RRC ID |
33167
|
Author |
Kim W, Kim HD, Jung Y, Kim J, Chung J.
|
Title |
Drosophila Low Temperature Viability Protein 1 (LTV1) Is Required for Ribosome Biogenesis and Cell Growth Downstream of Drosophila Myc (dMyc).
|
Journal |
J Biol Chem
|
Abstract |
During animal development, various signaling pathways converge to regulate cell growth. In this study, we identified LTV1 as a novel cell growth regulator in Drosophila. LTV1 mutant larvae exhibited developmental delays and lethality at the second larval stage. Using biochemical studies, we discovered that LTV1 interacted with ribosomal protein S3 and co-purified with free 40S ribosome subunits. We further demonstrated that LTV1 is crucial for ribosome biogenesis through 40S ribosome subunit synthesis and preribosomal RNA processing, suggesting that LTV1 is required for cell growth by regulating protein synthesis. We also demonstrated that Drosophila Myc (dMyc) directly regulates LTV1 transcription and requires LTV1 to stimulate ribosome biogenesis. Importantly, the loss of LTV1 blocked the cell growth and endoreplication induced by dMyc. Combined, these results suggest that LTV1 is a key downstream factor of dMyc-induced cell growth by properly maintaining ribosome biogenesis.
|
Volume |
290(21)
|
Pages |
13591-604
|
Published |
2015-5-22
|
DOI |
10.1074/jbc.M114.607036
|
PII |
S0021-9258(20)33714-5
|
PMID |
25858587
|
PMC |
PMC4505604
|
MeSH |
Animals
Animals, Genetically Modified / genetics
Animals, Genetically Modified / growth & development
Animals, Genetically Modified / metabolism*
Blotting, Northern
Cell Proliferation
Cells, Cultured
Chromatin Immunoprecipitation
Drosophila Proteins / genetics*
Drosophila Proteins / metabolism
Drosophila melanogaster / genetics
Drosophila melanogaster / growth & development
Drosophila melanogaster / metabolism*
Immunoenzyme Techniques
Microscopy, Electron
Protein Biosynthesis*
Proto-Oncogene Proteins c-myc / genetics
Proto-Oncogene Proteins c-myc / metabolism*
RNA, Messenger / genetics
Real-Time Polymerase Chain Reaction
Reverse Transcriptase Polymerase Chain Reaction
Ribosomes / genetics
Ribosomes / metabolism*
Temperature
|
IF |
4.238
|
Times Cited |
5
|
WOS Category
|
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
Resource |
Drosophila |
CG7686[CB-6202-3] (DGRC#123972) |