6m5u

The coordinates of the monomeric terminase complex in the presence of the ADP-BeF3

spinqualitylabelsall models 6m5u, resolution 3.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6m5u is a 3 chain structure with sequence from Human alphaherpesvirus 1 strain 17. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.8Å Ligands: ADP, BEF, MG, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TRM1_HHV11 Component of the molecular motor that translocates viral genomic DNA in empty capsid during DNA packaging. Forms a tripartite terminase complex together with TRM2 and TRM3 in the host cytoplasm. Once the complex reaches the host nucleus, it interacts with the capsid portal vertex. This portal forms a ring in which genomic DNA is translocated into the capsid. TRM1 carries an endonuclease activity that plays an important role for the cleavage of concatemeric viral DNA into unit length genomes.[HAMAP-Rule:MF_04014] Publication Abstract from PubMed Genome packaging is a fundamental process in a viral life cycle and a prime target of antiviral drugs. Herpesviruses use an ATP-driven packaging motor/terminase complex to translocate and cleave concatemeric dsDNA into procapsids but its molecular architecture and mechanism are unknown. We report atomic structures of a herpesvirus hexameric terminase complex in both the apo and ADP*BeF3-bound states. Each subunit of the hexameric ring comprises three components-the ATPase/terminase pUL15 and two regulator/fixer proteins, pUL28 and pUL33-unlike bacteriophage terminases. Distal to the nuclease domains, six ATPase domains form a central channel with conserved basic-patches conducive to DNA binding and trans-acting arginine fingers are essential to ATP hydrolysis and sequential DNA translocation. Rearrangement of the nuclease domains mediated by regulatory domains converts DNA translocation mode to cleavage mode. Our structures favor a sequential revolution model for DNA translocation and suggest mechanisms for concerted domain rearrangements leading to DNA cleavage. Architecture of the herpesvirus genome-packaging complex and implications for DNA translocation.,Yang Y, Yang P, Wang N, Chen Z, Su D, Zhou ZH, Rao Z, Wang X Protein Cell. 2020 May;11(5):339-351. doi: 10.1007/s13238-020-00710-0. Epub 2020 , Apr 23. PMID:32328903 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Terminase 3D Structures

Proteopedia Page Contributors and Editors (what is this?)

OCA