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Conformational Stability and Catalytic Activity of PTEN Variants Linked to Cancers and Autism Spectrum Disorders
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    Conformational Stability and Catalytic Activity of PTEN Variants Linked to Cancers and Autism Spectrum Disorders
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    † ‡ Department of Biochemistry and Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
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    Biochemistry

    Cite this: Biochemistry 2015, 54, 7, 1576–1582
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    https://doi.org/10.1021/acs.biochem.5b00028
    Published February 3, 2015
    Copyright © 2015 American Chemical Society

    Abstract

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    Phosphoinositides are membrane components that play critical regulatory roles in mammalian cells. The enzyme PTEN, which catalyzes the dephosphorylation of the phosphoinositide PIP3, is damaged in most sporadic tumors. Mutations in the PTEN gene have also been linked to autism spectrum disorders and other forms of delayed development. Here, human PTEN is shown to be on the cusp of unfolding under physiological conditions. Variants of human PTEN linked to somatic cancers and disorders on the autism spectrum are shown to be impaired in their conformational stability, catalytic activity, or both. Those variants linked only to autism have activity higher than the activity of those linked to cancers. PTEN-L, which is a secreted trans-active isoform, has conformational stability greater than that of the wild-type enzyme. These data indicate that PTEN is a fragile enzyme cast in a crucial role in cellular metabolism and suggest that PTEN-L is a repository for a critical catalytic activity.

    Copyright © 2015 American Chemical Society

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    This article is cited by 24 publications.

    1. Iris N. Smith, Jennifer E. Dawson, James Krieger, Stetson Thacker, Ivet Bahar, Charis Eng. Structural and Dynamic Effects of PTEN C-Terminal Tail Phosphorylation. Journal of Chemical Information and Modeling 2022, 62 (17) , 4175-4190. https://doi.org/10.1021/acs.jcim.2c00441
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    Biochemistry

    Cite this: Biochemistry 2015, 54, 7, 1576–1582
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.biochem.5b00028
    Published February 3, 2015
    Copyright © 2015 American Chemical Society

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