ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Shaza Y.A. Qattan1 and A.A. Khattab2
1Biological Sciences Dept., Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, Kingdom of Saudi Arabia.
2Genetics and Cytology Dept., National Research Centre, Dokki, Cairo, Egypt.
J Pure Appl Microbiol, 2019, 13 (3): 1489-1498 | Article Number: 5626 | © The Author(s). 2019
Received: 20/06/2019 | Accepted: 18/07/2019 | Published: 27/07/2019

N-methyl-N-nitro-N-nitrosoguanidine (NTG) mutagen was successfully used to induce hyper producing neomycin mutants. The neomycin-resistant mutants of Streptomyces albogriseolus, which harvested after treatment with NTG mutagen (100µg/ml) and growing with stress of neomycin (1.75 mg/ml), can produce neomycin with higher efficiency than the wild type strain. The T-40-22 mutant strain was the highest in neomycin production which gave 25 mm inhibition zone by using B. subtilis as the tester organism with 166.67 % relation to the wild type strain after tested of 85 mutants were examined after NTG-mutagenesis. When the above result on inhibition zone was compared with the standard data of neomycin concentrations in relation to inhibition area, the mutant T-40-22 which gave a 25 mm inhibition zone was produced 4.0 mg /mL of neomycin compared with 1.5 mg/mL neomycin of type wild strains and therefore the amount of neomycin production was reached to 2.66 folds of the mother strain production. In addition, the polymerase chain reaction (PCR) technique was applied to examine DNA fingerprint by three random primers on a number of excellent strains for neomycin production to link the genetic background of the tested mutants with the data obtained from the neomycin estimation compared to the wild type strain. Several different DNA fingerprints have been detected after random amplified polymorphic DNA (RAPD) analysis by PCR. Finally, phylogenetic analysis was used to divide the studied mutants into clusters which could reflect the genetic diversity of the new superior neomycin mutants.


Streptomyces albogriseolus, neomycin, NTG-mutagenesis, RAPD-PCR assay, phylogenetic analysis.

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© The Author(s) 2019. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.