1ia0

KIF1A HEAD-MICROTUBULE COMPLEX STRUCTURE IN ATP-FORMKIF1A HEAD-MICROTUBULE COMPLEX STRUCTURE IN ATP-FORM

1ia0, resolution 15.00Å Show:Asymmetric Unit Biological Assembly Structural highlights 1ia0 is a 3 chain structure with sequence from Mus musculus and Sus scrofa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 15Å Ligands: Experimental data: Check Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TBA1A_PIG 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. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Kinesin motors are specialized enzymes that use hydrolysis of ATP to generate force and movement along their cellular tracks, the microtubules. Although numerous biochemical and biophysical studies have accumulated much data that link microtubule-assisted ATP hydrolysis to kinesin motion, the structural view of kinesin movement remains unclear. This study of the monomeric kinesin motor KIF1A combines X-ray crystallography and cryo-electron microscopy, and allows analysis of force-generating conformational changes at atomic resolution. The motor is revealed in its two functionally critical states-complexed with ADP and with a non-hydrolysable analogue of ATP. The conformational change observed between the ADP-bound and the ATP-like structures of the KIF1A catalytic core is modular, extends to all kinesins and is similar to the conformational change used by myosin motors and G proteins. Docking of the ADP-bound and ATP-like crystallographic models of KIF1A into the corresponding cryo-electron microscopy maps suggests a rationale for the plus-end directional bias associated with the kinesin catalytic core. Switch-based mechanism of kinesin motors.,Kikkawa M, Sablin EP, Okada Y, Yajima H, Fletterick RJ, Hirokawa N Nature. 2001 May 24;411(6836):439-45. PMID:11373668 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Kinesin 3D Structures Tubulin 3D Structures