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Division of labour between PP2A-B56 isoforms at the centromere and kinetochore

Vallardi, Giulia ; Allan, Lindsey A ; Crozier, Lisa ; Saurin, Adrian T

eLife, 2019-03, Vol.8 [Periódico revisado por pares]

England: eLife Science Publications, Ltd

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Título:
Division of labour between PP2A-B56 isoforms at the centromere and kinetochore
Autor: Vallardi, Giulia ; Allan, Lindsey A ; Crozier, Lisa ; Saurin, Adrian T
Assuntos: BUBR1 protein ; Cell Biology ; Cell Cycle Proteins - metabolism ; Cell division ; Cells (Biology) ; centromere ; Centromere - enzymology ; chromosome ; Chromosomes ; Cloning ; Division of labor ; Enzymes ; Genes ; Graphs ; HeLa Cells ; Humans ; Immunoglobulins ; Isoforms ; kinetochore ; Kinetochores - enzymology ; Localization ; Mitosis ; Multiprotein Complexes - metabolism ; Phosphatase ; Phosphatases ; Phosphates ; Protein Binding ; Protein Isoforms - metabolism ; Protein Multimerization ; Protein Phosphatase 2 - metabolism ; Protein Serine-Threonine Kinases - metabolism ; Protein-serine/threonine phosphatase ; Proteins ; Serine ; Threonine phosphatase ; Time
É parte de: eLife, 2019-03, Vol.8
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: PP2A-B56 is a serine/threonine phosphatase complex that regulates several major mitotic processes, including sister chromatid cohesion, kinetochore-microtubule attachment and the spindle assembly checkpoint. We show here that these key functions are divided between different B56 isoforms that localise to either the centromere or kinetochore. The centromeric isoforms rely on a specific interaction with Sgo2, whereas the kinetochore isoforms bind preferentially to BubR1 and other proteins containing an LxxIxE motif. In addition to these selective binding partners, Sgo1 helps to anchor PP2A-B56 at both locations: it collaborates with BubR1 to maintain B56 at the kinetochore and it helps to preserve the Sgo2/B56 complex at the centromere. A series of chimaeras were generated to map the critical region in B56 down to a small C-terminal loop that regulates the key interactions and defines B56 localisation. Together, this study describes how different PP2A-B56 complexes utilise isoform-specific interactions to control distinct processes during mitosis.
Editor: England: eLife Science Publications, Ltd
Idioma: Inglês

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Division of labour between PP2A-B56 isoforms at the centromere and kinetochore

Vallardi, Giulia ; Allan, Lindsey A ; Crozier, Lisa ; Saurin, Adrian T

England: eLife Science Publications, Ltd

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