SAXSdb — 1kjn

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

MTH0777

Methanothermobacter thermautotrophicus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	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	O26871_METTH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–157； UniProt 1–157 Author chain B； PDBConstruct 1–157； UniProt 1–157

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	1kjn
Deposition date deposition_date	2001-12-04
Structure title title	Structure of MT0777
Keywords keywords	;hypotethical protein, structural genomics, PSI, Protein Structure Initiative, Midwest Center for Structural Genomics, MCSG, UNKNOWN FUNCTION ;; STRUCTURAL GENOMICS, UNKNOWN FUNCTION
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.

1kjn__assembly_1__model_1

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

Download this curve (.dat)

1kjn__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1kjn__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.31 Å
Rg (electron density)	20.07 Å
Total Rg	20.85 Å
Atom count	2342
Residues	296
Excluded volume	42094 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1kjn__assembly_1__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

SCOP 2.08 (2 domains)

Domain ID domain_id	d1kjna_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.115 — Hypothetical protein MTH777 (MT0777)
Superfamily Superfamily superfamily	c.115.1 — Hypothetical protein MTH777 (MT0777)
Family Family family	c.115.1.1 — Hypothetical protein MTH777 (MT0777)

Domain ID domain_id	d1kjnb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.115 — Hypothetical protein MTH777 (MT0777)
Superfamily Superfamily superfamily	c.115.1 — Hypothetical protein MTH777 (MT0777)
Family Family family	c.115.1.1 — Hypothetical protein MTH777 (MT0777)

CATH v4.4 (2 domains)

Domain ID domain_id	1kjnA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	10160 — MTH777-like

Domain ID domain_id	1kjnB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	10160 — MTH777-like

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Unit-cell length a length_a	75.590 Å
Unit-cell length b length_b	62.280 Å
Unit-cell length c length_c	68.840 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	8

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	48.070 Å
R factor r_factor	—
R_work r_work	0.2170
R_free r_free	0.2500

Description description	MTH0777
Molecular weight formula_weight	17479.4 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	2515

Structure of MT0777

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

MTH0777

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

1kjn__assembly_1__model_1

1kjn__assembly_1__model_1 | I(q)

1kjn__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	Methanothermobacter thermautotrophicus
NCBI taxonomy ID ncbi_taxonomy_id	145262
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	173

Structure of MT0777

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

MTH0777

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

1kjn__assembly_1__model_1

1kjn__assembly_1__model_1 | I(q)

1kjn__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)