Content with the tag: “enzymes”
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Hydrogenase Active Sites and the Origin of Life
Members of NAI’s Team at Montana State University have provided a Perspectives piece in Dalton Transactions reviewing the organo-metallic chemistry of the active sites of hydrogenase enzymes. Since hydrogen metabolism is presumed to be an early feature in the energetics of life, and hydrogen metabolizing organisms can be traced very early in molecular phylogeny, studying the metal clusters at hydrogenase active sites can reveal potential conditions in which early life arose. Efforts in this field also could have significant impacts on alternative and renewable energy solutions.
April 6, 2009 / Posted by: Daniella Scalice
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New Enzymes in the Laboratory
A new paper in Nature this week from NAI’s NASA Ames Research Center Team describes a new technique they’ve developed through which completely new enzymes can be evolved in the laboratory. The process does not require prior understanding of how the enzymes will work, but uses product formation as the sole selection criterion.
Source: [Link]
August 17, 2007 / Posted by: Shige Abe
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Potential Origin of Primordial Protein Enzymes
Life on earth is facilitated by a multitude of enzymes that catalyze essential chemical reactions. The vast majority of today’s enzymes are proteins, yet looking at the complex and intricate structures of natural enzymes it is hard to imagine how the first enzymes emerged.
However, new experiments by Seelig and Szostak, show that small, simple enzymes can evolve rather easily. In the August 16, 2007 issue of Nature, they describe the generation of an artificial enzyme by simulating evolution in a test tube. The researchers at first produced a random library of 4 trillion...
August 16, 2007 / Written by: Andrzej Pohorille
A search for primordial water from deep in the Earth's mantle
ROADMAP OBJECTIVES: 1, 4
A Self-Perpetuating Catalyst for the Production of Organics in Protostellar Nebulae
ROADMAP OBJECTIVES: 1, 3
Acquisition and Installation of a new Cameca ims 1280 ion microprobe
ROADMAP OBJECTIVES:
Advancing Techniques for in situ Analysis of Complex Organics
ROADMAP OBJECTIVES: 2, 2, 3, 3, 7
Application of U-tube and fiber-optic distributed temperature sensor to characterize the chemical and physical properties of a deep permafrost and sub-permafrost environment at High Lake, Nunavut, Canada.
ROADMAP OBJECTIVES: 2, 5, 5, 7
Astrobiology Sample Analysis Program (ASAP)
ROADMAP OBJECTIVES:
Biological potential of Mars
ROADMAP OBJECTIVES: 2, 3
Biosignatures in chemosynthetic and photosynthetic systems
ROADMAP OBJECTIVES: 2, 4, 5, 5, 6, 7, 7
Breakdown of methane due to electric discharge: A Laboratory Investigation with Relevance to Mars
ROADMAP OBJECTIVES: 2
Chemical Models of Nebular Processes
ROADMAP OBJECTIVES: 1
Composition of Parent Volatiles in Comets: Oxidized Carbon
ROADMAP OBJECTIVES:
Current Status and Future Bioastronomy with the Large Millimeter Telescope
ROADMAP OBJECTIVES: 3
Early Metabolic Pathways
ROADMAP OBJECTIVES: 2, 3
Early Metabolic Pathways
ROADMAP OBJECTIVES: 3, 3
Fingerprinting Late Additions to the Earth and Moon via the Study of Highly Siderophile Elements in Lunar Impact Melt Rocks
ROADMAP OBJECTIVES: 1
Formation and Detection of Hot-Earth Objects in Systems with Close-in Jupiters
ROADMAP OBJECTIVES: 1, 1
Formation of Planetesimals in a Dynamically Evolving Nebula
ROADMAP OBJECTIVES: 1
Genes that regulate photosymbiotic relationships
ROADMAP OBJECTIVES: 2
Habitable Planets
ROADMAP OBJECTIVES: 1, 1, 2, 4
Icelandic subglacial lakes
ROADMAP OBJECTIVES: 2, 4, 5, 6
Interplanetary Pioneers
ROADMAP OBJECTIVES: 5, 6
Microbial Communities and Activities in the Deep Marine Subsurface
ROADMAP OBJECTIVES: 5, 5, 6, 6
Modeling grain surface reaction pathways for large organic molecules
ROADMAP OBJECTIVES: 3
Organic and Inorganic Acids from Ion-irradiated Ices
ROADMAP OBJECTIVES: 2, 3, 7
Origin and Evolution of Organics
ROADMAP OBJECTIVES: 1, 2, 3
Origin and Evolution of Organics in Planetary Systems
ROADMAP OBJECTIVES: 1, 3, 3
Origin of Irregular Satellites
ROADMAP OBJECTIVES: 1
Prebiotic Organics from Space
ROADMAP OBJECTIVES: 1, 2, 2, 3, 3, 4, 7, 7
Protist diversity in extreme environments
ROADMAP OBJECTIVES: 6, 7
Recovery of comet 85P/Boethin for the Deep Impact Extended Mission
ROADMAP OBJECTIVES: 2
Research Activities in the Astrobiology Analytical Laboratory
ROADMAP OBJECTIVES: 1, 2, 2, 3, 7
Sediment-buried basement deep biosphere
ROADMAP OBJECTIVES: 1, 3, 4, 5, 5, 5, 6, 6
Societal and Philosophical Aspects of Astrobiology
ROADMAP OBJECTIVES: 18
Studies in Planetary Formation and Evolution
ROADMAP OBJECTIVES: 8, 9, 11, 12
Studies of Organic Matter and Water in Meteorites
ROADMAP OBJECTIVES: 1, 8, 9, 11
The Main Belt distribution of basaltic asteroids
ROADMAP OBJECTIVES: 2
THE VYSOS PROJECT
ROADMAP OBJECTIVES: 1
Ultra-violet processing of ices in the Rosette Nebula
ROADMAP OBJECTIVES: 3
Understanding the Microbial Ecology of Geologically-based Chemolithoautotrophic Communities
ROADMAP OBJECTIVES: 2, 4
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