MatP regulates the coordinated action of topoisomerase IV and MukBEF in chromosome segregation

Sophie Nolivos, Amy L. Upton, Anjana Badrinarayanan, Julius Müller, Katarzyna Zawadzka, Jakub Wiktor, Amber Gill, Lidia Arciszewska, Emilien Nicolas and David Sherratt ()
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Sophie Nolivos: University of Oxford
Amy L. Upton: University of Oxford
Anjana Badrinarayanan: University of Oxford
Julius Müller: The Jenner Institute, University of Oxford
Katarzyna Zawadzka: University of Oxford
Jakub Wiktor: University of Oxford
Amber Gill: University of Oxford
Lidia Arciszewska: University of Oxford
Emilien Nicolas: University of Oxford
David Sherratt: University of Oxford

Nature Communications, 2016, vol. 7, issue 1, 1-12

Abstract: Abstract The Escherichia coli SMC complex, MukBEF, forms clusters of molecules that interact with the decatenase topisomerase IV and which are normally associated with the chromosome replication origin region (ori). Here we demonstrate an additional ATP-hydrolysis-dependent association of MukBEF with the replication termination region (ter). Consistent with this, MukBEF interacts with MatP, which binds matS sites in ter. MatP displaces wild-type MukBEF complexes from ter, thereby facilitating their association with ori, and limiting the availability of topoisomerase IV (TopoIV) at ter. Displacement of MukBEF is impaired when MukB ATP hydrolysis is compromised and when MatP is absent, leading to a stable association of ter and MukBEF. Impairing the TopoIV-MukBEF interaction delays sister ter segregation in cells lacking MatP. We propose that the interplay between MukBEF and MatP directs chromosome organization in relation to MukBEF clusters and associated topisomerase IV, thereby ensuring timely chromosome unlinking and segregation.

Date: 2016
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DOI: 10.1038/ncomms10466

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