To study the importance of arginine provision and phosphate limitation for synthesis and accumulation of cyanophycin (CGP) in Acinetobacter sp. strain ADP1, genes encoding the putative arginine regulatory protein (argR) and the arginine succinyltransferase (astA) were inactivated, and the effects of these mutations on CGP synthesis were analyzed. The inactivation of these genes resulted in a 3....

The prevalence of the currently known Acinetobacter species and related trends of antimicrobial resistance in a Dutch university hospital were studied. Between 1999 and 2006, Acinetobacter isolates from clinical samples were collected prospectively. Isolates were analyzed by amplified fragment length polymorphism fingerprinting. For species identification, a profile similarity cutoff level of 5...

Acinetobacter sp. strain A47, which has been recovered from several soft tissue samples from a patient undergoing reconstructive surgery due to a traumatic amputation, was categorized as a taxonomically unique bacterial strain. The molecular analysis based on three housekeeping protein-coding genes (16S rRNA, rpoB, and gyrB) showed that strain A47 does not belong to any of the hitherto known ta...

R300B-, RSF1010-, and RK2-derived plasmids were introduced into Acinetobacter sp. strain HO1-N and Acinetobacter calcoaceticus BD413 by transformation and conjugal mobilization. The transformation frequencies of BD413 were 4.2 X 10(6) to 6.3 X 10(6) transformants per micrograms of DNA per 10(9) recipient cells. Conjugal mobilization frequencies were 1.1 X 10(-1) to 8.5 X 10(-1) per recipient. A...

Results 69 pts (47 years, male 69%, SAPS II 33, mechanical ventilation 92%) developed 77 episodes (M 44, V 32). Neurosurgical diseases were trauma (39%), meningeal hemorrhage (20%), intracerebral hemorrhage (17%), intracranial tumor (12%). Cerebrospinal fluid leakage was present in 25%, ventriculostomy in 35% (catheter permanence 6.2 days), subdural catheter in 30% (catheter permanence 4.2 days...

Polyphosphate (polyP) is a ubiquitous biopolymer whose function and metabolism are incompletely understood. The polyphosphate kinase (PPK) of Acinetobacter sp. strain ADP1, an organism that accumulates large amounts of polyP, was purified to homogeneity and characterized. This enzyme, which adds the terminal phosphate from ATP to a growing chain of polyP, is a 79-kDa monomer. PPK is sensitive t...

A new phenol-degrading bacterium with high biodegradation activity and high tolerance of phenol, strain PD12, was isolated from the activated sludge of Tianjin Jizhuangzi Wastewater Treatment Facility in China. This strain was capable of removing 500 mg phenol/L in liquid minimal medium by 99.6% within 9 h and metabolizing phenol at concentrations up to 1100 mg/L. DNA sequencing and homologous ...

Statistical experimental designs provided by statistical analysis system (SAS) software were applied to optimize the fermentation medium composition for the production of atrazine-degrading Acinetobacter sp. DNS(32) in shake-flask cultures. A "Plackett-Burman Design" was employed to evaluate the effects of different components in the medium. The concentrations of corn flour, soybean flour, and ...

Biological oxidation of cyclic alcohols normally results in formation of the corresponding dicarboxylic acids, which are further metabolized and enter the central carbon metabolism in the cell. We isolated an Acinetobacter sp. from an industrial wastewater bioreactor that utilized cyclohexanol as a sole carbon source. A cosmid library was constructed from Acinetobacter sp. strain SE19, and oxid...

Acinetobacter sp. strain BD413 (= ATCC 33305), a nutritionally versatile bacterium, has an extremely efficient natural transformation system. Here we describe the generation of eight transformation-affected mutants of Acinetobacter sp. strain BD413 by insertional mutagenesis. These mutants were found by Southern blot analysis and complementation studies to result from single nptII marker insert...