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Cellulose Nitrate Membrane Filters, Type 113, 0.45 μm

Cellulose Nitrate Membrane Filters, Type 113, 0.45 μm

Company: Sartorius
Catalog#: 11306-47-N
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Thermal Stability of Heterotrimeric pMHC Proteins as Determined by Circular Dichroism Spectroscopy
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2017-07-05
[Abstract]  T cell receptor (TCR) recognition of foreign peptide fragments, presented by peptide major histocompatibility complex (pMHC), governs T-cell mediated protection against pathogens and cancer. Many factors govern T-cell sensitivity, including the affinity of the TCR-pMHC interaction and the stability of pMHC on the surface of antigen presenting cells. These factors are particularly relevant for the peptide vaccination field, in which more stable pMHC interactions could enable more effective protection against disease. Here, we discuss a method for the determination of pMHC stability that we have used to investigate HIV immune escape, T-cell sensitivity to cancer antigens and mechanisms leading to autoimmunity. [摘要]  由肽主要组织相容性复合物(pMHC)提供的外源肽片段的T细胞受体(TCR)识别控制T细胞介导的针对病原体和癌症的保护。 许多因素控制T细胞敏感性,包括TCR-pMHC相互作用的亲和力和pMHC在抗原呈递细胞表面的稳定性。 这些因素对于肽疫苗接种领域尤其重要,其中更稳定的pMHC相互作用可以实现更有效的防止疾病的保护。 在这里,我们讨论一种测定pMHC稳定性的方法,我们已经用来调查HIV免疫逃逸,T细胞对癌症抗原的敏感性和导致自身免疫的机制。
【背景】CD8 + T细胞对外来入侵者或失调自身的反应的能力取决于细胞表面上稳定的pMHC I类(pMHCI)表达。在结构上,MHCI分子在α1和α2结构域之间的界面处形成由两个平行的α螺旋形成的肽结合槽,其具有β片的底部(Latron等人,1992)。肽结合槽具有与结合肽的N-和C-末端紧密相互作用的特异性氨基酸的主要肽结合口袋(B和F)。虽然这些口袋可以适应一系列氨基酸,但它们表现出对使用结构和生物化学方法表征的某些侧链的偏好(Parker等人,1992)。该信息已被用于产生所谓的“异型”肽,其中具有差的MHC锚的天然肽可以用与MHC最佳结合的氨基酸进行修饰(Cole等人,2010 ...

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