Theranostics 2020; 10(9):3880-3891. doi:10.7150/thno.41383 This issue Cite

Research Paper

A novel function of Prohibitin on melanosome transport in melanocytes

Chan Song Jo*, Hye In Park*, Hyun Jin Jung, Jong il Park, Ji Eun Lee, Cheol Hwan Myung, Jae Sung Hwang

Department of Genetic Engineering & Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, Gyeonggi-do 446-701, Republic of Korea.
*These authors contributed equally to this work.

Citation:
Jo CS, Park HI, Jung HJ, Park Ji, Lee JE, Myung CH, Hwang JS. A novel function of Prohibitin on melanosome transport in melanocytes. Theranostics 2020; 10(9):3880-3891. doi:10.7150/thno.41383. https://www.thno.org/v10p3880.htm
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Abstract

Graphic abstract

Prohibitin (PHB, also known as PHB1 or BAP32), is a highly conserved 31kDa protein that expressed in many cellular compartments, such as mitochondria, nucleus, cytosol, and plasma membrane, and plays roles in regulating the transcription of genes, apoptosis, and mitochondrial biogenesis. There is a report that Prohibitin expression is required for the stimulation of pigmentation by melanogenin. However, no studies have been published on the function of PHB in melanocytes, especially in melanosome transport.

Methods: Immunofluorescence was performed to confirm the localization of PHB. siRNA transfections, Co-immunoprecipitation, western blotting and proximity ligation assay were performed to find binding state between proteins and demonstrate functions of PHB on melanosome transport.

Results: PHB is located in the melanosome and perinuclear aggregation of melanosome is induced when expression of PHB is reduced with no influence on melanin contents. PHB binds directly to Rab27a and Mlph but not Myosin-Va. Rab27a and Mlph bind to specific domains of PHB. Reduced expression of PHB led to the impaired binding affinity between Rab27a and Mlph.

Conclusion: PHB regulates melanosome transport by linking to Rab27a and Mlph in melanocytes. Targeting and regulating PHB not only manages pigmentation in melanocytes, but also controls hyperpigmentation in melanoma

Keywords: Prohibitin, melanosome transport, Rab27a, Melanophilin


Citation styles

APA
Jo, C.S., Park, H.I., Jung, H.J., Park, J.i., Lee, J.E., Myung, C.H., Hwang, J.S. (2020). A novel function of Prohibitin on melanosome transport in melanocytes. Theranostics, 10(9), 3880-3891. https://doi.org/10.7150/thno.41383.

ACS
Jo, C.S.; Park, H.I.; Jung, H.J.; Park, J.i.; Lee, J.E.; Myung, C.H.; Hwang, J.S. A novel function of Prohibitin on melanosome transport in melanocytes. Theranostics 2020, 10 (9), 3880-3891. DOI: 10.7150/thno.41383.

NLM
Jo CS, Park HI, Jung HJ, Park Ji, Lee JE, Myung CH, Hwang JS. A novel function of Prohibitin on melanosome transport in melanocytes. Theranostics 2020; 10(9):3880-3891. doi:10.7150/thno.41383. https://www.thno.org/v10p3880.htm

CSE
Jo CS, Park HI, Jung HJ, Park Ji, Lee JE, Myung CH, Hwang JS. 2020. A novel function of Prohibitin on melanosome transport in melanocytes. Theranostics. 10(9):3880-3891.

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