Reduced endosomal microautophagy activity in aging associates with enhanced exocyst-mediated protein secretion
© 2022 The Authors. Aging Cell published by Anatomical Society and John Wiley & Sons Ltd..
Autophagy is essential for protein quality control and regulation of the functional proteome. Failure of autophagy pathways with age contributes to loss of proteostasis in aged organisms and accelerates the progression of age-related diseases. In this work, we show that activity of endosomal microautophagy (eMI), a selective type of autophagy occurring in late endosomes, declines with age and identify the sub-proteome affected by this loss of function. Proteomics of late endosomes from old mice revealed an aberrant glycation signature for Hsc70, the chaperone responsible for substrate targeting to eMI. Age-related Hsc70 glycation reduces its stability in late endosomes by favoring its organization into high molecular weight protein complexes and promoting its internalization/degradation inside late endosomes. Reduction of eMI with age associates with an increase in protein secretion, as late endosomes can release protein-loaded exosomes upon plasma membrane fusion. Our search for molecular mediators of the eMI/secretion switch identified the exocyst-RalA complex, known for its role in exocytosis, as a novel physiological eMI inhibitor that interacts with Hsc70 and acts directly at the late endosome membrane. This inhibitory function along with the higher exocyst-RalA complex levels detected in late endosomes from old mice could explain, at least in part, reduced eMI activity with age. Interaction of Hsc70 with components of the exocyst-RalA complex places this chaperone in the switch from eMI to secretion. Reduced intracellular degradation in favor of extracellular release of undegraded material with age may be relevant to the spreading of proteotoxicity associated with aging and progression of proteinopathies.
Medienart: |
E-Artikel |
---|
Erscheinungsjahr: |
2022 |
---|---|
Erschienen: |
2022 |
Enthalten in: |
Zur Gesamtaufnahme - volume:21 |
---|---|
Enthalten in: |
Aging cell - 21(2022), 10 vom: 01. Okt., Seite e13713 |
Sprache: |
Englisch |
---|
Beteiligte Personen: |
Krause, Gregory J [VerfasserIn] |
---|
Links: |
---|
Anmerkungen: |
Date Completed 19.10.2022 Date Revised 26.09.2023 published: Print-Electronic Citation Status MEDLINE |
---|
doi: |
10.1111/acel.13713 |
---|
funding: |
|
---|---|
Förderinstitution / Projekttitel: |
|
PPN (Katalog-ID): |
NLM346328586 |
---|
LEADER | 01000naa a22002652 4500 | ||
---|---|---|---|
001 | NLM346328586 | ||
003 | DE-627 | ||
005 | 20231226031157.0 | ||
007 | cr uuu---uuuuu | ||
008 | 231226s2022 xx |||||o 00| ||eng c | ||
024 | 7 | |a 10.1111/acel.13713 |2 doi | |
028 | 5 | 2 | |a pubmed24n1154.xml |
035 | |a (DE-627)NLM346328586 | ||
035 | |a (NLM)36116133 | ||
040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
041 | |a eng | ||
100 | 1 | |a Krause, Gregory J |e verfasserin |4 aut | |
245 | 1 | 0 | |a Reduced endosomal microautophagy activity in aging associates with enhanced exocyst-mediated protein secretion |
264 | 1 | |c 2022 | |
336 | |a Text |b txt |2 rdacontent | ||
337 | |a ƒaComputermedien |b c |2 rdamedia | ||
338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
500 | |a Date Completed 19.10.2022 | ||
500 | |a Date Revised 26.09.2023 | ||
500 | |a published: Print-Electronic | ||
500 | |a Citation Status MEDLINE | ||
520 | |a © 2022 The Authors. Aging Cell published by Anatomical Society and John Wiley & Sons Ltd. | ||
