5sb4 | pdb_00005sb4

Tubulin-todalam-8-complex

spinqualitylabelsall models 5sb4, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5sb4 is a 6 chain structure with sequence from Bos taurus, Gallus gallus and Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.5Å Ligands: 4B6, ACP, CA, GDP, GTP, MES, MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TBA1B_BOVIN Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain. Publication Abstract from PubMed In this study, we capitalized on our previously performed crystallographic fragment screen and developed the antitubulin small molecule Todalam with only two rounds of straightforward chemical synthesis. Todalam binds to a novel tubulin site, disrupts microtubule networks in cells, arrests cells in G2/M, induces cell death, and synergizes with vinblastine. The compound destabilizes microtubules by acting as a molecular plug that sterically inhibits the curved-to-straight conformational switch in the alpha-tubulin subunit, and by sequestering tubulin dimers into assembly incompetent oligomers. Our results describe for the first time the generation of a fully rationally designed small molecule tubulin inhibitor from a fragment, which displays a unique molecular mechanism of action. They thus demonstrate the usefulness of tubulin-binding fragments as valuable starting points for innovative antitubulin drug and chemical probe discovery campaigns. Rational Design of a Novel Tubulin Inhibitor with a Unique Mechanism of Action.,Muhlethaler T, Milanos L, Ortega JA, Blum TB, Gioia D, Roy B, Prota AE, Cavalli A, Steinmetz MO Angew Chem Int Ed Engl. 2022 Jun 20;61(25):e202204052. doi: , 10.1002/anie.202204052. Epub 2022 Apr 25. PMID:35404502 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Stathmin-4 3D structures Tubulin 3D Structures Tubulin tyrosine ligase 3D structures

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