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Investigating diversity in human plasma proteins.
Dobrin Nedelkov1, Urban A Kiernan, Eric E Niederkofler
1Intrinsic Bioprobes, Inc., Tempe, AZ 85281, USA. dnedelkov@intrinsicbio.com
Summary
This study reveals extensive genetic and protein diversity in human plasma. Researchers identified 76 protein variants, including posttranslational modifications and point mutations, in 25 proteins from 96 healthy individuals.
Area of Science:
- Proteomics
- Human genetics
- Biochemistry
Background:
- Plasma proteins are crucial components of the human proteome.
- Understanding protein variations is vital for disease diagnostics and biomarker discovery.
- Previous research lacked systematic characterization of individual protein structural modifications in the general population.
Purpose of the Study:
- To conduct a population proteomics study to define gene- and protein-level diversity in healthy individuals.
- To characterize the breadth of structural modifications in individual plasma proteins.
- To establish a foundational understanding of normal protein diversity for clinical applications.
Main Methods:
- Investigated 25 plasma proteins from a cohort of 96 healthy individuals.
- Utilized affinity-based mass spectrometric assays for protein analysis.
- Quantified and characterized structural forms and variants, including posttranslational modifications and point mutations.
Main Results:
- Identified a total of 76 structural forms/variants across the 25 investigated plasma proteins.
- Detected posttranslational modifications in 18 proteins and point mutations in 4 proteins.
- Observed a wide frequency range for these variations, from single samples to all 96.
Conclusions:
- The study demonstrates significant protein diversity within the human population.
- Findings provide a baseline for evaluating disease-related protein diversity in clinical proteomics.
- Results aid in the development of diagnostic biomarkers by understanding normal variation.