RESUMO
Diseases and epidemics in the current days need new types of antibiotics in order to be able to eliminate them. The goal of this research is to use metagenomics to identify isolated utilitarian gene (s) as antimicrobial specialists. Collection of diverse locations from sea sediment samples from Alexandria and extraction of total DNA, restriction enzyme fragmentation, cloning into pUC19 vector, and expression of the isolated gene(s) in E. coli DH5α were all part of the process. Characterization of Antimicrobial agent was done for the best clone for antimicrobial agent's production to detect efficiency, optimum pH, thermal stability, pH stability, effect of different compounds on antimicrobial activity, and residual activity of product after preservation in room temperature. Amino acid sequence of RSMM C3 gene (1250 bp) was 72% identity with Herbaspirillum sp. The ideal temperature level of the RSMM C3 antimicrobial agent production was 36 °C. The antimicrobial agent RSMM C3's stability was stable at -20 °Celsius for up to two months without thawing. The antibacterial agent RSMM C3 was stable at 4 °C for 14 days without loss in activity. The ideal pH level of the RSMM C3 antimicrobial agent was 6. Remain activity was gradually decreased at pH 5, 6, 6.5 and 7 (86.1, 96.9, 97.2 and 94.9%, respectively). On the other hand, residual activity was (92 and 84%) at (pH 7.5 and 8) for 8 days. The tested antimicrobial RSMM C3 was stable against 1 mM of different compounds (DMSO, Glycerol, NaCl, CaCl2, MgCl2, ZnCl2, FeSO4, MnSO4 and CuSO4). The research provides for the Metagenomics technique that has the ability for the production of novel antimicrobial agents produced by clone RSMM C3 which has a wide spectrum activity towards different microorganisms comparing to other antibiotics as Ampicillin and Tetracycline.