title: Cloning, expression, purification, crystallization and preliminary crystallographic analysis of 5-aminolaevulinic acid dehydratase from Bacillus subtilis.
abstract: 5-aminolaevulinic acid dehydratase (ALAD), a crucial enzyme in the biosynthesis of tetrapyrrole, catalyses the condensation of two 5-aminolaevulinic acid (ALA) molecules to form porphobilinogen (PBG). The gene encoding ALAD was amplified from genomic DNA of Bacillus subtilis and the protein was overexpressed in Escherichia coli strain BL21 (DE3). The protein was purified and crystallized with an additional MGSSHHHHHHSSGLVPRGSH- tag at the N-terminus of the target protein. Diffraction-quality single crystals were obtained by the hanging-drop vapour-diffusion method. An X-ray diffraction data set was collected at a resolution of 2.7 A.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230027, People's Republic of China.
authors.forename: Qianda
authors.initials: Q
authors.lastname: Lu
authors.forename: Jinming
authors.initials: J
authors.lastname: Ma
authors.forename: Hui
authors.initials: H
authors.lastname: Rong
authors.forename: Jun
authors.initials: J
authors.lastname: Fan
authors.forename: Ye
authors.initials: Y
authors.lastname: Yuan
authors.forename: Kuai
authors.initials: K
authors.lastname: Li
authors.forename: Yongxiang
authors.initials: Y
authors.lastname: Gao
authors.forename: Xiao
authors.initials: X
authors.lastname: Zhang
authors.forename: Maikun
authors.initials: M
authors.lastname: Teng
authors.forename: Liwen
authors.initials: L
authors.lastname: Niu
mesh_terms: D001412:Bacillus subtilis / Q000201:enzymology*; D003001:Cloning, Molecular; D003460:Crystallization; D018360:Crystallography, X-Ray; D015870:Gene Expression; D000623:Porphobilinogen Synthase / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification
chemical_list: D000623:Porphobilinogen Synthase
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