sperm entry / positive regulation of Golgi lumen acidification / symbiont-mediated suppression of host transcription / negative regulation of dendritic spine morphogenesis / motor learning / regulation of ubiquitin-dependent protein catabolic process / symbiont-mediated perturbation of host apoptosis / prostate gland growth / HECT-type E3 ubiquitin transferase / activation of GTPase activity ...sperm entry / positive regulation of Golgi lumen acidification / symbiont-mediated suppression of host transcription / negative regulation of dendritic spine morphogenesis / motor learning / regulation of ubiquitin-dependent protein catabolic process / symbiont-mediated perturbation of host apoptosis / prostate gland growth / HECT-type E3 ubiquitin transferase / activation of GTPase activity / Loss of function of TP53 in cancer due to loss of tetramerization ability / Regulation of TP53 Expression / negative regulation of helicase activity / signal transduction by p53 class mediator / negative regulation of G1 to G0 transition / negative regulation of glucose catabolic process to lactate via pyruvate / Transcriptional activation of cell cycle inhibitor p21 / regulation of intrinsic apoptotic signaling pathway by p53 class mediator / negative regulation of pentose-phosphate shunt / ATP-dependent DNA/DNA annealing activity / Activation of NOXA and translocation to mitochondria / regulation of cell cycle G2/M phase transition / regulation of fibroblast apoptotic process / intrinsic apoptotic signaling pathway in response to hypoxia / oligodendrocyte apoptotic process / negative regulation of miRNA processing / positive regulation of thymocyte apoptotic process / oxidative stress-induced premature senescence / regulation of tissue remodeling / glucose catabolic process to lactate via pyruvate / positive regulation of mitochondrial membrane permeability / positive regulation of programmed necrotic cell death / mRNA transcription / bone marrow development / circadian behavior / regulation of mitochondrial membrane permeability involved in apoptotic process / germ cell nucleus / RUNX3 regulates CDKN1A transcription / TP53 regulates transcription of additional cell cycle genes whose exact role in the p53 pathway remain uncertain / TP53 Regulates Transcription of Death Receptors and Ligands / Activation of PUMA and translocation to mitochondria / regulation of DNA damage response, signal transduction by p53 class mediator / histone deacetylase regulator activity / negative regulation of glial cell proliferation / Regulation of TP53 Activity through Association with Co-factors / negative regulation of neuroblast proliferation / T cell lineage commitment / mitochondrial DNA repair / Formation of Senescence-Associated Heterochromatin Foci (SAHF) / ER overload response / B cell lineage commitment / thymocyte apoptotic process / TP53 Regulates Transcription of Caspase Activators and Caspases / negative regulation of mitophagy / cardiac septum morphogenesis / negative regulation of DNA replication / entrainment of circadian clock by photoperiod / PI5P Regulates TP53 Acetylation / negative regulation of telomere maintenance via telomerase / Zygotic genome activation (ZGA) / positive regulation of release of cytochrome c from mitochondria / Association of TriC/CCT with target proteins during biosynthesis / necroptotic process / locomotory exploration behavior / TP53 Regulates Transcription of Genes Involved in Cytochrome C Release / rRNA transcription / TFIID-class transcription factor complex binding / SUMOylation of transcription factors / TP53 regulates transcription of several additional cell death genes whose specific roles in p53-dependent apoptosis remain uncertain / intrinsic apoptotic signaling pathway by p53 class mediator / androgen receptor signaling pathway / T cell proliferation involved in immune response / negative regulation of reactive oxygen species metabolic process / positive regulation of execution phase of apoptosis / Transcriptional Regulation by VENTX / regulation of proteolysis / postsynaptic cytosol / replicative senescence / cellular response to UV-C / general transcription initiation factor binding / intrinsic apoptotic signaling pathway in response to endoplasmic reticulum stress / cellular response to actinomycin D / neuroblast proliferation / positive regulation of RNA polymerase II transcription preinitiation complex assembly / carbohydrate transmembrane transporter activity / maltose binding / intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / response to X-ray / type II interferon-mediated signaling pathway / maltose transport / hematopoietic stem cell differentiation / maltodextrin transmembrane transport / Pyroptosis / chromosome organization / viral process / embryonic organ development / somitogenesis / TP53 Regulates Transcription of Genes Involved in G1 Cell Cycle Arrest / glial cell proliferation / hematopoietic progenitor cell differentiation Similarity search - Function
Journal: Nat Commun / Year: 2024 Title: Structure of the p53 degradation complex from HPV16. Authors: John C K Wang / Hannah T Baddock / Amirhossein Mafi / Ian T Foe / Matthew Bratkowski / Ting-Yu Lin / Zena D Jensvold / Magdalena Preciado López / David Stokoe / Dan Eaton / Qi Hao / Aaron H Nile / Abstract: Human papillomavirus (HPV) is a significant contributor to the global cancer burden, and its carcinogenic activity is facilitated in part by the HPV early protein 6 (E6), which interacts with the E3- ...Human papillomavirus (HPV) is a significant contributor to the global cancer burden, and its carcinogenic activity is facilitated in part by the HPV early protein 6 (E6), which interacts with the E3-ligase E6AP, also known as UBE3A, to promote degradation of the tumor suppressor, p53. In this study, we present a single-particle cryoEM structure of the full-length E6AP protein in complex with HPV16 E6 (16E6) and p53, determined at a resolution of ~3.3 Å. Our structure reveals extensive protein-protein interactions between 16E6 and E6AP, explaining their picomolar binding affinity. These findings shed light on the molecular basis of the ternary complex, which has been pursued as a potential therapeutic target for HPV-driven cervical, anal, and oropharyngeal cancers over the last two decades. Understanding the structural and mechanistic underpinnings of this complex is crucial for developing effective therapies to combat HPV-induced cancers. Our findings may help to explain why previous attempts to disrupt this complex have failed to generate therapeutic modalities and suggest that current strategies should be reevaluated.
Name: Maltose/maltodextrin-binding periplasmic protein,Protein E6 type: protein_or_peptide / ID: 1 Details: The cysteine to serine mutations are in the protein E6 portion of the chimeric construct.,The cysteine to serine mutations are in the protein E6 portion of the chimeric construct. Number of copies: 1 / Enantiomer: LEVO
Name: ZINC ION / type: ligand / ID: 4 / Number of copies: 3 / Formula: ZN
Molecular weight
Theoretical: 65.409 Da
-
Experimental details
-
Structure determination
Method
cryo EM
Processing
single particle reconstruction
Aggregation state
particle
-
Sample preparation
Concentration
2.15 mg/mL
Buffer
pH: 7 Component:
Concentration
Formula
Name
50.0 mM
C4H11NO3
Tris
150.0 mM
NaCl
Sodium Chloride
5.0 mM
C4H10O2S2
DTT
0.01 Percent
C32H58N2O8S
CHAPSO
Grid
Model: Quantifoil R1.2/1.3 / Support film - Material: CARBON / Support film - topology: HOLEY / Support film - Film thickness: 30 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec.
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV
-
Electron microscopy
Microscope
FEI TITAN KRIOS
Image recording
Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 80.5 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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