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An autophagosome is a spherical structure with double layer membranes. [2] It is the key structure in macroautophagy , the intracellular degradation system for cytoplasmic contents (e.g., abnormal intracellular proteins , excess or damaged organelles , invading microorganisms).
Autophagy (or autophagocytosis; from the Greek αὐτόφαγος, autóphagos, meaning "self-devouring" [1] and κύτος, kýtos, meaning "hollow") [2] is the natural, conserved degradation of the cell that removes unnecessary or dysfunctional components through a lysosome-dependent regulated mechanism. [3]
The autophagosome also fuses with lysosomes to degrade its contents. When M. tuberculosis inhibit phagosome acidification, Interferon gamma can induce autophagy and rescue the maturation process. [ 30 ]
Autophagy related 16 like 1 is a protein that in humans is encoded by the ATG16L1 gene. [5] This protein is characterized as a subunit of the autophagy-related ATG12-ATG5/ATG16 complex and is essentially important for the LC3 lipidation and autophagosome formation.
MAP1LC3B is a member of the highly conserved ATG8 protein family. ATG8 proteins are present in all known eukaryotic organisms. The animal ATG8 family comprises three subfamilies: (i) microtubule-associated protein 1 light chain 3 (MAP1LC3); (ii) Golgi-associated ATPase enhancer of 16 kDa (GATE-16); and (iii) γ-amino-butyric acid receptor-associate protein ().
Chaperone-mediated autophagy (CMA) refers to the chaperone-dependent selection of soluble cytosolic proteins that are then targeted to lysosomes and directly translocated across the lysosome membrane for degradation.
Omegasomes act as progenitors of autophagosome formation during the autophagy pathway. [14] There are various autophagosome mediators involved in autophagy, however it is the omegasome regulation of the pathway that provides a smooth transition of autophagosome formation, and enrichment of nutrients in the cells. [14]
AuTophaGy related 1 (Atg1) is a 101.7kDa serine/threonine kinase in S.cerevisiae, encoded by the gene ATG1. [1] It is essential for the initial building of the autophagosome and Cvt vesicles.