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Updated: Dec 31, 2025

Single Nucleotide Polymorphism-sensitive FISH Detection of Locus-specific Ribosomal RNA Transcription in Drosophila melanogaster
Published on: March 28, 2025
The DNA polymerases of Drosophila melanogaster
Steven J Marygold1, Helen Attrill1, Elena Speretta2
1FlyBase, Department of Physiology, Development and Neuroscience, University of Cambridge , Cambridge, UK.
Abstract:
DNA synthesis during replication or repair is a fundamental cellular process that is catalyzed by a set of evolutionary conserved polymerases. Despite a large body of research, the DNA polymerases of Drosophila melanogaster have not yet been systematically reviewed, leading to inconsistencies in their nomenclature, shortcomings in their functional (Gene Ontology, GO) annotations and an under-appreciation of the extent of their characterization. Here, we describe the complete set of DNA polymerases in D. melanogaster, applying nomenclature already in widespread use in other species, and improving their functional annotation. A total of 19 genes encode the proteins comprising three replicative polymerases (alpha-primase, delta, epsilon), five translesion/repair polymerases (zeta, eta, iota, Rev1, theta) and the mitochondrial polymerase (gamma). We also provide an overview of the biochemical and genetic characterization of these factors in D. melanogaster. This work, together with the incorporation of the improved nomenclature and GO annotation into key biological databases, including FlyBase and UniProtKB, will greatly facilitate access to information about these important proteins.
Insights
This study systematically reviews DNA polymerases in Drosophila melanogaster, standardizing nomenclature and improving functional annotations for 19 genes. This facilitates access to crucial information on these essential replication and repair proteins.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- DNA polymerases are essential for replication and repair across species.
- Drosophila melanogaster DNA polymerases lack systematic review, leading to nomenclature and annotation inconsistencies.
- Accurate characterization of these enzymes is crucial for understanding cellular processes.
Purpose of the Study:
- To systematically review and standardize nomenclature for Drosophila melanogaster DNA polymerases.
- To improve functional (Gene Ontology) annotations for these enzymes.
- To provide a comprehensive overview of their biochemical and genetic characterization.
Main Methods:
- Systematic review of existing literature and databases.
- Application of established nomenclature from other species.
- Analysis and improvement of Gene Ontology annotations.
- Compilation of biochemical and genetic data.
Main Results:
- Identified and described the complete set of 19 DNA polymerase genes in Drosophila melanogaster.
- Classified them into replicative (alpha-primase, delta, epsilon), translesion/repair (zeta, eta, iota, Rev1, theta), and mitochondrial (gamma) polymerases.
- Improved nomenclature and functional annotations are now available.
Conclusions:
- Standardized nomenclature and enhanced functional annotations will improve data accessibility.
- This work facilitates future research on Drosophila melanogaster DNA polymerases.
- Integration into databases like FlyBase and UniProtKB is key for broad impact.
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