title: Purification and crystallization of the light harvesting LH1 complex from Rhodobacter sphaeroides.
abstract: The LH1 light harvesting complex has been purified from a mutant of the photosynthetic bacterium Rhodobacter sphaeroides which synthesizes LH1 as the sole pigment protein. Crystallization trials using polyethylene glycol as the precipitant in the presence of the detergent n-octyl glucoside have resulted in the formation of needle like crystals which diffract beyond 3.5 A and which are relatively resistant to radiation damage. X-ray photographs have established that the crystals belong to the tetragonal system and are probably in space group P4(2)2(1)2. Estimates of the crystal density indicate that the asymmetric unit of the crystals contains two oligomers each with an alpha 6 beta 6 stoichiometry.
authors: Krebs Institute for Biomolecular Research, Department of Molecular Biology and Biotechnology, University of Sheffield, U.K.
authors: R S
authors: RS
authors: Nunn
authors: P J
authors: PJ
authors: Artymiuk
authors: P J
authors: PJ
authors: Baker
authors: D W
authors: DW
authors: Rice
authors: C N
authors: CN
authors: Hunter
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry* / Q000302:isolation & purification; D003460:Crystallization; D005960:Glucosides; D008565:Membrane Proteins / Q000737:chemistry* / Q000302:isolation & purification; D010788:Photosynthesis; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry*; D011092:Polyethylene Glycols; D012242:Rhodobacter sphaeroides / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D001426:Bacterial Proteins; D005960:Glucosides; D008565:Membrane Proteins; D045322:Photosynthetic Reaction Center Complex Proteins; C018619:octyl-beta-D-glucoside; D011092:Polyethylene Glycols