Close

Phosphorylation controls spatial and temporal activities of motor-PRC1 complexes to complete mitosis

Agata Gluszek-Kustusz, Benjamin Craske, Thibault Legal, Toni McHugh, Julie P.I. Welburn

Preprint posted on 11 March 2023 https://www.biorxiv.org/content/10.1101/2023.03.11.531660v1

Article now published in The EMBO Journal at http://dx.doi.org/10.15252/embj.2023113647

Getting to the right place at the right time: Phosphorylation regulates jumping of kinesins between spindles during mitosis

Selected by Divya Pathak, Barbora Knotkova

Updated 5 November 2023 with a postLight by Divya Pathak, Barbora Knotkova

We were very excited to see the work by Julie Welburn and colleagues published recently in the EMBO Journal – Heartiest Congratulations! Our discussion of the preprint focused on how the preprint evolved into the published manuscript.

The manuscript has largely been published similar to the preprint uploaded without major changes, lending credence to the strength of the experimental techniques and conclusions by the authors. 

Two more experiments have been added to the manuscript in the final version. 

  1. Firstly, the authors investigated whether the mutation of the three key amino acids to alanine in PRC1-MEE construct changed its dimerization status and its ability to crosslink microtubules. Using Size exclusion, the authors checked whether the mutation to Alanine affected its ability to dimerize and found that the mutant PRC1-MEE construct could dimerize similarly to WT. This was much needed to ensure that the effect of the mutation didn’t alter dimerization and exerted its effect through CENP-E binding.
    They also used microscopy to test if the mutant PRC1-MEE retained its ability to crosslink microtubules and the mutant behaved similarly to WT.
  2. Secondly, they added a separate panel D in Figure 7 showing the localization of Kif4A during telophase. Earlier, the authors had shown how CENP-E localises to the furrow or the region of abscission. In this panel, they show that Kif4A also localises to the region of abscission, providing further evidence that Kif4A and CENP-E work in concert with Kif4A during cell division.

Background:

Mitosis is an essential biological process involving the division of one eukaryotic cell into two daughter cells. Genetic information encoded on chromosomes has to be copied and divided equally between the two daughter cells, in a well-choreographed, spatiotemporally regulated process that involves the coordination between multiple protein players. One of the key players in mitosis are microtubule filaments. Microtubules self-organise into three different structures during mitosis: 1) the bipolar mitotic spindle (in early mitosis) which attaches to kinetochores on chromosomes to pull them apart, 2) astral microtubules which mediate spindle positioning and 3) the central spindle which support cytokinesis in late mitosis [1] (Figure 1).

This preprint largely focuses on central spindle organisation during the metaphase to anaphase transition, which is mediated by microtubule-associated proteins and motor proteins. PRC1, a microtubule-associated protein, is the protagonist in central spindle formation. PRC1 functions as a homodimer of two 70kDa polypeptides. It’s central domain induces microtubule bundling while the N-terminal part of the protein interacts with the kinesin 4 motor Kif4A [2-4]. However, the exact molecular details underlying the interaction of PRC1 with motor proteins as well as their cooperation in central spindle assembly are not well characterised yet. Kif4A is responsible for the precise localization of PRC1 to the central region of the central spindle. However, the N-terminus of PRC1 has a broader functionality as full length PRC1 is restricted in its localization even after Kif4a depletion [5].

In this preprint Gluszek-Kustusz and colleagues uncover that two different motors – Kif4A and CENP-E – bind to PRC1 using a similar mechanism (hydrophobic motifs with reduced affinity upon phosphorylation) and address the role of mitotic kinases in spatiotemporally regulating the interaction between CENP-E and PRC1 during the metaphase-anaphase transition.

Fig 1: Schematic diagram showing the metaphase to anaphase transition, during which mitotic kinesins Kif4A (blue) and CENP-E (orange) relocate from kinetochores on chromosomes (pink) to PRC1 (black) on overlapping microtubules. (Adapted from preprint under CC-BY 4.0 International License)

 

Key findings:

  • There is a unifying theme for PRC1-motor protein interactions: CENP-E interacts with the N-terminal of PRC1 in a similar manner as Kif4A.By aligning the CENP-E protein sequences from various species, the authors identified hydrophobic motifs required for PRC1 binding present at the C-terminal region of the protein. Both KIF4A and CENP-E use two hydrophobic motifs to bind PRC1. Using an AlphaFold2 prediction, the CENP-E binding site at the N-terminus of PRC1 could be identified, and then experimentally confirmed.

