SAXSdb — 1q46

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

translation initiation factor 2 alpha subunit

OrganismNot specified

UniProt P20459

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	IF2A_YEAST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–175； UniProt 2–176

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	1q46
Deposition date deposition_date	2003-08-01
Structure title title	crystal structure of the eIF2 alpha subunit from saccharomyces cerevisia
Keywords keywords	initiation factor, eIF2, translation, phosphorylation site; TRANSLATION
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.

1q46__assembly_1__model_1

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

Download this curve (.dat)

1q46__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1q46__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	19.41 Å
Rg (electron density)	18.68 Å
Total Rg	19.66 Å
Atom count	1441
Residues	174
Excluded volume	25952 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1q46__assembly_1__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 (1)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1q46a1
Class class	a — All alpha proteins
Fold Fold fold	a.60 — SAM domain-like
Superfamily Superfamily superfamily	a.60.14 — eIF2alpha middle domain-like
Family Family family	a.60.14.1 — eIF2alpha middle domain-like

Domain ID domain_id	d1q46a2
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.5 — Cold shock DNA-binding domain-like

CATH v4.4 (2 domains)

Domain ID domain_id	1q46A01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	140 — Nucleic acid-binding proteins

Domain ID domain_id	1q46A02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	150 — DNA polymerase; domain 1
Homologous superfamily homologous superfamily	190 — Translation initiation factor 2; subunit 1; domain 2

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Unit-cell length a length_a	94.009 Å
Unit-cell length b length_b	94.009 Å
Unit-cell length c length_c	81.198 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 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	2.860 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2220
R_work r_work	0.2181
R_free r_free	0.2362

Description description	translation initiation factor 2 alpha subunit
Molecular weight formula_weight	20597.8 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	1441

crystal structure of the eIF2 alpha subunit from saccharomyces cerevisia

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

translation initiation factor 2 alpha 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

1q46__assembly_1__model_1

1q46__assembly_1__model_1 | I(q)

1q46__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

crystal structure of the eIF2 alpha subunit from saccharomyces cerevisia

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

translation initiation factor 2 alpha 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

1q46__assembly_1__model_1

1q46__assembly_1__model_1 | I(q)

1q46__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)