1ss8

GroEL

Method: X-RAY DIFFRACTION

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

groEL protein

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 14	water × 14	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 7	water × 7	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CH60_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–524； UniProt 1–524 Author chain B； PDBConstruct 1–524； UniProt 1–524 Author chain C； PDBConstruct 1–524； UniProt 1–524 Author chain D； PDBConstruct 1–524； UniProt 1–524 Author chain E； PDBConstruct 1–524； UniProt 1–524 Author chain F； PDBConstruct 1–524； UniProt 1–524 Author chain G； PDBConstruct 1–524； UniProt 1–524

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	1ss8
Deposition date deposition_date	2004-03-23
Structure title title	GroEL
Keywords keywords	chaperonin, protein folding, CHAPERONE; 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.

1ss8__assembly_1__model_1

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

Download this curve (.dat)

1ss8__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ss8__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	64.74 Å
Rg (electron density)	63.59 Å
Total Rg	63.70 Å
Atom count	53914
Residues	7336
Excluded volume	966070 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ss8__assembly_1__model_1`	tetradecameric （14）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1ss8__assembly_2__model_1`	heptameric （7）	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)

Entity 1 Entity 1 polymer

Description description	groEL protein
Molecular weight formula_weight	55148.0 kDa
Source method src_method	man
Copy count entity_count	7

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G
Atom count atom_count	27064

AAKDVKFGNDAGVKMLRGVNVLADAVKVTLGPKGRNVVLDKSFGAPTITKDGVSVAREIELEDKFENMGAQMVKEVASKANDAAGDGTTTATVLAQAIITEGLKAVAAGMNPMDLKRGIDKAVTVAVEELKALSVPCSDSKAIAQVGTISANSDETVGKLIAEAMDKVGKEGVITVEDGTGLQDELDVVEGMQFDRGYLSPYFINKPETGAVELESPFILLADKKISNIREMLPVLEAVAKAGKPLLIIAEDVEGEALATLVVNTMRGIVKVAAVKAPGFGDRRKAMLQDIATLTGGTVISEEIGMELEKATLEDLGQAKRVVINKDTTTIIDGVGEEAAIQGRVAQIRQQIEEATSDYDREKLQERVAKLAGGVAVIKVGAATEVEMKEKKARVEDALHATRAAVEEGVVAGGGVALIRVASKLADLRGQNEDQNVGIKVALRAMEAPLRQIVLNCGEEPSVVANTVKGGDGNYGYNAATEEYGNMIDMGILDPTKVTRSALQYAASVAGLMITTECMVTDLP

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	107

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6. Fold Classification (SCOP + CATH) 21 domains

CATH v4.4 (21 domains)

Domain ID domain_id	1ss8A01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	560 — GROEL; domain 1
Homologous superfamily homologous superfamily	10 — GroEL-like equatorial domain

Domain ID domain_id	1ss8A02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	260 — GROEL; domain 2
Homologous superfamily homologous superfamily	10 — TCP-1-like chaperonin intermediate domain

Domain ID domain_id	1ss8A03
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	7 — GroEL
Homologous superfamily homologous superfamily	10 — GroEL

Domain ID domain_id	1ss8B01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	560 — GROEL; domain 1
Homologous superfamily homologous superfamily	10 — GroEL-like equatorial domain

Domain ID domain_id	1ss8B02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	260 — GROEL; domain 2
Homologous superfamily homologous superfamily	10 — TCP-1-like chaperonin intermediate domain

Domain ID domain_id	1ss8B03
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	7 — GroEL
Homologous superfamily homologous superfamily	10 — GroEL

Domain ID domain_id	1ss8C01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	560 — GROEL; domain 1
Homologous superfamily homologous superfamily	10 — GroEL-like equatorial domain

Domain ID domain_id	1ss8C02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	260 — GROEL; domain 2
Homologous superfamily homologous superfamily	10 — TCP-1-like chaperonin intermediate domain

Domain ID domain_id	1ss8C03
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	7 — GroEL
Homologous superfamily homologous superfamily	10 — GroEL

Domain ID domain_id	1ss8D01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	560 — GROEL; domain 1
Homologous superfamily homologous superfamily	10 — GroEL-like equatorial domain

Domain ID domain_id	1ss8D02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	260 — GROEL; domain 2
Homologous superfamily homologous superfamily	10 — TCP-1-like chaperonin intermediate domain

Domain ID domain_id	1ss8D03
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	7 — GroEL
Homologous superfamily homologous superfamily	10 — GroEL

Domain ID domain_id	1ss8E01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	560 — GROEL; domain 1
Homologous superfamily homologous superfamily	10 — GroEL-like equatorial domain

Domain ID domain_id	1ss8E02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	260 — GROEL; domain 2
Homologous superfamily homologous superfamily	10 — TCP-1-like chaperonin intermediate domain

Domain ID domain_id	1ss8E03
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	7 — GroEL
Homologous superfamily homologous superfamily	10 — GroEL

Domain ID domain_id	1ss8F01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	560 — GROEL; domain 1
Homologous superfamily homologous superfamily	10 — GroEL-like equatorial domain

Domain ID domain_id	1ss8F02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	260 — GROEL; domain 2
Homologous superfamily homologous superfamily	10 — TCP-1-like chaperonin intermediate domain

Domain ID domain_id	1ss8F03
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	7 — GroEL
Homologous superfamily homologous superfamily	10 — GroEL

Domain ID domain_id	1ss8G01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	560 — GROEL; domain 1
Homologous superfamily homologous superfamily	10 — GroEL-like equatorial domain

Domain ID domain_id	1ss8G02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	260 — GROEL; domain 2
Homologous superfamily homologous superfamily	10 — TCP-1-like chaperonin intermediate domain

Domain ID domain_id	1ss8G03
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	7 — GroEL
Homologous superfamily homologous superfamily	10 — GroEL

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Unit-cell length a length_a	178.380 Å
Unit-cell length b length_b	204.980 Å
Unit-cell length c length_c	280.980 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	56

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

Resolution resolution	2.700 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	0.2160
R_work r_work	0.2150
R_free r_free	0.2490

GroEL

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

groEL protein

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

1ss8__assembly_1__model_1

1ss8__assembly_1__model_1 | I(q)

1ss8__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 21 domains

CATH v4.4 (21 domains)

7. Citations (1)

GroEL

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

groEL protein

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

1ss8__assembly_1__model_1

1ss8__assembly_1__model_1 | I(q)

1ss8__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 21 domains

CATH v4.4 (21 domains)

7. Citations (1)