Reference - Detail
| RRC ID | 46345 |
|---|---|
| Author | Ghai V, Smit RB, Gaudet J. |
| Title | Transcriptional regulation of HLH-6-independent and subtype-specific genes expressed in the Caenorhabditis elegans pharyngeal glands. |
| Journal | Mech Dev |
| Abstract |
The Caenorhabditis elegans pharyngeal glands represent one of five cell types in the pharynx. We have previously shown that the bHLH transcription factor, HLH-6, is required for gland development and for expression of many, but not all, gland genes (Smit et al., 2008). Here, we have identified additional gland-expressed genes and find that transcriptional regulatory inputs other than HLH-6 are necessary for their regulation. We demonstrate that at least two hlh-6 independent gland genes, nas-12 and Y8A9A.2, require a cis-acting motif (HRL3- Hlh-6 Regulatory eLement 3), previously described based on its requirement for hlh-6 expression (Ghai and Gaudet, 2008). We also show that expression of the gland-expressed genes, ZK596.1, scl-3, wrt-3, and Y76B12C.3, rely on cis-elements and trans-acting factor(s) other than HLH-6 and HRL3. In addition, we show that negative regulatory mechanisms are employed to refine the spatial expression of some genes, resulting in expression in only a subset of the five gland cells. We show that one of these genes, Y8A9A.2, is negatively regulated by the NHR transcription factor encoded by nhr-48, which represses Y8A9A.2 expression in the g1A cells. We also show that another gene expressed in the reciprocal subset of gland cells, phat-5, is negatively regulated in the g1P and g2 cells by an unknown factor acting through a conserved cis-element in the phat-5 promoter. Overall, this work reveals levels of regulation of gene expression in a single cell type beyond that previously known, and suggests mechanisms by which the different gland sub-types are distinguished. |
| Volume | 129(9-12) |
| Pages | 284-97 |
| Published | 2012-1-1 |
| DOI | 10.1016/j.mod.2012.06.005 |
| PII | S0925-4773(12)00058-5 |
| PMID | 22759833 |
| MeSH | Animals Basic Helix-Loop-Helix Transcription Factors / biosynthesis Basic Helix-Loop-Helix Transcription Factors / genetics* Basic Helix-Loop-Helix Transcription Factors / metabolism Caenorhabditis elegans / genetics* Caenorhabditis elegans / metabolism Caenorhabditis elegans Proteins / biosynthesis Caenorhabditis elegans Proteins / genetics* Caenorhabditis elegans Proteins / metabolism Gene Expression Regulation, Developmental* Organogenesis / genetics Pharynx / growth & development Pharynx / metabolism Pharynx / physiology* Promoter Regions, Genetic Transcription Factors / genetics Transcription Factors / metabolism Transcription, Genetic |
| IF | 2.126 |
| Times Cited | 5 |
| WOS Category | DEVELOPMENTAL BIOLOGY |
| Altmetric score |
オルトメトリクス指標項目
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| The most frequently cited source | X(Twitter) |
| Total number of mentions | 1 |
| Altmetric score changes over past 6months | 0.0 |
| Resource | |
| C.elegans | tm299 |