4nyo

The 1.8 Angstrom Crystal Structure of the Periplasmic Divalent Cation Tolerance Protein Cuta from Pyrococcus Horikoshii OT3

spinqualitylabelsall models 4nyo, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4nyo is a 6 chain structure with sequence from Pyrococcus horikoshii OT3. This structure supersedes the now removed PDB entries 4lu7 and 1v99. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.8Å Ligands: CL, CSD, MES, NA, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CUTA_PYRHO Involved in resistance toward heavy metals. Publication Abstract from PubMed CutA1 (copper tolerance A1) is a widespread cytoplasmic protein found in archaea, bacteria, plants and animals, including humans. In Escherichia coli it is implicated in divalent metal tolerance, while the mammalian CutA1 homologue has been proposed to mediate brain enzyme acetylcholinesterase activity and copper homeostasis. The X-ray structures of CutA1 from the thermophilic bacterium Thermus thermophilus (TtCutA1) with and without bound Na(+) at 1.7 and 1.9 A resolution, respectively, and from the hyperthermophilic archaeon Pyrococcus horikoshii (PhCutA1) in complex with Na(+) at 1.8 A resolution have been determined. Both are short and rigid proteins of about 12 kDa that form intertwined compact trimers in the crystal and solution. The main difference in the structures is a wide-type beta-bulge on top of the TtCutA1 trimer. It affords a mechanism for lodging a single-residue insertion in the middle of beta2 while preserving the interprotomer main-chain hydrogen-bonding network. The liganded forms of the proteins provide new structural information about the metal-binding sites and CutA1 assembly. The Na(+)-TtCutA1 structure unveils a dodecameric assembly with metal ions in the trimer-trimer interfaces and the lateral clefts of the trimer. For Na(+)-PhCutA1, the metal ion associated with six waters in an octahedral geometry. The structures suggest that CutA1 may contribute to regulating intracellular metal homeostasis through various binding modes. The structures of the CutA1 proteins from Thermus thermophilus and Pyrococcus horikoshii: characterization of metal-binding sites and metal-induced assembly.,Bagautdinov B Acta Crystallogr F Struct Biol Commun. 2014 Apr;70(Pt 4):404-13. doi:, 10.1107/S2053230X14003422. Epub 2014 Mar 25. PMID:24699729 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also CutA1 3D structures

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