Enzymatic analysis, structural study and molecular docking of laccase and catalase from B. subtilis SK1 after textile dye exposure

2018 ◽  
Vol 48 ◽  
pp. 269-280 ◽  
Author(s):  
Suhas K. Kadam ◽  
Asif S. Tamboli ◽  
Susmit B. Sambhare ◽  
Byong-Hun Jeon ◽  
Sanjay P. Govindwar
2019 ◽  
Vol 13 (4) ◽  
pp. 268-276
Author(s):  
Sridevi Ayla ◽  
Monika Kallubai ◽  
Suvarnalatha Devi Pallipati ◽  
Golla Narasimha

Background:Laccase, a multicopper oxidoreductase (EC: 1.10.3.2), is a widely used enzyme in bioremediation of textile dye effluents. Fungal Laccase is preferably used as a remediating agent in the treatment and transformation of toxic organic pollutants. In this study, crude laccase from a basidiomycetes fungus, Phanerochaete sordida, was able to decolorize azo, antroquinone and indigoid dyes. In addition, interactions between dyes and enzyme were analysed using molecular docking studies.Methods:In this work, a white rot basidiomycete’s fungus, Phanerochaete sordida, was selected from forest soil isolates of Eastern Ghats, and Tirumala and lignolytic enzymes production was assayed after 7 days of incubation. The crude enzyme was checked for decolourisation of various synthetic textile dyes (Vat Brown, Acid Blue, Indigo, Reactive Blue and Reactive Black). Molecular docking studies were done using Autodock-4.2 to understand the interactions between dyes and enzymes.Results:Highest decolourisation efficiency was achieved with the crude enzyme in case of vat brown whereas the lowest decolourisation efficiency was achieved in Reactive blue decolourisation. Similar results were observed in their binding affinity with lignin peroxidase of Phanerochaete chrysosporium through molecular docking approach.Conclusion:Thus, experimental results and subsequent in silico validation involving an advanced remediation approach would be useful to reduce time and cost in other similar experiments.


2021 ◽  
Author(s):  
Riad Hanachi ◽  
Ridha Ben Said ◽  
Hamza Allal ◽  
Seyfeddine Rahali ◽  
Mohammed A. M. Alkhalifah ◽  
...  

We performed a structural study followed by a theoretical analysis of the chemical descriptors and the biological activity of a series of 5-thiophen-2-yl pyrazole derivatives as potent and selective Cannabinoid-1...


2021 ◽  
Vol 498 (2) ◽  
pp. 104-111
Author(s):  
I. V. Ozhogin ◽  
V. V. Tkachev ◽  
A. S. Kozlenko ◽  
A. D. Pugachev ◽  
M. B. Lukyanova ◽  
...  

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2574
Author(s):  
Raquel Soengas ◽  
Marcos Lorca ◽  
Begoña Pampín ◽  
Víctor M. Sánchez-Pedregal ◽  
Ramón J. Estévez ◽  
...  

We present the synthesis and structural study of a new peptidomimetic of morphiceptin, which can formally be considered as the result of the replacement of the central proline residue of this natural analgesic drug with a subunit of (1S,2R,3S,4S,5R)-2-amino-3,4,5-trihydroxycyclopentane-1-carboxylic acid, previously obtained from L-idose. An optimized synthesis of this trihydroxylated cispentacin derivative is also reported. Molecular docking calculations on the target receptor support a favorable role of the hydroxy substituents of the non-natural β-amino acid incorporated into the peptidomimetic.


2020 ◽  
Vol 6 (1) ◽  
pp. 73-83
Author(s):  
Simone Queiroga Brito Gonçalves ◽  
Eloi Alves Da Silva Filho ◽  
Osmair Vital De Oliveira ◽  
Arlan da Silva Gonçalves

Many virus need their sulphydryl groups to be reduced in order to be allowed to enter cells. SARS-CoV-2, which belongs to Coronaviridae family and is responsible for coronavirus disease 2019 or COVID-19, has cysteine-rich proteins in its capsid as the main CoV protease (MPRO), which must be intact and active maintaining the viral activity. Considering that MPRO is an important molecular target for development of antiviral drugs, this work motivation was the structural study of the possible ways of interaction between drugs and viral cysteines by molecular docking technique for design of new potential inhibitors of MPRO and its virulence.


2018 ◽  
Vol 117 ◽  
pp. 752-761 ◽  
Author(s):  
Sameh Sellami ◽  
Sonia Jemli ◽  
Nouha Abdelmalek ◽  
Marwa Cherif ◽  
Lobna Abdelkefi-Mesrati ◽  
...  

Molecules ◽  
2017 ◽  
Vol 22 (11) ◽  
pp. 1863 ◽  
Author(s):  
Muhammad Kashif ◽  
Antonio Moreno-Herrera ◽  
Juan Villalobos-Rocha ◽  
Benjamín Nogueda-Torres ◽  
Jaime Pérez-Villanueva ◽  
...  

Author(s):  
James R. Gaylor ◽  
Fredda Schafer ◽  
Robert E. Nordquist

Several theories on the origin of the melanosome exist. These include the Golgi origin theory, in which a tyrosinase-rich protein is "packaged" by the Golgi apparatus, thus forming the early form of the melanosome. A second theory postulates a mitochondrial origin of melanosomes. Its author contends that the melanosome is a modified mitochondria which acquires melanin during its development. A third theory states that a pre-melanosome is formed in the smooth or rough endoplasmic reticulum. Protein aggregation is suggested by one author as a possible source of the melanosome. This fourth theory postulates that the melanosome originates when the protein products of several genetic loci aggregate in the cytoplasm of the melanocyte. It is this protein matrix on which the melanin is deposited. It was with these theories in mind that this project was undertaken.


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