PUBLICATION
Massively parallel sequencing identifies the gene Megf8 with ENU-induced mutation causing heterotaxy
- Authors
- Zhang, Z., Alpert, D., Francis, R., Chatterjee, B., Yu, Q., Tansey, T., Sabol, S.L., Cui, C., Bai, Y., Koriabine, M., Yoshinaga, Y., Cheng, J.F., Chen, F., Martin, J., Schackwitz, W., Gunn, T.M., Kramer, K.L., De Jong, P.J., Pennacchio, L.A., and Lo, C.W.
- ID
- ZDB-PUB-090217-44
- Date
- 2009
- Source
- Proceedings of the National Academy of Sciences of the United States of America 106(9): 3219-3224 (Journal)
- Registered Authors
- Kramer, Kenneth
- Keywords
- cardiogenesis, left–right, nodal
- MeSH Terms
-
- Active Transport, Cell Nucleus
- Amino Acid Sequence
- Animals
- Base Sequence
- Body Patterning*
- Cells, Cultured
- Embryo, Nonmammalian/drug effects
- Embryo, Nonmammalian/embryology
- Embryo, Nonmammalian/metabolism
- Ethylnitrosourea/pharmacology*
- Gene Expression Regulation, Developmental/drug effects
- Humans
- Membrane Proteins/chemistry
- Membrane Proteins/genetics
- Membrane Proteins/metabolism*
- Molecular Sequence Data
- Mutation/genetics
- Nodal Protein/metabolism
- Sequence Alignment
- Signal Transduction
- Zebrafish/embryology
- Zebrafish/genetics
- Zebrafish/metabolism
- Zebrafish Proteins/chemistry
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism*
- PubMed
- 19218456 Full text @ Proc. Natl. Acad. Sci. USA
Citation
Zhang, Z., Alpert, D., Francis, R., Chatterjee, B., Yu, Q., Tansey, T., Sabol, S.L., Cui, C., Bai, Y., Koriabine, M., Yoshinaga, Y., Cheng, J.F., Chen, F., Martin, J., Schackwitz, W., Gunn, T.M., Kramer, K.L., De Jong, P.J., Pennacchio, L.A., and Lo, C.W. (2009) Massively parallel sequencing identifies the gene Megf8 with ENU-induced mutation causing heterotaxy. Proceedings of the National Academy of Sciences of the United States of America. 106(9):3219-3224.
Abstract
Forward genetic screens with ENU (N-ethyl-N-nitrosourea) mutagenesis can facilitate gene discovery, but mutation identification is often difficult. We present the first study in which an ENU- induced mutation was identified by massively parallel DNA sequencing. This mutation causes heterotaxy and complex congenital heart defects and was mapped to a 2.2-Mb interval on mouse chromosome 7. Massively parallel sequencing of the entire 2.2-Mb interval identified 2 single-base substitutions, one in an intergenic region and a second causing replacement of a highly conserved cysteine with arginine (C193R) in the gene Megf8. Megf8 is evolutionarily conserved from human to fruit fly, and is observed to be ubiquitously expressed. Morpholino knockdown of Megf8 in zebrafish embryos resulted in a high incidence of heterotaxy, indicating a conserved role in laterality specification. Megf8(C193R) mouse mutants show normal breaking of symmetry at the node, but Nodal signaling failed to be propagated to the left lateral plate mesoderm. Videomicroscopy showed nodal cilia motility, which is required for left-right patterning, is unaffected. Although this protein is predicted to have receptor function based on its amino acid sequence, surprisingly confocal imaging showed it is translocated into the nucleus, where it is colocalized with Gfi1b and Baf60C, two proteins involved in chromatin remodeling. Overall, through the recovery of an ENU-induced mutation, we uncovered Megf8 as an essential regulator of left-right patterning.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping