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Primordial Germ Cell Cryopreservation and Revival of Drosophila Strains
Published on: December 1, 2023
New genes in Drosophila quickly become essential
Sidi Chen1, Yong E Zhang, Manyuan Long
1Department of Ecology and Evolution, The University of Chicago, 1101 East 57th Street, Chicago, IL 60637, USA.
Science (New York, N.Y.)
|December 18, 2010
Summary
Newly evolved genes in Drosophila rapidly acquire essential functions for survival and development. Around 30% of young genes are crucial, with their silencing causing developmental defects and lethality.
Area of Science:
- Evolutionary biology
- Genetics
- Developmental biology
Background:
- Understanding the origin and evolution of essential genes is key to comprehending fundamental biological processes.
- New genes continuously arise in genomes, but their functional significance, especially essentiality, remains largely unexplored.
Purpose of the Study:
- To investigate the origin, evolution, and essentiality of young protein-coding genes in Drosophila.
- To determine the proportion of newly arisen genes that are essential for organism viability and development.
Main Methods:
- Identification and phenotyping of 195 young protein-coding genes in Drosophila (3-35 million years old).
- Gene knockdown using RNA interference (RNAi) to assess essentiality.
- Analysis of developmental stages (larval and pupal) and cellular/developmental defects upon gene silencing.
Main Results:
- Approximately 30% of newly arisen genes were found to be essential for Drosophila viability.
- The proportion of essential genes remained consistent across different evolutionary age groups studied.
- Constitutive silencing of these young essential genes led to high lethality, particularly in the pupal stage, and also affected larval stages.
- Lethality was associated with diverse cellular and developmental defects, including organ formation and patterning issues.
Conclusions:
- New genes frequently and rapidly evolve essential functions shortly after their origin.
- These newly evolved essential genes play significant roles in organismal development.
- The study highlights the dynamic nature of gene evolution and the rapid acquisition of critical functions by new genes.
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