Preliminary X-ray diffraction analysis of YcdB from Escherichia coli: a novel haem-containing and Tat-secreted periplasmic protein with a potential role in iron transport

Cartron, M. L., Mitchell, S., Woodhall, M. R., Andrews, S. C. ORCID: https://orcid.org/0000-0003-4295-2686 and Watson, K. A. ORCID: https://orcid.org/0000-0002-9987-8539 (2007) Preliminary X-ray diffraction analysis of YcdB from Escherichia coli: a novel haem-containing and Tat-secreted periplasmic protein with a potential role in iron transport. Acta Crystallographica Section F-Structural Biology and Crystallization Communications, 63. pp. 37-41. ISSN 1744-3091 doi: 10.1107/s174430910604509x

Abstract/Summary

YcdB is a periplasmic haem-containing protein from Escherichia coli that has a potential role in iron transport. It is currently the only reported haem-containing Tat-secreted substrate. Here, the overexpression, purification, crystallization and structure determination at 2.0 angstrom resolution are reported for the apo form of the protein. The apo-YcdB structure resembles those of members of the haem-dependent peroxidase family and thus confirms that YcdB is also a member of this family. Haem-soaking experiments with preformed apo-YcdB crystals have been optimized to successfully generate haem-containing YcdB crystals that diffract to 2.9 angstrom. Completion of model building and structure refinement are under way.