Division of Biological Sciences: Recent submissions
Now showing items 201-220 of 1030
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Role of Mycobacterium tuberculosis UvrD1 and UvrD2 helicases in resolving G-quadruplex DNA structures
Unresolved G-quadruplex (G4) DNA secondary structures impede DNA replication and can lead to DNA breaks and to genome instability. Helicases are known to unwind G4 structures and thereby facilitate genome duplication. ... -
PP2A-phosphatase and Polo-like kinase 1 regulates spindle positioning by orchestrating the cortical levels of the dynein adaptor NuMA
The mitotic spindle is a microtubule-based diamond shape structure that captures chromosomes and facilitates their segregation during anaphase. Proper positioning of the mitotic spindle is critical for defining the ... -
Collective escape dynamics of fission-fusion groups in the wild
Collective movement is a fundamental process affecting the survival and reproductive success of group-living animals. Many of the hypothesized benefits of grouping such as predation evasion and foraging efficiency may ... -
Structural and DNA binding properties of ARID domains present in hSWI/SNF chromatin remodeling complex subunits
The SWI/SNF complexes are multisubunit-containing protein complexes that are involved in chromatin-remodeling processes in the eukaryotic cells. In higher eukaryotes, SWI/SNF complexes contain one or more mutually exclusive ... -
Translational readthrough of AGO1 mRNA and its regulation by let-7a microRNA
During translation, the message encoded in mRNAs is decoded by ribosomes to synthesize proteins following strict canonical decoding rules. This process is tightly regulated and several mechanisms exist in cells that ensure ... -
Roles of the ribosomal protein uS12 and the initiation factor 3 in the maintenance of fidelity of translation in Escherichia coli
The flow of genetic information within biological systems according to the central dogma of molecular biology entails protein synthesis as the last step towards deciphering the message encrypted in the genetic code in ... -
Solution structures and conformational isomerism of novel conopeptides from Indian marine cone snails
This thesis describes the structure determination of peptides found in marine cone snails’ venom at atomic resolution and their biological activity. Chapter 1 gives a brief introduction to the cone snails, conopeptides, ... -
Ageing associated altered host response to bacterial infection
Chapters in which I have elucidated and elaborately described how senescence alters the cellular response to infection, here I demonstrate how senescence in multiple tissues simultaneously contribute to pathogen spread and ... -
Multiple routes to tackling drug-resistant tuberculosis: Systems modeling to unravel resistance mechanisms, drug combinations, and novel host-based biomarkers
Tuberculosis (TB) has been a major public health problem. The successful treatment of TB requires long-term (6-months) multi-drug chemotherapy, but poor patient compliance and non-adherence lead to the evolution of ... -
Stop codon readthrough in MTCH2 mRNA and its role in mitochondrial physiology
Stop codon readthrough is the process in which translation continues beyond a stop codon till a downstream, in-frame stop codon generating a polypeptide with a C-terminal extension. MTCH2 was selected as a potential ... -
Territorial and mating strategies of males in a lekking population of blackbuck Antilope cervicapra
Territoriality associated with lek-mating systems is unique in that males defend small, heavily clustered territories that lack resources usually thought to attract females, such as food and water. Females visit these male ... -
A Phylogenetic Perspective on The Phytogeography of Western Ghats
I used a finer scale data of 156 published plots across the entire latitudinal range of WG, covering most of the protected forests. The pruned phylogeny for this study consisted of 367 species, of which ~ 50% are taxa endemic ... -
CcdB : Stability, folding and application to design novel antibacterials
The primary amino acid sequence typically dictates the ultimate conformation of the protein. Mutations in the sequence demonstrate neutral, positive or negative effects on the structure-function relationship of the protein. ... -
Investigation of RAG1 in lymphoid and brain cells: Understanding mechanism and regulation
In summary, we show that RAG1 expression is regulated through a novel miRNA (miR- 29c) mediated mechanism and establish that as an additional mode of RAG1 regulation. Studies described in the thesis reveal that among the ... -
Interactions between host cellular factors and Rotaviral viroplasmic non-structural proteins NSP5, NSP2 and their influence on virus replication
Overall, the present study demonstrates the dynamic nature of rotavirus viroplasm and how it manipulates the intracellular environment by intracellular relocalization of host proteins and their sequestration in viroplasms ... -
Pathogen-derived volatiles modulate flight or fight response in Caenorhabditis elegans
In nature, the interaction between two organisms largely relies on their ability to sense and respond to each other, which involves many specific chemicals and signaling pathways. Animals have evolved mechanisms to detect ... -
Understanding the role of arginine clusters in β-hairpin antimicrobial peptides
The work described in this thesis describes the role of arginine clusters and the importance of their position in B-hairpin antimicrobial peptides. Here, we have tried to explore the role of guanidinium groups in the ... -
Structural and Functional Investigation of a Multi-drug Efflux Transporter QacA
The emergence of multi-drug resistance in bacteria is a global health care challenge. One of the effective means of gaining antimicrobial resistance, among superbugs, is through expression of efflux pumps. Quaternary ... -
Role of Escherichia coli UvrD helicase in resolving G-quadruplex DNA structures
G-quadruplex (G4) secondary structures have been implicated in various biological processes, including gene expression, DNA replication and telomere maintenance. However, unresolved G4 structures impede replication ... -
Kinetic, Catalytic and Epigenetic Properties of HpyAXVII DNA Methyltransferase – a Phasevarion in the Human Pathogen Helicobacter pylori
Helicobacter pylori is the leading cause of gastric cancer in human beings. It is a helix-shaped, Gram-negative, motile bacteria that colonizes the gastric mucosa and eventually the gastric epithelium. It has an overabundance ...