3DX7

HLA-B*44:03 binding "EENLLDFVRF" at 1.60Å 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

1. Beta 2 microglobulin

['B']

2. Class I alpha
HLA-B*44:03

['A']

3. Peptide
EENLLDFVRF

['C']

Species

Homo sapiens (Human)

Locus / Allele group

HLA-B / HLA-B*44

Publication

Natural micropolymorphism in human leukocyte antigens provides a basis for genetic control of antigen recognition.

Archbold JK, Macdonald WA, Gras S, Ely LK, Miles JJ, Bell MJ, Brennan RM, Beddoe T, Wilce MC, Clements CS, Purcell AW, McCluskey J, Burrows SR, Rossjohn J

J. Exp. Med. (2009) 206, 209-19 [doi:10.1084/jem.20082136] [pubmed:19139173]

Human leukocyte antigen (HLA) gene polymorphism plays a critical role in protective immunity, disease susceptibility, autoimmunity, and drug hypersensitivity, yet the basis of how HLA polymorphism influences T cell receptor (TCR) recognition is unclear. We examined how a natural micropolymorphism in HLA-B44, an important and large HLA allelic family, affected antigen recognition. T cell-mediated immunity to an Epstein-Barr virus determinant (EENLLDFVRF) is enhanced when HLA-B*4405 was the presenting allotype compared with HLA-B*4402 or HLA-B*4403, each of which differ by just one amino acid. The micropolymorphism in these HLA-B44 allotypes altered the mode of binding and dynamics of the bound viral epitope. The structure of the TCR-HLA-B*4405(EENLLDFVRF) complex revealed that peptide flexibility was a critical parameter in enabling preferential engagement with HLA-B*4405 in comparison to HLA-B*4402/03. Accordingly, major histocompatibility complex (MHC) polymorphism can alter the dynamics of the peptide-MHC landscape, resulting in fine-tuning of T cell responses between closely related allotypes.

Structure deposition and release

Deposited: 2008-07-23

Released: 2009-01-27

Revised: 2021-10-20

Data provenance

Publication data retrieved from PDBe REST API8 and PMCe REST API9

Other structures from this publication

Peptide details

Length: Decamer (10 amino acids)

Sequence: EENLLDFVRF

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 GLU

TYR171

TYR59

LEU163

SER167

CYS164

TYR99

GLU63

MET5

TYR159

ARG62

TYR7

ARG170

P10 PHE

ILE142

THR80

TYR84

TYR123

ASN77

THR143

ASP116

ALA81

ILE95

TYR74

TRP147

LYS146

P2 GLU

TYR7

ASN70

TYR159

ILE66

LYS45

TYR9

LEU163

SER67

TYR99

THR24

GLU63

P3 ASN

TYR99

LEU156

GLN155

TYR159

ILE66

TYR9

P4 LEU

ASN70

ILE66

THR69

P5 LEU

LEU156

ARG97

GLN155

ASP114

VAL152

P6 ASP

GLN155

P8 VAL

TRP147

THR73

VAL152

ASN77

GLN155

P9 ARG

GLU76

LYS146

THR73

TRP147

ASN77

THR143

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

LEU163

SER167

TYR171

MET5

TYR59

GLU63

ILE66

TYR7

B Pocket

THR24

VAL34

LYS45

GLU63

ILE66

SER67

TYR7

ASN70

TYR9

TYR99

C Pocket

ASN70

THR73

TYR74

TYR9

ARG97

D Pocket

ASP114

GLN155

LEU156

TYR159

LEU160

TYR99

E Pocket

ASP114

TRP147

VAL152

LEU156

ARG97

F Pocket

ASP116

TYR123

THR143

LYS146

TRP147

ASN77

THR80

ALA81

TYR84

ILE95

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 IQRTPKIQVYSRHPAENGKSNFLNCYVSGFHPSDIEVDLLKNGERIEKVEHSDLSFSKDW 70 80 90 SFYLLYYTEFTPTEKDEYACRVNHVTLSQPKIVKWDRDM

2. Class I alpha HLA-B44:03 IPD-IMGT/HLA* [ipd-imgt:HLA34832]	10 20 30 40 50 60 GSHSMRYFYTAMSRPGRGEPRFITVGYVDDTLFVRFDSDATSPRKEPRAPWIEQEGPEYW 70 80 90 100 110 120 DRETQISKTNTQTYRENLRTALRYYNQSEAGSHIIQRMYGCDVGPDGRLLRGYDQDAYDG 130 140 150 160 170 180 KDYIALNEDLSSWTAADTAAQITQRKWEAARVAEQLRAYLEGLCVESLRRYLENGKETLQ 190 200 210 220 230 240 RADPPKTHVTHHPISDHEVTLRCWALGFYPAEITLTWQRDGEDQTQDTELVETRPAGDRT 250 260 270 FQKWAAVVVPSGEEQRYTCHVQHEGLPKPLTLRWEP

3. Peptide	EENLLDFVRF

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]

3DX7 assembly 1

Components

MHC Class I alpha chain [cif]

3DX7 assembly 1

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

3DX7 assembly 1

Peptide only [cif]

3DX7 assembly 1

Derived data

Data for this page [json]

https://api.histo.fyi/v1/structures/3dx7

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.