Glycoprotein Prompted Plausible Bactericidal and Antibiofilm Outturn of Extracellular Polymers fromNostoc microscopicum.

Abstract:

:Nostoc microscopicum an effective extracellular polymers (EPs) synthesizer among cyanobacteria was isolated, and its elementary morphological features were defined with the aid of light microscope and CLSM. Bioseparation of EPs from 44 days-aged culture gave 0.90 g/L of the dry powdered extract. Chemical quantification of EPs showed the presence of 550 mg/g of carbohydrate and 395 mg/g of protein. HPLC results depicted the presence of mannose (monomer sugar), fucose (hexose deoxy sugar), mannitol (sugar alcohol) and N- acetylglucosamine (glycoprotein) in the EPs. The vibration-based spectrum produced by FT-IR proves the β-Sheet structure of EPs glycoprotein and the size as 45 kDa by performing SDS-PAGE. Bactericidal activity evaluation of EPs on Pseudomonas aeruginosa and Staphylococcus aureus co-expressed the MIC value as 125 μg/mL, while zone of inhibition was 12 mm for Gram-negative and 8 mm for Gram-positive bacteria. Biofilm inhibition assay was effective in 1.0 mg/mL concentration of EPs in both bacterial strains with a mean rate of 60 percentages which was further confirmed using confocal laser scanning microscopic imaging. This natural polymeric extract of Nostoc microscopicum indicates its possible applications in bactericidal and biofilm inhibition.

authors

Ramachandran L,Marappa N,Sethumadhavan K,Nooruddin T

doi

10.1007/s12010-019-03179-8

subject

Has Abstract

pub_date

2020-05-01 00:00:00

pages

284-298

issue

1

eissn

0273-2289

issn

1559-0291

pii

10.1007/s12010-019-03179-8

journal_volume

191

pub_type

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