Browsing by Advisor "Mahadevan, S"
Now showing items 1-11 of 11
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Aromatic Beta-Glucoside Utilization In Shigella Sonnei : Comparison With The Escherichia Coli Paradigm
(2010-12-01)The aromatic beta-glucosides of plant origin, salicin and arbutin, serve as carbon sources for the sustenance of bacteria when ‘preferred’ sugars are absent in the environment. In the family Enterobacteriaceae, there are ... -
Deciphering the evolutionary significance of maintaining cryptic genetic systems by bacteria
Cryptic genes are phenotypically silent DNA sequences with the potential to code for a function, but remain inactive during the normal life span of the organism. However they can be activated by a single mutational event ... -
Evolution Of New Metabolic Functions By Mutations In Pre-Existing Genes : The chb Operon Of Escherichia Coli As A Paradigm
(2009-07-02)Escherichia coli has the ability to respond to stress such as starvation in a very efficient manner. Under conditions of starvation wherein a novel substrate is provided as a sole nutritional source, Spontaneous mutants ... -
Exploring the Evolution of Cellobiose Utilization in Shigella Sonnei And the Conservation of ChbG Orthologs in Eukaryotes
(2017-10-11)The chb operon constitutes the genes essential for utilization of chitooligosaccharides in Escherichia coli and related species. The six genes of the operon code for a transcriptional regulator (ChbR) of the operon, a ... -
Gene Expression During Cytokinin-Induced Haustoria Formation in Cuscuta Reflexa, Roxb
(Indian Institute of Science, 2005-04-19)How multicellular organisms develop from a single-celled fertilized egg or zygote that in no way resembles the adult form is one of the major challenges in biology The phase of rapid cell division that follows fertilization ... -
Hormones and Cuscuta Development Abscisic Acid And Its Conjugates-Endogenous Levels And Metabolism During Growth And Haustoria Formation
(Indian Institute of Science, 2005-04-25)Cuscuta or dodder is one of the best known higher plant parasite with around 158 species over 5 continents parasitising a wide variety of host plants (Yuncker,1932) Dodders are characterised by their interesting parasitic ... -
Investigations on the Possible Role of Aromatic β-Glucoside Metabolism in Self-Defense in Enterobacteriaceae
(2018-04-02)Bacteria are ubiquitous in all ecosystems and are often challenged by multiple stresses such as extreme temperatures, high salt concentrations, nutrient limitation, pH variations, radiation, predation and the presence of ... -
Investigations on the regulatory role of BglG on the expression of ridA and the pleiotropic effects of bglG deletion in E. coli
The bgl operon of E. coli encodes for the proteins involved in the uptake and catabolism of plant-derived aromatic beta-glucosides, normally associated with the soil environment. The silent state of the operon seen ... -
Investigations On The Role Of The Global Regulator H-NS In The Survival Of Escherichia Coli In Stationary-Phase
(2015-08-17)Studies on stationary phase cultures of microorganisms in the laboratory have helped us understand the genetic and physiological basis of adaptation in their natural habitats. Stasis or decline in bacterial populations due ... -
Regulation of Chitin Oligosaccharides Utilization in Escherichia Coli
(2018-04-11)The genome of Escherichia coli harbors several catabolic operons involved in the utilization of a wide variety of natural compounds as carbon sources. The chitobiose (chu) operons of E.coli Is involved in the utilization ... -
Studies on the Evolution of Aromatic Beta-Glucoside Catabolic Systems under Different Stress Conditions in Escherichia coli
(2017-11-22)The genetic systems involved in the utilisation of aromatic β-glucosides in E. coli consist of the bgl, asc, and chb operons and the locus bglA encoding phospho-β-glucosidase A. The bgl and asc operons are known as cryptic ...