Browsing Division of Biological Sciences by Advisor "Sarma, Siddhartha P"
Now showing items 1-15 of 15
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Conformational Heterogeneity, Solution Structure and Autoregulatory Roles of the MazE9 Antitoxin from Mycobacterium tuberculosis
The work presented in this thesis endeavors to decode the details of the dynamics of MazE9 antitoxin of the Mycobacterium tuberculosis MazEF9 toxin-antitoxin system and the transcriptional autoregulation effected by it. ... -
Crystallographic and analytical ultracentrifugation studies of the E. coli acetohydroxy acid synthase I enzyme
This thesis ellucidates the mechanism of activation and regulation of AHAS I enzyme from Escherichia coli that was characterised using crystallographic and sedimentation velocity analytical ultracentrifugation studies. AHAS ... -
Deciphering Structure-Function Relationships in a Two-Subunit-Type GMP Synthetase by Solution NMR Spectroscopy
(2018-04-24)The guanosine monophosphate synthetase (GMPS) is a class I glutamine amidotransferase, involved in the de-novo purine nucleotide biosynthesis. The enzyme catalyzes the biochemical transformation of xantosine (XMP) into ... -
NMR Solution Structures of Human γC-Crystallin & the Intrinsically Disordered Viral Genome Linked Protein in the Free & Bound Form
(2018-02-14)This thesis describes the tertiary structures and dynamic studies of two protein systems. The first is human γC -crystallin protein, which is present in the nucleus of the human eye lens and the other is the plant viral ... -
Protein folding and Disulphide rich peptide(s) folds
Protein folding and protein folds are two sides of a coin. The study of protein folding processes is crucial for advancing our knowledge in fundamental cellular processes while the study of protein folds is important for ... -
Protein NMR Studies of E. Coli IlvN and the Protease-VPg Polyprotein from Sesbania Mosaic Virus
(2018-04-03)Acetohydroxyacid synthase is a multisubunit enzyme that catalyses the first committed step in the biosynthesis of the branched chain amino acids viz., valine, leucine and isoleucine. In order to understand the structural ... -
Solution NMR studies of a potent subtilisin inhibitor from Budgett’s frog and the catalytic subunit of AHAS
This thesis involves a detailed structural study of two molecular systems, a small disulfide-rich peptide LL-TIL and a large catalytic subunit of AHAS. Subtilisin inhibitors play an important role in fighting against ... -
Solution NMR Studies Of E.Coli Acetohydroxy Acid Synthase (AHAS) I
(2010-04-13)Branched chain amino acids are classified as essential amino acids since their biosynthetic routes or pathways are restricted only to micro-organisms, fungi and plants. Given their unique distribution, the enzymes of the ... -
Solution NMR Studies Of Peptide Toxins From Cone Snails And Scorpion
(2010-09-13)Major constituents of the venom of various animals are peptidogenic in nature. Marine snails belonging to the species Conus are venomous predators that use small, structurally constrained peptides present in their venom ... -
Solution Structural Studies And Substrate Binding Properties Of The Amino-Terminal Domain Of E.coli Pantothenate Synthetase
(2011-03-29)Pantothenate synthetase (PS), which catalyzes the last step in the pantothenate (vitamin B5) biosynthesis, is a dimeric enzyme present in bacteria, fungi and plants. The enzymatic properties of PS from Escherichia Coli, ... -
Solution Structure Studies on the Effects of Aromatic Interactions and Cross-Strand Disulfide Bonds on Protein Folding
(2018-07-05)The work presented in this thesis focusses primarily on the determination of protein structure at atomic resolution, with NMR spectroscopy as the principle investigative tool. The thesis is divided into four parts. Part I ... -
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, ... -
Solution Structures and Dynamics of Conotoxins and Small MutS Related Domain from Helicobacter Pylori MutS2
(2018-06-08)The work presented in this thesis describes the determination of structures of peptides and proteins at atomic resolution. Nuclear Magnetic Resonance (NMR) spectroscopy was used as the principal method of investigation. ... -
Solution structures and interaction studies of mycobacterial MazEF6 toxin-antitoxin system
Toxin-Antitoxin (TA) systems are stress response systems found on plasmids and chromosomes of bacteria and archaea. They are involved in important functions such as plasmid maintenance, programmed cell death, persister ... -
Structural Studies Of E. Coli Thioredoxin And P. Falciparum Triosephosphate Isomerase By NMR And Computational Methods
(2014-05-21)To unravel the mysteries of complex biological processes carried out by biomolecules it is necessary to adopt a multifaceted approach, which involves employing a wide variety of tools both computational and experimental. ...