Abstract:
UNLABELLED:The reproductive stage of Paracentrotus lividus strongly influences product quality that, in turn, impacts significantly on the market price. Large, compact and sweet gonads are preferred, and sensory attributes are positively related to the ratio of nutritive phagocytes to gametes. Gonads at advanced maturation stages, although larger, have less desirable attributes, being more watery and bitter especially in females. Therefore, the best compromise among size, texture, and taste needs to be reached. In this study, wild P. lividus were collected along coastal Sardinia, and gonads in the recovery, pre-mature, mature, and spent stages were analyzed by gel-based and by shotgun proteomics. A detailed characterization of the proteome changes occurring in gonads of both sexes along maturation was achieved, and significant modifications were seen in numerous proteins involved in nutrient accumulation in nutritive phagocytes, as well as in gamete biology and maturation. Adding to an improved understanding of the P. lividus reproductive cycle in its natural environment, the results described in this work may form the basis for defining novel protein markers and procedures for an easier sexing and staging, and for monitoring sea urchin gonad maturation cycles in aquaculture plants. Mass spectrometry data are deposited in ProteomeXchange (PXD004200). SIGNIFICANCE:The sensory quality of P. lividus gonads is strongly influenced by the reproductive cycle, with significant changes in flavor, texture, and size. A better knowledge of the protein profiles, patterns, and markers associated with gonad sex and maturation stage can have useful implications for understanding and monitoring these changes. One of these is the ability to identify protein profiles specifically associated with a given stage and, in perspective, to identify maturation and sex markers. The comprehensive proteomic evaluation achieved in this work was made possible by the application of combined gel-based and shotgun approaches. As a result, this study generated the largest proteomic dataset available in the literature for P. lividus, as well as a general picture of protein abundance changes occurring along maturation.
journal_name
J Proteomicsjournal_title
Journal of proteomicsauthors
Ghisaura S,Loi B,Biosa G,Baroli M,Pagnozzi D,Roggio T,Uzzau S,Anedda R,Addis MFdoi
10.1016/j.jprot.2016.05.035subject
Has Abstractpub_date
2016-07-20 00:00:00pages
63-72eissn
1874-3919issn
1876-7737pii
S1874-3919(16)30239-1journal_volume
144pub_type
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