Crystallization of cytochrome b562 from Erwinia chrysanthemi

• Published in: Acta crystallographica. Section D, Biological crystallography. Vol. 53; no. 2; pp. 197 - 199
• Main Authors: Wilkinson, K. W., Ford, G. C., Moir, A. J., Rice, D. W., Rodgers, H. F., Smith, J. M. A., Stillman, T. J., Goward, C. R.
• Format: Journal Article
• Language: English
• Published: 5 Abbey Square, Chester, Cheshire CH1 2HU, England International Union of Crystallography 01.03.1997
• ISSN: 1399-0047; 0907-4449; 1399-0047
• DOI: 10.1107/S0907444996011201

Cytochrome b562 from Erwinia chrysanthemi has been crystallized using the hanging‐drop vapour‐diffusion method with ammonium sulfate as the precipitant. X‐ray precession photographs show that the crystals formed belong to either of the enantiomorphic space groups P41212 or P43212 with the cell parameters a = b = 98.6 and c = 62.7 Å. Estimation of the crystal density and consideration of the possible values for Vm indicate that there is either a dimer or trimer in the asymmetric unit. Experiments using the synchrotron radiation source at the CCLRC Daresbury Laboratory have shown that the crystals diffract to at least 2.7 Å resolution. An analysis of the N‐terminal sequence indicates that this cytochrome shows limited homology to the cytochrome b562 from E. coli. Determination of the structure will therefore allow analysis of the relationship between these two proteins.