SAXSdb — 9hi7

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

Major histocompatibility complex class I-related gene protein

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	Beta-2-microglobulin × 1 （P61769） T cell receptor alpha chain MC.7.G5 × 1 （P0DTU3） T cell receptor beta chain MC.7.G5 × 1 （P0DTU4） water × 1	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 4	Beta-2-microglobulin × 1 （P61769） T cell receptor alpha chain MC.7.G5 × 1 （P0DTU3） T cell receptor beta chain MC.7.G5 × 1 （P0DTU4） water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	HMR1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–271； UniProt 23–292 Author chain F； PDBConstruct 2–271； UniProt 23–292

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 4	Major histocompatibility complex class I-related gene protein × 1 （Q95460） T cell receptor alpha chain MC.7.G5 × 1 （P0DTU3） T cell receptor beta chain MC.7.G5 × 1 （P0DTU4） water × 1	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 4	Major histocompatibility complex class I-related gene protein × 1 （Q95460） T cell receptor alpha chain MC.7.G5 × 1 （P0DTU3） T cell receptor beta chain MC.7.G5 × 1 （P0DTU4） water × 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 G； PDBConstruct 2–100； UniProt 21–119

T cell receptor alpha chain MC.7.G5

Homo sapiens

UniProt P0DTU3

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	Major histocompatibility complex class I-related gene protein × 1 （Q95460） Beta-2-microglobulin × 1 （P61769） T cell receptor beta chain MC.7.G5 × 1 （P0DTU4） water × 1	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 4	Major histocompatibility complex class I-related gene protein × 1 （Q95460） Beta-2-microglobulin × 1 （P61769） T cell receptor beta chain MC.7.G5 × 1 （P0DTU4） water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TRAR2_HUMAN
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain D； PDBConstruct 1–201； UniProt 20–220 Author chain H； PDBConstruct 1–201； UniProt 20–220

T cell receptor beta chain MC.7.G5

Homo sapiens

UniProt P0DTU4

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	Major histocompatibility complex class I-related gene protein × 1 （Q95460） Beta-2-microglobulin × 1 （P61769） T cell receptor alpha chain MC.7.G5 × 1 （P0DTU3） water × 1	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 4	Major histocompatibility complex class I-related gene protein × 1 （Q95460） Beta-2-microglobulin × 1 （P61769） T cell receptor alpha chain MC.7.G5 × 1 （P0DTU3） water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TRBR2_HUMAN
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain E； PDBConstruct 1–248； UniProt 19–266 Author chain I； PDBConstruct 1–248； UniProt 19–266

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	9hi7
Deposition date deposition_date	2024-11-24
Last revision last_revision	2025-04-23
Structure title title	Structure of MC.7.G5 T cell receptor in complex with MR1 R9H
Keywords keywords	TCR, MR1, MAIT, 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.

9hi7__assembly_1__model_1

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

Download this curve (.dat)

9hi7__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9hi7__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	37.04 Å
Rg (electron density)	37.34 Å
Total Rg	37.54 Å
Atom count	6483
Residues	799
Excluded volume	114050 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9hi7__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`9hi7__assembly_2__model_1`	tetrameric （4）	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	Major histocompatibility complex class I-related gene protein
Molecular weight formula_weight	33763.8 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,F
Atom count atom_count	13002

MRTHSLRYFHLGVSDPIHGVPEFISVGYVDSHPITTYDSVTRQKEPRAPWMAENLAPDHWERYTQLLRGWQQMFKVELKRLQRHYNHSGSHTYQRMIGCELLEDGSTTGFLQYAYDGQDFLIFNKDTLSWLAVDNVAHTIKQAWEANQHELLYQKNWLEEECIAWLKRFLEYGKDTLQRTEPPLVRVNRKETFPGVTALFCKAHGFYPPEIYMTWMKNGEEIVQEIDYGDILPSGDGTYQAWASIELDPQSSNLYSCHVEHSGVHMVLQVPGSGGGLNDIFEAQKIEWHE

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	2

Polymer Polymer

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

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	T cell receptor alpha chain MC.7.G5
Molecular weight formula_weight	22690.2 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,H

MAQTVTQSQPEMSVQEAETVTLSCTYDTSESDYYLFWYKQPPSRQMILVIRQEAYKQQNATENRFSVNFQKAAKSFSLKISDSQLGDAAMYFCAYRSAVNARLMFGDGTQLVVKPNIQNPDPAVYQLRDSKSSDKSVCLFTDFDSQTNVSQSKDSDVYITDKCVLDMRSMDFKSNSAVAWSNKSDFACANAFNNSIIPEDT

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 4 Entity 4 polymer

Description description	T cell receptor beta chain MC.7.G5
Molecular weight formula_weight	28176.3 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

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

MEADIYQTPRYLVIGTGKKITLECSQTMGHDKMYWYQQDPGMELHLIHYSYGVNSTEKGDLSSESTVSRIRTEHFPLTLESARPSHTSQYLCASSEARGLAEFTDTQYFGPGTRLTVLEDLKNVFPPEVAVFEPSEAEISHTQKATLVCLATGFYPDHVELSWWVNGKEVHSGVCTDPQPLKEQPALNDSRYALSSRLRVSATFWQDPRNHFRCQVQFYGLSENDEWTQDRAKPVTQIVSAEAWGRAD

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 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	2

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Unit-cell length a length_a	72.030 Å
Unit-cell length b length_b	113.202 Å
Unit-cell length c length_c	130.363 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.73 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.810 Å
Low-resolution limit resolution_low	130.350 Å
R factor r_factor	0.2386
R_work r_work	0.2358
R_free r_free	0.2958

Structure of MC.7.G5 T cell receptor in complex with MR1 R9H

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

Major histocompatibility complex class I-related gene protein

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

T cell receptor alpha chain MC.7.G5

State in the Current Structure

Other States of the Same Protein in the Database

T cell receptor beta chain MC.7.G5

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

9hi7__assembly_1__model_1

9hi7__assembly_1__model_1 | I(q)

9hi7__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

Source Source

Entity 4 Entity 4 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 water

7. Citations (1)

Structure of MC.7.G5 T cell receptor in complex with MR1 R9H

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

Major histocompatibility complex class I-related gene protein

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

T cell receptor alpha chain MC.7.G5

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

T cell receptor beta chain MC.7.G5

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

9hi7__assembly_1__model_1

9hi7__assembly_1__model_1 | I(q)

9hi7__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

Source Source

Entity 4 Entity 4 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 water

7. Citations (1)