SAXSdb — 3a6m

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

Protein grpE

Thermus thermophilus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	GRPE_THET8
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–177； UniProt 1–177 Author chain B； PDBConstruct 1–177； UniProt 1–177

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	3a6m
Deposition date deposition_date	2009-09-03
Structure title title	Crystal structure of GrpE from Thermus thermophilus HB8
Keywords keywords	GRPE, COILED-COIL, FOUR-HELIX BUNDLE, DIMER, Chaperone, Stress response; CHAPERONE
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.

3a6m__assembly_1__model_1

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

Download this curve (.dat)

3a6m__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3a6m__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	34.56 Å
Rg (electron density)	35.93 Å
Total Rg	35.55 Å
Atom count	2449
Residues	332
Excluded volume	43299 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3a6m__assembly_1__model_1`	dimeric （2）	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 (2)

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	3a6mA01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	20 — Hemagglutinin Ectodomain; Chain B
Homologous superfamily homologous superfamily	20 — GrpE nucleotide exchange factor, coiled-coil domain

Domain ID domain_id	3a6mA02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	22 — Nucleotide Exchange Factor Grpe; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — Head domain of nucleotide exchange factor GrpE

Domain ID domain_id	3a6mB01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	20 — Hemagglutinin Ectodomain; Chain B
Homologous superfamily homologous superfamily	20 — GrpE nucleotide exchange factor, coiled-coil domain

Domain ID domain_id	3a6mB02
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	22 — Nucleotide Exchange Factor Grpe; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — Head domain of nucleotide exchange factor GrpE

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Unit-cell length a length_a	210.382 Å
Unit-cell length b length_b	210.382 Å
Unit-cell length c length_c	210.382 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	48

Space group space_group	P 43 3 2
Space-group number int_tables_number	212
Crystal system crystal_system	—

Resolution resolution	3.230 Å
Low-resolution limit resolution_low	36.620 Å
R factor r_factor	0.2180
R_work r_work	0.2180
R_free r_free	0.2380

Description description	Protein grpE
Molecular weight formula_weight	20058.7 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	2467

Crystal structure of GrpE from Thermus thermophilus HB8

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

Protein grpE

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

3a6m__assembly_1__model_1

3a6m__assembly_1__model_1 | I(q)

3a6m__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

Source organism organism	Thermus thermophilus
NCBI taxonomy ID ncbi_taxonomy_id	300852
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	18

Crystal structure of GrpE from Thermus thermophilus HB8

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

Protein grpE

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

3a6m__assembly_1__model_1

3a6m__assembly_1__model_1 | I(q)

3a6m__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)