[Todos] Seminario en DF - Vincent Croquette (ENS): Martes 12/8, 11hs, Aula Seminario, Pab. I

Jue Ago 7 16:34:22 ART 2014

SEMINARIO EN EL DEPARTAMENTO DE FÃSICA FCEYN - UBA


                        En el Aula Seminario, 2do piso, PabellÃ³n I,

                        Martes 12/8, 11hs:

                        VINCENT CROQUETTE

                        Ecole Normale SupÃ©rieure.


*                        From the T4 replisome and its restart to DNA
sequencing: a single molecule study using magnetic tweezers*

 The replisome is a central element of any replication system and is
responsible for the separation and replication of the parent DNA strands.
The T4 bacteriophage system offers a simple model for replication. The
replisome is formed by the primosome (the helicase (gp41) and primase
(gp61) complex) and two holoenzymes (the polymerases (gp43) and their
accessory proteins). Many questions remain concerning these complexes,
including how the helicase, primase and polymerase activities and motions
are coupled. Here we use magnetic tweezers to manipulate a single tethered
DNA hairpin. The substrate extension is used as a real-time reporter of the
replisome-activity. We have studied the coupling between the helicase and
polymerase. We have also investigated how the UvsW helicase can restart a
stalled replication fork. Finally, starting from this fundamental research
we have design a new sequencing strategy.
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