Significant decrease of ADP release rate underlies the potent activity of dimethylenastron to inhibit mitotic kinesin Eg5 and cancer cell proliferation

Sun, Linlin; Sun, Xiaodong; Xie, Songbo; Yu, Haiyang; Zhong, Diansheng

doi:10.1016/J.BBRC.2014.04.023

Title: Significant decrease of ADP release rate underlies the potent activity of dimethylenastron to inhibit mitotic kinesin Eg5 and cancer cell proliferation

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Abstract

Highlights: • DIMEN displays higher anti-proliferative activity than enastron. • DIMEN induced mitotic arrest and apoptosis more significantly than enastron. • DIMEN blocked the conformational change of ADP-binding pocket more effectively. • DIMEN hindered ADP release more potently than enastron. - Abstract: Eg5 is a mitotic kinesin that plays a crucial role in the formation of bipolar mitotic spindles, by hydrolyzing ATP to push apart anti-parallel microtubules. Dimethylenastron is potent specific small molecule inhibitor of Eg5. The mechanism by which dimethylenastron inhibits Eg5 function remains unclear. By comparing with enastron, here we report that dimethylenastron prevents the growth of pancreatic and lung cancer cells more effectively, by halting mitotic progression and triggering apoptosis. We analyze their interactions with ADP-bound Eg5 crystal structure, and find that dimethylenastron binds Eg5 motor domain with higher affinity. In addition, dimethylenastron allosterically blocks the conformational change of the “sandwich”-like ADP-binding pocket more effectively. We subsequently use biochemical approach to reveal that dimethylenastron slows ADP release more significantly than enastron. These data thus provide biological, structural and mechanistic insights into the potent inhibitory activity of dimethylenastron.

Authors:

Sun, Linlin ^[1]; Sun, Xiaodong; Xie, Songbo; Yu, Haiyang ^[2]; Zhong, Diansheng ^[1]

Lung Cancer Institute, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052 (China)
Department of Genetics and Cell Biology, College of Life Sciences, Nankai University, 94 Weijin Road, Tianjin 300071 (China)

Publication Date:: Fri May 09 00:00:00 EDT 2014

OSTI Identifier:: 22416425

Resource Type:: Journal Article

Journal Name:: Biochemical and Biophysical Research Communications

Additional Journal Information:: Journal Volume: 447; Journal Issue: 3; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0006-291X

Country of Publication:: United States

Language:: English

Subject:: 60 APPLIED LIFE SCIENCES; ADP; AFFINITY; APOPTOSIS; ATP; CELL PROLIFERATION; COMPARATIVE EVALUATIONS; CONFORMATIONAL CHANGES; LUNGS; MICROTUBULES; MOLECULES; NEOPLASMS; PANCREAS

Citation Formats


                    Sun, Linlin, Sun, Xiaodong, Xie, Songbo, Yu, Haiyang, Zhong, Diansheng, and Department of Oncology, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052. Significant decrease of ADP release rate underlies the potent activity of dimethylenastron to inhibit mitotic kinesin Eg5 and cancer cell proliferation.  United States: N. p., 2014. 
        Web.  doi:10.1016/J.BBRC.2014.04.023.

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                    Sun, Linlin, Sun, Xiaodong, Xie, Songbo, Yu, Haiyang, Zhong, Diansheng, & Department of Oncology, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052. Significant decrease of ADP release rate underlies the potent activity of dimethylenastron to inhibit mitotic kinesin Eg5 and cancer cell proliferation.  United States.  https://doi.org/10.1016/J.BBRC.2014.04.023

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                    Sun, Linlin, Sun, Xiaodong, Xie, Songbo, Yu, Haiyang, Zhong, Diansheng, and Department of Oncology, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052. 2014.  
        "Significant decrease of ADP release rate underlies the potent activity of dimethylenastron to inhibit mitotic kinesin Eg5 and cancer cell proliferation".  United States.  https://doi.org/10.1016/J.BBRC.2014.04.023.

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@article{osti_22416425,

  title        = {Significant decrease of ADP release rate underlies the potent activity of dimethylenastron to inhibit mitotic kinesin Eg5 and cancer cell proliferation},

  author       = {Sun, Linlin and Sun, Xiaodong and Xie, Songbo and Yu, Haiyang and Zhong, Diansheng and Department of Oncology, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin 300052},

  abstractNote = {Highlights: • DIMEN displays higher anti-proliferative activity than enastron. • DIMEN induced mitotic arrest and apoptosis more significantly than enastron. • DIMEN blocked the conformational change of ADP-binding pocket more effectively. • DIMEN hindered ADP release more potently than enastron. - Abstract: Eg5 is a mitotic kinesin that plays a crucial role in the formation of bipolar mitotic spindles, by hydrolyzing ATP to push apart anti-parallel microtubules. Dimethylenastron is potent specific small molecule inhibitor of Eg5. The mechanism by which dimethylenastron inhibits Eg5 function remains unclear. By comparing with enastron, here we report that dimethylenastron prevents the growth of pancreatic and lung cancer cells more effectively, by halting mitotic progression and triggering apoptosis. We analyze their interactions with ADP-bound Eg5 crystal structure, and find that dimethylenastron binds Eg5 motor domain with higher affinity. In addition, dimethylenastron allosterically blocks the conformational change of the “sandwich”-like ADP-binding pocket more effectively. We subsequently use biochemical approach to reveal that dimethylenastron slows ADP release more significantly than enastron. These data thus provide biological, structural and mechanistic insights into the potent inhibitory activity of dimethylenastron.},

  doi          = {10.1016/J.BBRC.2014.04.023},

  url          = {https://www.osti.gov/biblio/22416425},
  journal      = {Biochemical and Biophysical Research Communications},

  issn         = {0006-291X},

  number       = 3,

  volume       = 447,

  place        = {United States},

  year         = {Fri May 09 00:00:00 EDT 2014},

  month        = {Fri May 09 00:00:00 EDT 2014}

}

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