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15000 unique zebrafish EST clusters and their future use in microarray for profiling gene expression patterns during

Jane Lo1, Sorcheng Lee, Min Xu

  • 1Functional Genomics Lab, Institute of Molecular and Cell Biology, Singapore 117609.

Genome Research
|March 6, 2003
PubMed
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This study identified novel zebrafish expressed sequence tags (ESTs) complementary to public databases, aiding gene annotation. Microarray analysis revealed coordinated gene expression crucial for zebrafish embryogenesis and organogenesis.

Area of Science:

  • Developmental Biology
  • Genomics
  • Molecular Biology

Background:

  • Zebrafish (Danio rerio) are a key model organism for studying vertebrate development.
  • Comprehensive gene expression profiling is essential for understanding embryogenesis and organogenesis.

Purpose of the Study:

  • To identify novel zebrafish expressed sequence tags (ESTs) and create a complementary dataset for gene annotation.
  • To profile gene expression patterns during zebrafish embryonic development using a custom cDNA microarray.
  • To investigate gene coordination networks underlying zebrafish embryogenesis.

Main Methods:

  • Expressed sequence tag (EST) clustering and database comparison (UniGene, non-redundant protein database).
  • cDNA microarray construction representing ~3100 unique zebrafish cDNA clusters.

Related Experiment Videos

  • Gene expression profiling across six embryonic stages (cleavage to hatching).
  • K-means clustering for analyzing expression data and identifying co-expressed genes.

    • Main Results:

    • 15,590 unique zebrafish EST clusters were identified, with a significant portion being novel compared to existing databases.
    • 7,824 unique clusters matched known or predicted proteins, aiding functional annotation.
    • Microarray analysis revealed coordinated expression patterns, particularly for muscle-specific genes during myogenesis.
    • Identification of genes involved in developmental processes and potential novel genes for organogenesis.

    Conclusions:

    • The generated EST set is complementary to public databases and valuable for zebrafish genome annotation.
    • Microarray technology combined with the zebrafish model effectively reveals gene coordination networks in embryogenesis.
    • This approach aids in identifying novel genes critical for organogenesis and understanding developmental processes.