PhD ceremony: Mr. A.F. Ellen, 16.15 uur, Aula Academiegebouw, Broerstraat 5, Groningen
Dissertation: The extracellular proteome of Sulfolobus
Promotor(s): prof. A.J.M. Driessen
Faculty: Mathematics and Natural Sciences
Microorganisms secrete proteins in their environment that fulfill numerous functions. I made an inventory of the extracellular proteins in a group of microorganisms, called Sulfolobus, which live at 80°C and under acidic conditions. As it turns out Sulfolobus secretes relatively little protein into their environment. However, I discovered that vesicles that are released into their surrounding by Sulfolobus are associated with so-called ESCRT proteins. In higher organisms the ESCRT proteins are involved in cell division but they also play a role in creating vesicles in a cellular organel that is called the endosome. My research suggests that the roles of the ESCRT proteins are similar in Sulfolobus and higher organisms. I also discovered that two Sulfolbus species produce antimicrobial compounds that in the case of the species Sulfolobus tokodaii are associated with the extracellular vesicles. The identity of the antimicrobial compounds was previously not known in Sulfolobus but I discover the two proteins that are responsible for the antimicrobial activity. Both proteins are required for antimicrobial activity and they seem to represent a completely new group of antimicrobial proteins. Which of those two proteins is the actual antimicrobial protein remains to be discovered.
Older people with memory problems who live at home are extraordinarily resourceful when it comes to staying in control of their activities outside the home. Demographers Jodi Sturge and Mirjam Klaassens are certainly impressed. ‘It’s not about...
Scientists at SRON, VU and RUG have now developed a model that predicts whether there is a carbon cycle present on exoplanets, provided the mass, core size and amount of CO2 are known.
On 26 April, Amina Helmi (Bahia Blanca, Argentina, 1970) was appointed Knight in the Order of the Dutch Lion. She is Professor of Dynamics, Structure and Formation of the Milky Way at the Kapteyn Astronomical Institute, which is part of the Faculty...
The UG website uses functional and anonymous analytics cookies. Please answer the question of whether or not you want to accept other cookies (such as tracking cookies).
If no choice is made, only basic cookies will be stored. More information