Kibdelosporangium Persicum Sp. Nov., A New Member Of The Actinomycetes From A Hot Desert In Iran

Isolate 4NS15(T) was isolated from a neglected arid habitat in Kerman, Iran. The strain showed 16S rRNA gene sequence similarity values of 98.9 % to the type strains of Kibdelosporangium aridum subsp. aridum, Kibdelosporangium phytohabitans and Kibdelosporangium philippinense and 98.6 % to the type strain K. aridum subsp. largum, respectively. Genome-based phylogenetic analysis revealed that isolate 4NS15(T) is closely related to Kibdelosporangium aridum subsp. aridum DSM 43828(T). The digital DNA-DNA hybridization value between the genome sequences of 4NS15(T) and strain DSM 43828T is 29.8%. Strain 4NS15(T) produces long chains of spores without a sporangium-like structure which can be distinguished from other Kibdelosporangium species. Isolate 4NS15(T) has a genome size of 10.35 Mbp with a G+C content of 68.1 mol%. Whole-cell hydrolysates of isolate 4NS15(T) are rich in meso-diaminopimelic acid and cell-wall sugars such as arabinose, galactose, glucose and ribose. Major fatty acids (>10%) are C-16:0, iso-C-16:0 and iso-C-15:0. The phospholipid profile contains diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylhydroxyethanolamine, aminolipid and glycoaminolipid. The predominant menaquinone is MK-9(H-4). Based on its phenotypic and genotypic characteristics, isolate 4NS15(T) (NCCB 100701=CIP 111705=DSM 110728) merits recognition as representing a novel species of the genus Kibdelosporangium, for which the name Kibdelosporangium persicum sp. nov. is proposed.