 

  • The CENP-E-PRC1 complex, but neither of these proteins alone, was sufficient to slide microtubules in an in vitro assay, in the absence of other cytosolic proteins.

 

  • Phosphorylation of CENP-E inhibits its PRC1 binding and microtubule sliding.During (pro)metaphase, CENP-E localises to unattached kinetochores of chromosomes [6, 7] but rapidly changes its localisation to the central spindle in anaphase [8, 9]. This translocation from kinetochore to central spindle is accompanied by rapid dephosphorylation of CENP-E, which is phosphorylated in metaphase. Gluszek-Kustusz and colleagues identified the key serine residues flanking the hydrophobic PRC1 binding motifs whose dephosphorylation increases CENP-E’s affinity for PRC1. CENP-E phosphomimetic mutants therefore lost localisation to interpolar microtubules during metaphase, and to the midzone during anaphase. Phosphodead mutants on the other hand were still able to bind to overlapping microtubules at the midzone.

 

  • PCR1-motor interactions are necessary for cytokinesis.To investigate the importance of PRC1-CENP-E interaction in mitosis, Gluszek-Kustusz and team generated new HeLa cell lines expressing GFP-tagged PRC1 with or without mutations in the CENP-E binding site. At the same time, endogenous PRC1 could be inducibly knocked-out. While cells with GFP-PRC1 behaved like wild-type, the mutant GFP-PRC1 cells lacked a proper central spindle, CENP-E did not localise to the midzone and chromosomes were hypersegregated. This phenotype is similar to cells depleted for PRC1 [10]. As time progressed, cells containing only the mutant PRC1 became more polyploid than the control cells, indicating that recruitment of motor proteins to PRC1 is essential for proper cytokinesis.
Fig 2: (A) Cartoon representation of the experimental setup of in vitro microtubule sliding assay. (B) Representative kymograph depicting microtubule-microtubule sliding with 2.5 nM PRC1 and 50 nM full-length CENP-E (X-axis represents distance and Y-axis represents time). (C) An example kymograph showing free microtubule sliding until it stalls upon reaching the end of the immobilized microtubule. Once the “purple” microtubule reaches the end of the “yellow” microtubule, it stalls. (D) Graph shows quantified velocities of 28 microtubules. (Adapted from the preprint under CC-BY 4.0 International License)

 

 

What we like about the preprint: 

This is the first study uncovering the key molecular mechanism that mediates the switching of CENP-E from kinetochores in the mitotic spindle to the midzone of the central spindle during the metaphase to anaphase transition.

We liked that the manuscript was very clear and logical, and easy for us (non-experts in the field) to follow. Scientifically, we especially enjoyed how the authors could figure out molecular details, including regulations through post-translational modifications, underlying an important protein-protein interaction. We also recognise the effort of proving the principles initially found in vitro, in live cells.

 

Questions for the authors:

  1. Is it known if CENP-E phosphorylation is required for its association with kinetochores during metaphase, or is phosphorylation used just to inhibit PRC1 interaction?
  2. Do CENP-E and KIF4A compete for PRC1 binding – does the PRC11-168 mutation also inhibit binding to KifA4? Do CENP-E and KIF4A perform redundant functions during anaphase in sliding antiparallel microtubules?
  3. Are Kif4A and CENP-E under regulation by the same protein kinase? Or are they phosphorylated/dephosphorylated at different times during mitosis to prevent competition?
  4. What’s the role of Aurora kinases and BubR1 kinases as they switch regulating CENP-E spatiotemporally?

 

REFERENCES: 

