SAXSdb — 2q3l

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

Uncharacterized protein

Shewanella loihica PV-4

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	SODIUM ION × 2 CHLORIDE ION × 2 (4S)-2-METHYL-2,4-PENTANEDIOL × 9 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	SODIUM ION × 2 CHLORIDE ION × 2 (4S)-2-METHYL-2,4-PENTANEDIOL × 9 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A3QHM0_SHELP
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–126； UniProt 1–125 Author chain B； PDBConstruct 2–126； UniProt 1–125

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	2q3l
Deposition date deposition_date	2007-05-30
Structure title title	CRYSTAL STRUCTURE OF AN UNCHARACTERIZED PROTEIN FROM DUF3478 FAMILY WITH A SPOIIAA-LIKE FOLD (SHEW_3102) FROM SHEWANELLA LOIHICA PV-4 AT 2.25 A RESOLUTION
Keywords keywords	;SPOIIAA-LIKE FOLD, STRUCTURAL GENOMICS, JOINT CENTER FOR STRUCTURAL GENOMICS, JCSG, PROTEIN STRUCTURE INITIATIVE, PSI-2, UNKNOWN FUNCTION ;; UNKNOWN FUNCTION
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.

2q3l__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2q3l__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2q3l__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	21.82 Å
Rg (electron density)	20.11 Å
Total Rg	21.31 Å
Atom count	2013
Residues	244
Excluded volume	36455 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2q3l__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2q3l__assembly_2__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 (5)

Entity 1 Entity 1 polymer

Description description	Uncharacterized protein
Molecular weight formula_weight	14273.9 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	2133

GMSSNLHGIAIGIERSQDDFYLAFKAVGKLTHEDYEQMTPLLESALAGIKTPEIVALIDITELDGLSLHAAWDDLKLGLKHGKEFKRVAIIGQGELQEWATRVANWFTPGEFKFFEDKRDALDWLC

Source Source

Source organism organism	Shewanella loihica PV-4
NCBI taxonomy ID ncbi_taxonomy_id	323850
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	SODIUM ION
Molecular weight formula_weight	23.0 kDa
Source method src_method	syn
Copy count entity_count	2

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	2

Entity 4 Entity 4 non-polymer

Description description	(4S)-2-METHYL-2,4-PENTANEDIOL
Molecular weight formula_weight	118.2 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	95

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d2q3la1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.13 — SpoIIaa-like
Superfamily Superfamily superfamily	c.13.2 — SpoIIaa-like
Family Family family	c.13.2.2 — Sfri0576-like

Domain ID domain_id	d2q3la2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d2q3lb2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.13 — SpoIIaa-like
Superfamily Superfamily superfamily	c.13.2 — SpoIIaa-like
Family Family family	c.13.2.2 — Sfri0576-like

Domain ID domain_id	d2q3lb3
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (2 domains)

Domain ID domain_id	2q3lA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	10600 — SpoIIaa-like domains

Domain ID domain_id	2q3lB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	10600 — SpoIIaa-like domains

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Unit-cell length a length_a	40.387 Å
Unit-cell length b length_b	113.963 Å
Unit-cell length c length_c	130.692 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	16

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	2.250 Å
Low-resolution limit resolution_low	28.653 Å
R factor r_factor	0.1840
R_work r_work	0.1810
R_free r_free	0.2390

CRYSTAL STRUCTURE OF AN UNCHARACTERIZED PROTEIN FROM DUF3478 FAMILY WITH A SPOIIAA-LIKE FOLD (SHEW_3102) FROM SHEWANELLA LOIHICA PV-4 AT 2.25 A RESOLUTION

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

Uncharacterized protein

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

2q3l__assembly_2__model_1

2q3l__assembly_2__model_1 | I(q)

2q3l__assembly_2__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 (5)

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 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

CATH v4.4 (2 domains)

7. Citations (1)

CRYSTAL STRUCTURE OF AN UNCHARACTERIZED PROTEIN FROM DUF3478 FAMILY WITH A SPOIIAA-LIKE FOLD (SHEW_3102) FROM SHEWANELLA LOIHICA PV-4 AT 2.25 A RESOLUTION

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

Uncharacterized protein

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

2q3l__assembly_2__model_1

2q3l__assembly_2__model_1 | I(q)

2q3l__assembly_2__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 (5)

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 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

CATH v4.4 (2 domains)

7. Citations (1)