Hahella chejuensis KCTC 2396

Names Hahella chejuensis KCTC 2396
Accession numbers NC_007645
Background Hahella chejuensis strain KCTC 2396 is a marine red-pigmented gammaproteobacterium belonging to the Oceanospiralles clade. It was originally isolated from the coastal marine sediment of the southernmost island in Korea. It consists of a single circular chromosome and contains 6783 predicted genes. H.chejuensis is a heterotrophic organism living on various resources from mineral to organic materials and even other aquatic organisms. It produces a red pigment, identified as prodigiosin, which has a very efficient lytic activity against the dinoflagellate Cochlodinium polykrikoides. Increases in the population of certain dinoflagellates result in phenomena called algal blooms or red tides, which have become more frequent in recent years throughout the world in the coastal waters. Red tides affect the health of human and marine organisms but also regional economies and marine ecosystems. Hahella chejuensis possesses a complete repertoire of enzyme for central carbon metabolism, including glycolysis, pentose phosphate pathway and TCA cycle as well as those required for biosynthesis of nucleotides and 20 amino acids. Two sets of genes coding for flagellar biosynthesis, type III secretion systems and F0F1-type ATP synthesis have been identified. This multiplicity is more likely to originate from horizontal transfer rather than from a gene duplication inside H.chejuensis genome. Horizontal gene transfer seems to have played an essential role in shaping H.chejuensis as it appears to have at least 69 genomic islands. (EBI Integr8)
Strain KCTC 2396
Complete Yes
Sequencing centre (15-DEC-2005) National Center for Biotechnology Information, NIH, Bethesda, MD 20894, USA
(18-OCT-2005) Genome Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon Yuseong
Sequencing quality Level 6: Finished
Sequencing depth NA
Sequencing method NA
Isolation site "Marine sediment from Cheju Island, Republic of Korea"
Isolation country Korea
Number of replicons 1
Gram staining properties Negative
Shape Bacilli
Mobility Yes
Flagellar presence Yes
Number of membranes 2
Oxygen requirements Facultative
Optimal temperature NA
Temperature range Mesophilic
Habitat Aquatic
Biotic relationship Free living
Host name NA
Cell arrangement NA
Sporulation NA
Metabolism NA
Energy source Heterotroph
Diseases NA
Pathogenicity No