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The Disabled-1 (Dab1) gene encodes a key regulator of Reelin signaling. Reelin is a large glycoprotein secreted by neurons of the developing brain, particularly Cajal-Retzius cells . DAB1 functions downstream of Reln in a signaling pathway that controls cell positioning in the developing brain and during adult neurogenesis .
The spontaneous autosomal recessive scrambler mutation on chromosome 4 causes a deficiency of DAB1, encoding disabled-1, a protein involved in the signaling of the Reelin protein, lacking in the reeler mutant, [3] Dab1-scm homozygous mutants possess a reeler-like phenotype with respect to cell malpositioning in cerebellar cortex, hippocampus, and neocortex.
The yotari mouse is an autosomal recessive mutant. [1] It has a mutated disabled homolog 1 ( Dab1 ) gene. [ 2 ] This mutant mouse is recognized by unstable gait ("Yota-ru" in Japanese means "unstable gait") and tremor and by early deaths around the time of weaning .
5649 19699 Ensembl ENSG00000189056 ENSMUSG00000042453 UniProt P78509 Q60841 RefSeq (mRNA) NM_173054 NM_005045 NM_011261 NM_001310464 RefSeq (protein) NP_005036 NP_774959 NP_001297393 NP_035391 Location (UCSC) Chr 7: 103.47 – 103.99 Mb Chr 5: 22.09 – 22.55 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Reelin, encoded by the RELN gene, is a large secreted extracellular matrix ...
[1] DAB1 is a regulator protein downstream of the reelin receptors. This protein is located inside cells residing in the ventricular zone, displaying highest concentrations in migrating pyramidal cells. When either reelin or DAB1 are inactivated in mice, the resulting phenotypes are the same. In this case, the neurons are unable to migrate ...
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DAB2 mRNA is expressed in normal ovarian epithelial cells but is down-regulated or absent from ovarian carcinoma cell lines. The 770-amino acid predicted protein has an overall 83% identity with the mouse p96 protein, a putative mitogen-responsive phosphoprotein; homology is strongest in the amino-terminal end of the protein in a region corresponding to the phosphotyrosine interaction domain.
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