SAXSdb — 3g2z

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

Beta-lactamase CTX-M-9a

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	3-(1H-tetrazol-5-ylamino)cyclohex-2-en-1-one × 1 DIMETHYL SULFOXIDE × 3 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	3-(1H-tetrazol-5-ylamino)cyclohex-2-en-1-one × 1 DIMETHYL SULFOXIDE × 4 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9L5C8_ECOLX
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–263； UniProt 29–291 Author chain B； PDBConstruct 1–263； UniProt 29–291

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	3g2z
Deposition date deposition_date	2009-02-01
Structure title title	CTX-M-9 class A beta-lactamase complexed with compound 2 (GZ2)
Keywords keywords	;CTX-M, beta-lactamase, molecular docking, fragment, inhibitor, Antibiotic resistance, Hydrolase, Plasmid, HYDROLASE-HYDROLASE INHIBITOR COMPLEX ;; HYDROLASE/HYDROLASE INHIBITOR
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.

3g2z__assembly_2__model_1

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

Download this curve (.dat)

3g2z__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3g2z__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	18.42 Å
Rg (electron density)	17.42 Å
Total Rg	18.29 Å
Atom count	1976
Residues	261
Excluded volume	35025 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3g2z__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3g2z__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Description description	Beta-lactamase CTX-M-9a
Molecular weight formula_weight	27972.5 kDa
EC 编号 ec_number	3.5.2.6
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	4619

QTSAVQQKLAALEKSSGGRLGVALIDTADNTQVLYRGDERFPMCSTSKVMAAAAVLKQSETQKQLLNQPVEIKPADLVNYNPIAEKHVNGTMTLAELSAAALQYSDNTAMNKLIAQLGGPGGVTAFARAIGDETFRLDRTEPTLNTAIPGDPRDTTTPRAMAQTLRQLTLGHALGETQRAQLVTWLKGNTTGAASIRAGLPTSWTAGDKTGSGDYGTTNDIAVIWPQGRAPLVLVTYFTQPQQNAESRRDVLASAARIIAEGL

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	3-(1H-tetrazol-5-ylamino)cyclohex-2-en-1-one
Molecular weight formula_weight	179.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	DIMETHYL SULFOXIDE
Molecular weight formula_weight	78.1 kDa
Source method src_method	syn
Copy count entity_count	7

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	576

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d3g2za_
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	d3g2zb_
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 (2 domains)

Domain ID domain_id	3g2zA00
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	3g2zB00
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	45.211 Å
Unit-cell length b length_b	107.256 Å
Unit-cell length c length_c	47.512 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	101.68 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	1.500 Å
Low-resolution limit resolution_low	44.280 Å
R factor r_factor	0.1530
R_work r_work	0.1510
R_free r_free	0.1880

CTX-M-9 class A beta-lactamase complexed with compound 2 (GZ2)

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

Beta-lactamase CTX-M-9a

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

3g2z__assembly_2__model_1

3g2z__assembly_2__model_1 | I(q)

3g2z__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

CTX-M-9 class A beta-lactamase complexed with compound 2 (GZ2)

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

Beta-lactamase CTX-M-9a

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

3g2z__assembly_2__model_1

3g2z__assembly_2__model_1 | I(q)

3g2z__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)