SAXSdb — 3m9i

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

Lens fiber major intrinsic protein

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 8	1,2-Distearoyl-sn-glycerophosphoethanolamine × 56 water × 8	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MIP_SHEEP
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–220； UniProt 7–226

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	3m9i
Deposition date deposition_date	2010-03-22
Structure title title	Electron crystallographic structure of lens Aquaporin-0 (AQP0) (lens MIP) in E. coli polar lipids
Keywords keywords	water channel, lens, lipid-protein interactions, MEMBRANE PROTEIN; MEMBRANE PROTEIN
Experimental Method method	ELECTRON CRYSTALLOGRAPHY

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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.

3m9i__assembly_1__model_1

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

Download this curve (.dat)

3m9i__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3m9i__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	38.94 Å
Rg (electron density)	37.48 Å
Total Rg	37.91 Å
Atom count	15528
Residues	1760
Excluded volume	289450 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3m9i__assembly_1__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	d3m9ia_
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.19.1.0 — automated matches

CATH v4.4 (1 domains)

Domain ID domain_id	3m9iA00
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	65.500 Å
Unit-cell length b length_b	65.500 Å
Unit-cell length c length_c	200.000 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 2 2
Space-group number int_tables_number	89
Crystal system crystal_system	—

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	15.890 Å
R factor r_factor	0.2500
R_work r_work	0.2500
R_free r_free	0.2840

Description description	Lens fiber major intrinsic protein
Molecular weight formula_weight	23514.4 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	1949

Electron crystallographic structure of lens Aquaporin-0 (AQP0) (lens MIP) in E. coli polar lipids

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

Lens fiber major intrinsic 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

3m9i__assembly_1__model_1

3m9i__assembly_1__model_1 | I(q)

3m9i__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 (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	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	8

Electron crystallographic structure of lens Aquaporin-0 (AQP0) (lens MIP) in E. coli polar lipids

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

Lens fiber major intrinsic 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

3m9i__assembly_1__model_1

3m9i__assembly_1__model_1 | I(q)

3m9i__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 (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)