3g6j

C3b in complex with a C3b specific Fab

Method: X-RAY DIFFRACTION

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

Complement C3 beta chain

物种未注明

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	蛋白异源复合物	异源复合物	蛋白 4	Fab light chain × 1 Fab heavy chain × 1 CALCIUM ION × 1	与蛋白数一致
2	蛋白异源复合物	异源复合物	蛋白 4	Fab light chain × 1 Fab heavy chain × 1 CALCIUM ION × 1	与蛋白数一致
5	蛋白同源多聚体	同源多聚体	蛋白 2	CALCIUM ION × 1	与蛋白数一致
6	蛋白同源多聚体	同源多聚体	蛋白 2	CALCIUM ION × 1	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	CO3_HUMAN
Isoform	—
PDB实体	1, 2
链与序列区间	作者链 A； PDB构建体 1–644； UniProt 23–666 作者链 C； PDB构建体 1–644； UniProt 23–666 作者链 B； PDB构建体 1–915； UniProt 749–1663 作者链 D； PDB构建体 1–915； UniProt 749–1663

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	3g6j
沉积日期 deposition_date	2009-02-06
结构标题 title	C3b in complex with a C3b specific Fab
关键词 keywords	;Complement, C3b, Fab, Antibody:Antigen, Age-related macular degeneration, Cleavage on pair of basic residues, Complement alternate pathway, Complement pathway, Disease mutation, Glycoprotein, Immune response, Inflammatory response, Innate immunity, Phosphoprotein, Secreted, Thioester bond, IMMUNE SYSTEM ;; IMMUNE SYSTEM
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。

3g6j__assembly_5__model_1

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

下载该曲线 .dat

3g6j__assembly_5__model_1 | I(q)

100 个绘图点；横轴和纵轴均采用对数尺度。

3g6j__assembly_5__model_1 | P(r) · Pending

P(r) 将按相同 assembly/model 分别计算和展示。

Rg（Guinier）	45.70 Å
Rg（电子密度）	45.48 Å
总 Rg	45.62 Å
原子数	12221
残基数	1545
排除体积	218370 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	`3g6j__assembly_1__model_1`	tetrameric （4）	成功	4.1.3-1-20251215 (887e7ef)	查看下载
2	1	`3g6j__assembly_2__model_1`	tetrameric （4）	成功	4.1.3-1-20251215 (887e7ef)	查看下载
3	1	`3g6j__assembly_3__model_1`	dimeric （2）	成功	4.1.3-1-20251215 (887e7ef)	查看下载
4	1	`3g6j__assembly_4__model_1`	dimeric （2）	成功	4.1.3-1-20251215 (887e7ef)	查看下载
5	1	`3g6j__assembly_5__model_1`	dimeric （2）	成功	4.1.3-1-20251215 (887e7ef)	查看下载
6	1	`3g6j__assembly_6__model_1`	dimeric （2）	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 (5)

实体 1 Entity 1 polymer

描述 description	Complement C3 beta chain
分子量 formula_weight	71322.2 kDa
来源方法 src_method	nat
拷贝数 entity_count	2

聚合物 Polymer

聚合物类型 type	polypeptide(L)
链编号 strand_id	A,C
原子数 atom_count	31008

SPMYSIITPNILRLESEETMVLEAHDAQGDVPVTVTVHDFPGKKLVLSSEKTVLTPATNHMGNVTFTIPANREFKSEKGRNKFVTVQATFGTQVVEKVVLVSLQSGYLFIQTDKTIYTPGSTVLYRIFTVNHKLLPVGRTVMVNIENPEGIPVKQDSLSSQNQLGVLPLSWDIPELVNMGQWKIRAYYENSPQQVFSTEFEVKEYVLPSFEVIVEPTEKFYYIYNEKGLEVTITARFLYGKKVEGTAFVIFGIQDGEQRISLPESLKRIPIEDGSGEVVLSRKVLLDGVQNPRAEDLVGKSLYVSATVILHSGSDMVQAERSGIPIVTSPYQIHFTKTPKYFKPGMPFDLMVFVTNPDGSPAYRVPVAVQGEDTVQSLTQGDGVAKLSINTHPSQKPLSITVRTKKQELSEAEQATRTMQALPYSTVGNSNNYLHLSVLRTELRPGETLNVNFLLRMDRAHEAKIRYYTYLIMNKGRLLKAGRQVREPGQDLVVLPLSITTDFIPSFRLVAYYTLIGASGQREVVADSVWVDVKDSCVGSLVVKSGQSEDRQPVPGQQMTLKIEGDHGARVVLVAVDKGVFVLNKKNKLTQSKIWDVVEKADIGCTPGSGKDYAGVFSDAGLTFTSSSGQQTAQRAELQCPQPA

