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DTSTART:19960101T000000 END:STANDARD BEGIN:STANDARD TZNAME:GMT TZOFFSETFROM:+0100 TZOFFSETTO:+0000 DTSTART:19961027T020000 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260506T204105Z DTSTART;VALUE=DATE-TIME:20231115T130000 DTEND;VALUE=DATE-TIME:20231115T140000 SUMMARY:BMS Seminar: In situ structures of muscle sarcomere and sarcomeri c proteins\, Professor Stefan Raunser\, Department of Structural Biochem istry\, Max Planck Institute of Molecular Physiology\, Germany TZID:Europe/London UID:20231115-8a1785d7898c299401899c9a1afa3d4a@warwick.ac.uk CREATED:20231110T120546Z DESCRIPTION:Abstract: Sarcomeres are force-generating and load-bearing de vices of muscles. A precise molecular picture of how sarcomeres are buil t underpins understanding their role in health and diseases. We determin ed the molecular architecture of native skeletal and cardiac sarcomeres and structures of sarcomeric proteins using cryo-focused-ion-beam millin g (cryo-FIB) and electron cryo-tomography (cryo-ET). Our three-dimension al reconstruction of the sarcomere reveals molecular details in the A-ba nd\, I-band and Z-disc and demonstrates the organisation of the thin and thick filaments and their cross-links [1\,2]. Our reconstruction of the thick filament reveals the three-dimensional organization of myosin hea ds and tails\, myosin-binding protein C (MyBP-C) and titin\, elucidating the structural basis for their interaction during muscle contraction [2 ]. Using sub-tomogram averaging\, we determined an in situ structure of a nebulous thin-filament-binding protein\, nebulin\, at 4.5 Ã… and demons trated the molecular mechanism underlying its role as a "molecular ruler "\, in stabilising thin filament and in regulating myosin binding [3]. W e also characterised the structure of a unique double-head myosin confor mation\, highlighting the inherent structural variability of myosin in m uscle [1]. References: [1] Wang\, Z\, Grange M et al. (2021)\, Cell. 184 \,2135-2150.613 [2] Tamborrini\, D et al. (2023)\, bioRxiv\, https://doi .org/10.1101/2023.04.11.536387 [3] Wang\, Z\, Grange M et al. (2022)\, S cience. 375\, eabn1934 doi: 10.1126/science.abn1934 Biography: Professor Stefan Raunser is a structural biologist whose research focuses on unde rstanding molecular mechanisms underlying cellular processes in the heal thy and diseased organism. He is Director of the Department of Structura l Biochemistry at the Max Planck institute of Molecular Physiology\, Adj unct Professor at Technical University Dortmund and Honorary Professor a t University of Duisburg-Essen. With his research group\, he uses a mult i-disciplinary approach\, including biochemical reconstitutions\, high-r esolution electron cryomicroscopy (cryo-EM) and electron cryotomography (cryo-ET) primarily to investigate the structure of macromolecular compl exes that play a crucial role in cell physiology\, with a particular emp hasis on toxin-mediated membrane permeation\, the molecular details of m uscle contraction and the dynamics of the eukaryotic cytoskeleton. A det ailed understanding of these processes is of great importance as they ul timately serve to develop pharmaceutical measures to combat disease. He has authored over 100 papers in the fields of structural and molecular b iology and has given over 200 lectures and seminars around the world. He is a scientific member of the Max Planck Society and an elected member of the North Rhine Westphalian Academy of Sciences and Arts\, the German National Academy of Sciences Leopoldina and EMBO. LOCATION:IBRB Lecture Theatre CATEGORIES:BiomedicalSciences,DivisionalSeminars LAST-MODIFIED:20231110T120546Z ORGANIZER;CN=Jas Bains: END:VEVENT END:VCALENDAR