SAXSdb — 4ljx

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

AT-rich interactive domain-containing protein 3A

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ARI3A_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–137； UniProt 216–351 Author chain B； PDBConstruct 2–137； UniProt 216–351

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	4ljx
Deposition date deposition_date	2013-07-05
Structure title title	Crystal structure of an AT-rich interactive domain-containing protein 3A (ARID3A) from Homo sapiens at 2.21 A resolution
Keywords keywords	;ARID/BRIGHT DNA binding domain, PF01388 family, Structural Genomics, Joint Center for Structural Genomics, JCSG, Protein Structure Initiative, PSI-BIOLOGY, TRANSCRIPTION, Partnership for Stem Cell Biology, STEMCELL ;; TRANSCRIPTION
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.

4ljx__assembly_1__model_1

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

Download this curve (.dat)

4ljx__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4ljx__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.64 Å
Rg (electron density)	14.14 Å
Total Rg	15.33 Å
Atom count	993
Residues	118
Excluded volume	17984 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4ljx__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`4ljx__assembly_2__model_1`	monomeric （1）	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

SCOP 2.08 (2 domains)

Domain ID domain_id	d4ljxa_
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.3 — ARID-like
Family Family family	a.4.3.1 — ARID domain

Domain ID domain_id	d4ljxb_
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.3 — ARID-like
Family Family family	a.4.3.1 — ARID domain

CATH v4.4 (2 domains)

Domain ID domain_id	4ljxA00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	150 — DNA polymerase; domain 1
Homologous superfamily homologous superfamily	60 — ARID DNA-binding domain

Domain ID domain_id	4ljxB00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	150 — DNA polymerase; domain 1
Homologous superfamily homologous superfamily	60 — ARID DNA-binding domain

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Unit-cell length a length_a	34.924 Å
Unit-cell length b length_b	43.092 Å
Unit-cell length c length_c	44.894 Å
Unit-cell angle α angle_alpha	108.12 °
Unit-cell angle β angle_beta	82.22 °
Unit-cell angle γ angle_gamma	98.17 °
Molecules per unit cell Z z_pdb	2

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

Resolution resolution	2.210 Å
Low-resolution limit resolution_low	42.467 Å
R factor r_factor	0.1832
R_work r_work	0.1822
R_free r_free	0.2017

Description description	AT-rich interactive domain-containing protein 3A
Molecular weight formula_weight	16258.9 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	2036

Crystal structure of an AT-rich interactive domain-containing protein 3A (ARID3A) from Homo sapiens at 2.21 A resolution

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

AT-rich interactive domain-containing protein 3A

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

4ljx__assembly_1__model_1

4ljx__assembly_1__model_1 | I(q)

4ljx__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

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia Coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	55

Crystal structure of an AT-rich interactive domain-containing protein 3A (ARID3A) from Homo sapiens at 2.21 A resolution

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

AT-rich interactive domain-containing protein 3A

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

4ljx__assembly_1__model_1

4ljx__assembly_1__model_1 | I(q)

4ljx__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

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)