title: Purification, crystallization and preliminary X-ray analysis of the PCNA2-PCNA3 complex from Sulfolobus tokodaii strain 7.
abstract: Crenarchaeal PCNA is known to consist of three subunits (PCNA1, PCNA2 and PCNA3) that form a heterotrimer (PCNA123). Recently, another heterotrimeric PCNA composed of only PCNA2 and PCNA3 was identified in Sulfolobus tokodaii strain 7 (stoPCNAs). In this study, the purified stoPCNA2-stoPCNA3 complex was crystallized by hanging-drop vapour diffusion. The crystals obtained belonged to the orthorhombic space groups I222 and P2(1)2(1)2, with unit-cell parameters a = 91.1, b = 111.8, c = 170.9 A and a = 91.1, b = 160.6, c = 116.6 A, respectively. X-ray diffraction data sets were collected to 2.90 A resolution for the I222 crystals and to 2.80 A resolution for the P2(1)2(1)2 crystals.
authors.affiliation: Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan.
authors.forename: Akito
authors.initials: A
authors.lastname: Kawai
authors.forename: Shigesada
authors.initials: S
authors.lastname: Higuchi
authors.forename: Masaru
authors.initials: M
authors.lastname: Tsunoda
authors.forename: Kazuo T
authors.initials: KT
authors.lastname: Nakamura
authors.forename: Shuichi
authors.initials: S
authors.lastname: Miyamoto
mesh_terms: D019843:Archaeal Proteins / Q000737:chemistry* / Q000302:isolation & purification; D003460:Crystallization; D018360:Crystallography, X-Ray; D004591:Electrophoresis, Polyacrylamide Gel; D046912:Multiprotein Complexes / Q000737:chemistry / Q000302:isolation & purification; D018809:Proliferating Cell Nuclear Antigen / Q000737:chemistry* / Q000302:isolation & purification; D011487:Protein Conformation; D021122:Protein Subunits; D011994:Recombinant Proteins / Q000737:chemistry / Q000302:isolation & purification; D016944:Sulfolobus / Q000737:chemistry*
chemical_list: D019843:Archaeal Proteins; D046912:Multiprotein Complexes; D018809:Proliferating Cell Nuclear Antigen; D021122:Protein Subunits; D011994:Recombinant Proteins