Molecular insight into taste and aroma of sliced dry-cured ham induced by protein degradation undergone high-pressure conditions.

Affiliation

Department of Zoology, Genetics and Physical Anthropology, University of Santiago de Compostela, Santiago de Compostela 15872, Spain. Electronic address: [Email]

Abstract

High pressure processing (HPP) is currently being developed to increase the shelf-life of sliced dry-cured ham in convenience package without detrimental effects on texture and sensorial characteristics. This study is focused on protein degradation under pressure conditions and its contribution to taste and aroma. Samples of sliced dry-cured ham undergone HPP (600 Pa, 0-35 °C) were analyzed from different approaches including proteomic and chemical analysis (amino acids and volatile compounds). Proteomic analysis revealed that high-pressure conditions caused a higher level of proteolysis, displaying that actin (ACTC1) was differentially degraded, unlike myosin. Furthermore, main Strecker metabolites-isoleucine and leucine-were more abundant at lower temperatures as opposed to 2-methyl butanal and 3-methyl butanal under HPP. Moreover, this study confirmed that HPP affected positively linear aldehydes (pentanal, hexanal, heptanal and nonanal) because of produce a decrease of them, which could improve flavor and taste of dry-cured ham.

Keywords

Linear and branched aldehydes,Myofibrillar proteins,Proteolysis and lipid oxidation,Strecker metabolites,