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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:20260612T022539Z DTSTART;VALUE=DATE-TIME:20181010T130000 DTEND;VALUE=DATE-TIME:20181010T140000 SUMMARY:BMS Seminar: Temporal regulation of genome replication\, Dr Conra d Nieduszynski\, Dunn School of Pathology\, University of Oxford TZID:Europe/London UID:20181010-8a1785d765e801f30165ed29ff8c62d1@warwick.ac.uk CREATED:20181009T131600Z DESCRIPTION:Abstract: Accurate and complete genome replication is essenti al for all life. A single DNA replication error in a single cell divisio n can give rise to genomic disorders\, including cancer. Our research ai ms to determine how cells faithfully complete genome replication before cell division. DNA replication initiates at thousands of specific sites\ , called DNA replication origins\, distributed throughout the genome. Fa ithful completion of genome replication requires sufficient\, appropriat ely distributed origins to be activated (‘fired’). We aim to discover ho w the cell regulates the ‘firing’ of these origins? I will present two u npublished stories from the lab. First\, in mammalian cells\, 3D genome organisation is strongly predictive of replication timing. We have disru pted genome architecture\, via cohesin degradation\, and assessed the co nsequences for replication timing. In both asynchronous and synchronised cells we find that replication timing patterns do not depend upon intac t cohesin-mediated genome architecture. These surprising results suggest that cohesin-mediated genome architecture does not play a role in eithe r the establishment or maintenance of replication timing. Second\, we ha ve established single molecule methods for the study of DNA replication. Errors in DNA replication occur on single molecules in individual cells \; however these errors can be hidden from view in genomic approaches th at look at data from populations of several million cells. We have devel oped a sequencing method for the measurement of replication fork movemen t on single molecules. Using sequencing reads of 40-250 kb we have gener ate the first whole genome map of DNA replication dynamics at the single -molecule level. Our approach unmasks the heterogeneity of eukaryotic DN A replication - a critical step for investigating fork stalling and for the genomic characterisation of mammalian replication initiation. LOCATION:GLT3\, ÌÇÐÄTV Medical School CATEGORIES:BiomedicalSciences,DivisionalSeminars LAST-MODIFIED:20181009T131600Z ORGANIZER;CN=Jas Bains: END:VEVENT END:VCALENDAR