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Neutral endopeptidase is a myristoylated protein

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Abstract

Neutral endopeptidase (NEP) is a cell-surface peptidase normally expressed by prostate epithelial cells and lost in ~50% of primary prostate cancers. NEP directly associates with multiple proteins at the cell surface including Ezrin/Radixin/Moesin (ERM) proteins and the PTEN tumor suppressor protein. Analysis of the N-terminal sequence of the NEP cytosolic domain (N-terminal MGKSESQMDI TDINTPKPKK KQRWTR) identified a myristoylation consensus site. Mutation of Gly-2 to Arg significantly decreased 3H-myristoylation activity, and correlated with translocation of NEP from the plasma membrane to a perinuclear domain as demonstrated by immunofluorescence staining and Western blotting with an NEP-specific antibody. Removal of this myristoylation residue did not affect NEP enzymatic specific activity. Myristoylated NEP recruited more PTEN protein to the cell membrane fraction than unmyristoylated NEP. These data demonstrate that NEP is myristoylated at Gly-2 and that this modification is an intrinsic signal for membrane targeting.

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Acknowledgments

This work was supported by NIH grants RO1 DK060908-02, RO1 CA80240, R01 HD33000, the Robert H. McCooey Memorial Cancer Research Fund, Ronald and Susan Lynch Professorship in Urologic Oncology and Brady Urology Foundation of the Department of Urology (to Lee, J.). and DOD grant PC061655. The authors also thank Liza Lau and Samrina Kahlon for technical support.

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Authors and Affiliations

  1. Genitourinary Oncology Research Laboratory, The Division of Hematology and Medical Oncology, Department of Medicine, Weill Cornell Medical College of Cornell University, 520 E. 70th Street, ST-359, New York, NY, 10021, USA

    Rong Zheng, Akio Horiguchi, Katsuyuki Iida & David M. Nanus

  2. Department of Urology, Weill Cornell Medical College of Cornell University, New York, NY, 10021, USA

    Jungoo Lee & Ruoqian Shen

  3. Department of Clinical Oncology, Nevada Cancer Institute, One Breakthrough Way, Las Vegas, NV, 89135, USA

    Oscar B. Goodman Jr.

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  1. Rong Zheng
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  2. Akio Horiguchi
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  3. Katsuyuki Iida
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  4. Jungoo Lee
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  5. Ruoqian Shen
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  7. David M. Nanus
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Correspondence to David M. Nanus.

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Zheng, R., Horiguchi, A., Iida, K. et al. Neutral endopeptidase is a myristoylated protein. Mol Cell Biochem 335, 173–180 (2010). https://doi.org/10.1007/s11010-009-0253-8

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  • DOI: https://doi.org/10.1007/s11010-009-0253-8

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