 domain_id	d1xcbg1
类 Class class	a — All alpha proteins
折叠类型 Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
超家族 Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
家族 Family family	a.4.5.38 — Transcriptional repressor Rex, N-terminal domain

结构域编号 domain_id	d1xcbg2
类 Class class	c — Alpha and beta proteins (a/b)
折叠类型 Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
超家族 Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
家族 Family family	c.2.1.12 — Transcriptional repressor Rex, C-terminal domain

CATH v4.4 (14 domains)

结构域编号 domain_id	1xcbA01
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	10 — Orthogonal Bundle
拓扑 Topology topology	10 — Arc Repressor Mutant, subunit A
同源超家族 H-superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

结构域编号 domain_id	1xcbA02
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	720 — NAD(P)-binding Rossmann-like Domain

结构域编号 domain_id	1xcbB01
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	10 — Orthogonal Bundle
拓扑 Topology topology	10 — Arc Repressor Mutant, subunit A
同源超家族 H-superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

结构域编号 domain_id	1xcbB02
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	720 — NAD(P)-binding Rossmann-like Domain

结构域编号 domain_id	1xcbC01
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	10 — Orthogonal Bundle
拓扑 Topology topology	10 — Arc Repressor Mutant, subunit A
同源超家族 H-superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

结构域编号 domain_id	1xcbC02
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	720 — NAD(P)-binding Rossmann-like Domain

结构域编号 domain_id	1xcbD01
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	10 — Orthogonal Bundle
拓扑 Topology topology	10 — Arc Repressor Mutant, subunit A
同源超家族 H-superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

结构域编号 domain_id	1xcbD02
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	720 — NAD(P)-binding Rossmann-like Domain

结构域编号 domain_id	1xcbE01
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	10 — Orthogonal Bundle
拓扑 Topology topology	10 — Arc Repressor Mutant, subunit A
同源超家族 H-superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

结构域编号 domain_id	1xcbE02
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	720 — NAD(P)-binding Rossmann-like Domain

结构域编号 domain_id	1xcbF01
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	10 — Orthogonal Bundle
拓扑 Topology topology	10 — Arc Repressor Mutant, subunit A
同源超家族 H-superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

结构域编号 domain_id	1xcbF02
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	720 — NAD(P)-binding Rossmann-like Domain

结构域编号 domain_id	1xcbG01
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	10 — Orthogonal Bundle
拓扑 Topology topology	10 — Arc Repressor Mutant, subunit A
同源超家族 H-superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

结构域编号 domain_id	1xcbG02
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	720 — NAD(P)-binding Rossmann-like Domain

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晶胞边长 a length_a	189.240 Å
晶胞边长 b length_b	88.970 Å
晶胞边长 c length_c	112.910 Å
晶胞夹角 α angle_alpha	90.00 °
晶胞夹角 β angle_beta	106.09 °
晶胞夹角 γ angle_gamma	90.00 °
晶胞分子数 Z z_pdb	28

空间群 space_group	C 1 2 1
空间群编号 int_tables_number	5
晶系 crystal_system	—

分辨率 resolution	2.900 Å
最低分辨率 resolution_low	20.000 Å
R 因子 r_factor	0.2320
R_work r_work	0.2280
R_free r_free	0.2760

X-ray Structure of a Rex-Family Repressor/NADH Complex from Thermus Aquaticus

1. 蛋白身份与相关结构 Protein Identity & Related Structures

Redox-sensing transcriptional repressor rex

当前结构中的状态

数据库中的同蛋白其他状态

2. 结构基本信息 2. Structure Basics

3. Official assembly/model 理论 SAXS Official SAXS Profiles

1xcb__assembly_5__model_1

1xcb__assembly_5__model_1 | I(q)

1xcb__assembly_5__model_1 | P(r) · Pending

4. 晶体学与实验 4. Crystallography & Experiment

晶胞参数 Unit Cell

对称性 Symmetry

精修参数 Refinement

衍射实验 Diffraction

5. 实体与聚合物信息 Entities & Polymers (3)

实体 1 Entity 1 polymer

聚合物 Polymer

来源 Source

实体 2 Entity 2 non-polymer

实体 3 Entity 3 non-polymer

6. 折叠分类 (SCOP + CATH) 28 domains

SCOP 2.08 (14 domains)

CATH v4.4 (14 domains)

7. 引用文献 (1)

X-ray Structure of a Rex-Family Repressor/NADH Complex from Thermus Aquaticus

1. 蛋白身份与相关结构 Protein Identity & Related Structures

Redox-sensing transcriptional repressor rex

当前结构中的状态

数据库中的同蛋白其他状态

单体

同源二聚体

同源四聚体

其他同源多聚体

异源或核酸复合物

2. 结构基本信息 2. Structure Basics

3. Official assembly/model 理论 SAXS Official SAXS Profiles

1xcb__assembly_5__model_1

1xcb__assembly_5__model_1 | I(q)

1xcb__assembly_5__model_1 | P(r) · Pending

4. 晶体学与实验 4. Crystallography & Experiment

晶胞参数 Unit Cell

对称性 Symmetry

精修参数 Refinement

衍射实验 Diffraction

5. 实体与聚合物信息 Entities & Polymers (3)

实体 1 Entity 1 polymer

聚合物 Polymer

来源 Source

实体 2 Entity 2 non-polymer

实体 3 Entity 3 non-polymer

6. 折叠分类 (SCOP + CATH) 28 domains

SCOP 2.08 (14 domains)

CATH v4.4 (14 domains)

7. 引用文献 (1)