Staying mobile
Lamins are proteins that provide structural support to the cell nucleus by forming a fibrous mesh beneath the nuclear membrane called the nuclear lamina. In addition to providing structural support, soluble lamins and lamin-associated proteins (LAPs), play a crucial role in organizing chromatin and regulating gene expression. The molecular mechanisms that underlie these processes, however, remain unclear. In a recent Nucleic Acids Research publication, the Foisner lab revealed that LAP2α drives muscle cell differentiation by controlling the distribution of lamins A and C on chromatin.
Arndt von Haeseler retires at the Max Perutz Labs
Throughout his career, Arndt von Haeseler studied two fundamental questions in evolutionary biology: What are the evolutionary forces that have shaped the genomes of contemporary organisms, and how can we infer the relevant parameters from multiple sequence alignments? He has focused on developing mathematical, statistical, and computational tools to analyze the vast amounts of data generated by high-throughput technologies.
“Humans evolved to be storytellers”
Erinc Hallacli, originally from Türkiye, obtained his PhD at the European Molecular Biology Laboratory (EMBL) in Heidelberg, Germany. For his postdoctoral studies, he moved to the Whitehead Institute for Biomedical Research in Cambridge, USA to work on protein aggregation sensors and RNA binding prions. Erinc shifted his focus to investigate Parkinson’s Disease when he relocated to Brigham and Women’s Hospital in Boston, USA, where he also was appointed Assistant Professor in Neurology in 2023. Now based in Vienna, Erinc is a junior group leader at the Perutz and Assistant Professor at the Medical University of Vienna. In our interview, he shares insights into his research and passion for science.
Who let the FoxO in?
Pluripotent embryonic stem cells eventually give rise to the development of a healthy organism, complete with more than 300 fully differentiated cell types. The mechanisms by which they undergo differentiation, however, are not fully understood. In a new study published in Nature Communications, first author Laura Santini, a former PhD student in the Leeb lab, investigated how naïve pluripotent stem cells execute the first cell fate decision of the early post-implantation embryo. The researchers discovered a crucial role of FoxO transcription factors in ensuring the orderly and timely shift from the naïve to the formative state during embryonic stem cell development.
Alwin Köhler reappointed as scientific director of the Max Perutz Labs
Alwin Köhler has been appointed as scientific director of the Max Perutz Labs for an additional four-year term. Since starting in 2020, he has successfully led the institute through a period of significant transformation. His second four-year term will begin on October 1, 2024.
Disordered by design
During periods of protein folding stress, the transmembrane protein IRE1 detects misfolded proteins in the endoplasmic reticulum (ER) and initiates a transcriptional relay as part of the unfolded protein response (UPR). In order to signal the presence of unfolded proteins in the ER, IRE1 oligomerizes, but the molecular mechanisms behind this process remain unknown. In a recent study from the Karagöz lab published in EMBO Journal, first authors Paulina Kettel, PhD student and Max Perutz Fellowship awardee 2022, and Laura Marosits, then research associate, provide the first evidence that disordered regions in IRE1’s ER luminal sensor domain regulate its self-assembly. Their discoveries could help pave the way for the development of drugs that target diseases associated with protein misfolding.
DOC fellowships for Perutz PhD students
The DOC Fellowship program of the Austrian Academy of Sciences (ÖAW) is designed to support highly qualified PhD students by providing funding for their scientific projects. Congratulations to this year’s Max Perutz Labs awardees, Milica Mihailovic and Raquel Silva. Milica investigates ubiquitin-like modifiers as post-translational modifications and their importance for protein quality control. Raquel's work focuses on endothelial cells and their mechanical stress response during the development of cardiovascular diseases.
Man is but a worm (with some small differences)
Gene silencing via RNA interference (RNAi) pathways, a defense mechanism against transposable elements, is evolutionarily conserved and mediated by small RNAs (sRNAs). The exoribonuclease MUT-7 plays a key role in generating the sRNAs. In a recent study published in Nucleic Acids Research, first author Virginia Busetto, a post-doctoral researcher in the lab of Sebastian Falk, characterized MUT-7, revealing that its C-terminal domain exhibits species-specific variations that may serve unique functions.
Vallee Scholarship for Perutz group leader Irma Querques
Congratulations to Irma Querques on being named a 2024 Vallee Scholar. The Vallee Foundation recognizes outstanding, young, independent investigators and supports career development in basic biomedical research. Over the next four years, the foundation will provide funding of $340,000 to support Irma's study on how transposons, also known as ‘jumping genes’, operate, and on exploring their potential technological applications.
Nuclear pore basket - octopus-like arms unveiled
The nuclear pore basket is a filamentous structure attached to the nucleoplasmic side of the nuclear pore complex (NPC), crucial for regulating transport between the nucleus and cytoplasm. In a paper published in Nature Cell Biology, Edvinas Stankunas and Alwin Köhler revealed the structural basis of the basket filaments and their docking mechanism to the main body of the NPC. They explain how the basket can dynamically change its shape, much like the arms of an octopus, to accommodate transport needs, offering new insights into its flexibility and functional plasticity.
A collaborative ORFventure
A Vienna BioCenter campus-wide collaboration involving Perutz group leader Stefan Ameres, Julius Brennecke and Ulrich Elling from the Institute of Molecular Biotechnology (IMBA), and Alexander Stark from the Research Institute of Molecular Pathology (IMP), has developed a method called ‘ORFtag’ to systematically tag proteins and investigate their function in mammalian cells. The innovative, time- and resource-efficient technique enables genome-wide screens of protein functionality. The study is published in Nature Methods.
Two negatives make a positive
Antagonists that are themselves antagonized play a common regulatory role in molecular biology. Peter Schlögelhofer, along with first author Ignacio Prusén Mota and their team, has now identified that the WAPL antagonist SORORIN is not confined to vertebrates but evolutionarily conserved, also to be found in Arabidopsis thaliana and Schizosaccharomyces pombe. Furthermore, they obtained the first in vivo evidence that SORORIN antagonizes WAPL, which is in turn a cohesin antagonist. The study, published in Nature Communications in collaboration with the lab of Jan Michael Peters (Institute of Molecular Pathology), provides valuable insights into the molecular regulation of chromosome segregation in mitotic and meiotic cells.
office@maxperutzlabs.ac.at
+43 1 4277 240 01
Vienna BioCenter Dr.-Bohr-Gasse 9, 1030 Vienna
This website uses cookies to ensure you get the best experience on our website.
» Privacy Policy