实体 2 Entity 2 polymer

描述 description	Complement C3 alpha chain
分子量 formula_weight	104073.2 kDa
来源方法 src_method	nat
拷贝数 entity_count	2

聚合物 Polymer

聚合物类型 type	polypeptide(L)
链编号 strand_id	B,D

SNLDEDIIAEENIVSRSEFPESWLWNVEDLKEPPKNGISTKLMNIFLKDSITTWEILAVSMSDKKGICVADPFEVTVMQDFFIDLRLPYSVVRNEQVEIRAVLYNYRQNQELKVRVELLHNPAFCSLATTKRRHQQTVTIPPKSSLSVPYVIVPLKTGLQEVEVKAAVYHHFISDGVRKSLKVVPEGIRMNKTVAVRTLDPERLGREGVQKEDIPPADLSDQVPDTESETRILLQGTPVAQMTEDAVDAERLKHLIVTPSGCGEQNMIGMTPTVIAVHYLDETEQWEKFGLEKRQGALELIKKGYTQQLAFRQPSSAFAAFVKRAPSTWLTAYVVKVFSLAVNLIAIDSQVLCGAVKWLILEKQKPDGVFQEDAPVIHQEMIGGLRNNNEKDMALTAFVLISLQEAKDICEEQVNSLPGSITKAGDFLEANYMNLQRSYTVAIAGYALAQMGRLKGPLLNKFLTTAKDKNRWEDPGKQLYNVEATSYALLALLQLKDFDFVPPVVRWLNEQRYYGGGYGSTQATFMVFQALAQYQKDAPDHQELNLDVSLQLPSRSSKITHRIHWESASLLRSEETKENEGFTVTAEGKGQGTLSVVTMYHAKAKDQLTCNKFDLKVTIKPAPETEKRPQDAKNTMILEICTRYRGDQDATMSILDISMMTGFAPDTDDLKQLANGVDRYISKYELDKAFSDRNTLIIYLDKVSHSEDDCLAFKVHQYFNVELIQPGAVKVYAYYNLEESCTRFYHPEKEDGKLNKLCRDELCRCAEENCFIQKSDDKVTLEERLDKACEPGVDYVYKTRLVKVQLSNDFDEYIMAIEQTIKSGSDEVQVGQQRTFISPIKCREALKLEEKKHYLMWGLSSDFWGEKPNLSYIIGKDTWVEHWPEEDECQDEENQKQCQDLGAFTESMVVFGCPN

实体 3 Entity 3 polymer

描述 description	Fab light chain
分子量 formula_weight	23345.9 kDa
来源方法 src_method	man
拷贝数 entity_count	2

聚合物 Polymer

聚合物类型 type	polypeptide(L)
链编号 strand_id	E,G

DIQMTQSPSSLSASVGDRVTITCRASQDVSTAVAWYQQKPGKAPKLLIYSASFLYSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSYATLPTFEQGTKVEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI 分类编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Escherichia coli

实体 4 Entity 4 polymer

描述 description	Fab heavy chain
分子量 formula_weight	23793.6 kDa
来源方法 src_method	man
拷贝数 entity_count	2

聚合物 Polymer

聚合物类型 type	polypeptide(L)
链编号 strand_id	F,H

EVQLVESGGGLVQPGGSLRLSCAASGFSFTSSSVSWVRQAPGKGLEWVGLIYPYNGFNYYADSVKGRFTISANTSKNTAYLQMNSLRAEDTAVYYCARNALYGSGGYYAMDYWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSC

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI 分类编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Escherichia coli

实体 5 Entity 5 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	2

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6. 折叠分类 (SCOP + CATH) 38 domains

SCOP 2.08 (6 domains)

结构域编号 domain_id	d3g6je1
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.1.1.0 — automated matches

结构域编号 domain_id	d3g6je2
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	d3g6jf_
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.1.1.0 — automated matches

结构域编号 domain_id	d3g6jg1
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.1.1.0 — automated matches

结构域编号 domain_id	d3g6jg2
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	d3g6jh_
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.1.1.0 — automated matches

CATH v4.4 (32 domains)

结构域编号 domain_id	3g6jA01
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	1930 — Macroglobulin (MG2) domain

结构域编号 domain_id	3g6jA02
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	1930 — Macroglobulin (MG2) domain

结构域编号 domain_id	3g6jA03
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	1940 —

结构域编号 domain_id	3g6jA04
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	3g6jA05
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	1930 — Macroglobulin (MG2) domain

结构域编号 domain_id	3g6jA06
类 Class class	6 — Special
架构 Architecture architecture	20 — Other non-globular
拓扑 Topology topology	50 — N-terminal domain of TfIIb
同源超家族 H-superfamily homologous superfamily	160 —

