SAXSdb — 4eld

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

Small heat shock protein HSP16.5

Methanocaldococcus jannaschii

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 48	water × 48	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	HSPS_METJA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–161； UniProt 1–147 Author chain B； PDBConstruct 1–161； UniProt 1–147

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	4eld
Deposition date deposition_date	2012-04-10
Structure title title	Crystal Structure of an Activated Variant of Small Heat Shock Protein Hsp16.5
Keywords keywords	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.

4eld__assembly_1__model_1

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

Download this curve (.dat)

4eld__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4eld__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	74.05 Å
Rg (electron density)	72.82 Å
Total Rg	73.09 Å
Atom count	42984
Residues	5544
Excluded volume	779110 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4eld__assembly_1__model_1`	48-meric （48）	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

SCOP 2.08 (2 domains)

Domain ID domain_id	d4elda_
Class class	b — All beta proteins
Fold Fold fold	b.15 — HSP20-like chaperones
Superfamily Superfamily superfamily	b.15.1 — HSP20-like chaperones
Family Family family	b.15.1.1 — HSP20

Domain ID domain_id	d4eldb_
Class class	b — All beta proteins
Fold Fold fold	b.15 — HSP20-like chaperones
Superfamily Superfamily superfamily	b.15.1 — HSP20-like chaperones
Family Family family	b.15.1.1 — HSP20

CATH v4.4 (2 domains)

Domain ID domain_id	4eldA00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	790 —

Domain ID domain_id	4eldB00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	790 —

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Unit-cell length a length_a	184.583 Å
Unit-cell length b length_b	184.583 Å
Unit-cell length c length_c	184.583 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	96

Space group space_group	I 4 3 2
Space-group number int_tables_number	211
Crystal system crystal_system	—

Resolution resolution	2.701 Å
Low-resolution limit resolution_low	49.332 Å
R factor r_factor	0.2161
R_work r_work	0.2138
R_free r_free	0.2367

Description description	Small heat shock protein HSP16.5
Molecular weight formula_weight	17755.5 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	1801

Crystal Structure of an Activated Variant of Small Heat Shock Protein Hsp16.5

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

Small heat shock protein HSP16.5

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

4eld__assembly_1__model_1

4eld__assembly_1__model_1 | I(q)

4eld__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

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Methanocaldococcus jannaschii
NCBI taxonomy ID ncbi_taxonomy_id	243232
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	10

Crystal Structure of an Activated Variant of Small Heat Shock Protein Hsp16.5

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

Small heat shock protein HSP16.5

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

4eld__assembly_1__model_1

4eld__assembly_1__model_1 | I(q)

4eld__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

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)