SAXSdb — 2q37

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

OHCU decarboxylase

Arabidopsis thaliana

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	1-[(4S)-2,5-DIOXOIMIDAZOLIDIN-4-YL]UREA × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TTHL_ARATH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 21–181； UniProt 1–161

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	2q37
Deposition date deposition_date	2007-05-30
Structure title title	Crystal structure of OHCU decarboxylase in the presence of (S)-allantoin
Keywords keywords	OHCU, 2-oxo-4-hydroxy-4-carboxy-5-ureidoimidazoline, PLANT PROTEIN, LYASE; PLANT PROTEIN, LYASE
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.

2q37__assembly_1__model_1

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

Download this curve (.dat)

2q37__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2q37__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	22.33 Å
Rg (electron density)	21.48 Å
Total Rg	22.25 Å
Atom count	2274
Residues	274
Excluded volume	40377 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2q37__assembly_1__model_1`	dimeric （2）	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)

Entity 1 Entity 1 polymer

Description description	OHCU decarboxylase
Molecular weight formula_weight	20837.2 kDa
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	1158

MGSSHHHHHSSGENLYFQGHMAMEIGEDEWKVCCGSSEFAKQMSTSGPLTSQEAIYTARDIWFNQVNVTDWLEAFSAHPQIGNTPSPSINSDFARRSVSEQSTAFATTSASALQELAEWNVLYKKKFGFIFIICASGRTHAEMLHALKERYENRPIVELEIAAMEQMKITELRMAKLFSDK

Source Source

Source organism organism	Arabidopsis thaliana
Common name common_name	thale cress
NCBI taxonomy ID ncbi_taxonomy_id	3702
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	1-[(4S)-2,5-DIOXOIMIDAZOLIDIN-4-YL]UREA
Molecular weight formula_weight	158.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	21

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d2q37a1
Class class	a — All alpha proteins
Fold Fold fold	a.288 — UraD-like
Superfamily Superfamily superfamily	a.288.1 — UraD-Like
Family Family family	a.288.1.1 — UraD-like

CATH v4.4 (1 domains)

Domain ID domain_id	2q37A00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	3330 — UraD-like
Homologous superfamily homologous superfamily	10 — Oxo-4-hydroxy-4-carboxy-5-ureidoimidazoline decarboxylase

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Unit-cell length a length_a	73.582 Å
Unit-cell length b length_b	73.582 Å
Unit-cell length c length_c	69.647 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	6

Space group space_group	P 31 2 1
Space-group number int_tables_number	152
Crystal system crystal_system	—

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	0.2150
R_work r_work	0.2150
R_free r_free	0.2590

Crystal structure of OHCU decarboxylase in the presence of (S)-allantoin

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

OHCU decarboxylase

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

2q37__assembly_1__model_1

2q37__assembly_1__model_1 | I(q)

2q37__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

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)

Crystal structure of OHCU decarboxylase in the presence of (S)-allantoin

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

OHCU decarboxylase

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

2q37__assembly_1__model_1

2q37__assembly_1__model_1 | I(q)

2q37__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

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)