Cell-cell signaling in Xanthomonas campestris involves an HD-GYP domain protein that functions in cyclic di-GMP turnover.
Proceedings of the National Academy of Sciences of the United States of America (2006) - Comments
doi: 10.1073/pnas.0600345103  pubmed: 16611728  pmc: PMC1458946 

Robert P Ryan, Yvonne Fouhy, Jean F Lucey, Lisa C Crossman, Stephen Spiro, Ya-Wen He, Lian-Hui Zhang, Stephan Heeb, Miguel Camara, Paul Williams, J. M. Dow