title: Crystallization and preliminary X-ray diffraction analysis of the magnesium transporter CorA.
abstract: The full-length integral membrane protein CorA from Thermotoga maritima (TmCorA(1-351)) has been expressed in Escherichia coli and purified without membrane isolation. TmCorA(1-351) crystallized in the monoclinic space group C2, with unit-cell parameters a = 214.25, b = 86.30, c = 181.53 A, beta = 112.23 degrees. Native crystals diffracted to 3.7 A using synchrotron radiation, but selenomethionine-substituted crystals rarely diffracted to better than 5.0 A. All full-length protein crystals were highly mosaic and produced anisotropic diffraction patterns. To aid in crystallographic phasing, soluble domain constructs were screened and the periplasmic domain of CorA from Archaeoglobus fulgidus (AfCorA(1-263)) was crystallized in the hexagonal space group P6(1)22, with unit-cell parameters a = b = 101.17, c = 142.87 A. Native and SeMet-substituted AfCorA(1-263) crystals diffracted to approximately 3.0 A using synchrotron radiation.
authors.affiliation: Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9, Canada. payandeh@uhnres.utoronto.ca
authors.forename: Jian
authors.initials: J
authors.lastname: Payandeh
authors.forename: Emil F
authors.initials: EF
authors.lastname: Pai
mesh_terms: D019843:Archaeal Proteins / Q000737:chemistry / Q000378:metabolism; D019611:Archaeoglobus fulgidus / Q000737:chemistry; D001426:Bacterial Proteins / Q000737:chemistry* / Q000378:metabolism; D027682:Cation Transport Proteins / Q000737:chemistry* / Q000378:metabolism; D003460:Crystallization; D018360:Crystallography, X-Ray; D008274:Magnesium / Q000378:metabolism*; D008565:Membrane Proteins / Q000737:chemistry* / Q000378:metabolism; D020124:Thermotoga maritima / Q000737:chemistry* / Q000378:metabolism
chemical_list: D019843:Archaeal Proteins; D001426:Bacterial Proteins; D027682:Cation Transport Proteins; D008565:Membrane Proteins; D008274:Magnesium