SAXSdb — 3blc

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

Inner membrane protein oxaA

Escherichia coli K12

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 homooligomer	Homooligomer	Protein 4	water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	OXAA_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–316； UniProt 26–340 Author chain B； PDBConstruct 2–316； UniProt 26–340

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	3blc
Deposition date deposition_date	2007-12-10
Structure title title	Crystal structure of the periplasmic domain of the Escherichia Coli YIDC
Keywords keywords	YidC, membrane assembly facilitator, chaperone, periplasmic domain, Inner membrane, Transmembrane, OXAA, PROTEIN TRANSPORT; CHAPERONE,PROTEIN TRANSPORT
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.

3blc__assembly_1__model_1

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

Download this curve (.dat)

3blc__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3blc__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.34 Å
Rg (electron density)	19.46 Å
Total Rg	20.33 Å
Atom count	2154
Residues	276
Excluded volume	38208 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3blc__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3blc__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`3blc__assembly_3__model_1`	tetrameric （4）	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) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	3blcA00
Class class	2 — Mainly Beta
Architecture architecture	70 — Distorted Sandwich
Topology topology	98 — Beta-galactosidase; Chain A, domain 5
Homologous superfamily homologous superfamily	90 —

Domain ID domain_id	3blcB00
Class class	2 — Mainly Beta
Architecture architecture	70 — Distorted Sandwich
Topology topology	98 — Beta-galactosidase; Chain A, domain 5
Homologous superfamily homologous superfamily	90 —

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Unit-cell length a length_a	126.127 Å
Unit-cell length b length_b	126.127 Å
Unit-cell length c length_c	288.459 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	32

Space group space_group	I 41 2 2
Space-group number int_tables_number	98
Crystal system crystal_system	—

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	0.2135
R_work r_work	0.2117
R_free r_free	0.2490

Description description	Inner membrane protein oxaA
Molecular weight formula_weight	35963.9 kDa
Mutation mutation	E228A, K229A, E231A, K232A, K234A
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	4371

Crystal structure of the periplasmic domain of the Escherichia Coli YIDC

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

Inner membrane protein oxaA

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

3blc__assembly_1__model_1

3blc__assembly_1__model_1 | I(q)

3blc__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) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Escherichia coli K12
NCBI taxonomy ID ncbi_taxonomy_id	83333
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	80

Crystal structure of the periplasmic domain of the Escherichia Coli YIDC

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

Inner membrane protein oxaA

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

3blc__assembly_1__model_1

3blc__assembly_1__model_1 | I(q)

3blc__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) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)