Volume 129, Issue 5 pp. 1298-1302
Zuschrift

The Mechanism of p53 Rescue by SUSP4

Do-Hyoung Kim

Do-Hyoung Kim

Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, 125, Gwahak-ro, Yuseong-gu, Daejeon, 34141 Korea

These authors contributed equally to this work.

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Dr. Chewook Lee

Dr. Chewook Lee

Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, 125, Gwahak-ro, Yuseong-gu, Daejeon, 34141 Korea

These authors contributed equally to this work.

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Dr. Si-Hyung Lee

Dr. Si-Hyung Lee

Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, 125, Gwahak-ro, Yuseong-gu, Daejeon, 34141 Korea

These authors contributed equally to this work.

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Prof. Kyung-Tae Kim

Prof. Kyung-Tae Kim

Molecular Epidemology Branch, Research Institute National Cancer Center, 323 Ilsandong-gu, Goyang-si, Gyeonggi-do, 10408 Korea

These authors contributed equally to this work.

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Joan J. Han

Joan J. Han

Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, 125, Gwahak-ro, Yuseong-gu, Daejeon, 34141 Korea

College of Human Medicine, Michigan State University, East Lansing, MI, 48824 USA

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Eun-Ji Cha

Eun-Ji Cha

Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, 125, Gwahak-ro, Yuseong-gu, Daejeon, 34141 Korea

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Ji-Eun Lim

Ji-Eun Lim

Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, 125, Gwahak-ro, Yuseong-gu, Daejeon, 34141 Korea

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Ye-Jin Cho

Ye-Jin Cho

Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, 125, Gwahak-ro, Yuseong-gu, Daejeon, 34141 Korea

Department of Bioinformatics, University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejoen, 34113 Korea

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Prof. Seung-Hee Hong

Prof. Seung-Hee Hong

Division of Food Science and Culinary Art, Food and Nutrition Major, Shinhan University, 95 Hoam-ro, Uijeongbu-si, Gyeonggi-do, 11644 Korea

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Dr. Kyou-Hoon Han

Corresponding Author

Dr. Kyou-Hoon Han

Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, 125, Gwahak-ro, Yuseong-gu, Daejeon, 34141 Korea

Department of Bioinformatics, University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejoen, 34113 Korea

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First published: 21 December 2016

Abstract

p53 is an important tumor-suppressor protein deactivation of which by mdm2 results in cancers. A SUMO-specific protease 4 (SUSP4) was shown to rescue p53 from mdm2-mediated deactivation, but the mechanism is unknown. The discovery by NMR spectroscopy of a “p53 rescue motif” in SUSP4 that disrupts p53-mdm2 binding is presented. This 29-residue motif is pre-populated with two transient helices connected by a hydrophobic linker. The helix at the C-terminus binds to the well-known p53-binding pocket in mdm2 whereas the N-terminal helix serves as an affinity enhancer. The hydrophobic linker binds to a previously unidentified hydrophobic crevice in mdm2. Overall, SUSP4 appears to use two synergizing modules, the p53 rescue motif described here and a globular-structured SUMO-binding catalytic domain, to stabilize p53. A p53 rescue motif peptide exhibits an anti-tumor activity in cancer cell lines expressing wild-type p53. A pre-structures motif in the intrinsically disordered proteins is thus important for target recognition.

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