Promotor: H.S. Overkleeft, Co-Promotor: B.I. Florea

Peptiden worden routinematig gesynthetiseerd in het bereik van 5-80 aminozuren, in een hoeveelheid van 1-200 µmol (kleinere en grotere hoeveelheden zijn ook mogelijk).

Within this thesis the central stage is taken by the discovery and investigation of transglycosylation of sterols. First, investigation focuses on the development of a method to accurately detect and quantify glucosylated metabolites in biological materials.

This Thesis describes the synthesis of D-alanylated ribitol-based wall teichoic acids from S. aureus to probe their interaction with immune-binding partners.

The research described in this thesis focused on the preparation of S/N functionalized carbene ligands and their transition metal complexes, and the exploration of their application as electrocatalysts for proton reduction.

Promotor: H.S. Overkleeft, J. Neefjes, Co-promotor: M. van der Stelt

Kunnen suikerpatronen op cellen het immuunsysteem activeren om kanker te bestrijden? Sander van Kasteren gebruikt de beurs van de European Research Council (ERC) om te ontdekken of dit mogelijk is.

Kunnen kleine moleculen het immuunsysteem herstellen en helpen tuberculose te bestrijden door autofagie te stimuleren?

LST biedt een uniek onderwijsprogramma dat zich richt op de levende cel. De bacheloropleiding duurt drie jaar. Tijdens je eerste jaar werk je aan een stevig fundament. Daarna is er meer ruimte voor specialisatie.

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.

This thesis presents the first synthetic peptides ADP-ribosylated on serine, threonine, tyrosine, arginine and cysteine.

M.T.M. Koper, Co-promotor: D.G.H. Hetterscheid

The work described in this Thesis is focused on the assembly of oligosaccharide fragments derived from a fungal polysaccharide, galactosaminogalactan (GAG) and fragments of the exopolysaccharide Pel, generated by Pseudomonas aeruginosa.

The studies described in this thesis deal with glycosidases, in particular alpha-galactosidases.

In this thesis, the researcher developed a nanosystem based on the metallophilic Interaction between cyclometalated complexes.

Cyclic peptides are investigated as a platform to induce different orientations between various ligands.

O-Nitrobenzyl groepen worden veel gebruikt als moleculaire beschermgroepen die je met licht kunt verwijderen.

Evolution acts via mutations in amino acid sequences. Substitution of essential amino acids leads to a nonfunctional protein. l.

The aim of this thesis is to study cell-cell interactions and the development of an assay to explore and quantify the exchange of membrane compounds.

This thesis comprises the development of reproducible synthesis procedures for two-dimensional materials (composed of boron, nitrogen and carbon) on different metallic surfaces.

Promotor: E. Bouwman, Co-Promotor: S. Bonnet

Sphingolipids are important membrane compounds with a variety of functions. In mammalian cells, different enzymes are involved in the metabolism of sphingolipids, but interruption of this metabolism process leads to different diseases.

To design the ideal water oxidation catalyst, understanding of the catalytic mechanism and decomposition pathways is essential.

Nicotinamide adenine dinucleotide (NAD+) is the substrate used for the introduction of the ubiquitous and highly dynamic PTM in which either one or multiple adenosine diphosphate ribose (ADPr) moieties are covalently attached to a nucleophilic side chain of an specific amino acid in the target protein…

Promotor: Prof.dr. M. Ubbink, Co-promotor: G. Siegal

Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink

This thesis aimed to investigate core cross-linked polymeric micelles (CCPMs) and expand their potential for the delivery of hydrophobic drugs and co-factors.

On 28 September, the Medieval Murder Maps website will be shared publicly for the first time. The makers have used fourteenth-century coroners' rolls to map the homicides in three medieval towns: London, York, and Oxford. These digital maps are interactive and come with podcasts of interesting cases,…

In 2050 moet de overstap naar nieuwe, duurzame energiebronnen zijn voltooid. Wetenschappers van de Universiteit Leiden verrichten vanuit diverse disciplines uniek onderzoek dat bijdraagt aan deze transitie en de reductie van CO2.

