PUBLICATION
valentino, a zebrafish gene required for normal hindbrain segmentation
- Authors
- Moens, C.B., Yan, Y.L., Appel, B., Force, A.G., and Kimmel, C.B.
- ID
- ZDB-PUB-970127-5
- Date
- 1996
- Source
- Development (Cambridge, England) 122: 3981-3990 (Journal)
- Registered Authors
- Appel, Bruce, Force, Allan G., Kimmel, Charles B., Moens, Cecilia, Yan, Yi-Lin
- Keywords
- zebrafish; hindbrain; segmentation; valentino; rhombomere
- MeSH Terms
-
- RNA, Messenger/isolation & purification
- Cell Transplantation
- In Situ Hybridization
- Avian Proteins*
- Maf Transcription Factors
- PubMed
- 9012518 Full text @ Development
Abstract
Mutational analysis can serve both to identify new genes essential for patterning embryonic development and to determine their functions. Here we describe the identification and phenotypic characterization of alleles of valentino, which we recovered in a genetic screen that sought to identify mutations in the zebrafish that disrupt region-specific gene expression patterns in the embryonic brain. valentino is required for normal hindbrain segmentation and the hindbrain of valentino mutant embryos is shortened by the length of one rhombomere. We demonstrate that valentino is required cell-autonomously in the development of rhombomeres 5 and 6, and propose that valentino functions in the subdivision and expansion of a common precursor region in the presumptive hindbrain into the definitive rhombomeres 5 and 6. These results provide genetic evidence for a two-segment periodicity in the hindbrain and suggest that this periodicity arises sequentially, through the specification and later subdivision of a two-rhombomere unit, or 'protosegment'.
Genes / Markers
Figure Gallery (4 images)
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping