title: Purification, crystallization and preliminary X-ray diffraction analysis of disease-related mutants of p97.
abstract: The human type II AAA+ protein p97 participates in various cellular activities, presumably through its involvement in the ubiquitin-proteasome degradation pathway. Mutations in p97 have been implicated in patients with inclusion-body myopathy associated with Paget's disease of the bone and frontotemporal dementia (IBMPFD). In this work, three mutant p97 N-D1 fragments, R86A, R95G and R155H, were crystallized in the presence of ATPgammaS with PEG 3350 as a main precipitant, yielding two different crystal forms. The R155H mutant crystal belonged to space group R3, with unit-cell parameters in the hexagonal setting of a = b = 134.2, c = 182.9 angstrom, and was merohedrally twinned, with an estimated twin fraction of 0.34. The crystals of the R86A and R95G mutants belonged to space group P1, with similar unit-cell parameters of a = 90.89, b = 102.6, c = 107.2 angstrom, alpha = 97.5, beta = 90.6, gamma = 91.5 degrees and a = 92.76, b = 103.7, c = 107.7 angstrom , alpha = 97.7, beta = 91.9, gamma = 89.7 degrees, respectively.
authors.affiliation: Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA.
authors.forename: Wai Kwan
authors.initials: WK
authors.lastname: Tang
authors.forename: Dongyang
authors.initials: D
authors.lastname: Li
authors.forename: Lothar
authors.initials: L
authors.lastname: Esser
authors.forename: Di
authors.initials: D
authors.lastname: Xia
mesh_terms: D000251:Adenosine Triphosphatases / Q000737:chemistry* / Q000235:genetics; D003460:Crystallization; D018360:Crystallography, X-Ray; D005615:Freezing; D057180:Frontotemporal Dementia / Q000201:enzymology / Q000235:genetics; D006801:Humans; D008969:Molecular Sequence Data; D009154:Mutation; D009687:Nuclear Proteins / Q000737:chemistry* / Q000235:genetics; D010001:Osteitis Deformans / Q000201:enzymology / Q000235:genetics; D014961:X-Ray Diffraction
chemical_list: D009687:Nuclear Proteins; D000251:Adenosine Triphosphatases; C404942:p97 ATPase