Here, we demonstrate a new link between plasmid carriage, biofilm formation, and eDNA for P. putida KT2440. The potential universality and molecular mechanism by which CDK inhibitor TOL carriage results in excess eDNA remains, so far, unresolved but do not appear to be related to enhanced cell lysis, and suggest secretion. Additional studies will be required to examine the exact mechanism of eDNA release and the nature of the released eDNA associated with TOL carriage in P. putida KT22440. This study was supported by an EC-FP6 Marie Curie Excellence Grant (MEXT-CT-2005-024004) to B.F.S. and the Villum Kan Rasmussen Center for Environmental and

Agricultural Microbiology. We thank N. Kroer and S. Molin for providing strains and plasmids, B.S. Lauritzen for plasmid tagging, and N. El Azhari for initial flow cell observations. Fig. S1. Observation of little and abundant pellicle formation in 5-day-old static cultures of Pseudomonas putida

KT2440 and KT2440. Fig. S2. Micrographs of 1–7-day-old click here Pseudomonas putida KT2440 pellicles, with and without TOL plasmid, grown in presence or absence of DNase I. Please note: Wiley-Blackwell is not responsible for the content or functionality of any supporting materials supplied by the authors. Any queries (other than missing material) should be directed to the corresponding author for the article. “
“Of the five dd-carboxypeptidases in Escherichia coli, only PBP5 demonstrates its physiological significance by maintaining cell shape and intrinsic beta-lactam resistance. DacD can partially compensate for the lost beta-lactam resistance in PBP5 mutant, although its biochemical reason is unclear. To understand the mechanism(s) underlying such behaviour, we constructed soluble DacD (sDacD) and compared its biophysical and (-)-p-Bromotetramisole Oxalate biochemical properties with those of sPBP5, in vitro. Unlike sPBP6, sDacD can deacylate Bocillin significantly, which is very similar to sPBP5. sDacD shows weak dd-carboxypeptidase activity, although lower than that of sPBP5. Bioinformatics analyses reveal a similar architecture of sPBP5 and sDacD. Therefore, based on the obtained results we can infer that biochemically

DacD and PBP5 are more closely related to each other than to PBP6, enabling DacD and PBP5 to play a nearly similar physiological function in terms of recovering the lost beta-lactam resistance. Of the five dd-carboxypeptidases (DD-CPases) in Escherichia coli, PBP4, PBP5, PBP6, DacD and AmpH (Holtje, 1998; Ghosh et al., 2008; Sauvage et al., 2008; Gonzalez-Leiza et al., 2011), only PBP5 has been studied thoroughly concerning enzymology, structure and physiological aspects (Nelson & Young, 2000; Nelson & Young, 2001; Chowdhury et al., 2010; Sarkar et al., 2010, 2011). However, other DD-CPases are mostly characterized on the basis of their kinetic properties in vitro (Korat et al., 1991; Chowdhury et al., 2010; Gonzalez-Leiza et al.