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Coupling proteomics and transcriptomics for the identification of novel and variant forms of mollusk shell proteins: a study with P. margaritifera.

TitreCoupling proteomics and transcriptomics for the identification of novel and variant forms of mollusk shell proteins: a study with P. margaritifera.
Type de publicationJournal Article
Year of Publication2011
AuteursBerland, S, Marie, A, Duplat, D, Milet, C, Sire, JYves, Bédouet, L
JournalChembiochem
Volume12
Ticket6
Pagination950-61
Date Published2011 Apr 11
ISSN1439-7633
Mots-clésAmino Acid Sequence, Animals, Databases, Genetic, Gene Expression Profiling, Kinesin, Molecular Sequence Data, Mollusca, Proteins, Proteomics, Sequence Alignment
Résumé

Shell matrix proteins from Pinctada margaritifera were characterized by combining proteomics analysis of shell organic extracts and transcript sequences, both obtained from the shell-forming cell by using the suppression subtractive hybridization method (SSH) and from an expressed sequence tag (EST) database available from Pinctada maxima mantle tissue. Some of the identified proteins were homologues to proteins reported in other mollusk shells, namely lysine-rich matrix proteins (KRMPs), shematrins and molluscan prismatic and nacreous layer 88 kDa (MPN88). Sequence comparison within and among Pinctada species pointed to intra- and interspecies variations relevant to polymorphism and to evolutionary distance, respectively. In addition, a novel shell matrix protein, linkine was identified. BLAST analysis of the peptide sequences obtained from the shell of P. margaritifera against the EST database revealed the presence of additional proteins: two proteins similar to the Pif97 protein that was identified in the shell of P. fucata, a chitinase-like protein previously identified in Crassostrea gigas, two chitin-binding proteins, and two incomplete sequences of proteins unknown so far in mollusk shells. Combining proteomics and transcriptomics analysis we demonstrate that all these proteins, including linkine, are addressed to the shell. Retrieval of motif-forming sequences, such as chitin-binding, with functional annotation from several peptides nested in the shell could indicate protein involvement in shell patterning.

DOI10.1002/cbic.201000667
Alternate JournalChembiochem
Identifiant (ID) PubMed21404418