1986 Volume 39 Issue 7 Pages 994-1000
An aminoglycoside hypersensitive mutant, Kp-126, was isolated from the aminoglycoside-resistant strain, Kp-8, of Klebsiella pneumoniae through selection using sorbistin, a nonaminocyclitol-aminoglycoside antibiotic. The mutant Kp-126 was approximately 100-fold more sensitive to sorbistin than the parent strain Kp-8. The mutant also showed hypersensitivityto various aminocyclitol-aminoglycoside antibiotics. K. pneumoniae Kp-126 was used in screening and a new aminoglycoside antibiotic, 3, 3'-neotrehalosadiamine (BMY-28251), was discovered in the fermentation broths of soil isolate strain of Bacillus pumilus.