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United States Department of Agriculture

Agricultural Research Service

Title: Crossiella Gen. NOV., a New Genus Related to Streptoalloteichus

Author
item Labeda, David

Submitted to: International Journal of Systematic and Evolutionary Microbiology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: March 1, 2001
Publication Date: N/A

Interpretive Summary: A previous study of a taxonomic group of soil bacteria indicated a strain which produces the novel antibiotic dopsisamine had been mis-classified at least twice. A detailed study of all of the properties of this strain, including morphology, chemical composition, and physiology, was undertaken to properly describe this new genus. The name Crossiella is proposed for this new genus in recognition of contributions of Thomas Cross, a distinguished microbiologist at the University of Bradford. The knowledge regarding the properties of this new genus will be valuable to biotechnologists searching for microorganisms capable of producing other new antibiotics or natural products.

Technical Abstract: Phylogenetic analysis of the genera within the suborder Pseudonocardineae based on almost complete sequences of 16S rDNA showed that Saccharothrix cryophilis NRRL B-16238T was misplaced within the genus Saccharothrix. S. cryophilis NRRL B-16238T appeared to be phylogenetically closest to Streptoalloteichus but is morphologically distinct from this genus because sporangia with motile spores are not observed. The aerial mycelium fragments into rod-shaped elements and sclerotium-like bodies are occasionally observed in the substrate mycelium. The cell wall contains meso-diaminopimelic acid, whole cell hydrolysates contain galactose, rhamnose and ribose, phospholipid pattern is type PIV, and the principal menaquinone is MK-9(H4). A new genus is proposed to be called Crossiella in recognition of the contributions of Thomas Cross, a distinguished actinomycete biologist at the University of Bradford. The type species is Crossiella cryophila gen. nov., comb. nov.

Last Modified: 12/20/2014
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