7CIQ

HLA-B*27:05 binding "RRFSRSPIRR" at 1.59Å 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*27:05

['A']

3. Peptide
RRFSRSPIRR

['C']

Species

Homo sapiens (Human)

Locus / Allele group

HLA-B / HLA-B*27

Publication

Phosphorylation modification of MHC I polypeptide

Sun, M.W., Feng, L., Qi, J.X., Liu, W.J., Gao, G.F.

Structure deposition and release

Deposited: 2020-07-08

Released: 2022-03-09

Revised: 2022-03-09

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: RRFSRSPIRR

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 ARG

TYR171

GLU163

ARG62

GLU63

MET5

TYR7

TRP167

TYR159

TYR59

P10 ARG

TRP147

ILE142

ASP77

TYR84

ASP116

LYS70

LYS146

ASN97

TYR123

LEU95

ASP74

GLN96

THR143

LEU81

THR80

P2 ARG

CYS67

TYR7

ARG62

VAL34

VAL25

TYR159

HIS9

GLY26

TYR99

THR24

GLU163

GLU63

ILE66

GLU45

P3 PHE

TYR99

TYR159

GLN155

ARG62

LEU156

ILE66

P4 SER

ARG62

ILE66

P5 ARG

GLN155

P6 SER

TYR99

LYS70

P7 PRO

TRP147

LEU156

HIS114

VAL152

LYS70

THR73

P8 ILE

THR73

TRP147

P9 ARG

THR73

GLU76

THR143

TRP147

ASP77

LYS146

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

GLU163

TRP167

TYR171

MET5

TYR59

GLU63

ILE66

TYR7

B Pocket

THR24

VAL34

GLU45

GLU63

ILE66

CYS67

TYR7

LYS70

HIS9

TYR99

C Pocket

LYS70

THR73

ASP74

HIS9

ASN97

D Pocket

HIS114

GLN155

LEU156

TYR159

LEU160

TYR99

E Pocket

HIS114

TRP147

VAL152

LEU156

ASN97

F Pocket

ASP116

TYR123

THR143

LYS146

TRP147

ASP77

THR80

LEU81

TYR84

LEU95

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-B27:05 IPD-IMGT/HLA* [ipd-imgt:HLA34811]	10 20 30 40 50 60 GSHSMRYFHTSVSRPGRGEPRFITVGYVDDTLFVRFDSDAASPREEPRAPWIEQEGPEYW 70 80 90 100 110 120 DRETQICKAKAQTDREDLRTLLRYYNQSEAGSHTLQNMYGCDVGPDGRLLRGYHQDAYDG 130 140 150 160 170 180 KDYIALNEDLSSWTAADTAAQITQRKWEAARVAEQLRAYLEGECVEWLRRYLENGKETLQ 190 200 210 220 230 240 RADPPKTHVTHHPISDHEATLRCWALGFYPAEITLTWQRDGEDQTQDTELVETRPAGDRT 250 260 270 FQKWAAVVVPSGEEQRYTCHVQHEGLPKPLTLRWEP

3. Peptide	RRFSRSPIRR

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

Data can be downloaded to your local machine from the links below.

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e.g. load http://www.histo.fyi/structures/downloads/1hhk_1_peptide.cif

or in the case of JSON formatted files to retrieve it and use it as part of notebooks such as Jupyter or GoogleColab.

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]

7CIQ assembly 1

Components

MHC Class I alpha chain [cif]

7CIQ assembly 1

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

7CIQ assembly 1

Peptide only [cif]

7CIQ assembly 1

Derived data

Data for this page [json]

https://api.histo.fyi/v1/structures/7ciq

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.