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| Content Provider | PubMed Central |
|---|---|
| Author | Njølstad, P. R. Molven, A. Apold, J. Fjose, A. |
| Abstract | The data presented in this report strongly suggest that the genome of the zebrafish, Brachydanio rerio, has a homeobox cluster which is equivalent to the murine Hox-2 locus. In support of this conclusion, we have found two closely linked zebrafish genes which are true homologues of the mouse Hox-2.1 and Hox-2.2 genes. Here we describe structural and functional properties of the zebrafish Hox-2.2 homologue hox-2.2. Furthermore, we have identified another zebrafish gene related to hox-2.2 which appears to correspond to the Hox-6.1 gene of the murine Hox-3 locus. In order to characterize the zebrafish hox-2.2 gene we have determined the genomic DNA sequence of a 3.4 kb SalI fragment. This revealed that the hox-2.2 transcription unit encodes a putative protein of 228 amino acids. The homeodomains of the murine Hox-2.2 and the zebrafish hox-2.2 proteins are almost identical and extensive sequence identity exists in other regions of the two proteins, which share 160 (70%) of the amino acid residues. Also in terms of expression, strong similarities were observed relative to the murine Hox-2.2 gene. Transcripts derived from zebrafish hox-2.2 start to accumulate when somite formation is initiated. Later in development these transcripts are detected mainly in the central nervous system. Reminiscent of Hox-2.2, the rostral boundary of zebrafish hox-2.2 expression is located in the posterior region of the hindbrain. Notably, untranslated regions of the hox-2.2 gene contain several short sequences closely related to a known homeodomain recognition sequence. |
| Starting Page | 515 |
| File Format | |
| ISSN | 14602075 |
| e-ISSN | 14602075 |
| Journal | The EMBO Journal |
| Issue Number | 2 |
| Volume Number | 9 |
| Language | English |
| Publisher Date | 1990-02-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Medicine Molecular Biology |
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