Biochem Biophys Res Commun 1989 Feb 15;1583:633-9. doi: 10.1016/0006-291x(89)92768-x.

Isolation of a putative collagen-like gene from the sea urchin Paracentrotus lividus.

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Using a Caenorhabditis elegans collagen probe we have isolated a 17.6 kb clone from a Paracentrotus lividus genomic library. Sequencing of nearly 2.6 kb identified five open reading frames flanked at both sides by splice site consensus sequences and coding for ninety-five uninterrupted Gly-X-Y repeats. Interestingly, three of the putative exons exhibit sizes which are identical to those featured by vertebrate fibrillar collagen genes, namely 54 bp and 99 bp. Hybridization of the Gly-X-Y encoding sequences to RNA extracted from different developmental stages identified a specific 6 kb transcript, which appears first at mid-gastrula, greatly increases at prism and then progressively accumulates until pluteus stage. Based on these data, we conclude that the genomic clone is likely to code for a developmentally regulated mRNA whose expression coincides with the reported time of appearance of collagenous molecules in the sea urchin embryo.

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Genes referenced: LOC100887844 LOC577694