SAXSdb — 6p3c

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Fumarate hydratase class II

Escherichia coli (strain K12)

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	CITRATE ANION × 4 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	FUMC_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–467； UniProt 1–467 Author chain B； PDBConstruct 1–467； UniProt 1–467

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	6p3c
Deposition date deposition_date	2019-05-23
Structure title title	E. coli fumarase mutant - T187A
Keywords keywords	fumarase, metabolism, Krebs Cycle, LYASE; LYASE
Experimental Method method	X-RAY DIFFRACTION

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

6p3c__assembly_1__model_1

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

Download this curve (.dat)

6p3c__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6p3c__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	36.49 Å
Rg (electron density)	35.72 Å
Total Rg	36.10 Å
Atom count	13972
Residues	1840
Excluded volume	248160 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6p3c__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Description description	Fumarate hydratase class II
Molecular weight formula_weight	51306.6 kDa
EC 编号 ec_number	4.2.1.2
Mutation mutation	T187A
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	8002

MNTVRSEKDSMGAIDVPADKLWGAQTQRSLEHFRISTEKMPTSLIHALALTKRAAAKVNEDLGLLSEEKASAIRQAADEVLAGQHDDEFPLAIWQTGSGTQSNMNMNEVLANRASELLGGVRGMERKVHPNDDVNKSQSSNDVFPTAMHVAALLALRKQLIPQLKTLTQTLNEKSRAFADIVKIGRAHLQDATPLTLGQEISGWVAMLEHNLKHIEYSLPHVAELALGGTAVGTGLNTHPEYARRVADELAVITCAPFVTAPNKFEALATCDALVQAHGALKGLAASLMKIANDVRWLASGPRCGIGEISIPENEPGSSIMPGKVNPTQCEALTMLCCQVMGNDVAINMGGASGNFELNVFRPMVIHNFLQSVRLLADGMESFNKHCAVGIEPNRERINQLLNESLMLVTALNTHIGYDKAAEIAKKAHKEGLTLKAAALALGYLSEAEFDSWVRPEQMVGSMKAGRPHHHHH

Source Source

Source organism organism	Escherichia coli (strain K12)
NCBI taxonomy ID ncbi_taxonomy_id	83333
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	CITRATE ANION
Molecular weight formula_weight	189.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	862

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d6p3ca_
Class class	a — All alpha proteins
Fold Fold fold	a.127 — L-aspartase-like
Superfamily Superfamily superfamily	a.127.1 — L-aspartase-like
Family Family family	a.127.1.0 — automated matches

Domain ID domain_id	d6p3cb_
Class class	a — All alpha proteins
Fold Fold fold	a.127 — L-aspartase-like
Superfamily Superfamily superfamily	a.127.1 — L-aspartase-like
Family Family family	a.127.1.0 — automated matches

CATH v4.4 (4 domains)

Domain ID domain_id	6p3cA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	275 — Fumarase C; Chain B, domain 1
Homologous superfamily homologous superfamily	10 — Fumarase/aspartase (N-terminal domain)

Domain ID domain_id	6p3cA02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	200 — Fumarase C; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — Fumarase/aspartase (Central domain)

Domain ID domain_id	6p3cB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	275 — Fumarase C; Chain B, domain 1
Homologous superfamily homologous superfamily	10 — Fumarase/aspartase (N-terminal domain)

Domain ID domain_id	6p3cB02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	200 — Fumarase C; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — Fumarase/aspartase (Central domain)

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Unit-cell length a length_a	104.065 Å
Unit-cell length b length_b	218.448 Å
Unit-cell length c length_c	86.649 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	16

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	1.459 Å
Low-resolution limit resolution_low	29.501 Å
R factor r_factor	0.1634
R_work r_work	0.1624
R_free r_free	0.1821

E. coli fumarase mutant - T187A

1. Protein Identity and Related Structures Protein Identity & Related Structures

Fumarate hydratase class II

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

6p3c__assembly_1__model_1

6p3c__assembly_1__model_1 | I(q)

6p3c__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)

E. coli fumarase mutant - T187A

1. Protein Identity and Related Structures Protein Identity & Related Structures

Fumarate hydratase class II

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

6p3c__assembly_1__model_1

6p3c__assembly_1__model_1 | I(q)

6p3c__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)