CAP1 expression is developmentally regulated in Xenopus.

We have cloned and characterized a Xenopus member of the cyclase associated protein (CAP) gene family. xCAP1 is expressed as a maternal transcript, but is up-regulated prior to gastrulation and subsequently localizes to head mesenchyme, lens, otic vesicle, and trunk mesoderm including the pronephros. At different stages, the gene also appears to differentiate surface from deep (sensorial) ectoderm. As in Drosophila, Xenopus CAP1 is expressed in the developing eye, specifically in the differentiating lens. However, in distinction to Drosophila, Xenopus CAP1 does not express in periodically arrayed neural bands.