Abstract:
:The Drosophila scratch (scrt) gene is expressed in most or all neuronal precursor cells and encodes a predicted zinc finger transcription factor closely related to the product of the mesoderm determination gene snail (sna). Adult flies homozygous for scrt null alleles have a reduced number of photoreceptors in the eye, and embryos lacking the function of both scrt and the pan-neural gene deadpan (dpn), which encodes a basic helix-loop-helix (bHLH) protein, exhibit a significant loss of neurons. Conversely, ectopic expression of a scrt transgene during embryonic and adult development leads to the production of supernumerary neurons. Consistent with scrt functioning as a transcription factor, various genes are more broadly expressed than normal in scrt null mutants. Reciprocally, these same genes are expressed at reduced levels in response to ectopic scrt expression. We propose that scrt promotes neuronal cell fates by suppressing expression of genes promoting non-neuronal cell fates. We discuss the similarities between the roles of the ancestrally related scrt, sna, and escargot (esc) genes in regulating cell fate choices.
journal_name
Genes Devjournal_title
Genes & developmentauthors
Roark M,Sturtevant MA,Emery J,Vaessin H,Grell E,Bier Edoi
10.1101/gad.9.19.2384subject
Has Abstractpub_date
1995-10-01 00:00:00pages
2384-98issue
19eissn
0890-9369issn
1549-5477journal_volume
9pub_type
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journal_title:Genes & development
pub_type: 杂志文章
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journal_title:Genes & development
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journal_title:Genes & development
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journal_title:Genes & development
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更新日期:1987-09-01 00:00:00
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pub_type: 杂志文章
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:1997-05-15 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:1998-06-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章,评审
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更新日期:2002-08-15 00:00:00
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pub_type: 杂志文章
doi:10.1101/gad.3.7.1035
更新日期:1989-07-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
doi:10.1101/gad.6.12a.2382
更新日期:1992-12-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
doi:10.1101/gad.5.6.1022
更新日期:1991-06-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:1999-12-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:2002-06-15 00:00:00
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journal_title:Genes & development
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doi:10.1101/gad.3.7.1062
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更新日期:1999-07-01 00:00:00
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journal_title:Genes & development
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更新日期:2008-07-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:2007-05-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:1998-03-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:1987-09-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:1995-03-01 00:00:00
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journal_title:Genes & development
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更新日期:2006-02-15 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:2017-10-01 00:00:00