SAXSdb — 2qya

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

Uncharacterized conserved protein

Methanopyrus kandleri AV19

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
2	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	Q8TWR4_METKA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–116； UniProt 2–114 Author chain B； PDBConstruct 4–116； UniProt 2–114 Author chain C； PDBConstruct 4–116； UniProt 2–114 Author chain D； PDBConstruct 4–116； UniProt 2–114

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	2qya
Deposition date deposition_date	2007-08-14
Structure title title	Crystal structure of an uncharacterized conserved protein from Methanopyrus kandleri
Keywords keywords	;STRUCTURAL GENOMICS, UNKNOWN FUNCTION, PSI-2, Protein Structure Initiative, New York SGX Research Center for Structural Genomics, NYSGXRC ;; 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.

2qya__assembly_1__model_1

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

Download this curve (.dat)

2qya__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2qya__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	19.66 Å
Rg (electron density)	18.53 Å
Total Rg	19.50 Å
Atom count	1764
Residues	230
Excluded volume	31482 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2qya__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2qya__assembly_2__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	2qyaA01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1860 — uncharacterized conserved protein from methanopyrus kandleri fold like
Homologous superfamily homologous superfamily	10 — uncharacterized conserved protein from methanopyrus kandleri domain like

Domain ID domain_id	2qyaB01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1860 — uncharacterized conserved protein from methanopyrus kandleri fold like
Homologous superfamily homologous superfamily	10 — uncharacterized conserved protein from methanopyrus kandleri domain like

Domain ID domain_id	2qyaC01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1860 — uncharacterized conserved protein from methanopyrus kandleri fold like
Homologous superfamily homologous superfamily	10 — uncharacterized conserved protein from methanopyrus kandleri domain like

Domain ID domain_id	2qyaD01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1860 — uncharacterized conserved protein from methanopyrus kandleri fold like
Homologous superfamily homologous superfamily	10 — uncharacterized conserved protein from methanopyrus kandleri domain like

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Unit-cell length a length_a	55.252 Å
Unit-cell length b length_b	49.386 Å
Unit-cell length c length_c	104.211 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	102.75 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

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

Resolution resolution	2.170 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2370
R_work r_work	0.2340
R_free r_free	0.2910

Description description	Uncharacterized conserved protein
Molecular weight formula_weight	13754.6 kDa
Mutation mutation	L48M, I105M
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	3630

Crystal structure of an uncharacterized conserved protein from Methanopyrus kandleri

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

Uncharacterized conserved 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

2qya__assembly_1__model_1

2qya__assembly_1__model_1 | I(q)

2qya__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	Methanopyrus kandleri AV19
NCBI taxonomy ID ncbi_taxonomy_id	190192
Host organism host_organism	Escherichia coli BL21(DE3)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	91

Crystal structure of an uncharacterized conserved protein from Methanopyrus kandleri

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

Uncharacterized conserved 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

2qya__assembly_1__model_1

2qya__assembly_1__model_1 | I(q)

2qya__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)