291 zoekresultaten voor “protein” in de Publieke website
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Analysis of sub-visible particles in complex injectable formulations
Promotors: W. Jiskoot; G.J. Witkamp, Co-promotor: M.R. Nejadnik
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Exploring chemical space in covalent and competitive glycosidase inhibitor design
Glycoside hydrolases (glycosidases/GHs) are widely abundant enzymes in all kingdoms of life and are important biocatalysts that catalyze the hydrolysis of glycosidic linkages in oligo/polysaccharides, glycoproteins and glycolipids with tremendous efficiency
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Single-molecule microscopy in zebrafish embryos
Single-Molecule Microscopy (SMM) techniques constitute a group of powerful imaging tools that enable researchers to study the dynamic behavior of individual molecules.
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Novel analytical approaches to characterize particles in biopharmaceuticals
Particles are omnipresent in biopharmaceutical products. In protein-based therapeutics such particles are generally associated with impurities, either derived from the drug product itself (e.g. protein aggregates), or from extrinsic contaminations (e.g. cellulose fibers).
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Affinity-based profiling of the adenosine receptors
The adenosine receptors are proteins that reside in the extracellular membranes of cells. Activation of adenosine receptors plays a role in many physiological and pathological processes, such as immune responses and cancers.
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The good? The bad? The mutant! Characterization of cancer-related somatic mutations and identification of a selectivity hotspot in adenosine
G protein-coupled receptors (GPCRs), one of the largest families of membrane proteins, are responsive to a diverse set of physiological endogenous ligands including hormones and neurotransmitters.
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A study on PsbS and its role as a pH sensor
Solar energy harnessed by plants and algae has great potential to be converted into biofuels for future generations.
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The relation between dynamics and activity of phospholipase A/acyltransferase homologs
Phospholipase A/acyltransferase 3 (PLAAT3) and PLAAT4 are enzymes involved in the synthesis of bioactive lipids. Despite sequential and structural similarities, the two enzymes differ in activity and specificity.
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A chemical biology approach for targeting of ligand-drug conjugates
Promotores: H.S. Overkleeft, G.A. van der Marel, Co-Promotor: R.G. Boot
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Chemical tools to monitor and control proteasome activities
Promotores: H.S. Overkleeft; G.A. van der Marel Co-Promotor: B.I. Florea
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Design and development of conformational inhibitors and activity-based probes for retaining glycosidases
Glycosidases are essential in fundamental biological processes and are responsible for the degradation of most (oligo)saccharides, glycolipids and glycoproteins.
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Activity-Based Proteasome Profiling
Promotor: Prof.dr. H.S. Overkleeft
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Natural and non-natural factors influencing Alzheimer´s Aβ
Promotor: Prof.dr. J.P. Abrahams
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Trans-kingdom DNA transfer
The type-IV secretion system (T4SS) is a machinery able to transfer DNA and proteins between bacteria and in certain cases also to eukaryotic cells.
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The ins and outs of ligand binding to CCR2
Promotor: Prof.dr. A. P. IJzerman, Co-Promotor: L.H. Heitman
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Enumeration and Simulation of Lattice Polymers as Models for Compact Biological Macromolecules
Promotores: H. Schiessel, G.T. Barkema
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Chemical Tools to Illuminate N-acylphosphatidylethanolamine Biosynthesis
This thesis describes the development and optimization of the first molecular tools to study the enzyme PLA2G4E.
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Clavis Aurea? Structure-enabled approaches of identifying and optimizing GPCR ligands
Promotores: A.P. IJzerman, H.W.T. van Vlijmen
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Sensing Transport
Solute carrier (SLC) transporters are a large and diverse class of relatively understudied transmembrane proteins.
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Algorithms for the description of molecular sequences
Promotor: J.N. Kok, P.E. Slagboom Co-promotor: J.F.J. Laros
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Inhibitors and probes targeting endo-glycosidases
The chemical synthesis of inhibitors and probes targeting endo-glycosidases.
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The role of autophagy during carbon starvation in Aspergillus niger
Autopaghy is an intracellular degradation system which targets cytosolic components to lytic compartments for degradation and recycling of the building blocks of the cell.
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Dynamics of a β-lactamase
BlaC is the β-lactamase of Mycobacterium tuberculosis. We show that it can recover from inhibition by clavulanic acid and that phosphate helps it do so.
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Activity-based proteomics of the endocannabinoid system
This thesis describes the use of an activity-based proteomics method to study the endocannabinoid system.
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Putting a spin on it: amyloid aggregation from oligomers to fibrils
This thesis focuses on amyloid proteins, a class of proteins that convert into amyloid fibrils.
