Leucine-induced localization of Leucyl-tRNA synthetase in lysosome membrane. 2017

Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
BK21 Plus Program, Department of Senior Healthcare, Graduate School, Eulji University, South Korea.

Leucyl-tRNA synthetase (LRS) plays major roles in providing leucine-tRNA and activating mechanistic target of rapamycin complex 1 (mTORC1) through intracellular leucine sensing. mTORC1 activated by amino acids affects the influence on physiology functions including cell proliferation, protein synthesis and autophagy in various organisms. Biochemical results demonstrating leucine sensing have been published, but visual results are lacking. Therefore, we observed the location of LRS with and without leucine using stimulated emission depletion (STED) microscopy one of the super-resolution microscopy and transmission electron microscopy (TEM). This revealed that LRS was translocated to the lysosome on addition of leucine. The translocation was inhibited by treatment with compound BC-LI-0186, disrupting the interaction between RagD and LRS. Immuno-TEM revealed a clear decrease in LRS translocation to the lysosome on addition of the inhibitor. This direct visualization of leucine sensing and LRS translocation to the lysosome was related to mTORC1 activation. To study the relationship between mTORC1 activation and LRS translocation, we monitored the change in autophagy for each condition using TEM and CLSM. The results showed a decrease in autophagy on addition of leucine, demonstrating crosstalk between leucine sensing, LRS translocation, RagD interaction, and mTORC1 activation.

UI MeSH Term Description Entries
D007930 Leucine An essential branched-chain amino acid important for hemoglobin formation. L-Leucine,Leucine, L-Isomer,L-Isomer Leucine,Leucine, L Isomer
D007935 Leucine-tRNA Ligase An enzyme that activates leucine with its specific transfer RNA. EC 6.1.1.4. Leucyl T RNA Synthetase,Leu-tRNA Ligase,Leucine-tRNA Synthetase,Leu tRNA Ligase,Leucine tRNA Ligase,Leucine tRNA Synthetase,Ligase, Leu-tRNA,Ligase, Leucine-tRNA,Synthetase, Leucine-tRNA
D008247 Lysosomes A class of morphologically heterogeneous cytoplasmic particles in animal and plant tissues characterized by their content of hydrolytic enzymes and the structure-linked latency of these enzymes. The intracellular functions of lysosomes depend on their lytic potential. The single unit membrane of the lysosome acts as a barrier between the enzymes enclosed in the lysosome and the external substrate. The activity of the enzymes contained in lysosomes is limited or nil unless the vesicle in which they are enclosed is ruptured or undergoes MEMBRANE FUSION. (From Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed). Autolysosome,Autolysosomes,Lysosome
D006367 HeLa Cells The first continuously cultured human malignant CELL LINE, derived from the cervical carcinoma of Henrietta Lacks. These cells are used for, among other things, VIRUS CULTIVATION and PRECLINICAL DRUG EVALUATION assays. Cell, HeLa,Cells, HeLa,HeLa Cell
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000076222 Mechanistic Target of Rapamycin Complex 1 An evolutionarily conserved multiprotein complex that functions as a cellular energy sensor and regulator of protein synthesis for cell growth and proliferation. It consists of TOR SERINE-THREONINE KINASES; REGULATORY-ASSOCIATED PROTEIN OF MTOR (RAPTOR); MLST8 PROTEIN; and AKT1 substrate 1 protein. The activity of the complex is regulated by SIROLIMUS; INSULIN; GROWTH FACTORS; PHOSPHATIDIC ACIDS; some amino acids or amino acid derivatives, and OXIDATIVE STRESS. TOR Complex 1,TORC1,Target of Rapamycin Complex 1,mTORC1,mTORC1 Complex,Complex, mTORC1
D001343 Autophagy The segregation and degradation of various cytoplasmic constituents via engulfment by MULTIVESICULAR BODIES; VACUOLES; or AUTOPHAGOSOMES and their digestion by LYSOSOMES. It plays an important role in BIOLOGICAL METAMORPHOSIS and in the removal of bone by OSTEOCLASTS. Defective autophagy is associated with various diseases, including NEURODEGENERATIVE DISEASES and cancer. Autophagocytosis,ER-Phagy,Lipophagy,Nucleophagy,Reticulophagy,Ribophagy,Autophagy, Cellular,Cellular Autophagy,ER Phagy
D046912 Multiprotein Complexes Macromolecular complexes formed from the association of defined protein subunits. Macromolecular Protein Complexes,Complexes, Macromolecular Protein,Complexes, Multiprotein,Protein Complexes, Macromolecular
D052119 Lysosomal-Associated Membrane Protein 2 An abundant lysosomal-associated membrane protein that has been found to shuttle between LYSOSOMES; ENDOSOMES; and the PLASMA MEMBRANE. Loss of expression of lysosomal-associated membrane protein 2 is associated with GLYCOGEN STORAGE DISEASE TYPE IIB. Antigens, CD107b,CD107b Antigens,CD107b Antigen,LAMP2 Protein,LGP-B Protein,LGP110 Protein,LGP B Protein,Lysosomal Associated Membrane Protein 2
D057809 HEK293 Cells A cell line generated from human embryonic kidney cells that were transformed with human adenovirus type 5. 293T Cells,HEK 293 Cell Line,HEK 293 Cells,Human Embryonic Kidney Cell Line 293,Human Kidney Cell Line 293,293 Cell, HEK,293 Cells, HEK,293T Cell,Cell, 293T,Cell, HEK 293,Cell, HEK293,Cells, 293T,Cells, HEK 293,Cells, HEK293,HEK 293 Cell,HEK293 Cell

Related Publications

Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
February 1993, Biochemical and biophysical research communications,
Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
January 1973, Biochimie,
Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
December 1971, European journal of biochemistry,
Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
April 2021, Cell reports,
Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
January 2020, Science (New York, N.Y.),
Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
September 1967, Biochemical and biophysical research communications,
Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
April 2012, Cell,
Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
December 2006, Biochemistry,
Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
March 1976, Developmental biology,
Hyosun Choi, and Jung Bae Son, and Jooyoun Kang, and Jiwoong Kwon, and Jong Hyun Kim, and Minkyo Jung, and Seong Keun Kim, and Sunghoon Kim, and Ji Young Mun
April 2022, International journal of molecular sciences,
Copied contents to your clipboard!