3iz0

Human Ndc80 Bonsai Decorated MicrotubuleHuman Ndc80 Bonsai Decorated Microtubule

3iz0, resolution 8.60Å Show:Asymmetric Unit Biological Assembly Structural highlights 3iz0 is a 6 chain structure with sequence from Bos taurus and Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: Gene: NDC80 SPC25, SPBC25, AD024 (HUMAN), NUF2, RP11-77M5.2-004, SPC24 (HUMAN) Experimental data: Check Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The Ndc80 complex is a key site of regulated kinetochore-microtubule attachment (a process required for cell division), but the molecular mechanism underlying its function remains unknown. Here we present a subnanometre-resolution cryo-electron microscopy reconstruction of the human Ndc80 complex bound to microtubules, sufficient for precise docking of crystal structures of the component proteins. We find that the Ndc80 complex binds the microtubule with a tubulin monomer repeat, recognizing alpha- and beta-tubulin at both intra- and inter-tubulin dimer interfaces in a manner that is sensitive to tubulin conformation. Furthermore, Ndc80 complexes self-associate along protofilaments through interactions mediated by the amino-terminal tail of the NDC80 protein, which is the site of phospho-regulation by Aurora B kinase. The complex's mode of interaction with the microtubule and its oligomerization suggest a mechanism by which Aurora B could regulate the stability of load-bearing kinetochore-microtubule attachments. The Ndc80 kinetochore complex forms oligomeric arrays along microtubules.,Alushin GM, Ramey VH, Pasqualato S, Ball DA, Grigorieff N, Musacchio A, Nogales E Nature. 2010 Oct 14;467(7317):805-10. PMID:20944740 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Tubulin 3D Structures