3ov8

Crystal structure of AF1382 from Archaeoglobus fulgidus, High resolution

spinqualitylabelsall models 3ov8, resolution 1.85Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3ov8 is a 1 chain structure with sequence from Arcfl. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ACT, CL Related: 3o3k Gene: AF1382, AF_1382 (ARCFL) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The crystal structure of the 11.14 kDa orphan ORF 1382 from Archaeoglobus fulgidus (AF1382) has been determined by sulfur SAD phasing using a moderately diffracting crystal and 1.9 A wavelength synchrotron X-rays. AF1382 was selected as a structural genomics target by the Southeast Collaboratory for Structural Genomics (SECSG) since sequence analyses showed that it did not belong to the Pfam-A database and thus could represent a novel fold. The structure was determined by exploiting longer wavelength X-rays and data redundancy to increase the anomalous signal in the data. AF1382 is a 95-residue protein containing five S atoms associated with four methionine residues and a single cysteine residue that yields a calculated Bijvoet ratio (DeltaF(anom)/F) of 1.39% for 1.9 A wavelength X-rays. Coupled with an average Bijvoet redundancy of 25 (two 360 degrees data sets), this produced an excellent electron-density map that allowed 69 of the 95 residues to be automatically fitted. The S-SAD model was then manually completed and refined (R = 23.2%, R(free) = 26.8%) to 2.3 A resolution (PDB entry 3o3k). High-resolution data were subsequently collected from a better diffracting crystal using 0.97 A wavelength synchrotron X-rays and the S-SAD model was refined (R = 17.9%, R(free) = 21.4%) to 1.85 A resolution (PDB entry 3ov8). AF1382 has a winged-helix-turn-helix structure common to many DNA-binding proteins and most closely resembles the N-terminal domain (residues 1-82) of the Rio2 kinase from A. fulgidus, which has been shown to bind DNA, and a number of MarR-family transcriptional regulators, suggesting a similar DNA-binding function for AF1382. The analysis also points out the advantage gained from carrying out data reduction and structure determination on-site while the crystal is still available for further data collection. Structure of the Archaeoglobus fulgidus orphan ORF AF1382 determined by sulfur SAD from a moderately diffracting crystal.,Zhu JY, Fu ZQ, Chen L, Xu H, Chrzas J, Rose J, Wang BC Acta Crystallogr D Biol Crystallogr. 2012 Sep;68(Pt 9):1242-52. Epub 2012 Aug 18. PMID:22948926 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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