Crystal Structure of a Light-Harvesting Protein C-Phycocyanin from Spirulina PlatensisPadyana, A.K., Bhat, V.B., Madyastha, K.M., Rajashankar, K.R., Ramakumar, S.
(2001) Biochem.Biophys.Res.Commun. 282: 893
- PubMed: 11352634
- DOI: 10.1006/bbrc.2001.4663
- PubMed Abstract:
- Crystal Structure of C-Phycocyanin from Cyanidium Caldarium Provides a New Perspective on Phycobilisome Assembly
Stec, B.,Troxler, R.F.,Teeter, M.M.
(1999) Biophys.J. 76: 2912
- Isolation, Crystallization, Crystal Structure Analysis and Refinement of Constitutive C-Phycocyanin from the Chromatically Adapting Cyanobacterium Fremyella Diplosiphon at 1.66 Angstrom Resolution
Duerring, M.,Schmidt, G.B.,Huber, R.
(1991) J.Mol.Biol. 217: 577
The crystal structure of C-phycocyanin, a light-harvesting phycobiliprotein from cyanobacteria (blue-green algae) Spirulina platensis has been solved by molecular replacement technique. The crystals belong to space group P2(1) with cell parameters a ...
The crystal structure of C-phycocyanin, a light-harvesting phycobiliprotein from cyanobacteria (blue-green algae) Spirulina platensis has been solved by molecular replacement technique. The crystals belong to space group P2(1) with cell parameters a = 107.20, b = 115.40, c = 183.04 A; beta = 90.2 degrees. The structure has been refined to a crystallographic R factor of 19.2% (R(free) = 23.9%) using the X-ray diffraction data extending up to 2.2 A resolution. The asymmetric unit of the crystal cell consists of two (alphabeta)6-hexamers, each hexamer being the functional unit in the native antenna rod of cyanobacteria. The molecular structure resembles that of other reported C-phycocyanins. However, the unique form of aggregation of two (alphabeta)6-hexamers in the crystal asymmetric unit, suggests additional pathways of energy transfer in lateral direction between the adjacent hexamers involving beta155 phycocyanobilin chromophores.
Department of Physics, Indian Institute of Science, Bangalore, 560 012, India.