4gdl

Crystal Structure of Human Atg12~Atg5 Conjugate in Complex with an N-terminal Fragment of Atg16L1

spinqualitylabelsall models 4gdl, resolution 2.88Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4gdl is a 3 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NA Related: 4gdk Gene: APG12, APG12L, ATG12 (HUMAN), APG5L, ASP, ATG5 (HUMAN), APG16L, ATG16L1, UNQ9393/PRO34307 (HUMAN) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Disease [A16L1_HUMAN] Crohn disease. Disease susceptibility is associated with variations affecting the gene represented in this entry. Function [ATG12_HUMAN] Ubiquitin-like protein involved in autophagy vesicles formation. Conjugation with ATG5 through an ubiquitin-like conjugating system involving also ATG7 as an E1-like activating enzyme and ATG10 as an E2-like conjugating enzyme, is essential for its function. The ATG12-ATG5 conjugate acts as an E3-like enzyme which is required for lipidation of ATG8 family proteins and their association to the vesicle membranes. The ATG12-ATG5 conjugate also regulates negatively the innate antiviral immune response by blocking the type I IFN production pathway through direct association with RARRES3 and MAVS. Plays also a role in translation or delivery of incoming viral RNA to the translation apparatus. [A16L1_HUMAN] Plays an essential role in autophagy: interacts with ATG12-ATG5 to mediate the conjugation of phosphatidylethanolamine (PE) to LC3 (MAP1LC3A, MAP1LC3B or MAP1LC3C), to produce a membrane-bound activated form of LC3 named LC3-II. [ATG5_HUMAN] Involved in autophagy vesicles formation. Conjugation with ATG12 through an ubiquitin-like conjugating system involving ATG7 as an E1-like activating enzyme and ATG10 as an E2-like conjugating enzyme, is essential for its function. The ATG12-ATG5 conjugate acts as an E3-like enzyme which is required for lipidation of ATG8 family proteins and their association to the vesicle membranes. Involved in mitochondrial quality control after oxidative damage, and in subsequent cellular longevity. The ATG12-ATG5 conjugate also regulates negatively the innate antiviral immune response by blocking the type I IFN production pathway through direct association with RARRES3 and MAVS. Plays also a role in translation or delivery of incoming viral RNA to the translation apparatus. HCV utilizes ATG5 as a proviral factor during the onset of viral infection. Plays a critical role in multiple aspects of lymphocyte development and is essential for both B and T lymphocyte survival and proliferation. Required for optimal processing and presentation of antigens for MHC II. Involved in the maintenance of axon morphology and membrane structures; as well as in normal adipocyte differentiation. May play an important role in the apoptotic process, possibly within the modified cytoskeleton. Its expression is a relatively late event in the apoptotic process, occurring downstream of caspase activity. Plays a crucial role in IFN-gamma-induced autophagic cell death by interacting with FADD. Publication Abstract from PubMed The autophagy factor ATG12~ATG5 conjugate exhibits E3 ligase-like activity which facilitates the lipidation of members of the LC3 family. The crystal structure of the human ATG12~ATG5 conjugate bound to the N-terminal region of ATG16L1, the factor that recruits the conjugate to autophagosomal membranes, reveals an integrated architecture in which ATG12 docks onto ATG5 through conserved residues. ATG12 and ATG5 are oriented such that other conserved residues on each molecule, including the conjugation junction, form a continuous surface patch. Mutagenesis data support the importance of both the interface between ATG12 and ATG5 and the continuous patch for E3 activity. The ATG12~ATG5 conjugate interacts with the E2 enzyme ATG3 with high affinity through another surface location that is exclusive to ATG12, suggesting a different role of the continuous patch in E3 activity. These findings provide a foundation for understanding the mechanism of LC3 lipidation. Structure of the human ATG12~ATG5 conjugate required for LC3 lipidation in autophagy.,Otomo C, Metlagel Z, Takaesu G, Otomo T Nat Struct Mol Biol. 2012 Dec 2. doi: 10.1038/nsmb.2431. PMID:23202584 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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