7f1a

Odinarchaeota tubulin (OdinTubulin) H393D mutant, in a protofilament arrangement, bound 78% GTP/22% GDP 1 K+, 1 Mg2+

spinqualitylabelsall models 7f1a, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7f1a is a 1 chain structure with sequence from Candidatus Odinarchaeota archaeon LCB_4. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.9Å Ligands: GDP, GTP, K, MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A1Q9N9N5_ODILC Publication Abstract from PubMed Tubulins are critical for the internal organization of eukaryotic cells, and understanding their emergence is an important question in eukaryogenesis. Asgard archaea are the closest known prokaryotic relatives to eukaryotes. Here, we elucidated the apo and nucleotide-bound x-ray structures of an Asgard tubulin from hydrothermal living Odinarchaeota (OdinTubulin). The guanosine 5'-triphosphate (GTP)-bound structure resembles a microtubule protofilament, with GTP bound between subunits, coordinating the "+" end subunit through a network of water molecules and unexpectedly by two cations. A water molecule is located suitable for GTP hydrolysis. Time course crystallography and electron microscopy revealed conformational changes on GTP hydrolysis. OdinTubulin forms tubules at high temperatures, with short curved protofilaments coiling around the tubule circumference, more similar to FtsZ, rather than running parallel to its length, as in microtubules. Thus, OdinTubulin represents an evolutionary stage intermediate between prokaryotic FtsZ and eukaryotic microtubule-forming tubulins. Structure and dynamics of Odinarchaeota tubulin and the implications for eukaryotic microtubule evolution.,Akil C, Ali S, Tran LT, Gaillard J, Li W, Hayashida K, Hirose M, Kato T, Oshima A, Fujishima K, Blanchoin L, Narita A, Robinson RC Sci Adv. 2022 Mar 25;8(12):eabm2225. doi: 10.1126/sciadv.abm2225. Epub 2022 Mar, 25. PMID:35333570 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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