  1.         Glotzer, M., The 3Ms of central spindle assembly: microtubules, motors and MAPs. Nat Rev Mol Cell Biol, 2009. 10(1): p. 9-20.
  2.         Bieling, P., I.A. Telley, and T. Surrey, A minimal midzone protein module controls formation and length of antiparallel microtubule overlaps. Cell, 2010. 142(3): p. 420-32.
  3.         Subramanian, R., et al., Insights into antiparallel microtubule crosslinking by PRC1, a conserved nonmotor microtubule binding protein. Cell, 2010. 142(3): p. 433-43.
  4.         Douglas, M.E. and M. Mishima, Still entangled: assembly of the central spindle by multiple microtubule modulators. Semin Cell Dev Biol, 2010. 21(9): p. 899-908.
  5.         Zhu, C. and W. Jiang, Cell cycle-dependent translocation of PRC1 on the spindle by Kif4 is essential for midzone formation and cytokinesis. Proc Natl Acad Sci U S A, 2005. 102(2): p. 343-8.
  6.         Cooke, C.A., et al., Localization of CENP-E in the fibrous corona and outer plate of mammalian kinetochores from prometaphase through anaphase. Chromosoma, 1997. 106(7): p. 446-55.
  7.         Yen, T.J., et al., CENP-E, a novel human centromere-associated protein required for progression from metaphase to anaphase. EMBO J, 1991. 10(5): p. 1245-54.
  8.         Kurasawa, Y., et al., Essential roles of KIF4 and its binding partner PRC1 in organized central spindle midzone formation. EMBO J, 2004. 23(16): p. 3237-48.
  9.         Yao, X., K.L. Anderson, and D.W. Cleveland, The microtubule-dependent motor centromere-associated protein E (CENP-E) is an integral component of kinetochore corona fibers that link centromeres to spindle microtubules. J Cell Biol, 1997. 139(2): p. 435-47.
  10.       Pamula, M.C., et al., High-resolution imaging reveals how the spindle midzone impacts chromosome movement. J Cell Biol, 2019. 218(8): p. 2529-2544.

 

 

Tags: cell division, cenp-e, centromere, kinesin, mitosis

Posted on: 6 May 2023 , updated on: 5 November 2023

doi: https://doi.org/10.1242/prelights.34561

Read preprint (No Ratings Yet)

Author's response

The author team shared

Is it known if CENP-E phosphorylation is required for its association with kinetochores during metaphase, or is phosphorylation used just to inhibit PRC1 interaction?

CENP-E is a large molecule. The kinetochore domain (2055-2608 in humans) itself is not phosphorylated and so no phosphorylation on this domain is required for association with the kinetochore. However, Mps1 kinase detects unattached kinetochores and is highly active at kinetochores under these circumstances. Mps1 activity is required to assemble the outer corona, a fibrous structure at the outer kinetochore which CENP-E localizes to, to help microtubule capture. Thus, phosphorylation is important for CENP-E association with kinetochores, but no phosphorylation of CENP-E C-terminus has been shown to play a role in this so far.
Phosphorylation of the C terminus only inhibits its interaction with PRC1.

Do CENP-E and KIF4A compete for PRC1 binding – does the PRC11-168 mutation also inhibit binding to KifA4? Do CENP-E and KIF4A perform redundant functions during anaphase in sliding antiparallel microtubules?

All very interesting questions that we also would like to address! Both proteins use the same motif to bind the N terminus of PRC1 so competition for PRC1 binding is possible.

Are Kif4A and CENP-E under regulation by the same protein kinase? Or are they phosphorylated/dephosphorylated at different times during mitosis to prevent competition?

We have not particularly compared the regulation by phosphorylation of Kif4A and CENP-E. Both proteins are phosphorylated by Aurora A and CDK1 and likely dephosphorylated at the metaphase to anaphase transition. Aurora A phosphorylates Kif4A to help chromosome congression (Poser et al, 2019, 10.1083/jcb.201905194) while CDK promotes Kif4A association with chromosomes in early mitosis (10.1093/jmcb/mjy033). Both localize to the central spindle and midbody but we do not know if they compete there or not.

What’s the role of Aurora kinases and BubR1 kinases as they switch regulating CENP-E spatiotemporally?

BubR1 a spindle assembly checkpoint protein and is a pseudokinase-it does not display any kinase activity. It binds to Knl1 at unattached kinetochores in an Mps1 kinase dependent fashion. This recruits CENP-E which tries to capture microtubules but also other proteins important for kinetochore signalling and attachments.

Aurora B kinase seems to mildly reduce CENP-E levels at the outer kinetochore and corona but the localization of CENP-E quite heterogenous at kinetochores. So we currently don’t understand the role of Aurora B activity on CENP-E targeting to kinetochores. Aurora B is also present at the central spindle and midbody, where it is transported by MKLP2. It is possible it phosphorylates CENP-E there to tune its affinity for PRC1.

The spatio-temporal switch is also driven by other mitotic kinases. At metaphase, Mps1 kinase activity decreases, which reduces CENP-E association with the kinetochore. At the metaphase to anaphase transition, CDK activity drops and CENP-E is dephosphorylated. This drives the increase in affinity of CENP-E for PRC1.

