title: 11-fold symmetry of the trp RNA-binding attenuation protein (TRAP) from Bacillus subtilis determined by X-ray analysis.
abstract: The trp RNA-binding attenuation protein (TRAP) of Bacillus subtilis has been crystallized and examined by crystallography using X-ray synchrotron radiation diffraction data. Crystals of TRAP complexed with L-tryptophan belong to space group C2 with a = 156.8 A, b = 114.05 A, c = 105.9 A, beta = 118.2 degrees. Crystals of a potential heavy-atom derivative of TRAP complexed with 5-bromo-L-tryptophan grow in the same space group with similar cell dimensions. X-ray data for the native crystals and for the derivative have been collected to 2.9 A and 2.2 A resolution, respectively. Peaks in the self-rotation function and in the Patterson synthesis could only be explained by two 11-subunit oligomers (each formed by an 11-fold axis of symmetry) in the asymmetric unit lying with the 11-fold rotation axes parallel to each other. The consequence is that the TRAP molecule has 11-fold symmetry and contains 11 subunits.
authors.affiliation: Department of Chemistry, University of York, U.K.
authors.forename: A A
authors.initials: AA
authors.lastname: Antson
authors.forename: A M
authors.initials: AM
authors.lastname: Brzozowski
authors.forename: E J
authors.initials: EJ
authors.lastname: Dodson
authors.forename: Z
authors.initials: Z
authors.lastname: Dauter
authors.forename: K S
authors.initials: KS
authors.lastname: Wilson
authors.forename: T
authors.initials: T
authors.lastname: Kurecki
authors.forename: J
authors.initials: J
authors.lastname: Otridge
authors.forename: P
authors.initials: P
authors.lastname: Gollnick
mesh_terms: D001412:Bacillus subtilis / Q000737:chemistry* / Q000235:genetics; D001426:Bacterial Proteins / Q000737:chemistry* / Q000378:metabolism; D018360:Crystallography, X-Ray; D017357:Cyclotrons; D008956:Models, Chemical; D009876:Operon / Q000235:genetics; D011487:Protein Conformation; D012329:RNA, Bacterial / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000737:chemistry* / Q000378:metabolism; D014157:Transcription Factors / Q000737:chemistry* / Q000378:metabolism; D014364:Tryptophan / Q000031:analogs & derivatives / Q000737:chemistry
chemical_list: D001426:Bacterial Proteins; C079092:MtrB protein, Bacteria; D012329:RNA, Bacterial; D012333:RNA, Messenger; D016601:RNA-Binding Proteins; D014157:Transcription Factors; C066614:5-bromotryptophan; D014364:Tryptophan