First Proteome Analysis of Poplar-Type Propolis

Area of Science:

• Biochemistry
• Proteomics
• Natural Products Chemistry

Background:

• Propolis, a natural mixture from honeybees and plants, is valued for its polyphenolic compounds and health benefits.
• It is utilized as a food supplement and functional food ingredient.
• Despite its use, the proteome of propolis, particularly poplar propolis, remained uncharacterized.

Purpose of the Study:

• To conduct the first comprehensive proteome analysis of poplar-type propolis.
• To identify and characterize the protein components within this complex natural matrix.
• To explore the potential for novel bioactive molecules in propolis.

Main Methods:

• Proteins were extracted from raw poplar propolis via cold acetone precipitation.
• Proteins were digested using trypsin.
• Peptide analysis was performed using nano-ESI-qTOF mass spectrometry with data-independent acquisition (DIA) and data-dependent acquisition (DDA).

Main Results:

• The proteome analysis successfully identified peptides and inferred proteins from poplar propolis.
• The identified proteins originate from both the honeybee (Apis) and poplar tree (Populus) genera.
• This analysis suggests the presence of previously unrecognized bioactive molecules within propolis.

Conclusions:

• This research provides the first-ever proteomic profile of any type of propolis.
• The poplar propolis proteome is a complex mixture of proteins from both insect and plant origins.
• The findings pave the way for further investigation into the functional roles and potential applications of these identified proteins.