Open AccessMarinobacter lipolyticus from Red Sea for lipase production and modulation of silver nanomaterials for anti‐candidal activities
Author(s) -
Oves Mohammad,
Qari Huda A.,
Felemban Nadeen M.,
Khan Mohammad Z.,
Rehan Zulfiqar A.,
Ismail Iqbal M.I.
Publication year - 2017
Publication title -
iet nanobiotechnology
Language(s) - English
Resource type - Journals
ISSN - 1751-875X
DOI - 10.1049/iet-nbt.2016.0104
Subject(s) - lipase , microbiology and biotechnology , chemistry , bacteria , candida albicans , silver nanoparticle , silver nitrate , nuclear chemistry , biochemistry , biology , enzyme , nanoparticle , nanotechnology , materials science , genetics
In this study, the bacterial strain CEES 33 was isolated from the coastal area of the Red Sea, Jeddah, Kingdom of Saudi Arabia. The bacterium isolate was identified and characterized by using biochemical and molecular methods. The isolate CEES 33 has been identified as Gram‐negative rod shaped and cream pigmented spherical colonies. It also demonstrated a positive result for nitrate reduction, oxidase, catalase, citrate utilization, lipase and exopolysaccharide production. Strain CEES 33 was characterized at the molecular level by partial 16S rRNA sequencing and it has been identified as Marinobacter lipolyticus (EMBL|LN835275.1). The lipolytic activity of the isolate was also observed 2.105 nkatml −1 . Furthermore, the bacterial aqueous extract was used for green synthesis of silver nanoparticles (AgNPs), which was further confirmed by UV‐visible spectra (430 nm), XRD and SEM analysis. Moreover, the biological functional group that involved in AgNPs synthesis was confirmed by FTIR spectra. The biological activities of AgNPs were also investigated, which showed a significant growth inhibition of Candida albicans with 16 ± 2 mm zone of inhibition at 10 μg dose/wells. Therefore, bacterium Marinobacter lipolyticus might be used in future for lipase production and nanoparticles fabrication for biomedical application, to control fungal diseases caused by C. albicans .