1. Revealing the Amylase Interactome in Whole Saliva Using Proteomic Approaches
- Author
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Karla Tonelli Bicalho Crosara, Maria Aparecida de Andrade Moreira Machado, Walter L. Siqueira, Eduardo Buozi Moffa, Yizhi Xiao, and David Zuanazzi
- Subjects
0301 basic medicine ,Adult ,Male ,Proteomics ,Saliva ,Article Subject ,Proteome ,lcsh:Medicine ,Interactome ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Affinity chromatography ,Humans ,Computer Simulation ,Amylase ,Protein Interaction Maps ,Sodium dodecyl sulfate ,Databases, Protein ,Gel electrophoresis ,General Immunology and Microbiology ,biology ,Chemistry ,lcsh:R ,030206 dentistry ,General Medicine ,030104 developmental biology ,Biochemistry ,Amylases ,biology.protein ,Female ,Digestion ,Function (biology) ,Research Article - Abstract
Understanding proteins present in saliva and their function when isolated is not enough to describe their real role in the mouth. Due to protein-protein interactions, structural changes may occur in macromolecules leading to functional modulation or modification. Besides amylase’s function in carbohydrate breakdown, amylase can delay proteolytic degradation of protein partners (e.g., histatin 1) when complexed. Due to its biochemical characteristics and high abundance in saliva, amylase probably interacts with several proteins acting as a biological carrier. This study focused on identifying interactions between amylase and other proteins found in whole saliva (WS) using proteomic approaches. Affinity chromatography was used, followed by gel electrophoresis methods, sodium dodecyl sulfate and native, tryptic in-solution and in-gel digestion, and mass spectrometry. We identified 66 proteins that interact with amylase in WS. Characterization of the identified proteins suggests that acidic (pI < 6.8) and low molecular weight (MW < 56 kDa) proteins have preference during amylase complex formation. Most of the identified proteins present biological functions related to host protection. A new protein-amylase network was constructed using the STRING database. Further studies are necessary to investigate individualities of the identified amylase interactors. These observations open avenues for more comprehensive studies on not yet fully characterized biological function of amylase.
- Published
- 2018