Promotie: dhr. A. Kale, 13.15 uur, Academiegebouw, Broerstraat 5, Groningen
Proefschrift: Structural investigations of three different proteins by X-ray crystallography and NMR
Promotor(s): prof.dr. B.W. Dijkstra
Faculteit: Wiskunde en Natuurwetenschappen
Contact: Avinash Kale, tel. 0044-114 2634425, e-mail: email@example.com
Structural investigations of three different proteins by X-ray crystallography and NMR
Chapter 1 presents a short review on leucine aminopeptidases. These are zinc-dependent proteases are widespread and occur in all kingdoms of life. Generally, they take care of protein degradation and peptide recycling in the cell. The review discusses the classification of these enzymes and focuses on what we currently know about their three-dimensional (3D) structures and catalytic mechanisms.
The crystal structure determination of ppLAP, a leucine aminopeptidase from Pseudomonas putida, is presented in chapter 2. Three different structures were determined, in a substrate-free, metal-bound state at pH 9.5, in a substrate-free, metal-free state at pH 5.2, and in an inhibitor-bound, metal-bound state at pH 9.
Chapter 3 offers a simplified description of the complex phenomenon of genetic competence development in the Gram-positive bacterium Bacillus subtilis. The review focuses on adapter switch, MecA, and on what is currently known about its interactions with ComK, ComS, and ClpC.
Our efforts to determine a detailed structure of MecA are presented in chapter 4. The failure in obtaining crystals has compelled us try and solve its 3D structure by using NMR. The NMR data did not allow a full 3D structure determination. Explanations are proposed for this recalcitrant behaviour of MecA.
Finally, chapter 5 describes the structural and functional studies of SWAP-70, a 70-kDa protein from mouse, which represents a novel Rac-dependent guanine exchange factor (GEF). Various crystallization trials using different constructs of full length SWAP-70, SWAP-70 fragments, and complex with Rac protein were set up, albeit without success. Suggestions are offered to move this project forward.
Prof. Moniek Tromp has been appointed Captain of Science of the Chemistry Top Sector by the Minister of Economic Affairs and Climate Policy. As from 1 July 2023, she succeeded Prof. Bert Weckhuysen from Utrecht University.
Leonardo Arriagada Beltran conducted his PhD research on the interface of computer-generated art and the constantly evolving field of Artificial Intelligence (AI). He will defend his Phd thesis on 21 September. His research offers valuable insights...
Harish Vedantham and Casper van der Kooi have been nominated by New Scientist for Wetenschapstalent 2023 (Science Talent 2023). This election is meant to give young scientists and their research a stage.
The UG website uses functional and anonymous analytics cookies. Please answer the question of whether you want to accept
or reject other cookies (such as tracking cookies).
If no choice is made, only basic cookies will be stored. More information