1ltl

THE DODECAMER STRUCTURE OF MCM FROM ARCHAEAL M. THERMOAUTOTROPHICUM

Method: X-RAY DIFFRACTION

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

DNA replication initiator (Cdc21/Cdc54)

Methanothermobacter thermautotrophicus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 12	ZINC ION × 12	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 12	ZINC ION × 12	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	O27798_METTH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 6–279； UniProt 2–275 Author chain B； PDBConstruct 6–279； UniProt 2–275 Author chain C； PDBConstruct 6–279； UniProt 2–275 Author chain D； PDBConstruct 6–279； UniProt 2–275 Author chain E； PDBConstruct 6–279； UniProt 2–275 Author chain F； PDBConstruct 6–279； UniProt 2–275

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	1ltl
Deposition date deposition_date	2002-05-20
Structure title title	THE DODECAMER STRUCTURE OF MCM FROM ARCHAEAL M. THERMOAUTOTROPHICUM
Keywords keywords	replication; REPLICATION
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.

1ltl__assembly_1__model_1

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

Download this curve (.dat)

1ltl__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ltl__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	48.84 Å
Rg (electron density)	48.61 Å
Total Rg	48.58 Å
Atom count	23304
Residues	2868
Excluded volume	415200 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ltl__assembly_1__model_1`	dodecameric （12）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1ltl__assembly_2__model_1`	dodecameric （12）	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) 24 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1ltla_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.11 — DNA replication initiator (cdc21/cdc54) N-terminal domain

Domain ID domain_id	d1ltlb_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.11 — DNA replication initiator (cdc21/cdc54) N-terminal domain

Domain ID domain_id	d1ltlc_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.11 — DNA replication initiator (cdc21/cdc54) N-terminal domain

Domain ID domain_id	d1ltld_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.11 — DNA replication initiator (cdc21/cdc54) N-terminal domain

Domain ID domain_id	d1ltle_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.11 — DNA replication initiator (cdc21/cdc54) N-terminal domain

Domain ID domain_id	d1ltlf_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.11 — DNA replication initiator (cdc21/cdc54) N-terminal domain

CATH v4.4 (18 domains)

Domain ID domain_id	1ltlA01
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	1ltlA02
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	1ltlA03
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1ltlB01
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	1ltlB02
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	1ltlB03
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1ltlC01
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	1ltlC02
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	1ltlC03
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1ltlD01
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	1ltlD02
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	1ltlD03
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1ltlE01
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	1ltlE02
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	1ltlE03
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1ltlF01
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	1ltlF02
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	1ltlF03
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	10 —

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Unit-cell length a length_a	192.321 Å
Unit-cell length b length_b	192.321 Å
Unit-cell length c length_c	365.539 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	108

Space group space_group	H 3 2
Space-group number int_tables_number	155
Crystal system crystal_system	—

Resolution resolution	3.000 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	—
R_work r_work	0.2450
R_free r_free	0.2950

Description description	DNA replication initiator (Cdc21/Cdc54)
Molecular weight formula_weight	32336.7 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	11633

THE DODECAMER STRUCTURE OF MCM FROM ARCHAEAL M. THERMOAUTOTROPHICUM

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

DNA replication initiator (Cdc21/Cdc54)

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

1ltl__assembly_1__model_1

1ltl__assembly_1__model_1 | I(q)

1ltl__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 non-polymer

6. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (6 domains)

CATH v4.4 (18 domains)

7. Citations (1)

Source organism organism	Methanothermobacter thermautotrophicus
NCBI taxonomy ID ncbi_taxonomy_id	145262
Host organism host_organism	Escherichia coli

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	6

THE DODECAMER STRUCTURE OF MCM FROM ARCHAEAL M. THERMOAUTOTROPHICUM

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

DNA replication initiator (Cdc21/Cdc54)

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

1ltl__assembly_1__model_1

1ltl__assembly_1__model_1 | I(q)

1ltl__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 non-polymer

6. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (6 domains)

CATH v4.4 (18 domains)

7. Citations (1)