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G KRISHNAMOORTHY
Articles written in Journal of Biosciences
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Volume 16 Issue 1-2 June 1991 pp 21-28
Histidine-15 and lytic activity of lysozyme
Madhuri M Ugrankar G Krishnamoorthy Bala S Prabhananda
The literature data on the activity of histidine-15 modified hen egg white lysozyme are conflicting: the modified enzyme is reported to have more activity, similar activity or less activity by different authors. Amino acid analysis had shown modification of the single His-15. Detailed activity studies on His-15-modified (by iodoacetic acid or diethyl pyrocarbonate) lysozyme have shown that the contradicting reports are due to the specific choices of ionic strengths and cell wall substrate concentrations and can be attributed to the substrate being negatively charged. Our analysis suggests that even though histidine-15 is far removed from the active site of lysozyme, its chemical modification or binding of the negatively-charged substrate near it, changes the conformation around the active site. However, the change in the optimum activity on chemically modifying His-15 is small.
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Volume 43 Issue 3 July 2018 pp 555-567 Article
Fluorescence spectroscopy for revealing mechanisms in biology: Strengths and pitfalls
This article describes the basic principles of steady-state and time-resolved fluorescence. The formal equivalence of the twomethodologies is described first, followed by the extra advantages of time-resolved methods in revealing populationheterogeneity in complex systems encountered in biology. Several examples from the author’s work are described insupport of the above contention. Finally, several misinterpretations and pitfalls in the interpretation of fluorescence data andtheir remedy are described.
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Journal of Biosciences
Volume 48, 2023
All articles
Continuous Article Publishing mode
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Journal of Biosciences | News
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To trigger further research on plant mitochondria, the Journal of Biosciences is bringing out a special issue titled "Plant Mitochondria: Properties and Interactions with Other Organelles".
Plant mitochondria are quite distinct and have unique features, such as a cyanide-insensitive alternate pathway. They also interact with chloroplasts to optimize photosynthetic carbon assimilation.
Submissions are welcome until 30 July 2023. The contributions can be original articles, short communications, reviews, or mini-reviews on any topic related to plant mitochondria.
Authors can submit their articles online at https://www.editorialmanager.com/jbsc/default2.aspx
Posted on April 12, 2023< -
Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
Forthcoming Special issue.
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