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oai:repisalud.isciii.es:20.500.12105/134202024-11-29T10:52:40Zcom_20.500.12105_19604com_20.500.12105_2051com_20.500.12105_15322col_20.500.12105_19605col_20.500.12105_16980

00925njm 22002777a 4500 dc Martin-Cofreces, Noa B. author Valpuesta, Jose Maria author Sanchez-Madrid, Francisco author 2021-04-30 Lymphocytes rearrange their shape, membrane receptors and organelles during cognate contacts with antigen-presenting cells (APCs). Activation of T cells by APCs through pMHC-TCR/CD3 interaction (peptide-major histocompatibility complex-T cell receptor/CD3 complexes) involves different steps that lead to the reorganization of the cytoskeleton and organelles and, eventually, activation of nuclear factors allowing transcription and ultimately, replication and cell division. Both the positioning of the lymphocyte centrosome in close proximity to the APC and the nucleation of a dense microtubule network beneath the plasma membrane from the centrosome support the T cell's intracellular polarity. Signaling from the TCR is facilitated by this traffic, which constitutes an important pathway for regulation of T cell activation. The coordinated enrichment upon T cell stimulation of the chaperonin CCT (chaperonin-containing tailless complex polypeptide 1; also termed TRiC) and tubulins at the centrosome area support polarized tubulin polymerization and T cell activation. The proteasome is also enriched in the centrosome of activated T cells, providing a mechanism to balance local protein synthesis and degradation. CCT assists the folding of proteins coming from de novo synthesis, therefore favoring mRNA translation. The functional role of this chaperonin in regulating cytoskeletal composition and dynamics at the immune synapse is discussed. Front Cell Dev Biol. 2021; 9:658460 10.3389/fcell.2021.658460 2296-634X Frontiers in cell and developmental biology 33912568 http://hdl.handle.net/20.500.12105/13420 Folding for the Immune Synapse: CCT Chaperonin and the Cytoskeleton.