SAXSdb — 1j4n

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

AQUAPORIN 1

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	nonyl beta-D-glucopyranoside × 12 water × 4	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 8	nonyl beta-D-glucopyranoside × 24 water × 8	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	AQP1_BOVIN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–271； UniProt 1–271

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	1j4n
Deposition date deposition_date	2001-10-19
Structure title title	Crystal Structure of the AQP1 water channel
Keywords keywords	MEMBRANE PROTEIN, CHANNEL PROTEIN, TRANSMEMBRANE HELICES; MEMBRANE PROTEIN
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.

1j4n__assembly_1__model_1

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

Download this curve (.dat)

1j4n__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1j4n__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.80 Å
Rg (electron density)	27.94 Å
Total Rg	28.98 Å
Atom count	7660
Residues	996
Excluded volume	139790 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1j4n__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1j4n__assembly_2__model_1`	octameric （8）	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 (3)

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d1j4na_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.19 — Aquaporin-like
Superfamily Superfamily superfamily	f.19.1 — Aquaporin-like
Family Family family	f.19.1.1 — Aquaporin-like

CATH v4.4 (1 domains)

Domain ID domain_id	1j4nA00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	1080 — Glycerol uptake facilitator protein
Homologous superfamily homologous superfamily	10 — Glycerol uptake facilitator protein.

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Unit-cell length a length_a	93.331 Å
Unit-cell length b length_b	93.331 Å
Unit-cell length c length_c	180.490 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	16

Space group space_group	I 4 2 2
Space-group number int_tables_number	97
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	15.000 Å
R factor r_factor	—
R_work r_work	0.2660
R_free r_free	0.3080

Description description	AQUAPORIN 1
Molecular weight formula_weight	28824.4 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2029

Crystal Structure of the AQP1 water channel

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

AQUAPORIN 1

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

1j4n__assembly_1__model_1

1j4n__assembly_1__model_1 | I(q)

1j4n__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)

Description description	nonyl beta-D-glucopyranoside
Molecular weight formula_weight	306.4 kDa
Source method src_method	man
Copy count entity_count	3

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	114

Crystal Structure of the AQP1 water channel

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

AQUAPORIN 1

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

1j4n__assembly_1__model_1

1j4n__assembly_1__model_1 | I(q)

1j4n__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)