1e69

SMC head domain from Thermotoga maritima

Method: X-RAY DIFFRACTION

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

CHROMOSOME SEGREGATION SMC PROTEIN

THERMOTOGA MARITIMA

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
4	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
5	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
6	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9X0R4
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–152； UniProt 1–152 Author chain A； PDBConstruct 167–314； UniProt 1023–1170 Author chain B； PDBConstruct 1–152； UniProt 1–152 Author chain B； PDBConstruct 167–314； UniProt 1023–1170 Author chain C； PDBConstruct 1–152； UniProt 1–152 Author chain C； PDBConstruct 167–314； UniProt 1023–1170 Author chain D； PDBConstruct 1–152； UniProt 1–152 Author chain D； PDBConstruct 167–314； UniProt 1023–1170 Author chain E； PDBConstruct 1–152； UniProt 1–152 Author chain E； PDBConstruct 167–314； UniProt 1023–1170 Author chain F； PDBConstruct 1–152； UniProt 1–152 Author chain F； PDBConstruct 167–314； UniProt 1023–1170

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	1e69
Deposition date deposition_date	2000-08-09
Structure title title	SMC head domain from Thermotoga maritima
Keywords keywords	CHROMOSOME SEGREGATION, SMC, STRUCTURAL MAINTENANCE OF CHROMOSOMES, COILED COIL; CHROMOSOME SEGREGATION
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.

1e69__assembly_1__model_1

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

Download this curve (.dat)

1e69__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1e69__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.33 Å
Rg (electron density)	20.12 Å
Total Rg	21.00 Å
Atom count	2066
Residues	263
Excluded volume	37092 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1e69__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1e69__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1e69__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`1e69__assembly_4__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`1e69__assembly_5__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
6	1	`1e69__assembly_6__model_1`	monomeric （1）	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 (1)

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1e69a_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamily	c.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family family	c.37.1.12 — ABC transporter ATPase domain-like

Domain ID domain_id	d1e69b_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamily	c.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family family	c.37.1.12 — ABC transporter ATPase domain-like

Domain ID domain_id	d1e69c_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamily	c.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family family	c.37.1.12 — ABC transporter ATPase domain-like

Domain ID domain_id	d1e69d_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamily	c.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family family	c.37.1.12 — ABC transporter ATPase domain-like

Domain ID domain_id	d1e69e_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamily	c.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family family	c.37.1.12 — ABC transporter ATPase domain-like

Domain ID domain_id	d1e69f_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamily	c.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family family	c.37.1.12 — ABC transporter ATPase domain-like

CATH v4.4 (6 domains)

Domain ID domain_id	1e69A00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	300 — P-loop containing nucleotide triphosphate hydrolases

Domain ID domain_id	1e69B00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	300 — P-loop containing nucleotide triphosphate hydrolases

Domain ID domain_id	1e69C00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	300 — P-loop containing nucleotide triphosphate hydrolases

Domain ID domain_id	1e69D00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	300 — P-loop containing nucleotide triphosphate hydrolases

Domain ID domain_id	1e69E00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	300 — P-loop containing nucleotide triphosphate hydrolases

Domain ID domain_id	1e69F00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	300 — P-loop containing nucleotide triphosphate hydrolases

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Unit-cell length a length_a	134.000 Å
Unit-cell length b length_b	49.190 Å
Unit-cell length c length_c	233.880 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	94.63 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	3.100 Å
Low-resolution limit resolution_low	100.000 Å
R factor r_factor	0.2500
R_work r_work	0.2500
R_free r_free	0.2720

Description description	CHROMOSOME SEGREGATION SMC PROTEIN
Molecular weight formula_weight	35892.0 kDa
Source method src_method	man
Copy count entity_count	6

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	12396

SMC head domain from Thermotoga maritima

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

CHROMOSOME SEGREGATION SMC 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

1e69__assembly_1__model_1

1e69__assembly_1__model_1 | I(q)

1e69__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)

Source organism organism	THERMOTOGA MARITIMA
NCBI taxonomy ID ncbi_taxonomy_id	2336
Host organism host_organism	ESCHERICHIA COLI BL21(DE3)

SMC head domain from Thermotoga maritima

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

CHROMOSOME SEGREGATION SMC 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

1e69__assembly_1__model_1

1e69__assembly_1__model_1 | I(q)

1e69__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)