Bioactive metabolites produced by Streptomyces Cheonanensis VUK-A from Coringa mangrove sediments: isolation, structure elucidation and bioactivity.
The strain VUK-A was isolated from a sediment sample of the Coringa mangrove ecosystem was identified as Streptomyces cheonanensis based on morphological, physiological, biochemical and molecular properties. Chemical investigation of the secondary metabolites of the strain Streptomyces cheonanensis VUK-A has led to the segregation of two bioactive compounds, namely 2-Methyl butyl propyl phthalate (1) and Diethyl phthalate (2) using column chromatography. The chemical structure of the active compounds was established on the basis of spectroscopic analysis, including1H NMR and13C NMR spectroscopies, FTIR and EIMS. The antimicrobial activity of the bioactive compounds produced by the strain was tested against a wide variety of bacteria and fungi and expressed in terms of minimum inhibitory concentration. The compounds (1&2) were active against all the bacteria tested, and the best activity of compound 1 was recorded against Proteus vulgaris (4 µg/ml). Compounds (1&2) were active against dermatophytes and fungi but compound 1 displayed high antifungal activity against Candida albicans (8 µg/ml) and Fusarium solani (16 µg/ml) compared to standard antifungal agents. The cytotoxicity of the bioactive compound 1 was tested against MDA-MB-231, OAW-42, HeLa, and MCF-7 cell lines. The highest activity of 100 µM by compound 1 was recorded against HeLa cancer cell lines. In fact, this is the first report of 2-Methyl butyl propyl phthalate from the genus Streptomyces.
Department of Botany and Microbiology, Acharya Nagarjuna University, Nagarjunanagar, Guntur, 522510, Andhra Pradesh, India.
Ushakiranmayi
U
Mangamuri
Department of Botany and Microbiology, Acharya Nagarjuna University, Nagarjunanagar, Guntur, 522510, Andhra Pradesh, India. profmvl08@gmail.com.
Vijayalakshmi
V
Muvva
Department of Biotechnology, Acharya Nagarjuna University, Guntur, 522510, Andhra Pradesh, India.
Sudhakar
S
Poda
Department of Botany and Microbiology, Acharya Nagarjuna University, Nagarjunanagar, Guntur, 522510, Andhra Pradesh, India.
Krishna
K
Naragani
Department of Botany and Microbiology, Acharya Nagarjuna University, Nagarjunanagar, Guntur, 522510, Andhra Pradesh, India.
Rajesh Kumar
RK
Munaganti
Organic Chemistry Division-I, Indian Institute of Chemical Technology, Hyderabad, 500007, India.
Bhujangarao
B
Chitturi
Organic Chemistry Division-I, Indian Institute of Chemical Technology, Hyderabad, 500007, India.
Venkateswarlu
V
Yenamandra
Antimicrobial activity; Bioactive compounds; Cytotoxicity; Mangrove ecosystem; Streptomyces cheonanensis