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Updated: Feb 8, 2026

Genome-wide Analysis using ChIP to Identify Isoform-specific Gene Targets
Published on: July 7, 2010
IsopiRBank: a research resource for tracking piRNA isoforms
Huan Zhang1, Asim Ali1, Jianing Gao1
1Hefei National Laboratory for Physical Sciences at Microscale, The First Affiliated Hospital of USTC, USTC-SJH Joint Center of Human Reproduction and Genetics, The CAS Key Laboratory of Innate Immunity and Chronic Diseases, School of Life Sciences, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Collaborative Innovation Center of Genetics and Development, Collaborative Innovation Center for Cancer Medicine, Hefei, Anhui 230027, China.
PIWI-interacting RNA (piRNA) isoforms, variations of canonical piRNAs, were identified across four species. The IsopiRBank database catalogs these isoforms, enabling further research into piRNA biology and function.
Area of Science:
- * Molecular Biology
- * Genomics
- * Bioinformatics
Background:
- * PIWI-interacting RNAs (piRNAs) are crucial for germline gene regulation.
- * piRNA length variations (isoforms) have been observed, but their extent and function are unclear.
Purpose of the Study:
- * To identify and characterize piRNA isoforms across multiple species.
- * To establish a comprehensive database for piRNA isoform research.
Main Methods:
- * Data mining of 2154 small RNA sequencing datasets.
- * Identification and classification of piRNA isoforms based on 5' or 3' end variations.
- * Development of the IsopiRBank database.
Main Results:
- * Identified over 8.7 million piRNA isoforms from 175,454 canonical piRNAs across human, mouse, zebrafish, and fruit fly.
- * Classified isoforms based on sequence variations.
- * Created IsopiRBank with detailed annotations including expression, classification, and genomic origin.
Conclusions:
- * IsopiRBank is the first integrated resource for piRNA isoforms.
- * The database facilitates further analysis, including target prediction and enrichment analysis.
- * This resource aims to advance the understanding of piRNA biology.
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