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1BD2

HLA-A*02:01 presenting "LLFGYPVYV" to Alpha/Beta T cell receptor at 2.50Å 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.

Information sections


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
LLFGYPVYV
['C']
4. T cell receptor alpha
TRAV29
['D']
5. T cell receptor beta
TRBV6
['E']

Species


Locus / Allele group


Publication

Two human T cell receptors bind in a similar diagonal mode to the HLA-A2/Tax peptide complex using different TCR amino acids.

Ding YH, Smith KJ, Garboczi DN, Utz U, Biddison WE, Wiley DC
Immunity (1998) 8, 403-11 [doi:10.1016/s1074-7613(00)80546-4]  [pubmed:9586631

The three-dimensional structure of a human alphabeta T cell receptor (TCR), B7, bound to the HLA-A2 molecule/HTLV-1 Tax peptide complex was determined by x-ray crystallography. Although different from the A6 TCR, previously studied, in 16 of the 17 residues that contact HLA-A2/Tax, the B7 TCR binds in a similar diagonal manner, only slightly tipped and rotated, relative to the A6 TCR. The structure explains data from functional assays on the specificity differences between the B7 and A6 TCRs for agonist, partial agonist, and null peptides. The existence of a structurally similar diagonal binding mode for TCRs favors mechanisms based on the formation of geometrically defined supramolecular assemblies for initiating signaling.

Structure deposition and release

Deposited: 1998-05-12
Released: 1998-08-19
Revised: 2016-05-25

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: LLFGYPVYV

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

TYR171
TYR59
MET5
TYR159
TYR7
THR163
LYS66
GLU63
TRP167
P2 LEU

MET45
PHE9
LYS66
GLU63
TYR7
HIS70
VAL67
TYR159
TYR99
P3 PHE

GLN155
TYR99
LEU156
TYR159
VAL152
HIS70
LYS66
P4 GLY

LYS66
P5 TYR

VAL152
GLN155
P6 PRO

HIS70
ARG97
THR73
ALA69
P7 VAL

TRP147
VAL152
ASP77
ARG97
THR73
P8 TYR

ASP77
LYS146
GLN72
VAL76
THR73
TRP147
P9 VAL

ASP77
TYR84
TYR123
LYS146
THR143
LEU81
TRP147
THR80
TYR116

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-A*02:01
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
RTDAPKTHMTHHAVSDHEATLRCWALSFYPAEITLTWQRDGEDQTQDTELVETRPAGDGT
       250       260       270
FQKWAAVVVPSGQEQRYTCHVQHEGLPKPLTLRWE

3. Peptide
LLFGYPVYV

4. T cell receptor alpha
T cell receptor alpha
TRAV29
        10        20        30        40        50        60
QQVKQNSPSLSVQEGRISILNCDYTNSMFDYFLWYKKYPAEGPTFLISISSIKDKNADGR
        70        80        90       100       110       120
FTVFLNKSAKHLSLHIVPSQPGDSAVYFCAAMEGAQKLVFGQGTRLTINPNIQNPDPAVY
       130       140       150       160       170       180
QLRDSKSSDKSVCLFTDFDSQTNVSQSKDSDVYITDKTVLDMRSMDFKSNSAVAWSNKSD
       190       200
FACANAFNNSIIPEDTFFPSPESS

5. T cell receptor beta
T cell receptor beta
TRBV6
        10        20        30        40        50        60
NAGVTQTPKFQVLKTGQSMTLQCAQDMNHEYMSWYRQDPGMGLRLIHYSVGAGITDQGEV
        70        80        90       100       110       120
PNGYNVSRSTTEDFPLRLLSAAPSQTSVYFCASSYPGGGFYEQYFGPGTRLTVTEDLKNV
       130       140       150       160       170       180
FPPEVAVFEPSEAEISHTQKATLVCLATGFYPDHVELSWWVNGKEVHSGVSTDPQPLKEQ
       190       200       210       220       230       240
PALNDSRYALSSRLRVSATFWQDPRNHFRCQVQFYGLSENDEWTQDRAKPVTQIVSAEAW

GRAD


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]
  1. 1BD2 assembly 1  

Components

MHC Class I alpha chain [cif]
  1. 1BD2 assembly 1  
MHC Class I antigen binding domain (alpha1/alpha2) [cif]
  1. 1BD2 assembly 1  
Peptide only [cif]
  1. 1BD2 assembly 1  

Derived data

Data for this page [json]
https://api.histo.fyi/v1/structures/1bd2

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