|
1
|
Giulia S, Patrizia R, Chiara C, Carlo B, Erica L. Acrylamide in coffee: what is known and what still needs to be explored. A review. Food Chem 2022; 393:133406. [DOI: 10.1016/j.foodchem.2022.133406] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 05/18/2022] [Accepted: 06/03/2022] [Indexed: 12/12/2022]
|
|
2
|
Andrea M, Francesco EF, Sergio I, Alessandra G, Maria AM, Cinzia C, Lorenzo B, Arianna M, Cecilia C, Patrizia R, Laura T, Giuseppe LR, Sergio L, Laura B. Identification of a new R3 MYB type repressor and functional characterization of the members of the MBW transcriptional complex involved in anthocyanin biosynthesis in eggplant (S. melongena L.). PLoS One 2020; 15:e0232986. [PMID: 32407419 PMCID: PMC7224497 DOI: 10.1371/journal.pone.0232986] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/24/2020] [Indexed: 12/13/2022] Open
Abstract
Here we focus on the highly conserved MYB-bHLH-WD repeat (MBW) transcriptional complex model in eggplant, which is pivotal in the transcriptional regulation of the anthocyanin biosynthetic pathway. Through a genome-wide approach performed on the recently released Eggplant Genome (cv. 67/3) previously identified, and reconfirmed by us, members belonging to the MBW complex (SmelANT1, SmelAN2, SmelJAF13, SmelAN1) were functionally characterized. Furthermore, a regulatory R3 MYB type repressor (SmelMYBL1), never reported before, was identified and characterized as well. Through a qPCR approach, we revealed specific transcriptional patterns of candidate genes in different plant tissue/organs at two stages of fruit development. Two strategies were adopted for investigating the interactions of bHLH partners (SmelAN1, SmelJAF13) with MYB counterparts (SmelANT1, SmelAN2 and SmelMYBL1): Yeast Two Hybrid (Y2H) and Bimolecular Fluorescent Complementation (BiFC) in A. thaliana mesophylls protoplast. Agro-infiltration experiments highlighted that N. benthamiana leaves transiently expressing SmelANT1 and SmelAN2 showed an anthocyanin-pigmented phenotype, while their co-expression with SmelMYBL1 prevented anthocyanin accumulation. Our results suggest that SmelMYBL1 may inhibits the MBW complex via the competition with MYB activators for bHLH binding site, although this hypothesis requires further elucidation.
Collapse
Affiliation(s)
- Moglia Andrea
- Department of Agricultural, Forest and Food Sciences, Plant Genetics and Breeding, University of Torino, Grugliasco (TO), Italy
| | - Elia Florio Francesco
- CREA, Research Centre for Genomics and Bioinformatics, Montanaso Lombardo (LO), Italy
| | - Iacopino Sergio
- PlantLab, Scuola Superiore Sant'Anna, Institute of Life Sciences, Ghezzano (PI), Italy
- Department of Biology, University of Pisa, Pisa (PI), Italy
| | - Guerrieri Alessandra
- Plant Hormone Biology Group, Swammerdam Institute for Life Sciences (SILS), University of Amsterdam, Amsterdam, The Netherlands
| | - Anna Milani Maria
- Department of Agricultural, Forest and Food Sciences, Plant Genetics and Breeding, University of Torino, Grugliasco (TO), Italy
| | - Comino Cinzia
- Department of Agricultural, Forest and Food Sciences, Plant Genetics and Breeding, University of Torino, Grugliasco (TO), Italy
| | - Barchi Lorenzo
- Department of Agricultural, Forest and Food Sciences, Plant Genetics and Breeding, University of Torino, Grugliasco (TO), Italy
| | - Marengo Arianna
- Department of Drug Science and Technology, University of Torino, Torino (TO), Italy
| | - Cagliero Cecilia
- Department of Drug Science and Technology, University of Torino, Torino (TO), Italy
| | - Rubiolo Patrizia
- Department of Drug Science and Technology, University of Torino, Torino (TO), Italy
| | - Toppino Laura
- CREA, Research Centre for Genomics and Bioinformatics, Montanaso Lombardo (LO), Italy
| | | | - Lanteri Sergio
- Department of Agricultural, Forest and Food Sciences, Plant Genetics and Breeding, University of Torino, Grugliasco (TO), Italy
| | - Bassolino Laura
- CREA, Research Centre for Genomics and Bioinformatics, Montanaso Lombardo (LO), Italy
- CREA, Research Centre for Cereal and Industrial Crops, Bologna, Italy
| |
Collapse
|
|
3
|
Abstract
Using pure tyrosine and phosphotyrosine we have recently shown that phosphotyrosine is unable to form peroxidase catalyzed dimers (1989, FEBS Lett. 255, 395-397). In the present report, the effect of phosphotyrosine residues within a protein structure on dityrosine formation was studied using casein as a model protein. Dephosphorylation of casein resulted in a dose and time dependent increased synthesis of dityrosines following treatment with peroxidase/H2O2. The extent of crosslink formation was inversely related to the amount of phosphorylated tyrosine residues as quantitated by immunoblotting. Thus, phosphorylation of tyrosine residues could play a regulatory role in protein-crosslinking where dityrosine bonds are involved.
Collapse
Affiliation(s)
- S Christian
- Institute of Medical Chemistry, University of Vienna, Austria
| | | | | | | |
Collapse
|