Article (Scientific journals)
Human-Specific ARHGAP11B Acts in Mitochondria to Expand Neocortical Progenitors by Glutaminolysis.
Namba, Takashi; Dóczi, Judit; Pinson, Anneline et al.
2020In Neuron, 105 (5), p. 867-881.e9
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Keywords :
3T3 Cells; Animals; Biological Evolution; Cell Proliferation/genetics; Citric Acid Cycle; GTPase-Activating Proteins/genetics/metabolism; Gene Expression Regulation, Developmental/genetics; Glutamic Acid/metabolism; Glutamine/metabolism; Humans; Mice; Mitochondria/metabolism; Mitochondrial ADP, ATP Translocases/metabolism; Mitochondrial Membrane Transport Proteins/metabolism; Mitochondrial Permeability Transition Pore; Neocortex/embryology/metabolism; Neural Stem Cells/metabolism; Neurogenesis/genetics; evolution; metabolism; neocortex; neural progenitor cells
Abstract :
[en] The human-specific gene ARHGAP11B is preferentially expressed in neural progenitors of fetal human neocortex and increases abundance and proliferation of basal progenitors (BPs), which have a key role in neocortex expansion. ARHGAP11B has therefore been implicated in the evolutionary expansion of the human neocortex, but its mode of action has been unknown. Here, we show that ARHGAP11B is imported into mitochondria, where it interacts with the adenine nucleotide translocase (ANT) and inhibits the mitochondrial permeability transition pore (mPTP). BP expansion by ARHGAP11B requires its presence in mitochondria, and pharmacological inhibition of ANT function or mPTP opening mimic BP expansion by ARHGAP11B. Searching for the underlying metabolic basis, we find that BP expansion by ARHGAP11B requires glutaminolysis, the conversion of glutamine to glutamate for the tricarboxylic acid (TCA) cycle. Hence, an ARHGAP11B-induced, mitochondria-based effect on BP metabolism that is a hallmark of highly mitotically active cells appears to underlie its role in neocortex expansion.
Disciplines :
Neurology
Author, co-author :
Namba, Takashi
Dóczi, Judit
Pinson, Anneline ;  Université de Liège - ULiège
Xing, Lei
Kalebic, Nereo
Wilsch-Bräuninger, Michaela
Long, Katherine R.
Vaid, Samir
Lauer, Janelle
Bogdanova, Aliona
Borgonovo, Barbara
Shevchenko, Anna
Keller, Patrick
Drechsel, David
Kurzchalia, Teymuras
Wimberger, Pauline
Chinopoulos, Christos
Huttner, Wieland B.
More authors (8 more) Less
Language :
English
Title :
Human-Specific ARHGAP11B Acts in Mitochondria to Expand Neocortical Progenitors by Glutaminolysis.
Publication date :
2020
Journal title :
Neuron
ISSN :
0896-6273
eISSN :
1097-4199
Publisher :
Cell Press, Cambridge, United States - Massachusetts
Volume :
105
Issue :
5
Pages :
867-881.e9
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright © 2019 Elsevier Inc. All rights reserved.
Available on ORBi :
since 16 January 2021

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