1QSF

HLA-A*02:01 presenting "LLFGYPVAV" to Alpha/Beta T cell receptor at 2.80Å resolution

Data provenance

Structure downloaded from PDB Europe using the Coordinate Server. Aligned to residues 1-180 of 1HHK2 using the CEALIGN3 function of PyMol4. Chain assigment using a Levenshtein distance5 method using data from the PDBe REST API6. Organism data from PDBe REST API. Data for both of these operations from the Molecules endpoint. Structure visualised with 3DMol7.

Complex type

Class i with peptide and alpha beta tcr

1. Beta 2 microglobulin

['B']

2. Class I alpha
HLA-A*02:01

['A']

3. Peptide
LLFGYPVAV

['C']

4. T cell receptor alpha
TRAV12

['D']

5. T cell receptor beta
TRBV6

['E']

Information on this structure on STCRdab.

Species

Homo sapiens (Human)

Locus / Allele group

HLA-A / HLA-A*02

Publication

Four A6-TCR/peptide/HLA-A2 structures that generate very different T cell signals are nearly identical.

Ding YH, Baker BM, Garboczi DN, Biddison WE, Wiley DC

Immunity (1999) 11, 45-56 [doi:10.1016/s1074-7613(00)80080-1] [pubmed:10435578]

The interactions of three singly substituted peptide variants of the HTLV-1 Tax peptide bound to HLA-A2 with the A6 T cell receptor have been studied using T cell assays, kinetic and thermodynamic measurements, and X-ray crystallography. The three peptide/MHC ligands include weak agonists and antagonists with different affinities for TCR. The three-dimensional structures of the three A6-TCR/peptide/HLA-A2 complexes are remarkably similar to each other and to the wild-type agonist complex, with minor adjustments at the interface to accommodate the peptide substitutions (P6A, V7R, and Y8A). The lack of correlation between structural changes and the type of T cell signals induced provides direct evidence that different signals are not generated by different ligand-induced conformational changes in the alphabeta TCR.

Structure deposition and release

Deposited: 1999-06-21

Released: 1999-12-21

Revised: 2021-11-03

Data provenance

Publication data retrieved from PDBe REST API8 and PMCe REST API9

Other structures from this publication

Peptide details

Length: Nonamer (9 amino acids)

Sequence: LLFGYPVAV

Interactive view

Cutaway side view (static)

Surface top view (static - coloured by atom property)

Cutaway top view (static)

Data provenance

MHC:peptide complexes are visualised using PyMol. The peptide is superimposed on a consistent cutaway slice of the MHC binding cleft (displayed as a grey mesh) which best indicates the binding pockets for the P1/P5/PC positions (side view - pockets A, E, F) and for the P2/P3/PC-2 positions (top view - pockets B, C, D). In some cases peptides will use a different pocket for a specific peptide position (atypical anchoring). On some structures the peptide may appear to sterically clash with a pocket. This is an artefact of picking a standardised slice of the cleft and overlaying the peptide.

Peptide neighbours

P1 LEU

TRP167

LYS66

MET5

TYR171

TYR159

TYR7

THR163

TYR59

GLU63

P2 LEU

VAL67

PHE9

TYR99

TYR159

TYR7

HIS70

LYS66

MET45

GLU63

P3 PHE

LEU156

GLN155

TYR99

TYR159

HIS70

LYS66

P4 GLY

LYS66

TYR159

P5 TYR

VAL152

GLN155

P6 PRO

ALA69

ARG97

THR73

HIS70

P7 VAL

TRP147

ALA150

THR73

ASP77

VAL152

ARG97

P8 ALA

VAL76

THR73

ASP77

THR143

LYS146

TRP147

P9 VAL

TYR116

LEU81

TRP147

ASP77

THR143

LYS146

TYR123

TYR84

THR142

THR80

Colour key

Aromatic Hydrophobic Acidic Basic Neutral/polar

Data provenance

Neighbours are calculated by finding residues with atoms within 5Å of each other using BioPython Neighboursearch module. The list of neighbours is then sorted and filtered to inlcude only neighbours where between the peptide and the MHC Class I alpha chain.

Colours selected to match the YRB scheme. [https://www.frontiersin.org/articles/10.3389/fmolb.2015.00056/full]

Binding cleft pockets

Peptide sidechain binding pockets (static)

Peptide terminii and backbone binding residues (static)

A Pocket

TYR159

THR163

TRP167

TYR171

MET5

TYR59

GLU63

LYS66

TYR7

B Pocket

ALA24

VAL34

MET45

GLU63

LYS66

VAL67

TYR7

HIS70

PHE9

TYR99

C Pocket

HIS70

THR73

HIS74

PHE9

ARG97

D Pocket

HIS114

GLN155

LEU156

TYR159

LEU160

TYR99

E Pocket

HIS114

TRP147

VAL152

LEU156

ARG97

F Pocket

TYR116

TYR123

THR143

LYS146

TRP147

ASP77

THR80

LEU81

TYR84

VAL95

Colour key

Binds N-terminus Binds P1 backbone Binds P2 backbone Binds PC-1 backbone Binds C-terminus

Data provenance

N-/C-terminus and peptide backbone binding residues are assigned according to previously published information and pockets are assigned according to an adaptation of a previously published set of residues. All numbering is currently that of the 'canonical' structures of human and mouse MHC Class I molecules.

