5bs0: Difference between revisions

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'''Unreleased structure'''


The entry 5bs0 is ON HOLD until Paper Publication
==MAGE-A3 Reactive TCR in complex with Titin Epitope in HLA-A1==
<StructureSection load='5bs0' size='340' side='right' caption='[[5bs0]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5bs0]] is a 5 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5BS0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5BS0 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5brz|5brz]]</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Non-specific_serine/threonine_protein_kinase Non-specific serine/threonine protein kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.11.1 2.7.11.1] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5bs0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5bs0 OCA], [http://pdbe.org/5bs0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5bs0 RCSB], [http://www.ebi.ac.uk/pdbsum/5bs0 PDBsum]</span></td></tr>
</table>
== Disease ==
[[http://www.uniprot.org/uniprot/TITIN_HUMAN TITIN_HUMAN]] Defects in TTN are the cause of hereditary myopathy with early respiratory failure (HMERF) [MIM:[http://omim.org/entry/603689 603689]]; also known as Edstrom myopathy. HMERF is an autosomal dominant, adult-onset myopathy with early respiratory muscle involvement.<ref>PMID:15802564</ref>  Defects in TTN are the cause of familial hypertrophic cardiomyopathy type 9 (CMH9) [MIM:[http://omim.org/entry/613765 613765]]. Familial hypertrophic cardiomyopathy is a hereditary heart disorder characterized by ventricular hypertrophy, which is usually asymmetric and often involves the interventricular septum. The symptoms include dyspnea, syncope, collapse, palpitations, and chest pain. They can be readily provoked by exercise. The disorder has inter- and intrafamilial variability ranging from benign to malignant forms with high risk of cardiac failure and sudden cardiac death.<ref>PMID:10462489</ref>  Defects in TTN are the cause of cardiomyopathy dilated type 1G (CMD1G) [MIM:[http://omim.org/entry/604145 604145]]. Dilated cardiomyopathy is a disorder characterized by ventricular dilation and impaired systolic function, resulting in congestive heart failure and arrhythmia. Patients are at risk of premature death.<ref>PMID:11846417</ref> <ref>PMID:11788824</ref> <ref>PMID:16465475</ref>  Defects in TTN are the cause of tardive tibial muscular dystrophy (TMD) [MIM:[http://omim.org/entry/600334 600334]]; also known as Udd myopathy. TMD is an autosomal dominant, late-onset distal myopathy. Muscle weakness and atrophy are usually confined to the anterior compartment of the lower leg, in particular the tibialis anterior muscle. Clinical symptoms usually occur at age 35-45 years or much later.<ref>PMID:12145747</ref> <ref>PMID:12891679</ref>  Defects in TTN are the cause of limb-girdle muscular dystrophy type 2J (LGMD2J) [MIM:[http://omim.org/entry/608807 608807]]. LGMD2J is an autosomal recessive degenerative myopathy characterized by progressive weakness of the pelvic and shoulder girdle muscles. Severe disability is observed within 20 years of onset.  Defects in TTN are the cause of early-onset myopathy with fatal cardiomyopathy (EOMFC) [MIM:[http://omim.org/entry/611705 611705]]. Early-onset myopathies are inherited muscle disorders that manifest typically from birth or infancy with hypotonia, muscle weakness, and delayed motor development. EOMFC is a titinopathy that, in contrast with the previously described examples, involves both heart and skeletal muscle, has a congenital onset, and is purely recessive. This phenotype is due to homozygous out-of-frame TTN deletions, which lead to a total absence of titin's C-terminal end from striated muscles and to secondary CAPN3 depletion.<ref>PMID:17444505</ref>  [[http://www.uniprot.org/uniprot/B2MG_HUMAN B2MG_HUMAN]] Defects in B2M are the cause of hypercatabolic hypoproteinemia (HYCATHYP) [MIM:[http://omim.org/entry/241600 241600]]. Affected individuals show marked reduction in serum concentrations of immunoglobulin and albumin, probably due to rapid degradation.<ref>PMID:16549777</ref>  Note=Beta-2-microglobulin may adopt the fibrillar configuration of amyloid in certain pathologic states. The capacity to assemble into amyloid fibrils is concentration dependent. Persistently high beta(2)-microglobulin serum levels lead to amyloidosis in patients on long-term hemodialysis.<ref>PMID:3532124</ref> <ref>PMID:1336137</ref> <ref>PMID:7554280</ref> <ref>PMID:4586824</ref> <ref>PMID:8084451</ref> <ref>PMID:12119416</ref> <ref>PMID:12796775</ref> <ref>PMID:16901902</ref> <ref>PMID:16491088</ref> <ref>PMID:17646174</ref> <ref>PMID:18835253</ref> <ref>PMID:18395224</ref> <ref>PMID:19284997</ref> 
== Function ==
[[http://www.uniprot.org/uniprot/1A01_HUMAN 1A01_HUMAN]] Involved in the presentation of foreign antigens to the immune system. [[http://www.uniprot.org/uniprot/TITIN_HUMAN TITIN_HUMAN]] Key component in the assembly and functioning of vertebrate striated muscles. By providing connections at the level of individual microfilaments, it contributes to the fine balance of forces between the two halves of the sarcomere. The size and extensibility of the cross-links are the main determinants of sarcomere extensibility properties of muscle. In non-muscle cells, seems to play a role in chromosome condensation and chromosome segregation during mitosis. Might link the lamina network to chromatin or nuclear actin, or both during interphase.<ref>PMID:9804419</ref> [[http://www.uniprot.org/uniprot/B2MG_HUMAN B2MG_HUMAN]] Component of the class I major histocompatibility complex (MHC). Involved in the presentation of peptide antigens to the immune system.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Natural T-cell responses generally lack the potency to eradicate cancer. Enhanced affinity T-cell receptors (TCRs) provide an ideal approach to target cancer cells, with emerging clinical data showing significant promise. Nevertheless, the risk of off target reactivity remains a key concern, as exemplified in a recent clinical report describing fatal cardiac toxicity, following administration of MAGE-A3 specific TCR-engineered T-cells, mediated through cross-reactivity with an unrelated epitope from the Titin protein presented on cardiac tissue. Here, we investigated the structural mechanism enabling TCR cross-recognition of MAGE-A3 and Titin, and applied the resulting data to rationally design mutants with improved antigen discrimination, providing a proof-of-concept strategy for altering the fine specificity of a TCR towards an intended target antigen. This study represents the first example of direct molecular mimicry leading to clinically relevant fatal toxicity, mediated by a modified enhanced affinity TCR designed for cancer immunotherapy. Furthermore, these data demonstrate that self-antigens that are expressed at high levels on healthy tissue should be treated with extreme caution when designing immuno-therapeutics.


