SAXSdb — 9x1g

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

Ferritin, middle subunit

Aquarana catesbeiana

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 24	MAGNESIUM ION × 216 CHLORIDE ION × 288 water × 24	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	FRI2_AQUCT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–173； UniProt 2–174

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	9x1g
Deposition date deposition_date	2025-10-02
Last revision last_revision	2026-04-15
Structure title title	Crystal structure of Frog M-ferritin WT_M161Q_L165D_K168E_H169D mutant
Keywords keywords	Ferritin, Metal binding, storage and transport, 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.

9x1g__assembly_1__model_1

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

Download this curve (.dat)

9x1g__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9x1g__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	54.02 Å
Rg (electron density)	53.10 Å
Total Rg	53.71 Å
Atom count	34712
Residues	4152
Excluded volume	610610 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9x1g__assembly_1__model_1`	24-meric （24）	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	Ferritin, middle subunit
Molecular weight formula_weight	20293.6 kDa
EC 编号 ec_number	1.16.3.1
Mutation mutation	M161Q,L165D,K168E,H169D
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1799

VSQVRQNYHSDCEAAVNRMLNLELYASYTYSSMYAFFDRDDVALHNVAEFFKEHSHEEREHAEKFMKYQNKRGGRVVLQDIKKPERDEWGNTLEAMQAALQLEKTVNQALLDLHKLATDKVDPHLCDFLESEYLEEQVKDIKRIGDFITNLKRLGLPENGQGEYDFDEDSVKE

Source Source

Source organism organism	Aquarana catesbeiana
Common name common_name	American bullfrog
NCBI taxonomy ID ncbi_taxonomy_id	8400
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 3 Entity 3 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 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	217

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Unit-cell length a length_a	183.850 Å
Unit-cell length b length_b	183.850 Å
Unit-cell length c length_c	183.850 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	96

Space group space_group	F 4 3 2
Space-group number int_tables_number	209
Crystal system crystal_system	—

Resolution resolution	1.500 Å
Low-resolution limit resolution_low	46.010 Å
R factor r_factor	—
R_work r_work	0.1330
R_free r_free	0.1540

Crystal structure of Frog M-ferritin WT_M161Q_L165D_K168E_H169D mutant

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

Ferritin, middle subunit

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

9x1g__assembly_1__model_1

9x1g__assembly_1__model_1 | I(q)

9x1g__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 (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

7. Citations (1)

Crystal structure of Frog M-ferritin WT_M161Q_L165D_K168E_H169D mutant

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

Ferritin, middle subunit

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

9x1g__assembly_1__model_1

9x1g__assembly_1__model_1 | I(q)

9x1g__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 (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

7. Citations (1)