Insights into MHC class I peptide loading from the structure of the tapasin-ERp57 thiol oxidoreductase heterodimer.
Insights into MHC class I peptide loading from the structure of the tapasin-ERp57 thiol oxidoreductase heterodimer.
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DOI:
10.1016/j.immuni.2008.10.018
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发表时间:
2009-01-16
期刊:
影响因子:
32.4
通讯作者:
Reinisch, Karin M.
中科院分区:
文献类型:
--
作者:
Dong, Gang;Wearsch, Pamela A.;Peaper, David R.;Cresswell, Peter;Reinisch, Karin M.
Tapasin is a glycoprotein critical for loading Major Histocompatibility Complex (MHC) class I molecules with high affinity peptides. It functions within the multimeric peptide-loading complex (PLC) as a disulfide-linked, stable heterodimer with the thiol oxidoreductase ERp57, and this covalent interaction is required to support optimal PLC activity. Here we present the 2.6 Å resolution structure of the tapasin/ERp57 core of the PLC. The structure reveals the basis for the stable dimerization of tapasin and ERp57 and provides the first example of a protein disulfide isomerase family member interacting with a substrate. Mutational analysis identified a conserved surface on tapasin that interacts with MHC class I molecules and is critical for the peptide loading and editing function of the tapasin-ERp57 heterodimer. By combining the tapasin/ERp57 structure with those of other defined PLC components we present a molecular model that illuminates the processes involved in MHC class I peptide loading.
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影响因子:
11.4
作者:
Chen, Mingnan;Bouvier, Marlene
通讯作者:
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
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通讯作者:
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DOI:
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发表时间:
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期刊:
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影响因子:
--
作者:
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通讯作者:
Warren, GL
影响因子:
30.5
作者:
Garbi, N;Tanaka, S;Hämmerling, GJ
通讯作者:
Hämmerling, GJ