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Fgf genes in the basal chordate Ciona intestinalis
Yutaka Satou1, Kaoru S Imai, Nori Satoh
1Department of Zoology, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan. yutaka@ascidian.zool.kyoto-u.ac.jp
Development Genes and Evolution
|October 10, 2002
Summary
Researchers identified six fibroblast growth factor (FGF) genes in the basal chordate Ciona intestinalis. This discovery aids in understanding the evolutionary relationships and diversification of vertebrate FGF families.
Area of Science:
- Developmental Biology
- Evolutionary Biology
- Genomics
Background:
- Fibroblast growth factors (FGFs) are crucial for vertebrate embryonic development and adult functions.
- The evolutionary relationships among vertebrate FGFs are not fully understood due to sequence divergence.
Purpose of the Study:
- To identify and characterize FGF genes in the basal chordate Ciona intestinalis.
- To gain insights into the early evolution and diversification of FGF gene families.
Main Methods:
- Phylogenetic analysis of identified FGF genes.
- Comparative genomics using whole genome shotgun sequences of Ciona intestinalis.
Main Results:
- Six FGF genes were identified in Ciona intestinalis.
- Two genes were confidently assigned to vertebrate FGF8/17/18 and FGF11/12/13/14 subfamilies.
- Three additional genes were tentatively assigned to FGF3/7/10/22, FGF4/5/6, and FGF9/16/20 subfamilies, with one gene unassigned.
Conclusions:
- The identification of six FGF genes in a basal chordate provides a framework for understanding FGF subfamily evolution.
- This study sheds light on the diversification of FGF genes prior to the emergence of vertebrates.