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2HJL

HLA-B*57:06 binding "KAFNPEIIPMF" at 1.50Å 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

1. Beta 2 microglobulin
['B']
2. Class I alpha
HLA-B*57:06
['A']
3. Peptide
KAFNPEIIPMF
['C']

Species


Locus / Allele group


Publication

Strong TCR conservation and altered T cell cross-reactivity characterize a B*57-restricted immune response in HIV-1 infection.

Gillespie GM, Stewart-Jones G, Rengasamy J, Beattie T, Bwayo JJ, Plummer FA, Kaul R, McMichael AJ, Easterbrook P, Dong T, Jones EY, Rowland-Jones SL
J. Immunol. (2006) 177, 3893-902 [doi:10.4049/jimmunol.177.6.3893]  [pubmed:16951352

HLA-B*57 is associated with slower disease progression to AIDS, and CD8+ T cell responses to B*57-restricted epitopes are thought to contribute to this protective effect. In this study, we evaluate the B*57-restricted p24 KAFSPEVIPMF (KF11) immune response which is immunodominant during chronic infection. Previously, we observed that the KF11 clade variants KGFNPEVIPMF [A2G,S4N] and KAFNPEIIMPF [S4N,V7I], sharing a position 4 mutation, are differentially recognized by KF11-specific T cells. By combining structural and cellular studies, we now demonstrate that the KF11 and [A2G,S4N] epitopes induce distinct functional responses in [A2G,S4N] and KF11-specific T cells, respectively, despite minimal structural differences between the individual B*57-peptide complexes. Recently, we also elucidated the highly distinct structure of KF11 in complex with B*5703, and have now characterized the CD8+ T cell repertoire recognizing this epitope. We now report striking features of TCR conservation both in terms of TCR Valpha and Vbeta chain usage, and throughout the hypervariable region. Collectively, our findings highlight unusual features of the B*5701/B*5703-KF11-specific immune responses which could influence disease progression and that might be important to consider when designing future vaccine regimens.

Structure deposition and release

Deposited: 2006-06-30
Released: 2006-10-03
Revised: 2011-07-13

Data provenance

Publication data retrieved from PDBe REST API8 and PMCe REST API9

Other structures from this publication


Peptide details

Length: Undecamer (11 amino acids)

Sequence: KAFNPEIIPMF

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 LYS

TYR171
TYR159
TRP167
MET5
PHE33
TYR59
GLU63
TYR7
P10 MET

TRP147
LYS146
ASN77
GLU76
ILE80
THR73
ILE143
P11 PHE

ILE80
TYR84
TYR123
ILE95
ILE143
ALA81
TRP147
SER116
TYR74
ILE142
LYS146
ASN77
P2 ALA

MET45
TYR9
GLU63
TYR7
TYR99
ASN66
TYR159
P3 PHE

LEU156
GLN155
TYR159
TYR9
TYR99
ASN66
P4 ASN

ASN66
GLY62
P5 PRO

GLN155
P6 GLU

GLN155
P7 ILE

GLN155
P8 ILE

SER70
TYR74
ALA69
THR73
P9 PRO

VAL152
TRP147
LEU156
ASN77
THR73

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
TRP167
TYR171
MET5
TYR59
GLU63
ASN66
TYR7
B Pocket

ALA24
VAL34
MET45
GLU63
ASN66
MET67
TYR7
SER70
TYR9
TYR99
C Pocket

SER70
THR73
TYR74
TYR9
VAL97
D Pocket

ASP114
GLN155
LEU156
TYR159
LEU160
TYR99
E Pocket

ASP114
TRP147
VAL152
LEU156
VAL97
F Pocket

SER116
TYR123
ILE143
LYS146
TRP147
ASN77
ILE80
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-B*57:06
IPD-IMGT/HLA
[ipd-imgt:HLA01074]
        10        20        30        40        50        60
GSHSMRYFYTAMSRPGRGEPRFIAVGYVDDTQFVRFDSDAASPRMAPRAPWIEQEGPEYW
        70        80        90       100       110       120
DGETRNMKASAQTYRENLRIALRYYNQSEAGSHIIQVMYGCDVGPDGRLLRGHDQSAYDG
       130       140       150       160       170       180
KDYIALNEDLSSWTAADTAAQIIQRKWEAARVAEQLRAYLEGLCVEWLRRYLENGKETLQ
       190       200       210       220       230       240
RADPPKTHVTHHPISDHEATLRCWALGFYPAEITLTWQRDGEDQTQDTELVETRPAGDRT
       250       260       270
FQKWAAVVVPSGEEQRYTCHVQHEGLPKPLTLRW

3. Peptide
KAFNPEIIPMF


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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Please take note of the data license. Using data from this site assumes that you have read and will comply with the license.

Complete structures

Aligned structures [cif]
  1. 2HJL assembly 1  

Components

MHC Class I alpha chain [cif]
  1. 2HJL assembly 1  
MHC Class I antigen binding domain (alpha1/alpha2) [cif]
  1. 2HJL assembly 1  
Peptide only [cif]
  1. 2HJL assembly 1  

Derived data

Data for this page [json]
https://api.histo.fyi/v1/structures/2hjl

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