Proteogenomic Characterization of the Cement and Adhesive Gland of the Pelagic Gooseneck Barnacle Lepas anatifera

International Journal of Molecular Sciences

Daniela Almeida¹  Agostinho Antunes¹  Isabel Cunha¹  AndréM. Machado¹  Alexandre Campos¹  Dany Domínguez-Perez¹  Vitor Vasconcelos¹  LuísFilipe Castro¹  Josef Wissing²  Lothar Jänsch² 

[1] CIIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua General Norton de Matos s/n, Terminal de Cruzeiros do Porto de Leixões, 4450-208 Matosinhos, Portugal;Cellular Proteomics Research, Helmholtz Centre for Infection Research, Inhoffenstraße. 7, 38124 Braunschweig, Germany;

关键词: underwater adhesion;    cement protein;    shotgun proteomics;    iBAQ;    protein expression;    mass spectrometry;   

DOI  :  10.3390/ijms22073370

来源: DOAJ

【 摘 要 】

We focus on the stalked goose barnacle L. anatifera adhesive system, an opportunistic less selective species for the substrate, found attached to a variety of floating objects at seas. Adhesion is an adaptative character in barnacles, ensuring adequate positioning in the habitat for feeding and reproduction. The protein composition of the cement multicomplex and adhesive gland was quantitatively studied using shotgun proteomic analysis. Overall, 11,795 peptide sequences were identified in the gland and 2206 in the cement, clustered in 1689 and 217 proteinGroups, respectively. Cement specific adhesive proteins (CPs), proteases, protease inhibitors, cuticular and structural proteins, chemical cues, and many unannotated proteins were found, among others. In the cement, CPs were the most abundant (80.5%), being the bulk proteins CP100k and -52k the most expressed of all, and CP43k-like the most expressed interfacial protein. Unannotated proteins comprised 4.7% of the cement proteome, ranking several of them among the most highly expressed. Eight of these proteins showed similar physicochemical properties and amino acid composition to known CPs and classified through Principal Components Analysis (PCA) as new CPs. The importance of PCA on the identification of unannotated non-conserved adhesive proteins, whose selective pressure is on their relative amino acid abundance, was demonstrated.

【 授权许可】

Unknown