SAXSdb — 2qks

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

Kir3.1-prokaryotic Kir channel chimera

Mus musculus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Homooligomer	Protein 4	nonyl beta-D-glucopyranoside × 4 POTASSIUM ION × 28 water × 4	Consistent with protein count
2	Insufficient information	Homooligomer	Protein 4	POTASSIUM ION × 20 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	KCNJ3_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–44； UniProt 41–82 Author chain A； PDBConstruct 125–318； UniProt 178–371 Author chain B； PDBConstruct 3–44； UniProt 41–82 Author chain B； PDBConstruct 125–318； UniProt 178–371

Kir3.1-prokaryotic Kir channel chimera

Mus musculus

UniProt Q146M9

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Homooligomer	Protein 4	nonyl beta-D-glucopyranoside × 4 POTASSIUM ION × 28 water × 4	Consistent with protein count
2	Insufficient information	Homooligomer	Protein 4	POTASSIUM ION × 20 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q146M9_PARXL
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 45–124； UniProt 62–141 Author chain B； PDBConstruct 45–124； UniProt 62–141

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	2qks
Deposition date deposition_date	2007-07-11
Structure title title	Crystal structure of a Kir3.1-prokaryotic Kir channel chimera
Keywords keywords	CHIMERA, G-PROTEIN GATED INWARD RECTIFIER, POTASSIUM CHANNEL, SELECTIVITY FILTER, METAL TRANSPORT; METAL TRANSPORT
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.

2qks__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2qks__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2qks__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	36.89 Å
Rg (electron density)	36.50 Å
Total Rg	36.71 Å
Atom count	9093
Residues	1176
Excluded volume	163540 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2qks__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2qks__assembly_2__model_1`	tetrameric （4）	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 (4)

Entity 1 Entity 1 polymer

Description description	Kir3.1-prokaryotic Kir channel chimera
Molecular weight formula_weight	36176.6 kDa
Mutation mutation	M127A
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4919

GSKKRQRFVDKNGRCNVQHGNLGSETSRYLSDLFTTLVDLKWRWFFVSLAVLFLLLNTAFATLYMLGSAPIANQFPAGFGGAFFFSVETLATVGYGDMHPQTVYAHWIATLEIFVGMSSIALATGCAFIKMSQPKKRAETLMFSEHAVISMRDGKLTLMFRVGNLRNSHMVSAQIRCKLLKSRQTPEGEFLPLDQLELDVGFSTGADQLFLVSPLTICHVIDAKSPFYDLSQRSMQTEQFEVVVILEGIVETTGMTCQARTSYTEDEVLWGHRFFPVISLEEGFFKVDYSQFHATFEVPTPPYSVKEQEEMLLMSSPLVPR

Source Source

Source organism organism	Mus musculus
Common name common_name	Mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	nonyl beta-D-glucopyranoside
Molecular weight formula_weight	306.4 kDa
Source method src_method	man
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	POTASSIUM ION
Molecular weight formula_weight	39.1 kDa
Source method src_method	syn
Copy count entity_count	12

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	226

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	2qksA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	70 —

Domain ID domain_id	2qksA02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1400 — G protein-activated inward rectifier potassium channel 1

Domain ID domain_id	2qksB01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1400 — G protein-activated inward rectifier potassium channel 1

Domain ID domain_id	2qksB02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	70 —

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Unit-cell length a length_a	98.416 Å
Unit-cell length b length_b	98.416 Å
Unit-cell length c length_c	92.624 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 4
Space-group number int_tables_number	75
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	29.500 Å
R factor r_factor	0.2320
R_work r_work	0.2310
R_free r_free	0.2560

Crystal structure of a Kir3.1-prokaryotic Kir channel chimera

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

Kir3.1-prokaryotic Kir channel chimera

State in the Current Structure

Other States of the Same Protein in the Database

Kir3.1-prokaryotic Kir channel chimera

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

2qks__assembly_2__model_1

2qks__assembly_2__model_1 | I(q)

2qks__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

Crystal structure of a Kir3.1-prokaryotic Kir channel chimera

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

Kir3.1-prokaryotic Kir channel chimera

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Kir3.1-prokaryotic Kir channel chimera

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

2qks__assembly_2__model_1

2qks__assembly_2__model_1 | I(q)

2qks__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)