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NME4/nucleoside diphosphate kinase D in cardiolipin signaling and mitophagy
- Source :
- Laboratory Investigation, Laboratory Investigation, Nature Publishing Group, 2017, 98 (2), pp.228-232. ⟨10.1038/labinvest.2017.113⟩, Laboratory Investigation, Nature Publishing Group, 2018, 98 (2), pp.228-232. ⟨10.1038/labinvest.2017.113⟩, Laboratory Investigation, 2018, 98 (2), pp.228-232. ⟨10.1038/labinvest.2017.113⟩
- Publication Year :
- 2017
- Publisher :
- HAL CCSD, 2017.
-
Abstract
- International audience; Mitophagy is an emerging paradigm for mitochondrial quality control and cell homeostasis. Dysregulation of mitophagy can lead to human pathologies such as neurodegenerative disorders and contributes to the aging process. Complex protein signaling cascades have been described that regulate mitophagy. We have identified a novel lipid signaling pathway that involves the phospholipid cardiolipin (CL). CL is synthesized and normally confined at the inner mitochondrial membrane. However, upon a mitophagic trigger, ie, collapse of the inner membrane potential, CL is rapidly externalized to the mitochondrial surface with the assistance of the hexameric nucleoside diphosphate kinase D (NME4, NDPK-D, or NM23-H4). In addition to its NDP kinase activity, NME4/NDPK-D shows intermembrane phospholipid transfer activity in vitro and in cellular systems, which relies on NME4/NDPK-D interaction with CL, CL-dependent crosslinking of inner and outer mitochondrial membranes by symmetrical, hexameric NME4/NDPK-D, and a putative NME4/NDPK-D-based CL-transfer pathway. CL exposed at the mitochondrial surface then serves as an 'eat me' signal for the mitophagic machinery; it is recognized by the LC3 receptor of autophagosomes, targeting the dysfunctional mitochondrion to lysosomal degradation. Similar NME4-supported CL externalization is likely also involved in apoptosis and inflammatory reactions.
- Subjects :
- 0301 basic medicine
Cardiolipins
[SDV]Life Sciences [q-bio]
Apoptosis
[SDV.BC]Life Sciences [q-bio]/Cellular Biology
Mitochondrion
Pharmacology
Models, Biological
Pathology and Forensic Medicine
03 medical and health sciences
chemistry.chemical_compound
Mitophagy
Cardiolipin
Animals
Humans
[SDV.EE.SANT] Life Sciences [q-bio]/Ecology, environment/Health
Kinase activity
Inner mitochondrial membrane
Molecular Biology
Nucleoside Diphosphate Kinase D
[SDV.EE.SANT]Life Sciences [q-bio]/Ecology, environment/Health
Intermembrane phospholipid transfer activity
030102 biochemistry & molecular biology
Cell Biology
Cell biology
030104 developmental biology
chemistry
Mitochondrial Membranes
Signal transduction
Protein Binding
Signal Transduction
Subjects
Details
- Language :
- English
- ISSN :
- 00236837 and 15300307
- Database :
- OpenAIRE
- Journal :
- Laboratory Investigation, Laboratory Investigation, Nature Publishing Group, 2017, 98 (2), pp.228-232. ⟨10.1038/labinvest.2017.113⟩, Laboratory Investigation, Nature Publishing Group, 2018, 98 (2), pp.228-232. ⟨10.1038/labinvest.2017.113⟩, Laboratory Investigation, 2018, 98 (2), pp.228-232. ⟨10.1038/labinvest.2017.113⟩
- Accession number :
- edsair.doi.dedup.....459fffdd66489a11eba63c492e75da69