Have your say

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Sign up to customise the site to your preferences and to receive alerts

Register here

preLists in the biochemistry category:

BSCB-Biochemical Society 2024 Cell Migration meeting

This preList features preprints that were discussed and presented during the BSCB-Biochemical Society 2024 Cell Migration meeting in Birmingham, UK in April 2024. Kindly put together by Sara Morais da Silva, Reviews Editor at Journal of Cell Science.

 



List by Reinier Prosee

Preprint Peer Review – Biochemistry Course at UFRJ, Brazil

Communication of scientific knowledge has changed dramatically in recent decades and the public perception of scientific discoveries depends on the peer review process of articles published in scientific journals. Preprints are key vehicles for the dissemination of scientific discoveries, but they are still not properly recognized by the scientific community since peer review is very limited. On the other hand, peer review is very heterogeneous and a fundamental aspect to improve it is to train young scientists on how to think critically and how to evaluate scientific knowledge in a professional way. Thus, this course aims to: i) train students on how to perform peer review of scientific manuscripts in a professional manner; ii) develop students' critical thinking; iii) contribute to the appreciation of preprints as important vehicles for the dissemination of scientific knowledge without restrictions; iv) contribute to the development of students' curricula, as their opinions will be published and indexed on the preLights platform. The evaluations will be based on qualitative analyses of the oral presentations of preprints in the field of biochemistry deposited in the bioRxiv server, of the critical reports written by the students, as well as of the participation of the students during the preprints discussions.

 



List by Marcus Oliveira

CellBio 2022 – An ASCB/EMBO Meeting

This preLists features preprints that were discussed and presented during the CellBio 2022 meeting in Washington, DC in December 2022.

 



List by Nadja Hümpfer et al.

20th “Genetics Workshops in Hungary”, Szeged (25th, September)

In this annual conference, Hungarian geneticists, biochemists and biotechnologists presented their works. Link: http://group.szbk.u-szeged.hu/minikonf/archive/prg2021.pdf

 



List by Nándor Lipták

Fibroblasts

The advances in fibroblast biology preList explores the recent discoveries and preprints of the fibroblast world. Get ready to immerse yourself with this list created for fibroblasts aficionados and lovers, and beyond. Here, my goal is to include preprints of fibroblast biology, heterogeneity, fate, extracellular matrix, behavior, topography, single-cell atlases, spatial transcriptomics, and their matrix!

 



List by Osvaldo Contreras

ASCB EMBO Annual Meeting 2019

A collection of preprints presented at the 2019 ASCB EMBO Meeting in Washington, DC (December 7-11)

 



List by Madhuja Samaddar et al.

EMBL Seeing is Believing – Imaging the Molecular Processes of Life

Preprints discussed at the 2019 edition of Seeing is Believing, at EMBL Heidelberg from the 9th-12th October 2019

 



List by Dey Lab

Cellular metabolism

A curated list of preprints related to cellular metabolism at Biorxiv by Pablo Ranea Robles from the Prelights community. Special interest on lipid metabolism, peroxisomes and mitochondria.

 



List by Pablo Ranea Robles

MitoList

This list of preprints is focused on work expanding our knowledge on mitochondria in any organism, tissue or cell type, from the normal biology to the pathology.

 



List by Sandra Franco Iborra

Also in the cell biology category:

BSCB-Biochemical Society 2024 Cell Migration meeting

This preList features preprints that were discussed and presented during the BSCB-Biochemical Society 2024 Cell Migration meeting in Birmingham, UK in April 2024. Kindly put together by Sara Morais da Silva, Reviews Editor at Journal of Cell Science.

 



List by Reinier Prosee

‘In preprints’ from Development 2022-2023

A list of the preprints featured in Development's 'In preprints' articles between 2022-2023

 



List by Alex Eve, Katherine Brown

preLights peer support – preprints of interest

This is a preprint repository to organise the preprints and preLights covered through the 'preLights peer support' initiative.

 



List by preLights peer support

The Society for Developmental Biology 82nd Annual Meeting

This preList is made up of the preprints discussed during the Society for Developmental Biology 82nd Annual Meeting that took place in Chicago in July 2023.

 



List by Joyce Yu, Katherine Brown

CSHL 87th Symposium: Stem Cells

Preprints mentioned by speakers at the #CSHLsymp23

 



List by Alex Eve

Journal of Cell Science meeting ‘Imaging Cell Dynamics’

This preList highlights the preprints discussed at the JCS meeting 'Imaging Cell Dynamics'. The meeting was held from 14 - 17 May 2023 in Lisbon, Portugal and was organised by Erika Holzbaur, Jennifer Lippincott-Schwartz, Rob Parton and Michael Way.

