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@ARTICLE{Fisette:889726,
author = {Fisette, Olivier and Schröder, Gunnar F. and Schäfer,
Lars V.},
title = {{A}tomistic structure and dynamics of the human {MHC}-{I}
peptide-loading complex},
journal = {Proceedings of the National Academy of Sciences of the
United States of America},
volume = {117},
number = {34},
issn = {1091-6490},
address = {Washington, DC},
publisher = {National Acad. of Sciences},
reportid = {FZJ-2021-00347},
pages = {20597 - 20606},
year = {2020},
abstract = {The major histocompatibility complex class-I (MHC-I)
peptide-loading complex (PLC) is a cornerstone of the human
adaptive immune system, being responsible for processing
antigens that allow killer T cells to distinguish between
healthy and compromised cells. Based on a recent
low-resolution cryo-electron microscopy (cryo-EM) structure
of this large membrane-bound protein complex, we report an
atomistic model of the PLC and study its conformational
dynamics on the multimicrosecond time scale using all-atom
molecular dynamics (MD) simulations in an explicit lipid
bilayer and water environment (1.6 million atoms in total).
The PLC has a layered structure, with two editing modules
forming a flexible protein belt surrounding a stable,
catalytically active core. Tapasin plays a central role in
the PLC, stabilizing the MHC-I binding groove in a
conformation reminiscent of antigen-loaded MHC-I. The
MHC-I–linked glycan steers a tapasin loop involved in
peptide editing toward the binding groove. Tapasin
conformational dynamics are also affected by calreticulin
through a conformational selection mechanism that
facilitates MHC-I recruitment into the complex.},
cin = {IBI-7},
ddc = {500},
cid = {I:(DE-Juel1)IBI-7-20200312},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
pubmed = {32788370},
UT = {WOS:000572978200009},
doi = {10.1073/pnas.2004445117},
url = {https://juser.fz-juelich.de/record/889726},
}