4znj | pdb_00004znj

Thermus Phage P74-26 Large Terminase ATPase domain mutant R139A (I 2 3 space group)

spinqualitylabelsall models 4znj, resolution 2.53Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4znj is a 1 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: SO4 Related: 4zni, 4znk, 4znl Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Many viruses package their genomes into procapsids using an ATPase machine that is among the most powerful known biological motors. However, how this motor couples ATP hydrolysis to DNA translocation is still unknown. Here, we introduce a model system with unique properties for studying motor structure and mechanism. We describe crystal structures of the packaging motor ATPase domain that exhibit nucleotide-dependent conformational changes involving a large rotation of an entire subdomain. We also identify the arginine finger residue that catalyzes ATP hydrolysis in a neighboring motor subunit, illustrating that previous models for motor structure need revision. Our findings allow us to derive a structural model for the motor ring, which we validate using small-angle X-ray scattering and comparisons with previously published data. We illustrate the model's predictive power by identifying the motor's DNA-binding and assembly motifs. Finally, we integrate our results to propose a mechanistic model for DNA translocation by this molecular machine. Structure and mechanism of the ATPase that powers viral genome packaging.,Hilbert BJ, Hayes JA, Stone NP, Duffy CM, Sankaran B, Kelch BA Proc Natl Acad Sci U S A. 2015 Jul 21;112(29):E3792-9. doi:, 10.1073/pnas.1506951112. Epub 2015 Jul 6. PMID:26150523 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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