A transducible nuclear/nucleolar protein, mLLP, regulates neuronal morphogenesis and synaptic transmission

Nam Kyung Yu, Hyoung F. Kim, Jaehoon Shim, Somi Kim, Dae Won Kim, Chuljung Kwak, Su Eon Sim, Jun Hyeok Choi, Seohee Ahn, Juyoun Yoo, Sun Lim Choi, Deok Jin Jang, Chae Seok Lim, Yong Seok Lee, Chulhun Kang, Soo Young Choi, Bong Kiun Kaang

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16 Scopus citations

Abstract

Cell-permeable proteins are emerging as unconventional regulators of signal transduction and providing a potential for therapeutic applications. However, only a few of them are identified and studied in detail. We identify a novel cell-permeable protein, mouse LLP homolog (mLLP), and uncover its roles in regulating neural development. We found that mLLP is strongly expressed in developing nervous system and that mLLP knockdown or overexpression during maturation of cultured neurons affected the neuronal growth and synaptic transmission. Interestingly, extracellular addition of mLLP protein enhanced dendritic arborization, demonstrating the non-cell-autonomous effect of mLLP. Moreover, mLLP interacts with CCCTC-binding factor (CTCF) as well as transcriptional machineries and modulates gene expression involved in neuronal growth. Together, these results illustrate the characteristics and roles of previously unknown cell-permeable protein mLLP in modulating neural development.

Original languageEnglish
Article number22892
JournalScientific Reports
Volume6
DOIs
StatePublished - 10 Mar 2016

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