7K0Z image
Entry Detail
PDB ID:
7K0Z
Keywords:
Title:
Marsupial T cell receptor Spl_157
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2020-09-06
Release Date:
2021-03-24
Method Details:
Experimental Method:
Resolution:
3.20 Å
R-Value Free:
0.28
R-Value Work:
0.25
R-Value Observed:
0.25
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:T cell receptor mu chain
Chain IDs:A (auth: C), C (auth: A)
Chain Length:349
Number of Molecules:2
Biological Source:Monodelphis domestica
Polymer Type:polypeptide(L)
Description:T cell receptor gamma chain
Chain IDs:B (auth: D), D (auth: B)
Chain Length:236
Number of Molecules:2
Biological Source:Monodelphis domestica
Ligand Molecules
Primary Citation
The molecular assembly of the marsupial gamma mu T cell receptor defines a third T cell lineage.
Science 371 1383 1388 (2021)
PMID: 33766885 DOI: 10.1126/science.abe7070

Abstact

αβ and γδ T cell receptors (TCRs) are highly diverse antigen receptors that define two evolutionarily conserved T cell lineages. We describe a population of γμTCRs found exclusively in non-eutherian mammals that consist of a two-domain (Vγ-Cγ) γ-chain paired to a three-domain (Vμ-Vμj-Cμ) μ-chain. γμTCRs were characterized by restricted diversity in the Vγ and Vμj domains and a highly diverse unpaired Vμ domain. Crystal structures of two distinct γμTCRs revealed the structural basis of the association of the γμTCR heterodimer. The Vμ domain shared the characteristics of a single-domain antibody within which the hypervariable CDR3μ loop suggests a major antigen recognition determinant. We define here the molecular basis underpinning the assembly of a third TCR lineage, the γμTCR.

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Primary Citation of related structures