SAXSdb — 1q34

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

Ubiquitin-conjugating enzyme E2-21.5 kDa

Caenorhabditis elegans

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
3	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	UBC1_CAEEL
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–163； UniProt 1–163 Author chain B； PDBConstruct 1–163； UniProt 1–163 Author chain C； PDBConstruct 1–163； UniProt 1–163

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	1q34
Deposition date deposition_date	2003-07-28
Structure title title	Crystal structures of two UBC (E2) enzymes of the ubiquitin-conjugating system in Caenorhabditis elegans
Keywords keywords	;alpha-beta(4)-alpha(3); core: meander beta-sheet plus one helix 2, Structural Genomics, PSI, Protein Structure Initiative, Southeast Collaboratory for Structural Genomics, SECSG, LIGASE ;; LIGASE
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.

1q34__assembly_1__model_1

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

Download this curve (.dat)

1q34__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1q34__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	17.15 Å
Rg (electron density)	15.86 Å
Total Rg	16.91 Å
Atom count	1172
Residues	149
Excluded volume	20755 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1q34__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1q34__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1q34__assembly_3__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) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1q34a_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.20 — UBC-like
Superfamily Superfamily superfamily	d.20.1 — UBC-like
Family Family family	d.20.1.1 — UBC-related

Domain ID domain_id	d1q34b_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.20 — UBC-like
Superfamily Superfamily superfamily	d.20.1 — UBC-like
Family Family family	d.20.1.1 — UBC-related

Domain ID domain_id	d1q34c_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.20 — UBC-like
Superfamily Superfamily superfamily	d.20.1 — UBC-like
Family Family family	d.20.1.1 — UBC-related

CATH v4.4 (3 domains)

Domain ID domain_id	1q34A00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	110 — Ubiquitin Conjugating Enzyme
Homologous superfamily homologous superfamily	10 — Ubiquitin Conjugating Enzyme

Domain ID domain_id	1q34B00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	110 — Ubiquitin Conjugating Enzyme
Homologous superfamily homologous superfamily	10 — Ubiquitin Conjugating Enzyme

Domain ID domain_id	1q34C00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	110 — Ubiquitin Conjugating Enzyme
Homologous superfamily homologous superfamily	10 — Ubiquitin Conjugating Enzyme

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Unit-cell length a length_a	100.922 Å
Unit-cell length b length_b	37.584 Å
Unit-cell length c length_c	103.881 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	117.58 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	6

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.900 Å
Low-resolution limit resolution_low	19.740 Å
R factor r_factor	0.2330
R_work r_work	0.2330
R_free r_free	0.2660

Description description	Ubiquitin-conjugating enzyme E2-21.5 kDa
Molecular weight formula_weight	18612.7 kDa
EC 编号 ec_number	6.3.2.19
Source method src_method	man
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	3577

Crystal structures of two UBC (E2) enzymes of the ubiquitin-conjugating system in Caenorhabditis elegans

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

Ubiquitin-conjugating enzyme E2-21.5 kDa

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

1q34__assembly_1__model_1

1q34__assembly_1__model_1 | I(q)

1q34__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) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (1)

Source organism organism	Caenorhabditis elegans
NCBI taxonomy ID ncbi_taxonomy_id	6239
Host organism host_organism	Escherichia coli BL21(DE3)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	61

Crystal structures of two UBC (E2) enzymes of the ubiquitin-conjugating system in Caenorhabditis elegans

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

Ubiquitin-conjugating enzyme E2-21.5 kDa

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

1q34__assembly_1__model_1

1q34__assembly_1__model_1 | I(q)

1q34__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) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (1)