title: Crystallization and preliminary X-ray analysis of neuropsin, a serine protease expressed in the limbic system of mouse brain.
abstract: Neuropsin (M(r) 25032) is a serine protease expressed in the limbic system of mouse brain. It has been implicated in various neurological processes including formation of memory and may be important as a drug target in the treatment of epilepsy. The recombinant protein was produced using a baculovirus expression system and was purified. Two crystal forms were obtained by a hanging-drop vapor-diffusion method with polyethylene glycol. Preliminary X-ray crystallographic analysis revealed that crystal form I belongs to triclinic space group P1 with unit cell dimensions a = 97.16 A, b = 97.12 A, c = 46.75 A and alpha = 99.17 degrees, beta = 99.77 degrees, gamma = 117.35 degrees. Self-rotation function analysis of these data of form I indicates the position of a noncrystallographic threefold axis. There are six molecules in the crystallographic asymmetric unit. Crystal form II also belongs to triclinic space group P1 but has unit cell dimensions of a = 38.40 A, b = 55.16 A, c = 65.37 A and alpha = 95.38 degrees, beta = 89.98 degrees, gamma = 110.46 degrees with two molecules in the crystallographic asymmetric unit. Form II has a noncrystallographic twofold axis. Intensity data to 3.1 A resolution for form I and to 2.2 A resolution for form II have been collected.
authors.affiliation: Department of Molecular Biology, Nara Institute of Science and Technology (NAIST), Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kishi
authors.forename: M
authors.initials: M
authors.lastname: Kato
authors.forename: T
authors.initials: T
authors.lastname: Shimizu
authors.forename: K
authors.initials: K
authors.lastname: Kato
authors.forename: K
authors.initials: K
authors.lastname: Matsumoto
authors.forename: S
authors.initials: S
authors.lastname: Yoshida
authors.forename: S
authors.initials: S
authors.lastname: Shiosaka
authors.forename: T
authors.initials: T
authors.lastname: Hakoshima
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D016367:Baculoviridae / Q000235:genetics; D002460:Cell Line; D003460:Crystallization; D018360:Crystallography, X-Ray; D007610:Kallikreins; D008032:Limbic System / Q000201:enzymology*; D051379:Mice; D015394:Molecular Structure; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification; D012697:Serine Endopeptidases / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification
chemical_list: D011994:Recombinant Proteins; C094799:KLK8 protein, human; D007610:Kallikreins; D012697:Serine Endopeptidases