کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9131928 1160968 2005 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biosilica formation in spicules of the sponge Suberites domuncula: Synchronous expression of a gene cluster
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی ژنتیک
پیش نمایش صفحه اول مقاله
Biosilica formation in spicules of the sponge Suberites domuncula: Synchronous expression of a gene cluster
چکیده انگلیسی
The formation of spicules is a complicated morphogenetic process in sponges (phylum Porifera). The primmorph system was used to demonstrate that in the demosponge Suberites domuncula the synthesis of the siliceous spicules starts intracellularly and is dependent on the concentration of silicic acid. To understand spicule formation, a cluster of genes was isolated. In the center of this cluster is the silicatein gene, which codes for the enzyme that synthesizes spicules. This gene is flanked by an ankyrin repeat gene at one side and by a tumor necrosis factor receptor-associated factor and a protein kinase gene at the other side. All genes are strongly expressed in primmorphs and intact animals after exposure to silicic acid, and this expression is restricted to those areas where the spicule formation starts or where spicules are maintained in the animals. Our observations suggest that in S. domuncula a coordinated expression of physically linked genes is essential for the synthesis of the major skeletal elements.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Genomics - Volume 85, Issue 6, June 2005, Pages 666-678
نویسندگان
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