Expression of one sponge Iroquois homeobox gene in primmorphs from Suberites domuncula during canal formation

Evolution & Development
Sanja PerovicWerner E G Müller

Abstract

Sponges (Porifera) represent the evolutionary oldest multicellular animals. They are provided with the basic molecules involved in cell-cell and cell-matrix interactions. We report here the isolation and characterization of a complementary DNA from the sponge Suberites domuncula coding for the sponge homeobox gene, SUBDOIRX-a. The deduced polypeptide with a predicted Mr of 44,375 possesses the highly conserved Iroquois-homeodomain. We applied in situ hybridization to localize Iroquois in the sponge. The expression of this gene is highest in cells adjacent to the canals of the sponge in the medulla region. To study the expression of Iroquois during development, the in vitro primmorph system from S. domuncula was used. During the formation of these three-dimensional aggregates composed of proliferating cells, the expression of Iroquois depends on ferric iron and water current. An increased expression in response to water current is paralleled with the formation of canal-like pores in the primmorphs. It is suggested that Iroquois expression is involved in the formation of the aquiferous system, the canals in sponges and the canal-like structures in primmorphs.

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Citations

Mar 6, 2007·Journal of Molecular Evolution·Helena CetkovicVera Gamulin
Aug 16, 2003·Biomolecular Engineering·Werner E G MüllerHeinz C Schröder
Jul 31, 2008·Proceedings. Biological Sciences·Jaap A KaandorpWerner E G Müller
Jan 19, 2010·Development, Growth & Differentiation·Noriko Funayama
Jul 6, 2006·Applied and Environmental Microbiology·Heinz C SchröderWerner E G Müller
Apr 17, 2009·BMC Evolutionary Biology·Pierre KernerMichel Vervoort
Oct 6, 2005·Proceedings of the National Academy of Sciences of the United States of America·Aphrodite BilioniHelen McNeill
Jun 21, 2006·Journal of Molecular Evolution·Evelyn Richelle-MaurerCarole Borchiellini
Mar 27, 2007·Micron : the International Research and Review Journal for Microscopy·Matthias WiensWerner E G Müller
Jun 30, 2006·Seminars in Cell & Developmental Biology·Werner E G Müller
Apr 17, 2015·In Vitro Cellular & Developmental Biology. Animal·Carla Huete-StaufferCarlo Cerrano
Oct 27, 2016·Brain Structure & Function·Sheila Cardeña-NúñezMatías Hidalgo-Sánchez
May 20, 2006·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Carsten EckertWerner E G Müller
Feb 26, 2008·Molecular Biology and Evolution·Claire LarrouxBernard M Degnan
Mar 22, 2003·Die Naturwissenschaften·Werner E G MüllerHeinz C Schröder
Apr 29, 2011·The Journal of Experimental Biology·Lada Lukic-BilelaWerner E G Müller
Feb 8, 2005·The Journal of Experimental Biology·Sanja Perovic-OttstadtWerner E G Müller

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