Daniel J Lessner

Daniel J Lessner is a Professor and Departmental Vice Chair in the Department of Biological Sciences within the College of Arts and Sciences at the University of Arkansas. His research program focuses on the physiology, biochemistry, and genetics of strictly anaerobic methane-producing archaea (methanogens), with particular emphasis on oxidative stress response mechanisms.

His educational background includes:

• Ph.D. in Microbiology from the University of Iowa (2003)
• B.S. from the University of Wisconsin-Stevens Point (1996)

Dr. Lessner's research investigates how methanogens sense and respond to environmental stressors, especially oxygen and reactive oxygen species. Using Methanosarcina acetivorans as a model organism due to its metabolic diversity and robust genetic system, his laboratory examines proteins containing regulatory iron-sulfur clusters that modulate structure and activity in response to oxidative conditions. This work is critical for understanding anaerobe survival in changing environments and has implications for modulating biological methane production—a key component of the global carbon cycle, potent greenhouse gas, and valuable biofuel. His third project focuses on engineering methanogen strains with enhanced substrate utilization and oxygen tolerance.

Analysis of his 2010-2016 publications reveals a dominant focus on iron-sulfur cluster function in oxidative stress response, particularly in thioredoxin systems and RNA polymerase subunits. Key themes include redox-sensitive transcriptional regulation (e.g., MsvR), enzymatic mechanisms of hydrogen peroxide resistance, and genetic engineering of methanogens. These studies collectively advance understanding of archaeal stress adaptation and biotechnological applications for methane production optimization.

Scientific Awards: No specific awards are documented in the available information.

Advising and Grants: Dr. Lessner teaches undergraduate and graduate courses including BIOL3123: Prokaryote Biology and BIOL4003/5003: Laboratory in Prokaryote Biology, covering Microbiology, Molecular Biology, Microbial Genetics, and Microbial Physiology. While explicit grant details are not provided, his active research program on methanogen physiology and strain engineering indicates ongoing funding support. He mentors students through laboratory instruction and research supervision in microbial genetics and biochemistry.

Labs and Teams: Dr. Lessner leads a research laboratory within the Department of Biological Sciences at the University of Arkansas, where his team employs genetic, biochemical, and physiological approaches to study methanogen stress responses and develop engineered strains for improved methane production capabilities.