Download MendeleyThe structure of plastocyanin from the cyanobacterium Phormidium laminosum.
Bond, C.S., Bendall, D.S., Freeman, H.C., Guss, J.M., Howe, C.J., Wagner, M.J., Wilce, M.C.(1999) Acta Crystallogr D Biol Crystallogr 55: 414-421
- PubMed: 10089349
- DOI: https://doi.org/10.1107/s0907444998012074
- Primary Citation of Related Structures:
1BAW - PubMed Abstract:
The crystal structure of the 'blue' copper protein plastocyanin from the cyanobacterium Phormidium laminosum has been solved and refined using 2.8 A X--ray data. P. laminosum plastocyanin crystallizes in space group P43212 with unit-cell dimensions a = 86.57, c = 91.47 A and with three protein molecules per asymmetric unit. The final residual R is 19.9%. The structure was solved using molecular replacement with a search model based on the crystal structure of a close homologue, Anabaena variabilis plastocyanin (66% sequence identity). The molecule of P. laminosum plastocyanin has 105 amino-acid residues. The single Cu atom is coordinated by the same residues - two histidines, a cysteine and a methionine - as in other plastocyanins. In the crystal structure, the three molecules of the asymmetric unit are related by a non-crystallographic threefold axis. A Zn atom lies between each pair of neighbouring molecules in this ensemble, being coordinated by a surface histidine residue of one molecule and by two aspartates of the other.
Organizational Affiliation:
Department of Biochemistry, University of Sydney, NSW 2006, Australia.