结构域编号 domain_id	3g6jB01
类 Class class	2 — Mainly Beta
架构 Architecture architecture	20 — Single Sheet
拓扑 Topology topology	130 — S-adenosyl-L-methionine-dependent methyltransferases
同源超家族 H-superfamily homologous superfamily	20 —

结构域编号 domain_id	3g6jB02
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	3g6jB03
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	1540 —

结构域编号 domain_id	3g6jB04
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	50 — Alpha/alpha barrel
拓扑 Topology topology	10 — Glycosyltransferase
同源超家族 H-superfamily homologous superfamily	20 —

结构域编号 domain_id	3g6jB05
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	690 — Alpha-macroglobulin, receptor-binding domain

结构域编号 domain_id	3g6jB06
类 Class class	2 — Mainly Beta
架构 Architecture architecture	40 — Beta Barrel
拓扑 Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
同源超家族 H-superfamily homologous superfamily	120 —

结构域编号 domain_id	3g6jC01
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	1930 — Macroglobulin (MG2) domain

结构域编号 domain_id	3g6jC02
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	1930 — Macroglobulin (MG2) domain

结构域编号 domain_id	3g6jC03
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	1940 —

结构域编号 domain_id	3g6jC04
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	3g6jC05
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	1930 — Macroglobulin (MG2) domain

结构域编号 domain_id	3g6jC06
类 Class class	6 — Special
架构 Architecture architecture	20 — Other non-globular
拓扑 Topology topology	50 — N-terminal domain of TfIIb
同源超家族 H-superfamily homologous superfamily	160 —

结构域编号 domain_id	3g6jD01
类 Class class	2 — Mainly Beta
架构 Architecture architecture	20 — Single Sheet
拓扑 Topology topology	130 — S-adenosyl-L-methionine-dependent methyltransferases
同源超家族 H-superfamily homologous superfamily	20 —

结构域编号 domain_id	3g6jD02
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	3g6jD03
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	1540 —

结构域编号 domain_id	3g6jD04
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	50 — Alpha/alpha barrel
拓扑 Topology topology	10 — Glycosyltransferase
同源超家族 H-superfamily homologous superfamily	20 —

结构域编号 domain_id	3g6jD05
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	690 — Alpha-macroglobulin, receptor-binding domain

结构域编号 domain_id	3g6jD06
类 Class class	2 — Mainly Beta
架构 Architecture architecture	40 — Beta Barrel
拓扑 Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
同源超家族 H-superfamily homologous superfamily	120 —

结构域编号 domain_id	3g6jE01
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	3g6jE02
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	3g6jF01
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	3g6jF02
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	3g6jG01
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	3g6jG02
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	3g6jH01
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	3g6jH02
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

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晶胞边长 a length_a	216.436 Å
晶胞边长 b length_b	180.417 Å
晶胞边长 c length_c	154.584 Å
晶胞夹角 α angle_alpha	90.00 °
晶胞夹角 β angle_beta	115.73 °
晶胞夹角 γ angle_gamma	90.00 °
晶胞分子数 Z z_pdb	8

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	3.100 Å
最低分辨率 resolution_low	20.000 Å
R 因子 r_factor	0.2178
R_work r_work	0.2144
R_free r_free	0.2822

C3b in complex with a C3b specific Fab

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

Complement C3 beta chain

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

3g6j__assembly_5__model_1

3g6j__assembly_5__model_1 | I(q)

3g6j__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 (5)

实体 1 Entity 1 polymer

聚合物 Polymer

实体 2 Entity 2 polymer

聚合物 Polymer

实体 3 Entity 3 polymer

聚合物 Polymer

来源 Source

实体 4 Entity 4 polymer

聚合物 Polymer

来源 Source

实体 5 Entity 5 non-polymer

6. 折叠分类 (SCOP + CATH) 38 domains

SCOP 2.08 (6 domains)

CATH v4.4 (32 domains)

7. 引用文献 (1)

C3b in complex with a C3b specific Fab

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

Complement C3 beta chain

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

3g6j__assembly_5__model_1

3g6j__assembly_5__model_1 | I(q)

3g6j__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 (5)

实体 1 Entity 1 polymer

聚合物 Polymer

实体 2 Entity 2 polymer

聚合物 Polymer

实体 3 Entity 3 polymer

聚合物 Polymer

来源 Source

实体 4 Entity 4 polymer

聚合物 Polymer

来源 Source

实体 5 Entity 5 non-polymer

6. 折叠分类 (SCOP + CATH) 38 domains

SCOP 2.08 (6 domains)

CATH v4.4 (32 domains)

7. 引用文献 (1)