معرفی
Dr. Kristen Johansen is a Professor in the Department of Biochemistry, Biophysics and Molecular Biology at Iowa State University. Her research focuses on the molecular mechanisms underlying nuclear organization and cell cycle regulation, using Drosophila melanogaster as a model system. She investigates how histone modifications, such as H3S10 phosphorylation, regulate chromatin structure and gene expression during mitosis and interphase.
Education: B.A. in Biochemistry from the University of Pennsylvania (1982), Ph.D. in Molecular Biophysics and Biochemistry from Yale University (1989).
Research Interests: Dr. Johansen’s work centers on the dynamic reorganization of nuclear components during the cell cycle. Her lab employs genetic, biochemical, and molecular approaches to study proteins like JIL-1 kinase and Chromator that govern chromatin architecture, spindle matrix formation, and epigenetic regulation. Key areas include the interplay between euchromatin and heterochromatin, histone modification pathways, and the structural basis of position-effect variegation.
Publications highlight her expertise in histone phosphorylation dynamics, spindle matrix protein functions, and the role of chromatin modifiers in mitosis. Her studies contribute to understanding how nuclear organization impacts fundamental cellular processes, such as gene expression and chromosome segregation.
Advising & Grants: While no specific students are listed, her extensive research output suggests active mentorship of graduate students and postdoctoral researchers. Funding likely comes from grants focusing on chromatin biology and developmental genetics.
Labs/Teams: Affiliated with Iowa State’s Molecular Biology facilities, contributing to interdisciplinary projects in epigenetics and cell biology. Collaborates on studies of nuclear architecture and its role in cellular dysfunction.