Intelligente apparaten zullen ook ethische beslissingen gaan nemen. Mag een zelfrijdende auto voetgangers overrijden om de inzittenden te redden van een frontale botsing? Mag een onderhandelings-app stress in de stem van de tegenpartij detecteren? En wie bepaalt of dit mag, de gebruiker, de maker of…

De Staff Alliance for Equity (SAFE) is een bottom-upplatform dat openstaat voor medewerkers op alle niveaus, ongeacht hun contractuele status. De aanwezigheid en activiteiten van SAFE versterken onze toewijding aan de Gedragscode van de Faculteit Governance and Global Affairs, die ‘alle studenten en…

Duurzaamheid is een van de centrale aandachtspunten van de Universiteit Leiden en speelt een steeds grotere rol binnen het onderwijs en onderzoek van de Faculteit der Rechtsgeleerdheid. Binnen deze context levert de afdeling Sociaal Recht een belangrijke bijdrage aan het debat en onderzoek rondom Business…

Endocannabinoids are lipid messengers that modulate various physiological functions by activating the cannabinoid CB1 and CB2 receptors. While the metabolism of endocannabinoids and their action at the CB receptors is fairly well studied, the molecular mechanisms governing their release and transport…

This dissertation was to develop effective graphene-based nanofluidic devices by developing scalable fabrication methods and elucidating proton transport mechanisms.

The research described in this thesis combines the latest insights in lysosomal function with lysosome centred cell signalling.

Promotor: G. J. Kroes

This dissertation contains four works during my PhD. Different biomaterials have been designed based on coiled-coil peptides. These biomaterials have a range of applications, inclusing drug delivery, cell sorting to cell-cell fusion.

The primary goal of this research is to deepen our understanding of substrate-enzyme interactions in Glycoside hydrolases. For this purpose, Bacillus circulans xylanase (BcX) has been selected as a well-established model to examine the Michaelis complex and glycosyl-enzyme adduct.

This Thesis describes the design, synthesis and evaluation as glycoprocessing enzyme inhibitors of focused libraries of iminosugars.

The research presented in this thesis explores the chemotherapeutic potential of metal-based compounds as chemotherapy agents, with an initial focus on the synthesis and DNA interaction studies of platinum and palladium compounds utilizing the [Pt(bapbpy)]2+ scaffold. The study identifies intercalation…

Nature uses a special class of histone proteins, histone variants, to modulate the properties of chromatin at defined genomic locations.

The goal of this thesis is to understand how interfacial parameters, such as the addition of organic additives, bulk pH or metal cations of the electrolyte, affect the relevant electrocatalytic reactions, i.e. electrochemical CO2 reduction reaction or hydrogen evolution reaction.

This dissertation focused on computational methods based on first principles calculations using the Density Functional Theory (DFT) framework. Emphasis was laid on affordable methods that can provide a tradeoff between computational expense and accuracy.

Promotors: Prof.dr. E. Bouwman, Prof.dr. E. Drent

Light-Harvesting Complex II (LHCII) is responsible for light absorption and excitation energy transfer in plants and photosynthetic algae, while in high light it undergoes conformational changes by which it quenches excitations to prevent photodamage.

Promotor: H.S. Overkleeft, Co-promotor: M. van der Stelt

This thesis has described novel synthetic methods to produce a variety of (glyco)peptides and their application in the study of various immunological processes.

Promotor: M. Ubbink, Co-promotor: G. Siegal

Carbohydrates are present on the surface of bacteria making them suitable antigen candidates for vaccine development. This thesis deals with the synthesis of two carbohydrate-based components; the capsular polisaccharide of S. aureus type 5 and teichoic acids from staphilococci and enterococci speci…