SAXSdb — 1k56

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

OXA10 beta-lactamase

Pseudomonas aeruginosa

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	SULFATE ION × 3 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	SULFATE ION × 3 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BLP2_PSEAE
Isoform	—
PDB entities	1, 2
Chains and sequence ranges	Author chain A； PDBConstruct 1–246； UniProt 1–246 Author chain B； PDBConstruct 1–246； UniProt 1–246 Author chain C； PDBConstruct 1–246； UniProt 1–246 Author chain D； PDBConstruct 1–246； UniProt 1–246

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	1k56
Deposition date deposition_date	2001-10-10
Structure title title	OXA 10 class D beta-lactamase at pH 6.5
Keywords keywords	beta-lactamase, antibiotic resistance, carbamylation, HYDROLASE; HYDROLASE
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.

1k56__assembly_1__model_1

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

Download this curve (.dat)

1k56__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1k56__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.16 Å
Rg (electron density)	23.92 Å
Total Rg	24.84 Å
Atom count	3796
Residues	477
Excluded volume	67756 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1k56__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1k56__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 (4)

Entity 1 Entity 1 polymer

Description description	OXA10 beta-lactamase
Molecular weight formula_weight	27567.3 kDa
EC 编号 ec_number	3.5.2.6
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	8390

SITENTSWNKEFSAEAVNGVFVLCKSSSKSCATNDLARASKEYLPASTFKIPNAIIGLETGVIKNEHQVFKWDGKPRAMKQWERDLTLRGAIQVSAVPVFQQIAREVGEVRMQKYLKKFSYGNQNISGGIDKFWLEGQLRISAVNQVEFLESLYLNKLSASKENQLIVKEALVTEAAPEYLVHSKTGFSGVGTESNPGVAWWVGWVEKETEVYFFAFNMDIDNESKLPLRKSIPTKIMESEGIIGG

Source Source

Source organism organism	Pseudomonas aeruginosa
NCBI taxonomy ID ncbi_taxonomy_id	287
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 polymer

Description description	OXA10 beta-lactamase
Molecular weight formula_weight	27524.3 kDa
EC 编号 ec_number	3.5.2.6
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

SITENTSWNKEFSAEAVNGVFVLCKSSSKSCATNDLARASKEYLPASTFKIPNAIIGLETGVIKNEHQVFKWDGKPRAMKQWERDLTLRGAIQVSAVPVFQQIAREVGEVRMQKYLKKFSYGNQNISGGIDKFWLEGQLRISAVNQVEFLESLYLNKLSASKENQLIVKEALVTEAAPEYLVHSKTGFSGVGTESNPGVAWWVGWVEKETEVYFFAFNMDIDNESKLPLRKSIPTKIMESEGIIGG

Source Source

Source organism organism	Pseudomonas aeruginosa
NCBI taxonomy ID ncbi_taxonomy_id	287
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	684

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1k56a_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.3 — beta-lactamase/transpeptidase-like
Superfamily Superfamily superfamily	e.3.1 — beta-lactamase/transpeptidase-like
Family Family family	e.3.1.1 — beta-Lactamase/D-ala carboxypeptidase

Domain ID domain_id	d1k56b_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.3 — beta-lactamase/transpeptidase-like
Superfamily Superfamily superfamily	e.3.1 — beta-lactamase/transpeptidase-like
Family Family family	e.3.1.1 — beta-Lactamase/D-ala carboxypeptidase

Domain ID domain_id	d1k56c_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.3 — beta-lactamase/transpeptidase-like
Superfamily Superfamily superfamily	e.3.1 — beta-lactamase/transpeptidase-like
Family Family family	e.3.1.1 — beta-Lactamase/D-ala carboxypeptidase

Domain ID domain_id	d1k56d_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.3 — beta-lactamase/transpeptidase-like
Superfamily Superfamily superfamily	e.3.1 — beta-lactamase/transpeptidase-like
Family Family family	e.3.1.1 — beta-Lactamase/D-ala carboxypeptidase

CATH v4.4 (4 domains)

Domain ID domain_id	1k56A00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	710 — Beta-lactamase
Homologous superfamily homologous superfamily	10 — DD-peptidase/beta-lactamase superfamily

Domain ID domain_id	1k56B00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	710 — Beta-lactamase
Homologous superfamily homologous superfamily	10 — DD-peptidase/beta-lactamase superfamily

Domain ID domain_id	1k56C00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	710 — Beta-lactamase
Homologous superfamily homologous superfamily	10 — DD-peptidase/beta-lactamase superfamily

Domain ID domain_id	1k56D00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	710 — Beta-lactamase
Homologous superfamily homologous superfamily	10 — DD-peptidase/beta-lactamase superfamily

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Unit-cell length a length_a	66.652 Å
Unit-cell length b length_b	82.430 Å
Unit-cell length c length_c	101.715 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	95.49 °
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	1.700 Å
Low-resolution limit resolution_low	27.000 Å
R factor r_factor	0.1841
R_work r_work	0.1833
R_free r_free	0.2207

OXA 10 class D beta-lactamase at pH 6.5

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

OXA10 beta-lactamase

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

1k56__assembly_1__model_1

1k56__assembly_1__model_1 | I(q)

1k56__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (3)

OXA 10 class D beta-lactamase at pH 6.5

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

OXA10 beta-lactamase

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

1k56__assembly_1__model_1

1k56__assembly_1__model_1 | I(q)

1k56__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (3)