Chain sequences

1. Beta 2 microglobulin Beta 2 microglobulin	10 20 30 40 50 60 MIQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKD 70 80 90 WSFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM

2. Class I alpha HLA-A02:01 IPD-IMGT/HLA* [ipd-imgt:HLA35266]	10 20 30 40 50 60 GSHSMRYFFTSVSRPGRGEPRFIAVGYVDDTQFVRFDSDAASQRMEPRAPWIEQEGPEYW 70 80 90 100 110 120 DGETRKVKAHSQTHRVDLGTLRGYYNQSEAGSHTVQRMYGCDVGSDWRFLRGYHQYAYDG 130 140 150 160 170 180 KDYIALKEDLRSWTAADMAAQTTKHKWEAAHVAEQLRAYLEGTCVEWLRRYLENGKETLQ 190 200 210 220 230 240 RTDAPKTHMTHHAVSDHEATLRCWALSFYPAEITLTWQADGEDQTQDTELVETRPAGDGT 250 260 270 FQKWAAVVVPSGQEQRYTCHVQHEGLPKPLTLRW

3. Peptide	LLFGYPVAV

4. T cell receptor alpha T cell receptor alpha TRAV12	10 20 30 40 50 60 KEVEQNSGPLSVPEGAIASLNCTYSDRGSQSFFWYRQYSGKSPELIMSIYSNGDKEDGRF 70 80 90 100 110 120 TAQLNKASQYVSLLIRDSQPSDSATYLCAVTTDSWGKLQFGAGTQVVVTPDIQNPDPAVY 130 140 150 160 170 180 QLRDSKSSDKSVCLFTDFDSQTNVSQSKDSDVYITDKTVLDMRSMDFKSNSAVAWSNKSD 190 FACANAFNNSIIPEDTFFPS

5. T cell receptor beta T cell receptor beta TRBV6	10 20 30 40 50 60 GVTQTPKFQVLKTGQSMTLQCAQDMNHEYMSWYRQDPGMGLRLIHYSVGAGITDQGEVPN 70 80 90 100 110 120 GYNVSRSTTEDFPLRLLSAAPSQTSVYFCASRPGLAGGRPEQYFGPGTRLTVTEDLKNVF 130 140 150 160 170 180 PPEVAVFEPSEAEISHTQKATLVCLATGFYPDHVELSWWVNGKEVHSGVSTDPQPLKEQP 190 200 210 220 230 240 ALNDSRYALSSRLRVSATFWQNPRNHFRCQVQFYGLSENDEWAQDRAKPVTQIVSAEAWG RAD

Data provenance

Sequences are retrieved via the Uniprot method of the RSCB REST API. Sequences are then compared to those derived from the PDB file and matched against sequences retrieved from the IPD-IMGT/HLA database for human sequences, or the IPD-MHC database for other species. Mouse sequences are matched against FASTA files from Uniprot. Sequences for the mature extracellular protein (signal petide and cytoplasmic tail removed) are compared to identical length sequences from the datasources mentioned before using either exact matching or Levenshtein distance based matching.

Downloadable data

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Complete structures

Aligned structures [cif]

1QSF assembly 1

Components

MHC Class I alpha chain [cif]

1QSF assembly 1

MHC Class I antigen binding domain (alpha1/alpha2) [cif]

1QSF assembly 1

Peptide only [cif]

1QSF assembly 1

Derived data

Data for this page [json]

https://api.histo.fyi/v1/structures/1qsf

Data license

The data above is made available under a Creative Commons CC-BY 4.0 license. This means you can copy, remix, transform, build upon and redistribute the material, but you must give appropriate credit, provide a link to the license, and indicate if changes were made.

If you use any data downloaded from this site in a publication, please cite 'https://www.histo.fyi/'. A preprint is in preparation.

Footnotes

Protein Data Bank Europe - Coordinate Server
1HHK - HLA-A*02:01 binding LLFGYPVYV at 2.5Å resolution - PDB entry for 1HHK
Protein structure alignment by incremental combinatorial extension (CE) of the optimal path. - PyMol CEALIGN Method - Publication
PyMol - PyMol.org/pymol
Levenshtein distance - Wikipedia entry
Protein Data Bank Europe REST API - Molecules endpoint
3Dmol.js: molecular visualization with WebGL - 3DMol.js - Publication
Protein Data Bank Europe REST API - Publication endpoint
PubMed Central Europe REST API - Articles endpoint

This work is licensed under a Creative Commons Attribution 4.0 International License.