PXD030591-1

PXD030591 is an original dataset announced via ProteomeXchange.

Title	Promiscuity of peptides presented in HLA-DP molecules from different immunogenicity groups is associated with T-cell cross-reactivity
Description	In the context of HLA-DP-mismatched allogeneic stem cell transplantation, mismatched HLA-DP alleles can provoke profound allo-HLA-DP-specific immune responses from the donor T-cell repertoire leading to graft-versus-leukemia effect and/or graft-versus-host disease in the patient. The magnitude of allo-HLA-DP-specific immune responses has been shown to depend on the specific HLA-DP disparity between donor and patient and the immunogenicity of the mismatched HLA-DP allele(s). HLA-DP peptidome clustering (DPC) was developed to classify the HLA-DP molecules based on similarities and differences in their peptide-binding motifs. To investigate a possible categorization of HLA-DP molecules based on overlap of presented peptides, we identified and compared the peptidomes of the thirteen most frequently expressed HLA-DP molecules. Our categorization based on shared peptides was in line with the DPC classification. We found that the HLA-DP molecules within the previously defined groups DPC-1 or DPC-3 shared the largest numbers of presented peptides. However, the HLA-DP molecules in DPC-2 segregated into two subgroups based on the overlap in presented peptides. Besides overlap in presented peptides within the DPC groups, a substantial number of peptides was also found to be shared between HLA-DP molecules from different DPC groups, especially for groups DPC-1 and -2. The functional relevance of these findings was illustrated by demonstration of cross-reactivity of allo-HLA-DP-reactive T-cell clones not only against HLA-DP molecules within one DPC group, but also across different DPC groups. The promiscuity of peptides presented in various HLA-DP molecules and the cross-reactivity against different HLA-DP molecules demonstrate that these molecules cannot be strictly categorized in immunogenicity groups.
HostingRepository	PRIDE
AnnounceDate	2022-02-12
AnnouncementXML	Submission_2022-02-11_16:08:30.876.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	G Janssen
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	acetylated residue; monohydroxylated residue
Instrument	Orbitrap Fusion Lumos; Orbitrap Exploris 480

Revision	Datetime	Status	ChangeLog Entry
0	2021-12-22 02:19:45	ID requested
⏵ 1	2022-02-11 16:08:31	announced

Dataset with its publication pending

submitter keyword: AlloSCT, HLA-DP, peptidome, DPC-classification, CD4 T-cell clones, cross-reactivity

P.A. van Veelen
contact affiliation	Head Proteomics Group | Leiden University Medical Center |Center for Proteomics and Metabolomics | PO Box 9600 | 2300 RC Leiden | The Netherlands
contact email	p.a.van_veelen@lumc.nl
lab head
G Janssen
contact affiliation	Leiden University Medical Center
contact email	g.m.c.janssen@lumc.nl
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD030591
     1. Label: PRIDE project
     2. Name: Promiscuity of peptides presented in HLA-DP molecules from different immunogenicity groups is associated with T-cell cross-reactivity