SAXSdb — 8y74

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

MHC class I alpha chain 2

Gallus gallus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	Beta-2-microglobulin × 2 （P21611） Polymerase basic protein 2 × 2 （A0A023PU38） water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	O46789_CHICK
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–272； UniProt 22–292 Author chain D； PDBConstruct 2–272； UniProt 22–292

Beta-2-microglobulin

Gallus gallus

UniProt P21611

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	MHC class I alpha chain 2 × 2 （O46789） Polymerase basic protein 2 × 2 （A0A023PU38） water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	B2MG_CHICK
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 2–99； UniProt 22–119 Author chain E； PDBConstruct 2–99； UniProt 22–119

Polymerase basic protein 2

OrganismNot specified

UniProt A0A023PU38

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	MHC class I alpha chain 2 × 2 （O46789） Beta-2-microglobulin × 2 （P21611） water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A023PU38_9INFA
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–9； UniProt 552–560 Author chain F； PDBConstruct 1–9； UniProt 552–560

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	8y74
Deposition date deposition_date	2024-02-03
Structure title title	Crystal structure of 9-mer peptide from H9N2 avian influenza virus in complex with BF2*0201
Keywords keywords	chicken MHC, T cell recognition, IMMUNE SYSTEM; IMMUNE SYSTEM
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.

8y74__assembly_1__model_1

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

Download this curve (.dat)

8y74__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

8y74__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	32.50 Å
Rg (electron density)	31.67 Å
Total Rg	32.31 Å
Atom count	6091
Residues	754
Excluded volume	106960 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`8y74__assembly_1__model_1`	hexameric （6）	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	MHC class I alpha chain 2
Molecular weight formula_weight	31095.6 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,D
Atom count atom_count	6342

MELHTLRYIRTAMTDPGPGLPWYVDVGYVDGELFVHYNSTARRYVPRTEWIAAKADQQYWDGQTQIGQGNEQIDRENLGILQRRYNQTGGSHTVQWMYGCDILEGGPIRGYYQMAYDGRDFTAFDKGTMTFTAAVPEAVPTKRKWEEGDYAEGLKQYLEETCVEWLRRYVEYGKAELGRRERPEVRVWGKEADGILTLSCRAHGFYPRPIVVSWLKDGAVRGQDAHSGGIVPNGDGTYHTWVTIDAQPGDGDKYQCRVEHASLPQPGLYSWE

Source Source

Source organism organism	Gallus gallus
Common name common_name	chicken
NCBI taxonomy ID ncbi_taxonomy_id	9031
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 polymer

Description description	Beta-2-microglobulin
Molecular weight formula_weight	11193.6 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,E

MDLTPKVQVYSRFPASAGTKNVLNCFAAGFHPPKISITLMKDGVPMEGAQYSDMSFNDDWTFQRLVHADFTPSSGSTYACKVEHETLKEPQVYKWDPEF

Source Source

Source organism organism	Gallus gallus
Common name common_name	chicken
NCBI taxonomy ID ncbi_taxonomy_id	9031
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 3 Entity 3 polymer

Description description	Polymerase basic protein 2
Molecular weight formula_weight	1217.4 kDa
Source method src_method	syn
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,F

WIIRNWETV

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	251

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Unit-cell length a length_a	125.782 Å
Unit-cell length b length_b	76.553 Å
Unit-cell length c length_c	87.143 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	92.45 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	1.900 Å
Low-resolution limit resolution_low	43.532 Å
R factor r_factor	—
R_work r_work	0.2039
R_free r_free	0.2402

Crystal structure of 9-mer peptide from H9N2 avian influenza virus in complex with BF2*0201

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

MHC class I alpha chain 2

State in the Current Structure

Other States of the Same Protein in the Database

Beta-2-microglobulin

State in the Current Structure

Other States of the Same Protein in the Database

Polymerase basic protein 2

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

8y74__assembly_1__model_1

8y74__assembly_1__model_1 | I(q)

8y74__assembly_1__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 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 water

7. Citations (1)

Crystal structure of 9-mer peptide from H9N2 avian influenza virus in complex with BF2*0201

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

MHC class I alpha chain 2

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Beta-2-microglobulin

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Polymerase basic protein 2

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

8y74__assembly_1__model_1

8y74__assembly_1__model_1 | I(q)

8y74__assembly_1__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 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 water

7. Citations (1)