{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,8,5]],"date-time":"2024-08-05T06:01:21Z","timestamp":1722837681727},"reference-count":48,"publisher":"The Company of Biologists","issue":"16","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2009,8,15]]},"abstract":"<jats:p>Spatially regulated transcription of the pipe gene in ventral cells of the Drosophila ovary follicle cell epithelium is a key event that specifies progeny embryo dorsal-ventral (DV) polarity. pipeencodes ten putative protein isoforms, all of which exhibit similarity to vertebrate glycosaminoglycan-modifying enzymes. Expression of one of the isoforms, Pipe-ST2, in follicle cells has previously been shown to be essential for DV patterning. pipe is also expressed in the embryonic salivary gland and its expression there is required for normal viability. Here, we show that in addition to Pipe-ST2, seven of the other Pipe isoforms are expressed in the ovary, whereas all Pipe isoforms are abundantly expressed in the embryo. Of the ten isoforms, only Pipe-ST2 can restore ventral and lateral pattern elements to the progeny of otherwise pipe-null mutant females. By contrast, three Pipe isoforms, but not Pipe-ST2, support the production of a novel pipe-dependent epitope present in the embryonic salivary gland. These data indicate that differences in functional specificity, and presumably enzymatic specificity, are associated with several of the Pipe isoforms. In addition, we show that uniform expression of the Pipe-ST2 isoform in the follicle cell layer of females otherwise lacking pipe expression leads to the formation of embryos with a DV axis that is appropriately oriented with respect to the intrinsic polarity of the eggshell. This suggests the existence of a second mechanism that polarizes the Drosophila embryo, in addition to the ventrally restricted transcription of the pipe gene.<\/jats:p>","DOI":"10.1242\/dev.034413","type":"journal-article","created":{"date-parts":[[2009,7,24]],"date-time":"2009-07-24T17:49:07Z","timestamp":1248457747000},"page":"2779-2789","source":"Crossref","is-referenced-by-count":11,"title":["Distinct functional specificities are associated with protein isoforms encoded by the<i>Drosophila<\/i>dorsal-ventral patterning gene<i>pipe<\/i>"],"prefix":"10.1242","volume":"136","author":[{"given":"Zhenyu","family":"Zhang","sequence":"first","affiliation":[{"name":"Section of Molecular Cell and Developmental Biology and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xianjun","family":"Zhu","sequence":"additional","affiliation":[{"name":"Section of Molecular Cell and Developmental Biology and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leslie M.","family":"Stevens","sequence":"additional","affiliation":[{"name":"Section of Molecular Cell and Developmental Biology and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David","family":"Stein","sequence":"additional","affiliation":[{"name":"Section of Molecular Cell and Developmental Biology and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"237","reference":[{"key":"2021042621335670700_REF1","doi-asserted-by":"crossref","unstructured":"Anderson, K. 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