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Photosynthetic light reactions at the gold interface
Promotor: T.J. Aartsma, Co-promotor: R.N. Frese
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Biodiesel production using blue-green cyanobacterium Synechococcus elongatus PCC 7942
Promotores: Prof.dr. C.A.M.J.J. van den Hondel, Prof.dr. V. Meyer (Technische Universität Berlin)
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Leidse wetenschappers ontwikkelen topologische barcode voor gevouwen moleculen
Het team van Alireza Mashaghi van het Leiden Academic Centre for Drug Research heeft een manier gevonden om de vorm van eiwitten te bepalen en classificeren: door middel van een barcode. Met de simpele maar precieze topologische barcode is het mogelijk alle soorten vouwen in een eiwit weer te geven.…
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In vitro investigation of the photoprotection mechanism of Light Harvesting Complex II
Solar energy is used by photosynthetic organisms to drive energy required cellular processes. Is absorbed by two groups of pigments, located in the LHCs.
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Regulation of the arabidopsis AGC kinase PINOID by PDK1 and the microtubule cytoskeleton
Plants, are sessile organisms, have developed strategies to adapt to changes in their environment, in part by altering their growth and development.
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Chemical tools to study lipid signaling
Synthesis and application of chemical biology tools to study immunomodulatory signaling lipids.
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Substrate adaptability of β-lactamase
The research aims to explore the evolutionary adaptability of enzymes and the impact of temperature on protein evolution pathways, using M. tuberculosis β-lactamase BlaC as the object of study. Enzymes inherently embody a delicate balance between activity and stability, and the acquisition of new enzymatic…
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Visualization of Vitamin A Metabolism
Vitamin A or retinol is essential in embryonic development, the visual cycle and the immune system.
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Development of kinase inhibitors and activity-based probes
Promotor: H.S. Overkleeft, J. Neefjes, Co-promotor: M. van der Stelt
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How Electrostatic Interactions Drive Nucleosome Binding of RNF168 & PSIP1
The studies presented in the work show the potential of the integrative use of biophysical data in defining the structural basis of protein interactions.
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Interactions from lipid membrane deformations
Biological cells, the basic building blocks of all life forms, are surrounded by a lipid membrane. More than half of the membrane is occupied by membrane proteins, which can regulate the cell functionality through specific arrangements.
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Multi-omics studies of the control of growth and antibiotic production of Streptomyces
Actinobacteria are Gram-positive bacteria that have a complex multicellular life cycle and are well known for their ability to produce a wide range of bioactive natural products (NPs).
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Mechanism-based inhibitors and probes for neuraminidases
Neuraminidases are enzymes that cleave glycosidic linkages of sialic acid. These enzymes are involved in influenza infections as well as in many cellular processes in mammals and micro-organisms.
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The road to insurmountability: Novel avenues to better target CC Chemokine receptors
This thesis explores different avenues to develop insurmountable antagonists for CC Chemokine Receptors, such as CCR1, CCR2 and CCR5.
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Noonan and LEOPARD syndrome in zebrafish: molecular mechanisms and cardiac development
Promotor: Prof.dr. J. den Hertog
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Cellular Forces: Adhering, Shaping, Sensing and Dividing
Promotor: Prof.dr. T. Schmidt
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Mechanical and genetics basis of cellularization and serosal window closure in Tribolium castaneum
The applications of studying the early development of insects range from agriculture to material science.
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The flux and flow of data: connecting large datasets with machine learning in a drug discovery envirionment
This thesis focuses on data found in the field of computational drug discovery. New insight can be obtained by applying machine learning in various ways and in a variety of domains. Two studies delved into the application of proteochemometrics (PCM), a machine learning technique that can be used to…
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Inhibitor Selectivity: Profiling and Prediction
Less than 1 in 10 drug candidates that enter phase 1 clinical trials actually gets approved for human use.
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Mechano-transduction mediated by integrin-based adhesion complexes: integration of cytoskeleton and adhesion dynamics
In this thesis, we focus on novel proteins/mechanisms that regulate integrin-adhesion mediated mechano-transduction.
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Cryo Electron Tomography Studies On Bacterial Chemosensory Arrays
Bacterial chemosensory arrays are protein assemblies that are the key structural and functional component for motile bacteria to sense their internal or environmental chemical signals.
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Bioorthogonal Antigens as Tool for Investigation of Antigen Processing and Presentation
In order to be able to develop effective medicine and treatments to prevent or cure autoimmune diseases or cancer we need to understand the mechanisms how they arise and what drives their course.Unravelling the fundamental molecular mechanisms influencing the onset and course of diseases such as allergies,…
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Novel detectors and algorithms for electron nano-crystallography
Promotor: Prof.dr. J.P. Abrahams, Prof.dr. M. van Heel
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Lipid mediated colloidal interactions
The lipid membrane is a basic structural component of all living cells. Embedded in this nanometer-thin barrier, membrane proteins shape the membrane and at the same time respond to the shape of the membrane.
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Coiled-coils on lipid membranes: a new perspective on membrane fusion
Promotor: J.G.E.M. Fraaije, Co-Promotor: A. Kros