title: Crystallization and preliminary X-ray crystallographic analysis of the probable tRNA-modification GTPase (TrmE) from Staphylococcus aureus.
abstract: Probable tRNA-modification GTPase (TrmE) is a guanine nucleotide-binding protein that is conserved between bacteria and humans. GTPase hydrolyzes GTP and plays a pivotal role in signalling pathways. In this study, TrmE from Staphylococcus aureus was overexpressed in Escherichia coli. The enzyme was found to crystallize at 295 K when ammonium sulfate was used as a precipitant. X-ray diffraction data were collected to 2.9 A resolution from the crystallized enzyme using synchrotron radiation. The crystal was found to belong to the cubic space group I23, with unit-cell parameters a = b = c = 229.47 A, alpha = beta = gamma = 90 degrees . The crystal is likely to contain four monomers in the asymmetric unit, with a corresponding V(M) of 2.4 A(3) Da(-1) and a solvent content of 50%.
authors.affiliation: Biomedical Research Center, Life Science Division, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea.
authors.forename: Amit
authors.initials: A
authors.lastname: Priyadarshi
authors.forename: Ki Hyun
authors.initials: KH
authors.lastname: Nam
authors.forename: Eunice Eunkyeong
authors.initials: EE
authors.lastname: Kim
authors.forename: Kwang Yeon
authors.initials: KY
authors.lastname: Hwang
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification; D003460:Crystallization; D018360:Crystallography, X-Ray; D020558:GTP Phosphohydrolases / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification; D012343:RNA, Transfer / Q000378:metabolism*; D013211:Staphylococcus aureus / Q000201:enzymology* / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D012343:RNA, Transfer; D020558:GTP Phosphohydrolases