 



List by Helen Zenner

9th International Symposium on the Biology of Vertebrate Sex Determination

This preList contains preprints discussed during the 9th International Symposium on the Biology of Vertebrate Sex Determination. This conference was held in Kona, Hawaii from April 17th to 21st 2023.

 



List by Martin Estermann

Alumni picks – preLights 5th Birthday

This preList contains preprints that were picked and highlighted by preLights Alumni - an initiative that was set up to mark preLights 5th birthday. More entries will follow throughout February and March 2023.

 



List by Sergio Menchero et al.

CellBio 2022 – An ASCB/EMBO Meeting

This preLists features preprints that were discussed and presented during the CellBio 2022 meeting in Washington, DC in December 2022.

 



List by Nadja Hümpfer et al.

Fibroblasts

The advances in fibroblast biology preList explores the recent discoveries and preprints of the fibroblast world. Get ready to immerse yourself with this list created for fibroblasts aficionados and lovers, and beyond. Here, my goal is to include preprints of fibroblast biology, heterogeneity, fate, extracellular matrix, behavior, topography, single-cell atlases, spatial transcriptomics, and their matrix!

 



List by Osvaldo Contreras

EMBL Synthetic Morphogenesis: From Gene Circuits to Tissue Architecture (2021)

A list of preprints mentioned at the #EESmorphoG virtual meeting in 2021.

 



List by Alex Eve

FENS 2020

A collection of preprints presented during the virtual meeting of the Federation of European Neuroscience Societies (FENS) in 2020

 



List by Ana Dorrego-Rivas

Planar Cell Polarity – PCP

This preList contains preprints about the latest findings on Planar Cell Polarity (PCP) in various model organisms at the molecular, cellular and tissue levels.

 



List by Ana Dorrego-Rivas

BioMalPar XVI: Biology and Pathology of the Malaria Parasite

[under construction] Preprints presented at the (fully virtual) EMBL BioMalPar XVI, 17-18 May 2020 #emblmalaria

 



List by Dey Lab, Samantha Seah

1

Cell Polarity

Recent research from the field of cell polarity is summarized in this list of preprints. It comprises of studies focusing on various forms of cell polarity ranging from epithelial polarity, planar cell polarity to front-to-rear polarity.

 



List by Yamini Ravichandran

TAGC 2020

Preprints recently presented at the virtual Allied Genetics Conference, April 22-26, 2020. #TAGC20

 



List by Maiko Kitaoka et al.

3D Gastruloids

A curated list of preprints related to Gastruloids (in vitro models of early development obtained by 3D aggregation of embryonic cells). Updated until July 2021.

 



List by Paul Gerald L. Sanchez and Stefano Vianello

ECFG15 – Fungal biology

Preprints presented at 15th European Conference on Fungal Genetics 17-20 February 2020 Rome

 



List by Hiral Shah

ASCB EMBO Annual Meeting 2019

A collection of preprints presented at the 2019 ASCB EMBO Meeting in Washington, DC (December 7-11)

 



List by Madhuja Samaddar et al.

EMBL Seeing is Believing – Imaging the Molecular Processes of Life

Preprints discussed at the 2019 edition of Seeing is Believing, at EMBL Heidelberg from the 9th-12th October 2019

 



List by Dey Lab

Autophagy

Preprints on autophagy and lysosomal degradation and its role in neurodegeneration and disease. Includes molecular mechanisms, upstream signalling and regulation as well as studies on pharmaceutical interventions to upregulate the process.

 



List by Sandra Malmgren Hill

Lung Disease and Regeneration

This preprint list compiles highlights from the field of lung biology.

 



List by Rob Hynds

Cellular metabolism

A curated list of preprints related to cellular metabolism at Biorxiv by Pablo Ranea Robles from the Prelights community. Special interest on lipid metabolism, peroxisomes and mitochondria.

 



List by Pablo Ranea Robles

BSCB/BSDB Annual Meeting 2019

Preprints presented at the BSCB/BSDB Annual Meeting 2019

 



List by Dey Lab

MitoList

This list of preprints is focused on work expanding our knowledge on mitochondria in any organism, tissue or cell type, from the normal biology to the pathology.

 



List by Sandra Franco Iborra

ASCB/EMBO Annual Meeting 2018

This list relates to preprints that were discussed at the recent ASCB conference.

 



List by Dey Lab, Amanda Haage
Close