Journal
JOURNAL OF BIOLOGICAL CHEMISTRY
Volume 287, Issue 23, Pages 19367-19376Publisher
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DOI: 10.1074/jbc.M112.352005
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- Government of the Principality of Monaco
- Ministere Francais de l'Enseignement Superieur et de la Recherche
- Ministere Francais de l'Enseignement Superieur et de la Recherche, Ecole Doctorale Diversit, du Vivant, Universite Pierre et Marie Curie [392]
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We report here for the first time the isolation and characterization of a protein from the organic matrix (OM) of the sclerites of the alcyonarian, Corallium rubrum. This protein named scleritin is one of the predominant proteins extracted from the EDTA-soluble fraction of the OM. The entire open reading frame (ORF) was obtained by comparing amino acid sequences from de novo mass spectrometry and Edman degradation with an expressed sequence tag library dataset of C. rubrum. Scleritin is a secreted basic phosphorylated protein which exhibits a short amino acid sequence of 135 amino acids and a signal peptide of 20 amino acids. From specific antibodies raised against peptide sequences of scleritin, we obtained immunolabeling of scleroblasts and OM of the sclerites which provides information on the biomineralization pathway in C. rubrum.
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