SAXSdb — 9k2r

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

MHC class I antigen

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 5	Beta-2-microglobulin × 1 （P61769） peptide from p51 RT × 1 （P12499） T cell receptor alpha chain × 1 T cell receptor beta chain × 1	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 5	Beta-2-microglobulin × 1 （P61769） peptide from p51 RT × 1 （P12499） T cell receptor alpha chain × 1 T cell receptor beta chain × 1	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 5	Beta-2-microglobulin × 1 （P61769） peptide from p51 RT × 1 （P12499） T cell receptor alpha chain × 1 T cell receptor beta chain × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A165EYK7_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–275； UniProt 26–300 Author chain D； PDBConstruct 1–275； UniProt 26–300 Author chain G； PDBConstruct 1–275； UniProt 26–300

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 5	MHC class I antigen × 1 （A0A165EYK7） peptide from p51 RT × 1 （P12499） T cell receptor alpha chain × 1 T cell receptor beta chain × 1	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 5	MHC class I antigen × 1 （A0A165EYK7） peptide from p51 RT × 1 （P12499） T cell receptor alpha chain × 1 T cell receptor beta chain × 1	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 5	MHC class I antigen × 1 （A0A165EYK7） peptide from p51 RT × 1 （P12499） T cell receptor alpha chain × 1 T cell receptor beta chain × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	B2MG_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 2–100； UniProt 21–119 Author chain E； PDBConstruct 2–100； UniProt 21–119 Author chain H； PDBConstruct 2–100； UniProt 21–119

peptide from p51 RT

OrganismNot specified

UniProt P12499

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 5	MHC class I antigen × 1 （A0A165EYK7） Beta-2-microglobulin × 1 （P61769） T cell receptor alpha chain × 1 T cell receptor beta chain × 1	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 5	MHC class I antigen × 1 （A0A165EYK7） Beta-2-microglobulin × 1 （P61769） T cell receptor alpha chain × 1 T cell receptor beta chain × 1	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 5	MHC class I antigen × 1 （A0A165EYK7） Beta-2-microglobulin × 1 （P61769） T cell receptor alpha chain × 1 T cell receptor beta chain × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	POL_HV1Z2
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–11； UniProt 897–907 Author chain F； PDBConstruct 1–11； UniProt 897–907 Author chain I； PDBConstruct 1–11； UniProt 897–907

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	9k2r
Deposition date deposition_date	2024-10-18
Last revision last_revision	2025-09-17
Structure title title	Human T cell receptor (TRAV2401/TRBV2701) in complex with HLA-C*1202 and IY11 peptide
Keywords keywords	CD8+ T cells, HIV-1, escape mutant, KIR2DL2, TCR, HLA, 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.

9k2r__assembly_1__model_1

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

Download this curve (.dat)

9k2r__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9k2r__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	38.71 Å
Rg (electron density)	39.11 Å
Total Rg	39.15 Å
Atom count	6662
Residues	822
Excluded volume	116830 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9k2r__assembly_1__model_1`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`9k2r__assembly_2__model_1`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`9k2r__assembly_3__model_1`	pentameric （5）	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 (5)

Entity 1 Entity 1 polymer

Description description	MHC class I antigen
Molecular weight formula_weight	31901.0 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,D,G
Atom count atom_count	19680

SHSMRYFYTAVSRPGRGEPRFIAVGYVDDTQFVRFDSDAASPRGEPRAPWVEQEGPEYWDRETQKYKRQAQADRVSLRNLRGYYNQSEAGSHTLQRMYGCDLGPDGRLLRGYDQSAYDGKDYIALNEDLRSWTAADTAAQITQRKWEAAREAEQWRAYLEGTCVEWLRRYLENGKETLQRAEHPKTHVTHHPVSDHEATLRCWALGFYPAEITLTWQRDGEDQTQDTELVETRPAGDGTFQKWAAVVVPSGEEQRYTCHVQHEGLPEPLTLRWEP

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Beta-2-microglobulin
Molecular weight formula_weight	11879.4 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

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

MIQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKDWSFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 3 Entity 3 polymer

Description description	peptide from p51 RT
Molecular weight formula_weight	1319.5 kDa
Source method src_method	syn
Copy count entity_count	3

Polymer Polymer

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

ILKEPVHGVYY

Entity 4 Entity 4 polymer

Description description	T cell receptor alpha chain
Molecular weight formula_weight	23001.5 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	J,L,N

ILNVEQSPQSLHVQEGDSTNFTCSFPSSNFYALHWYRWETAKSPEALFVMTLNGDEKKKGRISATLNTKEGYSYLYIKGSQPEDSATYLCYVPMDSNYQLIWGAGTKLIIKPDIQNPDPAVYQLRDSKSSDKSVCLFTDFDSQTNVSQSKDSDVYITDKCVLDMRSMDFKSNSAVAWSNKSDFACANAFNNSIIPEDTFFPSPE

Source Source

Source organism organism	Homo sapiens
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 5 Entity 5 polymer

Description description	T cell receptor beta chain
Molecular weight formula_weight	27375.6 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	K,M,O

QVTQNPRYLITVTGKKLTVTCSQNMNHEYMSWYRQDPGLGLRQIYYSMNVEVTDKGDVPEGYKVSRKEKRNFPLILESPSPNQTSLYFCASSLVGAGQPQHFGDGTRLSILEDLNKVFPPEVAVFEPSEAEISHTQKATLVCLATGFFPDHVELSWWVNGKEVHSGVCTDPQPLKEQPALNDSRYALSSRLRVSATFWQNPRNHFRCQVQFYGLSENDEWTQDRAKPVTQIVSAEAWGRAD

Source Source

Source organism organism	Homo sapiens
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

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Unit-cell length a length_a	207.827 Å
Unit-cell length b length_b	344.872 Å
Unit-cell length c length_c	134.270 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	24

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	orthorhombic

Resolution resolution	2.980 Å
Low-resolution limit resolution_low	44.500 Å
R factor r_factor	0.2085
R_work r_work	0.2074
R_free r_free	0.2329

Human T cell receptor (TRAV2401/TRBV2701) in complex with HLA-C*1202 and IY11 peptide

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

MHC class I antigen

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

peptide from p51 RT

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

9k2r__assembly_1__model_1

9k2r__assembly_1__model_1 | I(q)

9k2r__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 (5)

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 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 polymer

Polymer Polymer

Source Source

7. Citations (1)

Human T cell receptor (TRAV24*01/TRBV27*01) in complex with HLA-C*1202 and IY11 peptide

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

MHC class I antigen

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

peptide from p51 RT

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

9k2r__assembly_1__model_1

9k2r__assembly_1__model_1 | I(q)

9k2r__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 (5)

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 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 polymer

Polymer Polymer

Source Source

7. Citations (1)

Human T cell receptor (TRAV2401/TRBV2701) in complex with HLA-C*1202 and IY11 peptide