6ppd | pdb_00006ppd

Kaposi's sarcoma-associated herpesvirus (KSHV), C1 penton vertex register, CATC-absent structure

Loading... Status: waiting for Mol* initialization Structural highlights 6ppd is a 16 chain structure with sequence from Human herpesvirus 8 strain GK18. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.7Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SCP_HHV8P Participates in the assembly of the infectious particles by decorating the outer surface of the capsid shell and thus forming a layer between the capsid and the tegument. Complexes composed of the major capsid protein and small capsomere-interacting protein/SCP assemble together in the host cytoplasm and are translocated to the nucleus, where they accumulate and participate in capsid assembly.[HAMAP-Rule:MF_04022] Publication Abstract from PubMed Assembly of Kaposi's sarcoma-associated herpesvirus (KSHV) begins at a bacteriophage-like portal complex that nucleates formation of an icosahedral capsid with capsid-associated tegument complexes (CATCs) and facilitates translocation of an approximately 150-kb dsDNA genome, followed by acquisition of a pleomorphic tegument and envelope. Because of deviation from icosahedral symmetry, KSHV portal and tegument structures have largely been obscured in previous studies. Using symmetry-relaxed cryo-EM, we determined the in situ structure of the KSHV portal and its interactions with surrounding capsid proteins, CATCs, and the terminal end of KSHV's dsDNA genome. Our atomic models of the portal and capsid/CATC, together with visualization of CATCs' variable occupancy and alternate orientation of CATC-interacting vertex triplexes, suggest a mechanism whereby the portal orchestrates procapsid formation and asymmetric long-range determination of CATC attachment during DNA packaging prior to pleomorphic tegumentation/envelopment. Structure-based mutageneses confirm that a triplex deep binding groove for CATCs is a hotspot that holds promise for antiviral development. DNA-Packing Portal and Capsid-Associated Tegument Complexes in the Tumor Herpesvirus KSHV.,Gong D, Dai X, Jih J, Liu YT, Bi GQ, Sun R, Zhou ZH Cell. 2019 Sep 5;178(6):1329-1343.e12. doi: 10.1016/j.cell.2019.07.035. Epub 2019, Aug 22. PMID:31447177 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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