Genomic exploration of Microbial Dark Matter in Antarctic Permafrost
Abstract
Microorganisms, constituting the most abundant and diverse life forms on Earth, play pivotal roles in the biogeochemical cycles shaping our planet s ecosystems. However, a significant portion of these microbes and their genomes remains enigmatic due to the challenges associated with cultivation. Termed as microbial dark matter (MDM), this hidden microbial diversity holds profound implications for understanding life s origins, evolution, and harnessing its genomic resources for scientific exploration. The unknown aspects of MDM present a formidable challenge in biology, with many prokaryotes remaining concealed within the tree of life. The depletion of well-studied, easily cultivable microorganisms over time underscores the urgency of exploring the untapped potential within MDM. Analysis reveals that MDM microorganisms likely harbor undiscovered metabolic pathways, gene clusters for biosynthesis, and novel enzymes, often encoded within highly divergent gene families. This proposed project aims to explore MDM within Antarctic permafrost using a genome-resolved metagenomics approach. By focusing on Antarctic permafrost, known for its extreme conditions and unique microbial communities, the study seeks to discover novel representatives of MDM and characterize their coding sequence space, particularly focusing on genomic dark matter. The central hypothesis posits that the Antarctic permafrost harbors both known and novel representatives of uncultured archaeal and bacterial phyla with uncharacterized genomic content, holding potential for biotechnological applications. The primary objective is to reconstruct complete or near-complete genomes of known and novel archaeal and bacterial taxa from Antarctic permafrost metagenomes. Through this, the study aims to access functional genomic information that could lead to the discovery of potentially novel biomolecules of biotechnological interest. By elucidating the mysteries of MDM in one of Earth s most extreme environments, this research promises to advance our understanding of microbial diversity, uncover novel biological activities, and inspire innovative biotechnological applications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 06, 2025
- Source ID
- FA95502410245
Entities
People
- Jenny M Blamey
Organizations
- Air Force Office of Scientific Research
- United States Air Force