@article{mbs:/content/journal/ijsem/10.1099/ijsem.0.004806, author = "Sefrji, Fatmah O. and Marasco, Ramona and Michoud, Grégoire and Seferji, Kholoud A. and Merlino, Giuseppe and Daffonchio, Daniele", title = "Kaustia mangrovi gen. nov., sp. nov. isolated from Red Sea mangrove sediments belongs to the recently proposed Parvibaculaceae family within the order Rhizobiales", journal= "International Journal of Systematic and Evolutionary Microbiology", year = "2021", volume = "71", number = "5", pages = "", doi = "https://doi.org/10.1099/ijsem.0.004806", url = "https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.004806", publisher = "Microbiology Society", issn = "1466-5034", type = "Journal Article", keywords = "mangrove", keywords = "Kaustia", keywords = "cultivation", keywords = "Rhizobiales", keywords = "osmoadaptation", keywords = "Red Sea sediment", keywords = "diffusion chamber", eid = "004806", abstract = "We isolated a novel strain, R1DC25T, described as Kaustia mangrovi gen. nov. sp. nov. from the sediments of a mangrove forest on the coast of the Red Sea in Saudi Arabia. This isolate is a moderately halophilic, aerobic/facultatively anaerobic Gram-stain-negative bacterium showing optimum growth at between 30 and 40 °C, at a pH of 8.5 and with 3–5 % NaCl. The genome of R1DC25T comprises a circular chromosome that is 4 630 536 bp in length, with a DNA G+C content of 67.3 mol%. Phylogenetic analyses based on the 16S rRNA gene sequence and whole-genome multilocus sequence analysis of 120 concatenated single-copy genes revealed that R1DC25T represents a distinct lineage within the family Parvibaculaceae in the order Rhizobiales within the class Alphaproteobacteria . R1DC25T showing 95.8, 95.3 and 94.5 % 16S rRNA gene sequence identity with Rhodoligotrophos appendicifer , Rhodoligotrophos jinshengii and Rhodoligotrophos defluvii , respectively. The predominant quinone was Q-10, and the polar lipids were phosphatidylglycerol, phosphatidylcholine, diphosphatidylglycerol, as well as several distinct aminolipids and lipids. The predominant cellular fatty acids were C19 : 0 cyclo ω8c, a combination of C18 : 1 ω7c and/or C18 : 1 ω6c and C16 : 0. On the basis of the differences in the phenotypic, physiological and biochemical characteristics from its known relatives and the results of our phylogenetic analyses, R1DC25T (=KCTC 72348T;=JCM 33619T;=NCCB 100699T) is proposed to represent a novel species in a novel genus, and we propose the name Kaustia mangrovi gen. nov., sp. nov. (Kaustia, subjective name derived from the abbreviation KAUST for King Abdullah University of Science and Technology; mangrovi, of a mangrove).", }