520 | |a Autophagy is essential for protein quality control and regulation of the functional proteome. Failure of autophagy pathways with age contributes to loss of proteostasis in aged organisms and accelerates the progression of age-related diseases. In this work, we show that activity of endosomal microautophagy (eMI), a selective type of autophagy occurring in late endosomes, declines with age and identify the sub-proteome affected by this loss of function. Proteomics of late endosomes from old mice revealed an aberrant glycation signature for Hsc70, the chaperone responsible for substrate targeting to eMI. Age-related Hsc70 glycation reduces its stability in late endosomes by favoring its organization into high molecular weight protein complexes and promoting its internalization/degradation inside late endosomes. Reduction of eMI with age associates with an increase in protein secretion, as late endosomes can release protein-loaded exosomes upon plasma membrane fusion. Our search for molecular mediators of the eMI/secretion switch identified the exocyst-RalA complex, known for its role in exocytosis, as a novel physiological eMI inhibitor that interacts with Hsc70 and acts directly at the late endosome membrane. This inhibitory function along with the higher exocyst-RalA complex levels detected in late endosomes from old mice could explain, at least in part, reduced eMI activity with age. Interaction of Hsc70 with components of the exocyst-RalA complex places this chaperone in the switch from eMI to secretion. Reduced intracellular degradation in favor of extracellular release of undegraded material with age may be relevant to the spreading of proteotoxicity associated with aging and progression of proteinopathies | ||
650 | 4 | |a Journal Article | |
650 | 4 | |a Research Support, Non-U.S. Gov't | |
650 | 4 | |a Research Support, N.I.H., Extramural | |
650 | 4 | |a aging | |
650 | 4 | |a autophagy | |
650 | 4 | |a chaperones | |
650 | 4 | |a endosomal microautophagy | |
650 | 4 | |a exocyst complex | |
650 | 4 | |a late endosomes | |
650 | 4 | |a protein secretion | |
650 | 4 | |a proteostasis | |
650 | 7 | |a Proteome |2 NLM | |
700 | 1 | |a Diaz, Antonio |e verfasserin |4 aut | |
700 | 1 | |a Jafari, Maryam |e verfasserin |4 aut | |
700 | 1 | |a Khawaja, Rabia R |e verfasserin |4 aut | |
700 | 1 | |a Agullo-Pascual, Esperanza |e verfasserin |4 aut | |
700 | 1 | |a Santiago-Fernández, Olaya |e verfasserin |4 aut | |
700 | 1 | |a Richards, Alicia L |e verfasserin |4 aut | |
700 | 1 | |a Chen, Kuei-Ho |e verfasserin |4 aut | |
700 | 1 | |a Dmitriev, Phillip |e verfasserin |4 aut | |
700 | 1 | |a Sun, Yan |e verfasserin |4 aut | |
700 | 1 | |a See, Stephanie K |e verfasserin |4 aut | |
700 | 1 | |a Abdelmohsen, Kotb |e verfasserin |4 aut | |
700 | 1 | |a Mazan-Mamczarz, Krystyna |e verfasserin |4 aut | |
700 | 1 | |a Krogan, Nevan J |e verfasserin |4 aut | |
700 | 1 | |a Gorospe, Myriam |e verfasserin |4 aut | |
700 | 1 | |a Swaney, Danielle L |e verfasserin |4 aut | |
700 | 1 | |a Sidoli, Simone |e verfasserin |4 aut | |
700 | 1 | |a Bravo-Cordero, Jose Javier |e verfasserin |4 aut | |
700 | 1 | |a Kampmann, Martin |e verfasserin |4 aut | |
700 | 1 | |a Cuervo, Ana Maria |e verfasserin |4 aut | |
773 | 0 | 8 | |i Enthalten in |t Aging cell |d 2002 |g 21(2022), 10 vom: 01. Okt., Seite e13713 |w (DE-627)NLM126391149 |x 1474-9726 |7 nnns |
773 | 1 | 8 | |g volume:21 |g year:2022 |g number:10 |g day:01 |g month:10 |g pages:e13713 |
856 | 4 | 0 | |u http://dx.doi.org/10.1111/acel.13713 |3 Volltext |
912 | |a GBV_USEFLAG_A | ||
912 | |a GBV_NLM | ||
951 | |a AR | ||
952 | |d 21 |j 2022 |e 10 |b 01 |c 10 |h e13713 |