Authors: Raman, M.C.C., Rizkallah, P.J., Simmons, R., Donellan, Z., Dukes, J., Bossi, G., LeProvost, G., Mahon, T., Hickman, E., Lomax, M., Oates, J., Hassan, N., Vuidepot, A., Sami, M., Cole, D.K., Jakobsen, B.K.
Direct molecular mimicry enables off-target cardiovascular toxicity by an enhanced affinity TCR designed for cancer immunotherapy.,Raman MC, Rizkallah PJ, Simmons R, Donnellan Z, Dukes J, Bossi G, Le Provost GS, Todorov P, Baston E, Hickman E, Mahon T, Hassan N, Vuidepot A, Sami M, Cole DK, Jakobsen BK Sci Rep. 2016 Jan 13;6:18851. doi: 10.1038/srep18851. PMID:26758806<ref>PMID:26758806</ref>


Description:  
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[Category: Unreleased Structures]]
</div>
[[Category: Vuidepot, A]]
<div class="pdbe-citations 5bs0" style="background-color:#fffaf0;"></div>
[[Category: Rizkallah, P.J]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Non-specific serine/threonine protein kinase]]
[[Category: Bossi, G]]
[[Category: Cole, D K]]
[[Category: Donellan, Z]]
[[Category: Dukes, J]]
[[Category: Hassan, N]]
[[Category: Hickman, E]]
[[Category: Jakobsen, B K]]
[[Category: LeProvost, G]]
[[Category: Lomax, M]]
[[Category: Mahon, T]]
[[Category: Oates, J]]
[[Category: Oates, J]]
[[Category: Donellan, Z]]
[[Category: Raman, M C.C]]
[[Category: Raman, M.C.C]]
[[Category: Rizkallah, P J]]
[[Category: Sami, M]]
[[Category: Sami, M]]
[[Category: Jakobsen, B.K]]
[[Category: Leprovost, G]]
[[Category: Simmons, R]]
[[Category: Simmons, R]]
[[Category: Hickman, E]]
[[Category: Vuidepot, A]]
[[Category: Mahon, T]]
[[Category: Immune system]]
[[Category: Dukes, J]]
[[Category: Immuno pmhc tcr titin]]
[[Category: Lomax, M]]
[[Category: Hassan, N]]
[[Category: Cole, D.K]]
[[Category: Bossi, G]]

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