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Biosciences Research Seminar - Evolutionary ecology of CRISPR-cas immune systems of bacteria

Part of the Biosciences lunchtime research seminar series

A Biosciences seminar
Date12 March 2020
Time12:30 to 13:30
PlaceLSI Seminar Room B

Swipe access required for LSI

Speaker: Professor Edze Westra, NERC Independent Research Fellow, Environment and Sustainability Institute, University of Exeter (Penryn) Host: Dr Nic Harmer. Seminar followed by shared buffet lunch.


CRISPR-Cas are adaptive immune systems of prokaryotes. In my lab, we study under what ecological conditions CRISPR-Cas immunity is favoured over mutation of the phage receptor and vice versa, and how these two mechanisms shape the population and coevolutionary dynamics of bacteria-phage interactions. In my talk I will also discuss conditions where carrying CRISPR-Cas systems is maladaptive (i.e. selected against), which may explain why approximately 60% of bacteria do not encode CRISPR-Cas immune systems.

Seminar_Series_poster_120320.pdf (248K)

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