Browsing by Advisor "Nagaraja, V"
Now showing items 1-20 of 25
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Altering DNA topology in mycobacteria: impact of perturbation of DNA gyrase on physiology and gene expression
In the current dissertation, efforts have been made to probe the in vivo role of DNA gyrase to determine its importance in the growth, physiology and gene expression in mycobacteria. In this dissertation, the role of DNA ... -
Cell Survival Strategies : Role Of Gyrase Modulatory Proteins
(2010-07-21)A steady state level of negative supercoiling is essential for chromosome condensation, initiation of replication and subsequent elongation step. DNA gyrase, found in every eubacteria, serves the essential housekeeping ... -
DNA Gyrase And Topo NM From Mycobacteria : Insights into Mechanism And Drug Action
(2017-10-26)Maintenance of a topological homeostasis by introduction and removal of the supercoils to relieve excessive strain on the DNA is a hallmark of topoisomerase function in the cell. The requirement of the topoisomerases during ... -
Evolutionary Design Of Active Site Plasticity In R.KpnI For Promiscuity In Metal Ion Utilization And Substrate Recognition
(2013-03-27)Restriction modification (R-M) systems are important components of the prokaryotic arsenal against invading genomes. R-M systems directly target the foreign DNA and are often considered as primitive immune systems in ... -
Exploring the roles of nucleoid-associated protein HU and two of its interacting proteins in Mycobacterium tuberculosis pathogenesis
Embargo up to Jan 29, 2026 The genome in prokaryotes is restricted to a membrane-less compartment termed nucleoid. The genome is maintained in the compacted state within the nucleoid with the help of three key cellular ... -
Exploring the Unusual Properties and Non-canonical Roles of Promiscuous Restriction Endonuclease KpnI
Restriction modification (RM) systems are important components of bacterial immune system. Their primary function is to protect the bacteria from invading bacteriophages. Based on the subunit composition, enzyme properties ... -
Insights into Occurrence and Divergence of Intrinsic Terminators and Studies on Rho-Dependent Termination in Mycobacterium Tuberculosis
(2018-04-11)Two mechanisms, intrinsic and factor-dependent, have evolved for accomplishing the termination of transcription in eubacteria. In this thesis, the first chapter is an introduction to the topic that presents what is known ... -
Insights into the Regulation of Transcription Initiation of DNA Gyrase and Role of Transcription Factor Gre from Mycobacterium tuberculosis
Genus Mycobacterium comprises a large number of species including many pathogens such as Mycobacterium leprae, Mycobacterium abscessus and Mycobacterium tuberculosis (Mtb), the last one is the causative agent of the fatal ... -
Insights Into Transcription-Repair Coupling Factor From Mycobacterium Tuberculosis
(2014-12-01)Introduction Nucleotide excision repair (NER) is a highly conserved pathway involved in repair of a wide variety of structurally unrelated DNA lesions. One of the well characterized NER systems is from E. coli which ... -
Mechanism Of Activation Of Bacteriophage Mu Late Genes By Transcription Activator Protein C
(2013-01-24)Initiation of transcription is a major step in the regulation of gene expression. A dominant theme in regulation of gene expression lies in understanding the mechanism involved in selective expression of the genes in ... -
Mechanism Of mom Gene Transactivation By Transcription Factor C Of Phage MU
(Indian Institute of Science, 2007-04-26)Regulation of transcription initiation is the major determining event employed by the cell to control gene expression and subsequent cellular processes. The weak promoters, with low basal transcription activities, are ... -
Mycobacterial topoisomerases: insights into structure, mechanism and function
DNA encounters topological constraints during essential cellular processes such as replication, transcription, and chromosome segregation. To ensure facile execution of these processes, a ubiquitous class of enzymes known ... -
New Active Site Fold And The Role Of Metal Ions In Structure Function Relationship Of A Promiscuous Endonuclease - R.KpnI
(2010-07-08)Bacteria employ survival strategies to protect themselves against foreign invaders, including bacteriophages. The ‘immune system’ of bacteria relies mostly on restriction-modification (R-M) systems. The primary role of R-M ... -
Nucleoid-associated Proteins of Mycobacterium tuberculosis : Insights into their Functions
Bacteria face the challenging task of compacting their chromosomes to accommodate them in a small cytoplasmic volume and at the same time maintaining the nucleoids in a highly organized and dynamic state for transcription, ... -
Post translational modification and DNA binding studies with two nucleoid associated proteins of Mycobacterium tuberculosis
Genome in prokaryotes is found in a small confinement called nucleoid. The nucleoid compaction is brought about by the combined action of topoisomerases and Nucleoid associated proteins (NAPs). Topoisomerases maintain ... -
Studies On DNA Gyrase From Mycobacteria : Insights Into Its Mechanism Of Action And Elucidation Of Its Interaction With The Transcription Machinery
(2010-09-30)Packaging of genomic DNA by proteins and super coiling into chromatin and chromatin-like structures (in bacteria) influences nearly all nuclear process such as replication, transcription, repair, and recombination. A ... -
Therapeutic Applications of Biodegradable Chitosan Based Polyelectrolyte Nanocapsules
(2018-01-18)The past few years have witnessed significant work being directed towards drug delivery systems with layer-by layer (LbL) technique prominently featured as one of the most sought after approach. However, majority of the ... -
Topoisomerase i from mycobacterium tuberculosis : Dynamics of enzyme function and inhibitor development
Inside the bacterial cell, the genetic material is maintained in a negatively supercoiled state within a compact space. The supercoiling of the genome undergoes topological perturbations during a variety of cellular processes ... -
Topoisomerases from Mycobacteria : Insights into the Mechanism, Regulation and Global Modulatory Functions
(2018-03-09)The eubacterial genome is maintained in a negatively supercoiled state which facilitates its compaction and storage in a small cellular space. Genome supercoiling can potentially influence various DNA transaction processes ...