PUBLICATION
SmyD1, a histone methyltransferase, is required for myofibril organization and muscle contraction in zebrafish embryos
- Authors
- Tan, X., Rotllant, J., Li, H., Dedeyne, P., and Du, S.J.
- ID
- ZDB-PUB-060216-9
- Date
- 2006
- Source
- Proceedings of the National Academy of Sciences of the United States of America 103(8): 2713-2718 (Journal)
- Registered Authors
- Du, Shao Jun (Jim), Rotllant, Josep
- Keywords
- skeletal muscle, sarcomere, myofiber maturation, cardiac muscle, transgenic fish
- MeSH Terms
-
- Alternative Splicing
- Animals
- Cell Differentiation
- Embryo, Nonmammalian/chemistry
- Embryo, Nonmammalian/enzymology
- Heart/embryology
- Heart Defects, Congenital/embryology
- Heart Defects, Congenital/genetics
- Histone-Lysine N-Methyltransferase/genetics
- Histone-Lysine N-Methyltransferase/physiology*
- Molecular Sequence Data
- Muscle Contraction/genetics*
- Muscle, Skeletal/abnormalities
- Muscle, Skeletal/cytology
- Myocardium/cytology
- Myofibrils/ultrastructure*
- Protein Methyltransferases
- RNA, Messenger/analysis
- RNA, Messenger/metabolism
- Zebrafish/embryology*
- Zebrafish/metabolism
- Zebrafish Proteins/genetics
- Zebrafish Proteins/physiology*
- PubMed
- 16477022 Full text @ Proc. Natl. Acad. Sci. USA
Citation
Tan, X., Rotllant, J., Li, H., Dedeyne, P., and Du, S.J. (2006) SmyD1, a histone methyltransferase, is required for myofibril organization and muscle contraction in zebrafish embryos. Proceedings of the National Academy of Sciences of the United States of America. 103(8):2713-2718.
Abstract
Histone modification has emerged as a fundamental mechanism for control of gene expression and cell differentiation. Recent studies suggest that SmyD1, a novo SET domain-containing protein, may play a critical role in cardiac muscle differentiation. However, its role in skeletal muscle development and its mechanism of actions remains elusive. Here we report that SmyD1a and SmyD1b, generated by alternative splicing of SmyD1 gene, are histone methyltransferases that play a key role in skeletal and cardiac muscle contraction. SmyD1a and SmyD1b are specifically expressed in skeletal and cardiac muscles of zebrafish embryos. Knockdown of SmyD1a and SmyD1b expression by morpholino antisense oligos resulted in malfunction of skeletal and cardiac muscles. The SmyD1 morphant embryos (embryos injected with morpholino oligos) could not swim and had no heartbeat. Myofibril organization in the morphant embryos was severely disrupted. The affected myofibers appeared as immature fibers with centrally located nuclei. Together, these data indicate that SmyD1a and SmyD1b are histone methyltransferases and play a critical role in myofibril organization during myofiber maturation.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping