4hud

Structure of the bacteriophage T4 tail terminator protein, gp15.

spinqualitylabelsall models 4hud, resolution 2.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4hud is a 6 chain structure with sequence from Escherichia virus T4. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.7001Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function COMPL_BPT4 Stabilizes the tail sheath structure and acts as a connector between the end of tail and the portal vertex of the capsid. Publication Abstract from PubMed A hexamer of the bacteriophage T4 tail terminator protein, gp15, attaches to the top of the phage tail stabilizing the contractile sheath and forming the interface for binding of the independently assembled head. Here we report the crystal structure of the gp15 hexamer, describe its interactions in T4 virions that have either an extended tail or a contracted tail, and discuss its structural relationship to other phage proteins. The neck of T4 virions is decorated by the "collar" and "whiskers", made of fibritin molecules. Fibritin acts as a chaperone helping to attach the long tail fibers to the virus during the assembly process. The collar and whiskers are environment-sensing devices, regulating the retraction of the long tail fibers under unfavorable conditions, thus preventing infection. Cryo-electron microscopy analysis suggests that twelve fibritin molecules attach to the phage neck with six molecules forming the collar and six molecules forming the whiskers. The Molecular Architecture of the Bacteriophage T4 Neck.,Fokine A, Zhang Z, Kanamaru S, Bowman VD, Aksyuk AA, Arisaka F, Rao VB, Rossmann MG J Mol Biol. 2013 Feb 19. pii: S0022-2836(13)00098-3. doi:, 10.1016/j.jmb.2013.02.012. PMID:23434847 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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