1kpv

High resolution crystal structure of the MHC class I complex H-2Kb/SEV9

Method: X-RAY DIFFRACTION Dmax: 75.0 Å Quality: EXCELLENT

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

H-2 class I histocompatibility antigen, K-B alpha chain

Mus musculus

UniProt P01901

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Other combination Heteromer Protein × 3 其他Polymer 1 PDB declaration: trimeric(3) Consistent with protein copy count Chain A; UniProt 22–295 Fragment:extracellular domain, sequence database residues 22-295, numbered 1-274 beta-2-microglobulin × 1 (P01887) Nucleocapsid protein × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose × 1 PO4 PHOSPHATE ION × 2 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 3 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;295 K;K/NA PHOSPHATE, MPD, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 295K Resolution 1.71 Å R-free 0.204
2 Other combination Heteromer Protein × 6 其他Polymer 2 PDB declaration: hexameric(6) Consistent with protein copy count Chain A; UniProt 22–295 Fragment:extracellular domain, sequence database residues 22-295, numbered 1-274 beta-2-microglobulin × 2 (P01887) Nucleocapsid protein × 2 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose × 2 PO4 PHOSPHATE ION × 4 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 6 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;295 K;K/NA PHOSPHATE, MPD, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 295K Resolution 1.71 Å R-free 0.204

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.

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

View Construct and Data Evidence
UniProt name HA1B_MOUSE
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–274; UniProt 22–295

beta-2-microglobulin

Mus musculus

UniProt P01887

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Other combination Heteromer Protein × 3 其他Polymer 1 PDB declaration: trimeric(3) Consistent with protein copy count Chain B; UniProt 21–119 Fragment:sequence database residues 21-119, numbered 1-99 H-2 class I histocompatibility antigen, K-B alpha chain × 1 (P01901) Nucleocapsid protein × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose × 1 PO4 PHOSPHATE ION × 2 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 3 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;295 K;K/NA PHOSPHATE, MPD, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 295K Resolution 1.71 Å R-free 0.204
2 Other combination Heteromer Protein × 6 其他Polymer 2 PDB declaration: hexameric(6) Consistent with protein copy count Chain B; UniProt 21–119 Fragment:sequence database residues 21-119, numbered 1-99 H-2 class I histocompatibility antigen, K-B alpha chain × 2 (P01901) Nucleocapsid protein × 2 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose × 2 PO4 PHOSPHATE ION × 4 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 6 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;295 K;K/NA PHOSPHATE, MPD, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 295K Resolution 1.71 Å R-free 0.204

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.

290 other PDB entries and 482 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name B2MG_MOUSE
Isoform
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 1–99; UniProt 21–119

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 1kpv

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id1kpv
Deposition date deposition_date2002-01-02
Structure title titleHigh resolution crystal structure of the MHC class I complex H-2Kb/SEV9
Keywords keywordsMAJOR HISTOCOMPATIBILITY COMPLEX, PEPTIDE-MHC, 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_guinier23.81
Radius of gyration Rg (electron density) rg_electron22.83
Forward intensity I(0) i035905700.00
Molecular weight molecular_weight45208.0 kDa
Excluded volume excluded_volume56133 ų
Envelope volume envelope_volume68609 ų
Hydration-shell volume shell_volume25018 ų
Envelope diameter envelope_diameter77.3
Shell Rg shell_rg29.82
Envelope Rg envelope_rg23.06
Shape Rg shape_rg22.81
Total Rg total_rg23.74
Total atoms total_atoms3184
Residues n_residues381
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 dmax75.0
Rg (real space) rg_real23.73
Rg uncertainty (real space) rg_real_error0.37
I(0) (real space) i0_real3.5910e+07
I(0) uncertainty (real space) i0_real_error4.7280e+05
Rg (reciprocal space) rg_reciprocal23.75
I(0) (reciprocal space) i0_reciprocal35910000.0000
Solution quality estimate total_estimate0.9067
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary29.3
Skewness Skewness skewness0.242
Kurtosis Kurtosis kurtosis-0.450
Angular range angular_range— – 0.3350 −1
Current regularization parameter α current_alpha0.0001
Highest regularization parameter α highest_alpha10080000.0000
Real-space data points n_real_points65
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.932; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 1.000; Smooth: 0.988

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (7)

7. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_idd1kpva1
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_idd1kpva2
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_idd1kpvb_
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)

CATH v4.4 (3 domains)

Domain ID domain_id1kpvA01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology500 — Murine Class I Major Histocompatibility Complex, H2-DB; Chain A, domain 1
Homologous superfamily homologous superfamily10 — MHC class I-like antigen recognition-like
Domain ID domain_id1kpvA02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id1kpvB00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins

8. Citations (2)

9. Files and Curves (10)