4f61 | pdb_00004f61

Tubulin:Stathmin-like domain complex

spinqualitylabelsall models 4f61, resolution 4.17Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4f61 is a 9 chain structure with sequence from Ovis aries and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GDP, GTP, MG Related: 4f6r Resources: FirstGlance, OCA, RCSB, PDBsum Function [D0VWZ0_SHEEP] 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 (By similarity).[RuleBase:RU003505][SAAS:SAAS023123_004_019801] [D0VWY9_SHEEP] 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 (By similarity).[RuleBase:RU003505] Publication Abstract from PubMed In cells, microtubule dynamics is regulated by stabilizing and destabilizing factors. Whereas proteins in both categories have been identified, their mechanism of action is rarely understood at the molecular level. This is due in part to the difficulties faced in structural approaches to obtain atomic models when tubulin is involved. Here, we design and characterize new stathmin-like domain (SLD) proteins that sequester tubulins in numbers different from two, the number of tubulins bound by stathmin or by the SLD of RB3, two stathmin family members that have been extensively studied. We established rules for the design of tight tubulin-SLD assemblies and applied them to complexes containing one to four tubulin heterodimers. Biochemical and structural experiments showed that the engineered SLDs behaved as expected. The new SLDs will be tools for structural studies of microtubule regulation. The larger complexes will be useful for cryo-electron microscopy, whereas crystallography or nuclear magnetic resonance will benefit from the 1:1 tubulin-SLD assembly. Finally, our results provide new insight into SLD function, suggesting that a major effect of these phosphorylatable proteins is the programmed release of sequestered tubulin for microtubule assembly at the specific cellular locations of members of the stathmin family. Design and characterization of modular scaffolds for tubulin assembly.,Mignot I, Pecqueur L, Dorleans A, Karuppasamy M, Ravelli RB, Dreier B, Pluckthun A, Knossow M, Gigant B J Biol Chem. 2012 Sep 7;287(37):31085-94. Epub 2012 Jul 12. PMID:22791712 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Tubulin

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