SAXSdb — 4ywk

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

Cell division control protein 21

Pyrococcus furiosus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
3	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	Q8U3I4_PYRFU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–131； UniProt 2–130 Author chain A； PDBConstruct 132–206； UniProt 182–256 Author chain B； PDBConstruct 3–131； UniProt 2–130 Author chain B； PDBConstruct 132–206； UniProt 182–256

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	4ywk
Deposition date deposition_date	2015-03-20
Structure title title	Pyrococcus furiosus MCM N-terminal domain with Zinc-binding subdomain B deleted
Keywords keywords	MCM, helicase, replication, OB-fold, CELL CYCLE; CELL CYCLE
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.

4ywk__assembly_1__model_1

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

Download this curve (.dat)

4ywk__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4ywk__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	18.66 Å
Rg (electron density)	17.55 Å
Total Rg	18.57 Å
Atom count	1484
Residues	184
Excluded volume	26501 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4ywk__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`4ywk__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`4ywk__assembly_3__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	4ywkA01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1640 — mini-chromosome maintenance (MCM) complex, chain A, domain 1
Homologous superfamily homologous superfamily	10 — mini-chromosome maintenance (MCM) complex, chain A, domain 1

Domain ID domain_id	4ywkA02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	140 — Nucleic acid-binding proteins

Domain ID domain_id	4ywkB01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1640 — mini-chromosome maintenance (MCM) complex, chain A, domain 1
Homologous superfamily homologous superfamily	10 — mini-chromosome maintenance (MCM) complex, chain A, domain 1

Domain ID domain_id	4ywkB02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	140 — Nucleic acid-binding proteins

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Unit-cell length a length_a	41.958 Å
Unit-cell length b length_b	50.964 Å
Unit-cell length c length_c	52.880 Å
Unit-cell angle α angle_alpha	96.54 °
Unit-cell angle β angle_beta	94.77 °
Unit-cell angle γ angle_gamma	95.45 °
Molecules per unit cell Z z_pdb	2

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	1.550 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	0.2188
R_work r_work	0.2172
R_free r_free	0.2499

Description description	Cell division control protein 21
Molecular weight formula_weight	23675.0 kDa
Mutation mutation	deletion of internal subdomain B
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	3237

Pyrococcus furiosus MCM N-terminal domain with Zinc-binding subdomain B deleted

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

Cell division control protein 21

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

4ywk__assembly_1__model_1

4ywk__assembly_1__model_1 | I(q)

4ywk__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	Pyrococcus furiosus
NCBI taxonomy ID ncbi_taxonomy_id	186497
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	203

Pyrococcus furiosus MCM N-terminal domain with Zinc-binding subdomain B deleted

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

Cell division control protein 21

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

4ywk__assembly_1__model_1

4ywk__assembly_1__model_1 | I(q)

4ywk__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)