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2017 ; 7
(1
): 4622
Nephropedia Template TP
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English Wikipedia
HLA-E Presents Glycopeptides from the Mycobacterium tuberculosis Protein MPT32 to
Human CD8(+) T cells
#MMPMID28676677
Harriff MJ
; Wolfe LM
; Swarbrick G
; Null M
; Cansler ME
; Canfield ET
; Vogt T
; Toren KG
; Li W
; Jackson M
; Lewinsohn DA
; Dobos KM
; Lewinsohn DM
Sci Rep
2017[Jul]; 7
(1
): 4622
PMID28676677
show ga
Infection with Mycobacterium tuberculosis (Mtb), the bacterium that causes
tuberculosis, remains a global health concern. Both classically and
non-classically restricted cytotoxic CD8(+) T cells are important to the control
of Mtb infection. We and others have demonstrated that the non-classical MHC I
molecule HLA-E can present pathogen-derived peptides to CD8(+) T cells. In this
manuscript, we identified the antigen recognized by an HLA-E-restricted CD8(+) T
cell clone isolated from an Mtb latently infected individual as a peptide from
the Mtb protein, MPT32. Recognition by the CD8(+) T cell clone required
N-terminal O-linked mannosylation of MPT32 by a mannosyltransferase encoded by
the Rv1002c gene. This is the first description of a post-translationally
modified Mtb-derived protein antigen presented in the context of an HLA-E
specific CD8(+) T cell immune response. The identification of an immune response
that targets a unique mycobacterial modification is novel and may have practical
impact in the development of vaccines and diagnostics.
|A549 Cells
[MESH]
|Antigen Presentation
[MESH]
|Antigens, Bacterial/*immunology
[MESH]
|CD8-Positive T-Lymphocytes/*immunology
[MESH]
|Epitopes, T-Lymphocyte/immunology
[MESH]
|Glycopeptides/immunology
[MESH]
|HEK293 Cells
[MESH]
|HLA-E Antigens
[MESH]
|Histocompatibility Antigens Class I/*immunology
[MESH]