Karolin Luger

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Karolin Luger
Karolin Luger, Ph.D.jpg
Residence United States
Citizenship Austria
Fields biochemistry, biophysics
Institutions Swiss Federal Institute of Technology, Colorado State University
Alma mater University of Basel
Known for Discovering the three-dimensional structure of chromatin
Notable awards Searle Scholar Award
Website
www.lugerlab.org

Karolin Luger is an Austrian-American biochemist and biophysicist known for her work with nucleosomes and discovery of the three-dimensional structure of chromatin. She is a University Distinguished Professor at Colorado State University in Fort Collins and works with the University of Colorado School of Medicine's Department of Biochemistry and Molecular Genetics.

3D nucleosome structure, histone proteins in center, DNA around outside

Life[edit]

Luger was born the youngest child after several brothers. Though not interested in mathematics, electronics, or physics, as her brothers were, she became fascinated with biology. She has stated that she chose a career in science during middle school, when she realized that "not everything was 'known' yet".[1] As a young woman in Austria, Luger attended a gymnasium where she specialized in foreign languages.[1]

Luger is married and has one daughter.[1]

Education[edit]

Luger earned a Bachelor of Science in microbiology and a Master of Science in biochemistry from the University of Innsbruck.[2] She completed her Ph.D in biochemistry and biophysics at the University of Basel.[2][3]

Career[edit]

In 1997, as a postdoc with Timothy Richmond, Luger was first author on the paper that described the first structure determined for the nucleosome. The structure was discovered by X-ray crystallography.[2][4] She also proposed that histone-DNA bonds are weaker at points where less of the histone contacts the DNA, which was confirmed by Michelle Wang in a 2009 paper.[5] After several years at the Swiss Federal Institute of Technology, Luger was hired by Colorado State University in 1999.[6][7] Her work there includes extensive further research on the nucleosome's three-dimensional structure.[6] The nucleosome, a building block of the chromatin genetic material that makes up chromosomes, consists of DNA wrapped around a disk of proteins. In 2005, Luger and Kenneth Kaye used X-ray crystallography to determine the mechanism that the virus causing Kaposi's sarcoma, a cancer that affects subdermal connective tissue, uses to spread. The virus attaches to chromatin and inserts its genetic material, which is then copied along with the cell's DNA. Luger and Kaye thus showed that a virus can attach to chromatin as a "docking platform".[8]

Since 2010, Luger has done significant studies of histones, researching the connection between their chaperone proteins and acetylation, as well as variant structures.[7][9] Histones are important in the process of gene expression, and their positioning as determined by chaperone proteins is essential to that role. The chaperones also can change the conformation of the nucleosome as a whole.[2] Modifications to histones, including acetylation, methylation, and phosphorylation, are important because of their role in activating and deactivating genes.[5] In 2008, Luger published a study that showed that physical changes to the nucleosome do not occur when DNA is methylated.[10] Luger's research as of 2012 also comprises several other areas of study with chromatin, including the processes of DNA replication, transcription, recombination, and repair in chromatin.[9] She and her research group have also developed various assays for examining chromatin structure, to augment traditional X-ray crystallography.[9] Another related research interest for Luger's research group is the genetic cause of Rett syndrome, the gene MECP2. The gene codes for a protein that binds to methyl groups on chromatin, altering its conformation.[5]

Honors[edit]

Luger has received many honors throughout her career. While in Austria, she received the State of Vorarlberg's State Science Prize.[2] She was the recipient of the Searle Scholar Award in 1999, her first year as a professor at Colorado State University. In 2003, she was named a Monfort Professor and awarded $75,000 a year for two years in research funds by the university.[6] Two years later, Luger was appointed as an investigator at the Howard Hughes Medical Institute.[2][7] From 2008 to 2012, Luger sat on the National Institute of General Medical Sciences' advisory board.[11]

She has also received several prestigious grants throughout her career, including a 5-year award from the National Institute of Health and a $1.2 million grant from the W. M. Keck Foundation.[6]

In 2012, Luger was chosen to be the National Lecturer for the Biophysical Society's 2013 meeting.[11]

References[edit]

  1. ^ a b c "Biophysicist in Profile: Karolin Luger". Biophysical Society Newsletter. December 2012. Retrieved 10 January 2013. 
  2. ^ a b c d e f "Karolin Luger, Ph.D.". HHMI Investigators. Howard Hughes Medical Institute. Retrieved 26 December 2012. 
  3. ^ "Colorado State University Biomedical Scientist Named Howard Hughes Medical Institute Investigator". Colorado State University. 21 March 2005. Retrieved 25 December 2012. 
  4. ^ Luger K, Mader AW, Richmond RK, Sargent DF, Richmond TJ (1997). "Crystal structure of the nucleosome core particle at 2.8 A resolution". Nature 389: 251–260. doi:10.1038/38444. PMID 9305837. 
  5. ^ a b c Mascarelli, Amanda Leigh (May 2009). "Cellular Neatniks". HHMI Bulletin (Howard Hughes Medical Institute) 22 (2). Retrieved 26 December 2012. 
  6. ^ a b c d "Colorado State University Announces World-Leading Researchers as Two Newest Monfort Professors". Colorado State University. 29 April 2004. Retrieved 24 December 2012. 
  7. ^ a b c "About Us - History". Luger Chromatin Structure & Dynamics Research Laboratory. 20 February 2011. Retrieved 25 December 2012. 
  8. ^ Pines, Maya (December 2005). "Viewing Vital Structures". HHMI Bulletin (Howard Hughes Medical Institute) 18 (3). Retrieved 26 December 2012. 
  9. ^ a b c "Research - Introduction". Luger Chromatin Structure & Dynamics Research Laboratory. 20 February 2011. Retrieved 25 December 2012. 
  10. ^ "Seeing the Shape of Gene Silencing". Howard Hughes Medical Institute - Research News. 14 September 2008. Retrieved 10 January 2013. 
  11. ^ a b Wilmsen, Emily Narvaes (14 December 2012). "Colorado State University's Karolin Luger Selected As Biophysical Society National Lecturer". Colorado State University (subscription required). Retrieved 10 January 2013.