Characterization and Identification of Cryptic Biopeptides in Carya illinoinensis (Wangenh K. Koch) Storage Proteins

The objective of this research was to identify and characterize the encoded peptides present in nut storage proteins of Carya illinoinensis. It was found, through in silico prediction, proteomic analysis, and MS spectrometry, that bioactive peptides were mainly found in albumin and glutelin fractions. Glutelin was the major fraction with ~53% of the nut storage proteins containing at least 21 peptides with different putative biological activities, including antihypertensives, antioxidants, immunomodulators, protease inhibitors, and inhibitors of cell cycle progression in cancer cells. Data showed that using 50 μg/mL tryptic digests of enriched peptides obtained from nut glutelins is able to induce up to 19% of apoptosis in both HeLa and CasKi cervical cancer cells. To our knowledge, this is the first report that shows the potential value of the nut-encoded peptides to be considered as adjuvants in cancer therapies

Primjena plinske kromatografije u kombinaciji s masenom spektrometrijom za karakterizaciju hlapljivih spojeva tradicionalnih meksičkih pića proizvedenih iz Agave

Ethnic Agave alcoholic beverages such as raicilla, sisal, tequila, mezcal, bacanora, sotol and pulque have been analyzed by gas chromatography and headspace solid-phase microextraction- gas chromatography-mass spectrometry (HS-SPME-GC-MS). There were 105 compounds identified, eleven were classified as major compounds and the others were classified as minor compounds. Seventeen minor compounds could be used as authenticity markers since they were beverage specific. Cluster analysis (CA) showed that Agave alcoholic beverages could be distinguished by multivariate analysis of major compounds; however, the analysis of minor compounds provided a better fingerprinting.Plinskom kromatografijom i mikroekstrakcijom na čvrstoj fazi, u kombinaciji s plinskom kromatografijom i masenom spektrometrijom (HS-SPME-GC-MS), ispitani su uzorci tradicionalnih meksičkih pića proizvedenih iz Agave (raicilla, sisal, tequila, mezcal, bacanora, sotol i pulque). Identificirano je 105 spojeva, od čega 11 glavnih sastojaka. Utvrđeno je da se za markere autentičnosti pojedinih pića može upotrijebiti 17 sporednih sastojaka. Razvrstavanjem uzoraka (engl. cluster analysis – CA) dokazano je da se tradicionalna meksička pića proizvedena iz Agave mogu razlikovati multivarijantnom analizom glavnih sastojaka, a analiza sporednih sastojaka omogućava točnije utvrđivanje porijekla pića