Related Experiment Video
Updated: May 15, 2026
11:27
X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050
Published on: May 13, 2020
Multifunctional enzymes in archaea: promiscuity and moonlight.
Baolei Jia1, Gang-Won Cheong, Shihong Zhang
1College of Plant Sciences, Jilin University, Changchun, China. baoleijia@jlu.edu.cn
Extremophiles : Life Under Extreme Conditions
|January 4, 2013
Summary
Archaea enzymes from extreme environments show dual functions, offering insights into protein evolution and biotechnological applications. Studying these promiscuous enzymes aids protein engineering and understanding early life.
Area of Science:
- Biochemistry
- Molecular Biology
- Evolutionary Biology
Background:
- Archaea inhabit extreme environments, producing unique enzymes with industrial and scientific potential.
- Many archaeal enzymes exhibit moonlighting, performing multiple functions beyond their primary catalytic activity.
- Understanding these promiscuous enzymes is crucial for biochemistry and evolutionary studies.
Purpose of the Study:
- To review known archaeal enzymes with single or multiple functions.
- To summarize biochemical properties and structural data of these enzymes.
- To explore methods for discovering and characterizing enzyme moonlighting.
Main Methods:
- Literature review of archaeal enzymes and their characterized functions.
- Analysis of biochemical and structural data for enzymes exhibiting promiscuity.
- Summary of techniques used for serendipitous discovery of enzyme moonlighting.
Main Results:
- Catalog of archaeal enzymes with diverse catalytic and moonlighting activities.
- Detailed biochemical and structural insights into enzyme promiscuity mechanisms.
- Compilation of methodologies for identifying novel enzyme functions.
Conclusions:
- Archaeal enzymes with dual functions provide valuable models for protein evolution.
- Knowledge of these enzymes can drive advancements in protein engineering and biotechnology.
- Further study of promiscuous enzymes offers clues to enzyme evolution on Earth.
Related Concept Videos
01:29Overview of Archaea
Archaea, named after the Archaean eon, represent a unique domain of life, distinct from bacteria and eukaryotes, with remarkable traits. Their cellular and molecular features, ecological adaptability, and industrial relevance highlight their importance in understanding life processes and leveraging biotechnology.Cellular and Molecular CharacteristicsA defining feature of archaea is their unique membrane composition. Archaeal membranes contain ether-linked isoprenoid lipids, which confer...
01:23Surface Appendages of Archaea
Archaeal surface appendages are highly specialized structures essential for environmental adaptation, encompassing roles in adhesion, biofilm formation, and motility. Among these appendages, pili and archaella stand out for their distinct morphologies and functionalities, enabling archaea to thrive in diverse and often extreme environments.Pili: Adhesion and Biofilm FormationPili are filamentous structures assembled from pilin protein subunits, primarily contributing to adhesion and biofilm...
01:29Diversity of Archaea IV
Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist thermal...
01:27Diversity of Archaea III
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like environments.Morphological...
01:24Diversity of Archaea II
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
01:30Diversity of Archaea I
Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...