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1hla

STRUCTURE OF THE HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN, HLA-A2

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

CLASS I HISTOCOMPATIBILITY ANTIGEN (HLA-A2) (ALPHA CHAIN)

Homo sapiens

UniProt P01892

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 2 BETA 2-MICROGLOBULIN × 1 （P61769） Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1akj 1ao7 1ao7 1aqd 1aqd 1aqd 1aqd 1b0g 1b0g 1b0r 1bd2 1duy

466 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name 1A02_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–270； UniProt 25–294

BETA 2-MICROGLOBULIN

Homo sapiens

UniProt P61769

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 2 CLASS I HISTOCOMPATIBILITY ANTIGEN (HLA-A2) (ALPHA CHAIN) × 1 （P01892） Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1jnj 1lds 1py4 1py4 1py4 1py4 2d4d 2d4f 2vb5 2xks 2xku 2yxf

61 assemblies; showing the first 12

Homodimer
2x89 2x89 2z9t 3low 4r9h 4r9h 4ra3 4ra3 4rah 6m1b

10 assemblies

Homotetramer
2e8d 2f8o 3tlr 3tm6 3tm6 7afv

6 assemblies

Other homooligomers
3ciq 3ciq 3loz 6gk3 8a7o 8a7p 8a7q 8a7t

8 assemblies

Heteromeric or nucleic-acid complex
1a1m 1a1n 1a1o 1a6z 1a6z 1a9b 1a9b 1a9e 1agb 1agc 1agd 1age

1914 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name B2MG_HUMAN
Isoform —
PDB entities 2
Chains and sequence ranges Author chain M； PDBConstruct 1–97； UniProt 21–117

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_id1hla
Deposition date deposition_date1987-10-15
Structure title titleSTRUCTURE OF THE HUMAN CLASS I HISTOCOMPATIBILITY ANTIGEN, HLA-A2
Keywords keywordsHISTOCOMPATIBILITY ANTIGEN; HISTOCOMPATIBILITY ANTIGEN
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.

1hla__assembly_1__model_1

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

Download this curve (.dat)

1hla__assembly_1__model_1 | I(q)

10-2 10-1 105 106 107 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1hla__assembly_1__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）23.50 Å
Rg (electron density)22.62 Å
Total Rg22.94 Å
Atom count0
Residues0
Excluded volume51227 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1hla__assembly_1__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 (2)

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6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (3 domains)

Domain ID domain_idd1hlaa1
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.1 — Immunoglobulin
Family Family familyb.1.1.2 — C1 set domains (antibody constant domain-like)
Domain ID domain_idd1hlaa2
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.19 — MHC antigen-recognition domain
Superfamily Superfamily superfamilyd.19.1 — MHC antigen-recognition domain
Family Family familyd.19.1.1 — MHC antigen-recognition domain
Domain ID domain_idd1hlam_
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.1 — Immunoglobulin
Family Family familyb.1.1.2 — C1 set domains (antibody constant domain-like)
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7. Citations (3)