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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Molecular cloning and expression study of Xenopus latent TGF-beta binding protein-1 (LTBP-1).

Latent transforming growth factor beta binding protein-1 (LTBP-1) is important in regulating the localization and activation of transforming growth factor beta. In this paper is reported the isolation of the full-length Xenopus LTBP-1 cDNA from screening a neurula embryo cDNA library. Sequence analysis of XLTBP-1 cDNA revealed an open reading frame of 4518 bp encoding a 1398 amino acid protein with a molecular mass of 154.1 kDa and an isoelectric point of 4.65. The Xenopus XLTBP-1 shares 61 and 65% amino acid identity with the mouse and human LTBP-1, respectively. It contains 17 epidermal growth factor-like motifs and four eight-cysteine repeats (8-Cys). RNase protection assay revealed that XLTBP-1 is a maternal and zygotic gene, while whole-mount in situ hybridization analysis performed on embryos at different stages showed that during early Xenopus development, XLTBP-1 mRNA is expressed in the Spemann organizer, prechordal and chordal mesoderm, and later on in the organizer derived tissues. These findings suggest an important role for XLTBP-1 in embryo axis formation.[1]


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