3lmt

Crystal structure of DTD from Plasmodium falciparum

spinqualitylabelsall models 3lmt, resolution 2.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3lmt is a 6 chain structure with sequence from Plaf7. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: IOD Related: 3knf, 3knp, 3ko3, 3ko4, 3ko5, 3ko7, 3ko9, 3kob, 3koc, 3kod, 3lmu, 3lmv Gene: DTD, PF11_0095 (PLAF7) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [Q8IIS0_PLAF7] Hydrolyzes D-tyrosyl-tRNA(Tyr) into D-tyrosine and free tRNA(Tyr). Could be a defense mechanism against a harmful effect of D-tyrosine (By similarity).[RuleBase:RU003470] 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 D-Tyrosyl-tRNA(Tyr) deacylase (DTD) is an editing enzyme that removes D-amino acids from mischarged tRNAs. The crystal structure of Plasmodium falciparum DTD (PfDTD) was determined using the iodide-SAD phasing method. Iodide-derivatized PfDTD crystals were obtained using the quick cryo-soaking procedure in which native crystals were soaked for a short period of 10-30 s in cryoprotectant solution containing 0.2-1 M NaI. Iodide-SAD data sets were collected to 3.3 and 2.74 A resolution from PfDTD crystals that belonged to two different space groups, P4(3) and P1, using an in-house X-ray copper-anode source. This is the first report to detail structure solution using low iodide anomalous signal, modest resolution and redundancy and average solvent content for SAD phasing of 984 and 1312 amino acids in the triclinic P1 and tetragonal P4(3) space groups, respectively. A total of 85% and 56% of the residues were automatically built into the iodide-phased electron-density maps using PHENIX AutoBuild. The structure of HEPES-bound PfDTD was subsequently determined by molecular replacement and refined to 2.83 A resolution. The crystals obtained from various batches of crystallization trials of PfDTD exhibited polymorphism in terms of belonging to different crystal forms and space groups. Even within a given crystal system the unit-cell parameters showed high non-isomorphism. These packing variations were exploited in order to conduct a systematic study of conformational changes in PfDTD. It is shown that the disposition of a ten-residue insertion loop affects packing within the PfDTD crystals and seems to determine the non-isomorphism in unit-cell parameters. By tracking the changes in PfDTD unit cells, it was possible to map conformational differences within PfDTD that may be of significance for enzyme activity. Structure of D-tyrosyl-tRNATyr deacylase using home-source Cu Kalpha and moderate-quality iodide-SAD data: structural polymorphism and HEPES-bound enzyme states.,Yogavel M, Khan S, Bhatt TK, Sharma A Acta Crystallogr D Biol Crystallogr. 2010 May;66(Pt 5):584-92. Epub 2010, Apr 21. PMID:20445234 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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