کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10933717 | 1093823 | 2008 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
SrfB, a member of the Serum Response Factor family of transcription factors, regulates starvation response and early development in Dictyostelium
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
بیولوژی سلول
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The Serum Response Factor (SRF) is an important regulator of cell proliferation and differentiation. Dictyostelium discoideum srfB gene codes for an SRF homologue and is expressed in vegetative cells and during development under the control of three alternative promoters, which show different cell-type specific patterns of expression. The two more proximal promoters directed gene transcription in prestalk AB, stalk and lower-cup cells. The generation of a strain where the srfB gene has been interrupted (srfBâ) has shown that this gene is required for regulation of actin-cytoskeleton-related functions, such as cytokinesis and macropinocytosis. The mutant failed to develop well in suspension, but could be rescued by cAMP pulsing, suggesting a defect in cAMP signaling. srfBâ cells showed impaired chemotaxis to cAMP and defective lateral pseudopodium inhibition. Nevertheless, srfBâ cells aggregated on agar plates and nitrocellulose filters 2Â h earlier than wild type cells, and completed development, showing an increased tendency to form slug structures. Analysis of wild type and srfBâ strains detected significant differences in the regulation of gene expression upon starvation. Genes coding for lysosomal and ribosomal proteins, developmentally-regulated genes, and some genes coding for proteins involved in cytoskeleton regulation were deregulated during the first stages of development.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Developmental Biology - Volume 316, Issue 2, 15 April 2008, Pages 260-274
Journal: Developmental Biology - Volume 316, Issue 2, 15 April 2008, Pages 260-274
نویسندگان
MarÃa Galardi-Castilla, Barbara Pergolizzi, Gareth Bloomfield, Jason Skelton, Al Ivens, Robert R. Kay, Salvatore Bozzaro, Leandro Sastre,