MAN1 Restricts BMP Signaling During Synaptic Growth in Drosophila.

Abstract:

:Bone morphogenic protein (BMP) signaling is crucial for coordinated synaptic growth and plasticity. Here, we show that the nuclear LEM-domain protein MAN1 is a negative regulator of synaptic growth at Drosophila larval and adult neuromuscular junctions (NMJs). Loss of MAN1 is associated with synaptic structural defects, including floating T-bars, membrane attachment defects, and accumulation of vesicles between perisynaptic membranes and membranes of the subsynaptic reticulum. In addition, MAN1 mutants accumulate more heterogeneously sized vesicles and multivesicular bodies in larval and adult synapses, the latter indicating that MAN1 may function in synaptic vesicle recycling and endosome-to-lysosome trafficking. Synaptic overgrowth in MAN1 is sensitive to BMP signaling levels, and loss of key BMP components attenuate BMP-induced synaptic overgrowth. Based on these observations, we propose that MAN1 negatively regulates accumulation and distribution of BMP signaling components to ensure proper synaptic growth and integrity at larval and adult NMJs.

journal_name

Cell Mol Neurobiol

authors

Laugks U,Hieke M,Wagner N

doi

10.1007/s10571-016-0442-4

subject

Has Abstract

pub_date

2017-08-01 00:00:00

pages

1077-1093

issue

6

eissn

0272-4340

issn

1573-6830

pii

10.1007/s10571-016-0442-4

journal_volume

37

pub_type

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