SAXSdb — 1a8t

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

METALLO-BETA-LACTAMASE

Bacteroides fragilis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	ZINC ION × 2 2-BUTYL-6-HYDROXY-3-[2'-(1H-TETRAZOL-5-YL)-BIPHENYL-4-YLMETHYL]-3H-QUINAZOLIN-4-ONE × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	ZINC ION × 2 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BLAB_BACFR
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–232； UniProt 18–249 Author chain B； PDBConstruct 1–232； UniProt 18–249

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	1a8t
Deposition date deposition_date	1998-03-23
Structure title title	METALLO-BETA-LACTAMASE IN COMPLEX WITH L-159,061
Keywords keywords	HYDROLASE, BETA-LACTAMASE, METALLO-BETA-LACTAMASE, ZINC, ANTIBIOTIC RESISTANCE; 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.

1a8t__assembly_1__model_1

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

Download this curve (.dat)

1a8t__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1a8t__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	17.58 Å
Rg (electron density)	16.36 Å
Total Rg	17.33 Å
Atom count	1800
Residues	230
Excluded volume	31867 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1a8t__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1a8t__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	METALLO-BETA-LACTAMASE
Molecular weight formula_weight	25387.7 kDa
EC 编号 ec_number	3.5.2.6
Mutation mutation	A171T, D208N
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	3735

AQKSVKISDDISITQLSDKVYTYVSLAEIEGWGMVPSNGMIVINNHQAALLDTPINDAQTEMLVNWVTDSLHAKVTTFIPNHWHGDCIGGLGYLQRKGVQSYANQMTIDLAKEKGLPVPEHGFTDSLTVSLDGMPLQCYYLGGGHATDNIVVWLPTENILFGGCMLKDNQTTSIGNISDADVTAWPKTLDKVKAKFPSARYVVPGHGNYGGTELIEHTKQIVNQYIESTSKP

Source Source

Source organism organism	Bacteroides fragilis
NCBI taxonomy ID ncbi_taxonomy_id	817
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	2-BUTYL-6-HYDROXY-3-[2'-(1H-TETRAZOL-5-YL)-BIPHENYL-4-YLMETHYL]-3H-QUINAZOLIN-4-ONE
Molecular weight formula_weight	452.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	183

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1a8ta_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.157 — Metallo-hydrolase/oxidoreductase
Superfamily Superfamily superfamily	d.157.1 — Metallo-hydrolase/oxidoreductase
Family Family family	d.157.1.1 — Zn metallo-beta-lactamase

Domain ID domain_id	d1a8tb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.157 — Metallo-hydrolase/oxidoreductase
Superfamily Superfamily superfamily	d.157.1 — Metallo-hydrolase/oxidoreductase
Family Family family	d.157.1.1 — Zn metallo-beta-lactamase

CATH v4.4 (2 domains)

Domain ID domain_id	1a8tA00
Class class	3 — Alpha Beta
Architecture architecture	60 — 4-Layer Sandwich
Topology topology	15 — Metallo-beta-lactamase; Chain A
Homologous superfamily homologous superfamily	10 — Ribonuclease Z/Hydroxyacylglutathione hydrolase-like

Domain ID domain_id	1a8tB00
Class class	3 — Alpha Beta
Architecture architecture	60 — 4-Layer Sandwich
Topology topology	15 — Metallo-beta-lactamase; Chain A
Homologous superfamily homologous superfamily	10 — Ribonuclease Z/Hydroxyacylglutathione hydrolase-like

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Unit-cell length a length_a	71.360 Å
Unit-cell length b length_b	170.230 Å
Unit-cell length c length_c	40.660 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	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.550 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	0.1810
R_work r_work	—
R_free r_free	0.3190

METALLO-BETA-LACTAMASE IN COMPLEX WITH L-159,061

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

METALLO-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

1a8t__assembly_1__model_1

1a8t__assembly_1__model_1 | I(q)

1a8t__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 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 (3)

METALLO-BETA-LACTAMASE IN COMPLEX WITH L-159,061

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

METALLO-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

1a8t__assembly_1__model_1

1a8t__assembly_1__model_1 | I(q)

1a8t__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 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 (3)