Chryseobacterium rigui sp. nov., isolated from an estuarine wetland.
A bacterium, designated strain CJ16(T), was isolated from the estuarine wetland of the Han River. Cells of the isolate were yellow-pigmented, Gram-stain-negative, non-motile and rod-shaped. Growth of strain CJ16(T) was observed in TSB at 5-37 °C (optimum 30 °C), at pH 5.0-9.0 (optimum pH 6.0) and with 0-3 % (w/v) NaCl (optimum 0 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain CJ16(T) was most closely related to Chryseobacterium hagamense KCTC 22545(T) (97.2 % 16S rRNA gene sequence similarity). Genomic relatedness based on DNA-DNA hybridization between strain CJ16(T) and C. hagamense KCTC 22545(T) was 23 % (strain CJ16(T) as probe) and 19 % (strain KCTC 22545(T) as probe). Chemotaxonomic analysis revealed that strain CJ16(T) possessed MK-6 as the major isoprenoid quinone and sym-homospermidine as the predominant polyamine. The predominant fatty acids were iso-C15 : 0 (26.9 %), iso-C17 : 0 3-OH (16.8 %) and summed feature 9 (comprising C16 : 0 10-methyl and/or iso-C17 : 1ω9c; 10.5 %). The DNA G+C content of strain CJ16(T) was 37.9 mol%. Based on phenotypic, genotypic and phylogenetic studies, strain CJ16(T) represents a novel species of the genus Chryseobacterium, for which the name Chryseobacterium rigui sp. nov. is proposed. The type strain is CJ16(T) ( = KACC 16560(T)  = JCM 18078(T)).
Department of Biotechnology (BK21 Program), Chung-Ang University, Anseong 456-756, Republic of Korea.
Sung-Joon
SJ
Park
Department of Biotechnology (BK21 Program), Chung-Ang University, Anseong 456-756, Republic of Korea.
Jung-Hye
JH
Choi
Department of Biotechnology (BK21 Program), Chung-Ang University, Anseong 456-756, Republic of Korea.
Chang-Jun
CJ
Cha
D015373:Bacterial Typing Techniques; D001482:Base Composition; D045247:Chryseobacterium / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D004269:DNA, Bacterial / Q000235:genetics; D063366:Estuaries; D005227:Fatty Acids / Q000032:analysis; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D056910:Republic of Korea; D045483:Rivers / Q000382:microbiology; D017422:Sequence Analysis, DNA; D013095:Spermidine / Q000031:analogs & derivatives / Q000032:analysis; D024482:Vitamin K 2 / Q000031:analogs & derivatives / Q000032:analysis; D053833:Wetlands
D004269:DNA, Bacterial; D005227:Fatty Acids; D012336:RNA, Ribosomal, 16S; C007961:sym-homospermidine; D024482:Vitamin K 2; C042455:menaquinone 6; D013095:Spermidine