1r5i

Crystal structure of the MAM-MHC complex

Method: X-RAY DIFFRACTION Dmax: 144.0 Å Quality: GOOD

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

HLA class II histocompatibility antigen, DR alpha chain

Homo sapiens

UniProt P01903

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 26–206 Fragment:alpha chain of class II MHC (residues 26-206) Non-standard monomer:Yes (specific site not provided by mmCIF) HLA class II histocompatibility antigen, DRB1-1 beta chain × 1 (P04229) Hemagglutinin peptide × 1 (P11133) superantigen × 1 (Q48898) PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;298 K;potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.60 Å R-free 0.246
2 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain E; UniProt 26–206 Fragment:alpha chain of class II MHC (residues 26-206) Non-standard monomer:Yes (specific site not provided by mmCIF) HLA class II histocompatibility antigen, DRB1-1 beta chain × 1 (P04229) Hemagglutinin peptide × 1 (P11133) superantigen × 1 (Q48898) PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;298 K;potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.60 Å R-free 0.246

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

139 other PDB entries and 218 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name 2DRA_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–181; UniProt 26–206 Author chain E; PDBConstruct 1–181; UniProt 26–206

HLA class II histocompatibility antigen, DRB1-1 beta chain

Homo sapiens

UniProt P04229

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain B; UniProt 30–219 Fragment:beta chain of class II MHC (residues 30-219) HLA class II histocompatibility antigen, DR alpha chain × 1 (P01903) Hemagglutinin peptide × 1 (P11133) superantigen × 1 (Q48898) PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;298 K;potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.60 Å R-free 0.246
2 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain F; UniProt 30–219 Fragment:beta chain of class II MHC (residues 30-219) HLA class II histocompatibility antigen, DR alpha chain × 1 (P01903) Hemagglutinin peptide × 1 (P11133) superantigen × 1 (Q48898) PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;298 K;potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.60 Å R-free 0.246

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

48 other PDB entries and 82 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name 2B11_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 1–190; UniProt 30–219 Author chain F; PDBConstruct 1–190; UniProt 30–219

Hemagglutinin peptide

OrganismNot specified

UniProt P11133

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain C; UniProt 306–318 Fragment:haemagglutinin peptide (residues 306-318) HLA class II histocompatibility antigen, DR alpha chain × 1 (P01903) HLA class II histocompatibility antigen, DRB1-1 beta chain × 1 (P04229) superantigen × 1 (Q48898) PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;298 K;potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.60 Å R-free 0.246
2 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain G; UniProt 306–318 Fragment:haemagglutinin peptide (residues 306-318) HLA class II histocompatibility antigen, DR alpha chain × 1 (P01903) HLA class II histocompatibility antigen, DRB1-1 beta chain × 1 (P04229) superantigen × 1 (Q48898) PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;298 K;potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.60 Å R-free 0.246

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

1 other PDB entries and 1 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name HEMA_IAZH2
Isoform
PDB entities 3
Chains and sequence ranges Author chain C; PDBConstruct 1–13; UniProt 306–318 Author chain G; PDBConstruct 1–13; UniProt 306–318

superantigen

Mycoplasma arthritidis

UniProt Q48898

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain D; UniProt 23–238 Not recorded HLA class II histocompatibility antigen, DR alpha chain × 1 (P01903) HLA class II histocompatibility antigen, DRB1-1 beta chain × 1 (P04229) Hemagglutinin peptide × 1 (P11133) PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;298 K;potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.60 Å R-free 0.246
2 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain H; UniProt 23–238 Not recorded HLA class II histocompatibility antigen, DR alpha chain × 1 (P01903) HLA class II histocompatibility antigen, DRB1-1 beta chain × 1 (P04229) Hemagglutinin peptide × 1 (P11133) PO4 PHOSPHATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;298 K;potassium sodium hosphate, HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.60 Å R-free 0.246

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

4 other PDB entries and 7 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name Q48898_MYCAT
Isoform
PDB entities 4
Chains and sequence ranges Author chain D; PDBConstruct 4–216; UniProt 23–238 Author chain H; PDBConstruct 4–216; UniProt 23–238

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.

SAXS scattering curve SAXS Profile

SAXS profile for 1r5i

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1r5i
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1r5i
Deposition date deposition_date2003-10-10
Structure title titleCrystal structure of the MAM-MHC complex
Keywords keywordssuperantigen, MHC, MAM, complex, IMMUNE SYSTEM; IMMUNE SYSTEM
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier43.99
Radius of gyration Rg (electron density) rg_electron43.59
Forward intensity I(0) i0285799000.00
Molecular weight molecular_weight140590.0 kDa
Excluded volume excluded_volume176450 ų
Envelope volume envelope_volume254160 ų
Hydration-shell volume shell_volume48784 ų
Envelope diameter envelope_diameter143.3
Shell Rg shell_rg48.90
Envelope Rg envelope_rg42.52
Shape Rg shape_rg43.59
Total Rg total_rg43.84
Total atoms total_atoms9908
Residues n_residues1190
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax144.0
Rg (real space) rg_real44.05
Rg uncertainty (real space) rg_real_error1.35
I(0) (real space) i0_real2.8580e+08
I(0) uncertainty (real space) i0_real_error5.1260e+06
Rg (reciprocal space) rg_reciprocal43.99
I(0) (reciprocal space) i0_reciprocal285800000.0000
Solution quality estimate total_estimate0.8143
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary36.0
Skewness Skewness skewness0.209
Kurtosis Kurtosis kurtosis-0.802
Angular range angular_range— – 0.1800 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha24600000.0000
Real-space data points n_real_points37
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.892; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.906; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

7. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (12 domains)

Domain ID domain_idd1r5ia1
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_idd1r5ia2
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_idd1r5ib1
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_idd1r5ib2
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_idd1r5id1
Class classa — All alpha proteins
Fold Fold folda.202 — Superantigen MAM
Superfamily Superfamily superfamilya.202.1 — Superantigen MAM
Family Family familya.202.1.1 — Superantigen MAM
Domain ID domain_idd1r5id2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags
Domain ID domain_idd1r5ie1
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_idd1r5ie2
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_idd1r5if1
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_idd1r5if2
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_idd1r5ih1
Class classa — All alpha proteins
Fold Fold folda.202 — Superantigen MAM
Superfamily Superfamily superfamilya.202.1 — Superantigen MAM
Family Family familya.202.1.1 — Superantigen MAM
Domain ID domain_idd1r5ih2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags

CATH v4.4 (12 domains)

Domain ID domain_id1r5iA01
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology320 — Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Homologous superfamily homologous superfamily10 — Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Domain ID domain_id1r5iA02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id1r5iB01
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology320 — Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Homologous superfamily homologous superfamily10 — Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Domain ID domain_id1r5iB02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id1r5iD01
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily390 — Hla class ii histocompatibility antigen, dr alpha chain. Chain D, domain 1
Domain ID domain_id1r5iD02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily530 — mam-mhc complex, Chain D, Domain 2
Domain ID domain_id1r5iE01
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology320 — Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Homologous superfamily homologous superfamily10 — Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Domain ID domain_id1r5iE02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id1r5iF01
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology320 — Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Homologous superfamily homologous superfamily10 — Class II Histocompatibility Antigen, M Beta Chain; Chain B, domain 1
Domain ID domain_id1r5iF02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id1r5iH01
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily390 — Hla class ii histocompatibility antigen, dr alpha chain. Chain D, domain 1
Domain ID domain_id1r5iH02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily530 — mam-mhc complex, Chain D, Domain 2

8. Citations (1)

9. Files and Curves (10)