SAXSdb — 4xbj

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

Alanine racemase, biosynthetic

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	{1-[(3-HYDROXY-METHYL-5-PHOSPHONOOXY-METHYL-PYRIDIN-4-YLMETHYL)-AMINO]-ETHYL}-PHOSPHONIC ACID × 2 SULFATE ION × 4 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	{1-[(3-HYDROXY-METHYL-5-PHOSPHONOOXY-METHYL-PYRIDIN-4-YLMETHYL)-AMINO]-ETHYL}-PHOSPHONIC ACID × 1 SULFATE ION × 4 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ALR1_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–359； UniProt 1–359 Author chain B； PDBConstruct 1–359； UniProt 1–359 Author chain C； PDBConstruct 1–359； UniProt 1–359 Author chain D； PDBConstruct 1–359； UniProt 1–359

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	4xbj
Deposition date deposition_date	2014-12-17
Structure title title	Y274F alanine racemase from E. coli inhibited by l-ala-p
Keywords keywords	ISOMERASE, ISOMERASE-ISOMERASE INHIBITOR complex; ISOMERASE/ISOMERASE 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.

4xbj__assembly_2__model_1

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

Download this curve (.dat)

4xbj__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4xbj__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	28.15 Å
Rg (electron density)	27.13 Å
Total Rg	27.77 Å
Atom count	5337
Residues	702
Excluded volume	94734 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4xbj__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`4xbj__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	Alanine racemase, biosynthetic
Molecular weight formula_weight	39185.9 kDa
EC 编号 ec_number	5.1.1.1
Mutation mutation	Y274F
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	11176

MQAATVVINRRALRHNLQRLRELAPASKMVAVVKANAYGHGLLETARTLPDADAFGVARLEEALRLRAGGITKPVLLLEGFFDARDLPTISAQHFHTAVHNEEQLAALEEASLDEPVTVWMKLDTGMHRLGVRPEQAEAFYHRLTQCKNVRQPVNIVSHFARADEPKCGATEKQLAIFNTFCEGKPGQRSIAASGGILLWPQSHFDWVRPGIILYGVSPLEDRSTGADFGCQPVMSLTSSLIAVREHKAGEPVGYGGTWVSERDTRLGVVAMGFGDGYPRAAPSGTPVLVNGREVPIVGRVAMDMICVDLGPQAQDKAGDPVILWGEGLPVERIAEMTKVSAYELITRLTSRVAMKYVD

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	{1-[(3-HYDROXY-METHYL-5-PHOSPHONOOXY-METHYL-PYRIDIN-4-YLMETHYL)-AMINO]-ETHYL}-PHOSPHONIC ACID
Molecular weight formula_weight	356.2 kDa
Source method src_method	syn
Copy count entity_count	3

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	8

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	236

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6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

Domain ID domain_id	4xbjA01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	37 — Lyase, Ornithine Decarboxylase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Lyase, Ornithine Decarboxylase; Chain A, domain 1

Domain ID domain_id	4xbjA02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	10 — Alanine racemase

Domain ID domain_id	4xbjB01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	37 — Lyase, Ornithine Decarboxylase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Lyase, Ornithine Decarboxylase; Chain A, domain 1

Domain ID domain_id	4xbjB02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	10 — Alanine racemase

Domain ID domain_id	4xbjC01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	37 — Lyase, Ornithine Decarboxylase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Lyase, Ornithine Decarboxylase; Chain A, domain 1

Domain ID domain_id	4xbjC02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	10 — Alanine racemase

Domain ID domain_id	4xbjD01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	37 — Lyase, Ornithine Decarboxylase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Lyase, Ornithine Decarboxylase; Chain A, domain 1

Domain ID domain_id	4xbjD02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	10 — Alanine racemase

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Unit-cell length a length_a	147.978 Å
Unit-cell length b length_b	147.978 Å
Unit-cell length c length_c	163.578 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	24

Space group space_group	P 6
Space-group number int_tables_number	168
Crystal system crystal_system	—

Resolution resolution	2.250 Å
Low-resolution limit resolution_low	19.900 Å
R factor r_factor	0.1691
R_work r_work	0.1673
R_free r_free	0.2022

Y274F alanine racemase from E. coli inhibited by l-ala-p

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

Alanine racemase, biosynthetic

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

4xbj__assembly_2__model_1

4xbj__assembly_2__model_1 | I(q)

4xbj__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) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)

Y274F alanine racemase from E. coli inhibited by l-ala-p

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

Alanine racemase, biosynthetic

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

4xbj__assembly_2__model_1

4xbj__assembly_2__model_1 | I(q)

4xbj__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) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)