CRISPR RNA-guided autonomous delivery of Cas9. Wilkinson RA, Martin C et al. Nat Struct Mol Biol. 2019 Jan;26(1):14-24.
Cryo-EM structure of the native butyrylcholinesterase tetramer reveals a dimer of dimers stabilized by a superhelical assembly. Leung MR, van Bezouwen LS et al. Proc Natl Acad Sci USA. 2018 Dec 26;115(52):13270-13275.
Structure of the type VI secretion system TssK-TssF-TssG baseplate subcomplex revealed by cryo-electron microscopy. Park YJ, Lacourse KD et al. Nat Commun. 2018 Dec 19;9(1):5385.
Microtubule structure by cryo-EM: snapshots of dynamic instability. Manka SW, Moores CA. Essays Biochem. 2018 Dec 7;62(6):737-751.
Substrate-engaged 26S proteasome structures reveal mechanisms for ATP-hydrolysis-driven translocation. de la Peña AH, Goodall EA et al. Science. 2018 Nov 30;362(6418). pii: eaav0725.See also: RCSB PDB Images
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UCSF ChimeraX (or simply ChimeraX) is the next-generation molecular visualization program from the Resource for Biocomputing, Visualization, and Informatics (RBVI), following UCSF Chimera. ChimeraX can be downloaded free of charge for academic, government, nonprofit, and personal use. Commercial users, please see licensing.
ChimeraX development is supported in part by grants from the National Institutes of Health (currently R01-GM129325, previously P41-GM103311).
Protein α-helices can be shown as curved-cylinder “tubes“ with the cartoon style command. Helix tube mode is an alternative to the standard spiraling ribbons, and both modes are fully integrated with coil and β-strand cartoons. The structure at left is an AMPA-subtype glutamate receptor bound to the antiepileptic drug perampanel (PDB 5l1f). The receptor is tetrameric, and each chain is rainbow color-coded from blue at the N-terminus to red at the C-terminus. Four molecules of perampanel (pink) are bound near the bottom, between the transmembrane domain and the rest of the receptor. For image setup other than orientation, see the command file ampar.cxc.More features...
The outer-membrane protein CymA admits bulky molecules into the periplasmic space of Klebsiella oxytoca. Here, CymA (PDB 4d5d chain A) is depicted in a style reminiscent of a diagnostic X-ray, with transparent molecular surface and β-strand “ribs” in white. The protein has ingested α-cyclodextrin (top) and β-cyclodextrin (bottom), bound at the entry site and near the exit, respectively. Cyclodextrin carbon atoms are shown in blue-gray and oxygen atoms in brick red. For image setup, see the command file xray.cxc.
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