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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Tapasin enhances MHC class Ⅰ peptide presentation according to peptide half-life
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Tapasin enhances MHC class Ⅰ peptide presentation according to peptide half-life

机译:Tapasin通过肽半衰期增强MHCⅠ类肽的呈递

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摘要

Understanding how peptides are selected for presentation by MHC class Ⅰ is crucial to vaccination strategies based on cytotoxic T lymphocyte priming. We have studied this selection of the MHC class Ⅰ peptide repertoire in terms of the presentation of a series of individual peptides with a wide range of binding to MHC class Ⅰ. This series was expressed as minigenes, and the presentation of each peptide variant was determined with the same MHC class Ⅰ peptide-specific antibody. In wild-type cells, the hierarchy of presentation followed peptide half-life. This hierarchy broke down in cells lacking tapasin but not in cells lacking calreticulin or in cells lacking transporter associated with antigen processing-associated ERp57. We demonstrate a key role for tapasin in shaping the MHC class Ⅰ peptide repertoire, as enhancement of presentation in the presence of tapasin correlated with peptide half-life.
机译:了解如何通过Ⅰ类MHC来选择肽段对于基于细胞毒性T淋巴细胞引发的疫苗接种策略至关重要。我们通过一系列与MHCⅠ类结合广泛的单个肽的研究,研究了MHCⅠ类肽库的选择。该系列表达为小基因,并使用相同的MHCⅠ类肽特异性抗体确定每种肽变体的表达。在野生型细胞中,呈递的层次遵循肽的半衰期。在缺少塔帕霉素的细胞中,但在没有钙网蛋白的细胞中,或在缺乏与抗原加工相关的ERp57相关的转运蛋白的细胞中,这种层次结构却破裂了。我们证明了Tapasin在塑造Ⅰ类MHC肽库中的关键作用,因为在存在与肽半衰期相关的tapasin时增强了表达。

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