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3k71

Structure of integrin alphaX beta2 ectodomain

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Integrin alpha-X

Homo sapiens

UniProt P20702

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Other combination Heteromer Protein 2 其他Polymer 4 Integrin beta-2 × 1 （P05107） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 3 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 CALCIUM ION × 4 Consistent with protein count
2 Other combination Heteromer Protein 2 其他Polymer 3 Integrin beta-2 × 1 （P05107） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 CALCIUM ION × 4 Consistent with protein count
3 Other combination Heteromer Protein 2 其他Polymer 3 Integrin beta-2 × 1 （P05107） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 CALCIUM ION × 4 Consistent with protein count
4 Other combination Heteromer Protein 2 其他Polymer 3 Integrin beta-2 × 1 （P05107） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 ;alpha-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 CALCIUM ION × 4 MAGNESIUM ION × 1 water × 1 Consistent with protein count
5 Other combination Heteromer Protein 8 其他Polymer 13 Integrin beta-2 × 4 （P05107） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 5 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 7 ;alpha-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 15 CALCIUM ION × 16 MAGNESIUM ION × 1 water × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1n3y 2luv 9ecm

3 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
3k6s 3k6s 3k6s 3k6s 3k6s 3k71 3k71 3k71 3k71 3k71 3k72 3k72

19 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name ITAX_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–1084； UniProt 20–1103 Author chain C； PDBConstruct 1–1084； UniProt 20–1103 Author chain E； PDBConstruct 1–1084； UniProt 20–1103 Author chain G； PDBConstruct 1–1084； UniProt 20–1103

Integrin beta-2

Homo sapiens

UniProt P05107

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Other combination Heteromer Protein 2 其他Polymer 4 Integrin alpha-X × 1 （P20702） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 3 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 CALCIUM ION × 4 Consistent with protein count
2 Other combination Heteromer Protein 2 其他Polymer 3 Integrin alpha-X × 1 （P20702） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 CALCIUM ION × 4 Consistent with protein count
3 Other combination Heteromer Protein 2 其他Polymer 3 Integrin alpha-X × 1 （P20702） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 CALCIUM ION × 4 Consistent with protein count
4 Other combination Heteromer Protein 2 其他Polymer 3 Integrin alpha-X × 1 （P20702） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 ;alpha-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 CALCIUM ION × 4 MAGNESIUM ION × 1 water × 1 Consistent with protein count
5 Other combination Heteromer Protein 8 其他Polymer 13 Integrin alpha-X × 4 （P20702） 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 5 alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 7 ;alpha-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 15 CALCIUM ION × 16 MAGNESIUM ION × 1 water × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1l3y 2p26 5e6w 5e6x 5zaz 9ecl

6 assemblies

Homodimer
1yuk 2p28

2 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
2jf1 3k6s 3k6s 3k6s 3k6s 3k6s 3k71 3k71 3k71 3k71 3k71 3k72

33 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name ITB2_HUMAN
Isoform —
PDB entities 2
Chains and sequence ranges Author chain B； PDBConstruct 1–683； UniProt 23–700 Author chain D； PDBConstruct 1–683； UniProt 23–700 Author chain F； PDBConstruct 1–683； UniProt 23–700 Author chain H； PDBConstruct 1–683； UniProt 23–700

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_id3k71
Deposition date deposition_date2009-10-11
Structure title titleStructure of integrin alphaX beta2 ectodomain
Keywords keywordsintegrin, cell adhesion, cell receptor, Pyrrolidone carboxylic acid; CELL ADHESION
Experimental Method methodX-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.

3k71__assembly_4__model_1

Assembly 4 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3k71__assembly_4__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

3k71__assembly_4__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）44.06 Å
Rg (electron density)43.83 Å
Total Rg44.03 Å
Atom count13747
Residues1755
Excluded volume243060 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3k71__assembly_1__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 3k71__assembly_2__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
3 1 3k71__assembly_3__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
4 1 3k71__assembly_4__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
5 1 3k71__assembly_5__model_1 octameric （8） 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 (9)

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6. Fold Classification (SCOP + CATH) 25 domains

CATH v4.4 (25 domains)

Domain ID domain_id3k71A01
Class class2 — Mainly Beta
Architecture architecture130 — 7 Propeller
Topology topology10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily130 — Integrin alpha, N-terminal
Domain ID domain_id3k71A02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1460 — Integrin domains. Chain A, domain 2
Domain ID domain_id3k71A03
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1510 — ntegrin, alpha v. Chain A, domain 3
Domain ID domain_id3k71A04
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1530 — ntegrin, alpha v. Chain A, domain 4
Domain ID domain_id3k71B02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1510 — ntegrin, alpha v. Chain A, domain 3
Domain ID domain_id3k71B03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily410 — von Willebrand factor, type A domain
Domain ID domain_id3k71C01
Class class2 — Mainly Beta
Architecture architecture130 — 7 Propeller
Topology topology10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily130 — Integrin alpha, N-terminal
Domain ID domain_id3k71C02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1460 — Integrin domains. Chain A, domain 2
Domain ID domain_id3k71C03
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1510 — ntegrin, alpha v. Chain A, domain 3
Domain ID domain_id3k71C04
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1530 — ntegrin, alpha v. Chain A, domain 4
Domain ID domain_id3k71D02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1510 — ntegrin, alpha v. Chain A, domain 3
Domain ID domain_id3k71D03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily410 — von Willebrand factor, type A domain
Domain ID domain_id3k71E01
Class class2 — Mainly Beta
Architecture architecture130 — 7 Propeller
Topology topology10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily130 — Integrin alpha, N-terminal
Domain ID domain_id3k71E02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1460 — Integrin domains. Chain A, domain 2
Domain ID domain_id3k71E03
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1510 — ntegrin, alpha v. Chain A, domain 3
Domain ID domain_id3k71E04
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1530 — ntegrin, alpha v. Chain A, domain 4
Domain ID domain_id3k71F02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1510 — ntegrin, alpha v. Chain A, domain 3
Domain ID domain_id3k71F03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily410 — von Willebrand factor, type A domain
Domain ID domain_id3k71G01
Class class2 — Mainly Beta
Architecture architecture130 — 7 Propeller
Topology topology10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily130 — Integrin alpha, N-terminal
Domain ID domain_id3k71G02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily410 — von Willebrand factor, type A domain
Domain ID domain_id3k71G03
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1460 — Integrin domains. Chain A, domain 2
Domain ID domain_id3k71G04
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1510 — ntegrin, alpha v. Chain A, domain 3
Domain ID domain_id3k71G05
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1530 — ntegrin, alpha v. Chain A, domain 4
Domain ID domain_id3k71H02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily1510 — ntegrin, alpha v. Chain A, domain 3
Domain ID domain_id3k71H03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily410 — von Willebrand factor, type A domain
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7. Citations (1)