Molecular characterization of a transport vesicle protein Neurensin-2, a homologue of Neurensin-1, expressed in neural cells

Brain Research
Katsuyuki NakanishiShigeru Taketani

Abstract

We have isolated and characterized a novel cDNA encoding a small neuronal membrane protein showing high sequence homology to Neuro-p24/Neurensin-1, a protein containing a microtubule-associated domain at the carboxyl-terminus and exclusively localized to small vesicles of neurons. The newly identified Neurensin-2 constitutes two-membrane spanning domains but not the microtubule-binding domain, with a molecular mass of 28 kDa. Neurensin-2 mRNA is expressed only in brain, whereas the protein expressed in various neurons including those of the thalamus/hypothalamus and hippocampus, of postnatally developing mice. While the levels of Neurensin-1 mRNA and protein in retinoic acid-exposed mouse neuroblastoma Neuro2a cells increased, those of Neurensin-2 mRNA and protein remained unchanged. When the Neurensin-2 cDNA was transfected into Neuro2a cells, Neurensin-2 was expressed in small vesicles including lysosomes in the perinuclear region. On the cotransfection of Neurensin-1 and -2 cDNA into Neuro2a cells, Neurensin-2 was mainly found in small vesicles of the cell body and Neurensin-1 in those of growth cones. In nerve growth factor-stimulated PC12 cells, the intracellular localization of these proteins also differed. Furthermore, i...Continue Reading

References

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Citations

Feb 12, 2009·American Journal of Medical Genetics. Part a·Sandrine LeclercqJean-Michel Dupont
Jul 21, 2010·Movement Disorders : Official Journal of the Movement Disorder Society·Antonetta M G SasVincenzo Bonifati
Sep 11, 2013·American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics : the Official Publication of the International Society of Psychiatric Genetics·Yu AnYiping Shen
Dec 3, 2016·Biomedicine & Pharmacotherapy = Biomédecine & Pharmacothérapie·Wenbin TangBin Li
Mar 15, 2018·Frontiers in Immunology·Jenna AndersonAli M Harandi
Mar 9, 2021·Taiwanese Journal of Obstetrics & Gynecology·Cem YenerFüsun Varol
Mar 21, 2021·Molecular Psychiatry·Gali UmschweifPaul Greengard
Sep 17, 2021·Cognitive Neuropsychology·Tina ThomasElena L Grigorenko

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