title: Expression, purification, crystallization and preliminary crystallographic analysis of an endo-1,5-alpha-L-arabinanase from hyperthermophilic Thermotoga petrophila.
abstract: The endo-1,5-alpha-L-arabinanases belonging to glycoside hydrolase family 43 are of great industrial interest for use in food technology, organic synthesis and biofuel production owing to their ability to catalyze the hydrolysis of alpha-1,5-arabinofuranosidic bonds in arabinose-containing polysaccharides. In this work, Thermotoga petrophila endo-1,5-alpha-L-arabinanase, a GH43-family member, has been cloned, overexpressed, purified and crystallized. Single crystals were obtained from a solution containing 0.1 M MES buffer pH 6.5, 0.8 M ammonium sulfate, 0.1 M EDTA, 0.1 M L-proline and 5%(v/v) dioxane. X-ray diffraction data were collected to a resolution of 2.86 A using synchrotron radiation and the diffraction pattern was indexed in the tetragonal space group P422, with unit-cell parameters a = b = 83.71, c = 408.25 A.
authors.affiliation: Bioethanol Science and Technology Center, Brazilian Association for Synchrotron Light Technology, Campinas-SP, Brazil.
authors.forename: Fabio Marcio
authors.initials: FM
authors.lastname: Squina
authors.forename: Rolf Alexander
authors.initials: RA
authors.lastname: Prade
authors.forename: Hongliang
authors.initials: H
authors.lastname: Wang
authors.forename: Mario Tyago
authors.initials: MT
authors.lastname: Murakami
mesh_terms: D000595:Amino Acid Sequence; D003460:Crystallization; D018360:Crystallography, X-Ray; D006026:Glycoside Hydrolases / Q000737:chemistry* / Q000302:isolation & purification*; D006090:Gram-Negative Bacteria / Q000201:enzymology*; D008969:Molecular Sequence Data; D016415:Sequence Alignment; D013696:Temperature
chemical_list: D006026:Glycoside Hydrolases; C082526:arabinan endo-1,5-alpha-L-arabinosidase