- EMDB-14119: Structure of the human MHC I peptide-loading complex editing module -
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基本情報
登録情報
データベース: EMDB / ID: EMD-14119
タイトル
Structure of the human MHC I peptide-loading complex editing module
マップデータ
試料
複合体: editing module of peptide-loading complex
タンパク質・ペプチド: Beta-2-microglobulin
タンパク質・ペプチド: Tapasin
タンパク質・ペプチド: Protein disulfide-isomerase A3
タンパク質・ペプチド: HLA class I histocompatibility antigen, A-3 alpha chain
タンパク質・ペプチド: Calreticulin
機能・相同性
機能・相同性情報
MHC class Ib protein complex assembly / peptide antigen stabilization / Tapasin-ERp57 complex / Calnexin/calreticulin cycle / MHC class I protein complex binding / TAP1 binding / TAP2 binding / cytolytic granule / positive regulation of dendritic cell chemotaxis / protein disulfide-isomerase ...MHC class Ib protein complex assembly / peptide antigen stabilization / Tapasin-ERp57 complex / Calnexin/calreticulin cycle / MHC class I protein complex binding / TAP1 binding / TAP2 binding / cytolytic granule / positive regulation of dendritic cell chemotaxis / protein disulfide-isomerase / cortical granule / Assembly of Viral Components at the Budding Site / negative regulation of trophoblast cell migration / ATF6 (ATF6-alpha) activates chaperone genes / negative regulation of retinoic acid receptor signaling pathway / cellular response to electrical stimulus / endoplasmic reticulum quality control compartment / nuclear receptor-mediated glucocorticoid signaling pathway / regulation of meiotic nuclear division / complement component C1q complex binding / sequestering of calcium ion / response to glycoside / sarcoplasmic reticulum lumen / disulfide oxidoreductase activity / protein folding in endoplasmic reticulum / nuclear export signal receptor activity / negative regulation of intracellular steroid hormone receptor signaling pathway / regulation of protein complex stability / hormone binding / cardiac muscle cell differentiation / molecular sequestering activity / phospholipase C activity / retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum / positive regulation of extrinsic apoptotic signaling pathway / cellular response to interleukin-7 / protein maturation by protein folding / Scavenging by Class F Receptors / Scavenging by Class A Receptors / cortical actin cytoskeleton organization / T cell mediated cytotoxicity directed against tumor cell target / positive regulation of memory T cell activation / TAP complex binding / nuclear androgen receptor binding / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / Golgi medial cisterna / positive regulation of CD8-positive, alpha-beta T cell proliferation / cellular response to lithium ion / CD8 receptor binding / response to testosterone / protein disulfide isomerase activity / MHC class I protein binding / antigen processing and presentation of exogenous peptide antigen via MHC class I / endoplasmic reticulum exit site / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-dependent / TAP binding / protein localization to nucleus / protection from natural killer cell mediated cytotoxicity / negative regulation of neuron differentiation / protein-disulfide reductase activity / smooth endoplasmic reticulum / beta-2-microglobulin binding / T cell receptor binding / positive regulation of cell cycle / detection of bacterium / ERAD pathway / extrinsic apoptotic signaling pathway / positive regulation of substrate adhesion-dependent cell spreading / protein folding chaperone / positive regulation of phagocytosis / endocytic vesicle lumen / protein export from nucleus / phagocytic vesicle / positive regulation of endothelial cell migration / endoplasmic reticulum-Golgi intermediate compartment membrane / response to endoplasmic reticulum stress / acrosomal vesicle / positive regulation of ferrous iron binding / positive regulation of transferrin receptor binding / positive regulation of receptor binding / early endosome lumen / Nef mediated downregulation of MHC class I complex cell surface expression / DAP12 interactions / negative regulation of receptor binding / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-independent / antigen processing and presentation of endogenous peptide antigen via MHC class Ib / lumenal side of endoplasmic reticulum membrane / cellular response to iron ion / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / peptide binding / cellular response to iron(III) ion / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / negative regulation of forebrain neuron differentiation / regulation of erythrocyte differentiation / ER to Golgi transport vesicle membrane / peptide antigen assembly with MHC class I protein complex / regulation of iron ion transport / response to molecule of bacterial origin / MHC class I peptide loading complex 類似検索 - 分子機能
Protein disulfide-isomerase A3, first redox inactive TRX-like domain b / Tapasin / Calreticulin / Calreticulin family repeated motif signature. / Calreticulin/calnexin / Calreticulin/calnexin, P domain superfamily / Calreticulin/calnexin, conserved site / Calreticulin family / Calreticulin family signature 1. / Calreticulin family signature 2. ...Protein disulfide-isomerase A3, first redox inactive TRX-like domain b / Tapasin / Calreticulin / Calreticulin family repeated motif signature. / Calreticulin/calnexin / Calreticulin/calnexin, P domain superfamily / Calreticulin/calnexin, conserved site / Calreticulin family / Calreticulin family signature 1. / Calreticulin family signature 2. / Protein disulphide isomerase / Thioredoxin-like domain / Disulphide isomerase / : / Endoplasmic reticulum targeting sequence. / Thioredoxin / Thioredoxin, conserved site / Thioredoxin family active site. / Thioredoxin domain profile. / Thioredoxin domain / MHC class I, alpha chain, C-terminal / MHC_I C-terminus / MHC class I alpha chain, alpha1 alpha2 domains / Class I Histocompatibility antigen, domains alpha 1 and 2 / Beta-2-Microglobulin / MHC class I-like antigen recognition-like / MHC class I-like antigen recognition-like superfamily / MHC classes I/II-like antigen recognition protein / Concanavalin A-like lectin/glucanase domain superfamily / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set / Immunoglobulin C1-set domain / Thioredoxin-like superfamily / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulin-like fold 類似検索 - ドメイン・相同性
Tapasin / HLA class I histocompatibility antigen, A alpha chain / Calreticulin / Protein disulfide-isomerase A3 / Beta-2-microglobulin 類似検索 - 構成要素
ジャーナル: Nat Commun / 年: 2022 タイトル: Molecular basis of MHC I quality control in the peptide loading complex. 著者: Alexander Domnick / Christian Winter / Lukas Sušac / Leon Hennecke / Mario Hensen / Nicole Zitzmann / Simon Trowitzsch / Christoph Thomas / Robert Tampé / 要旨: Major histocompatibility complex class I (MHC I) molecules are central to adaptive immunity. Their assembly, epitope selection, and antigen presentation are controlled by the MHC I glycan through a ...Major histocompatibility complex class I (MHC I) molecules are central to adaptive immunity. Their assembly, epitope selection, and antigen presentation are controlled by the MHC I glycan through a sophisticated network of chaperones and modifying enzymes. However, the mechanistic integration of the corresponding processes remains poorly understood. Here, we determine the multi-chaperone-client interaction network of the peptide loading complex (PLC) and report the PLC editing module structure by cryogenic electron microscopy at 3.7 Å resolution. Combined with epitope-proofreading studies of the PLC in near-native lipid environment, these data show that peptide-receptive MHC I molecules are stabilized by multivalent chaperone interactions including the calreticulin-engulfed mono-glucosylated MHC I glycan, which only becomes accessible for processing by α-glucosidase II upon loading of optimal epitopes. Our work reveals allosteric coupling between peptide-MHC I assembly and glycan processing. This inter-process communication defines the onset of an adaptive immune response and provides a prototypical example of the tightly coordinated events in endoplasmic reticulum quality control.