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https://doi.org/10.3390/cells8030224
Title: | Rab7a and Mitophagosome Formation | Authors: | Tan, Esther Hui Na Tang, Bor Luen |
Keywords: | Science & Technology Life Sciences & Biomedicine Cell Biology autophagy mitophagy mitophagosome Rab7 Tre-2 Bub2 17 TRAF family-associated NF-kappa B activator binding kinase 1 (TBK1) AUTOPHAGOSOME-LYSOSOME FUSION TUMOR-SUPPRESSOR CONTACT SITES HOPS COMPLEX REGULATES AUTOPHAGY COPII VESICLES SMALL GTPASES PROTEIN RILP ULK1 COMPLEX RECRUITMENT |
Issue Date: | 8-Mar-2019 | Publisher: | MDPI | Citation: | Tan, Esther Hui Na, Tang, Bor Luen (2019-03-08). Rab7a and Mitophagosome Formation. CELLS 8 (3). ScholarBank@NUS Repository. https://doi.org/10.3390/cells8030224 | Abstract: | The small GTPase, Rab7a, and the regulators of its GDP/GTP-binding status were shown to have roles in both endocytic membrane traffic and autophagy. Classically known to regulate endosomal retrograde transport and late endosome-lysosome fusion, earlier work has indicated a role for Rab7a in autophagosome-lysosome fusion as well as autolysosome maturation. However, as suggested by recent findings on PTEN-induced kinase 1 (PINK1)-Parkin-mediated mitophagy, Rab7a and its regulators are critical for the correct targeting of Atg9a-bearing vesicles to effect autophagosome formation around damaged mitochondria. This mitophagosome formation role for Rab7a is dependent on an intact Rab cycling process mediated by the Rab7a-specific guanine nucleotide exchange factor (GEF) and GTPase activating proteins (GAPs). Rab7a activity in this regard is also dependent on the retromer complex, as well as phosphorylation by the TRAF family-associated NF-κB activator binding kinase 1 (TBK1). Here, we discuss these recent findings and broadened perspectives on the role of the Rab7a network in PINK1-Parkin mediated mitophagy. | Source Title: | CELLS | URI: | https://scholarbank.nus.edu.sg/handle/10635/245189 | ISSN: | 2073-4409 | DOI: | 10.3390/cells8030224 |
Appears in Collections: | Staff Publications Elements |
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