Aggregation
Aggregation — The undesirable clumping of peptide molecules in solution, often caused by hydrophobic interactions, high concentration, or improper reconstitution technique.
What Is Peptide Aggregation?
Aggregation is the self-association of peptide molecules into multimeric assemblies ranging from soluble oligomers to insoluble precipitates. It is the primary physical degradation pathway for peptides and can reduce bioactivity, increase immunogenicity, and cause injection site reactions. Aggregation is driven by hydrophobic interactions, beta-sheet formation, and disulfide crosslinking.
Detection Methods
- SEC: Gold standard for quantifying soluble aggregates
- DLS: Measures hydrodynamic size distribution
- Turbidity (A340): Rapid screening for visible aggregates
- ThT fluorescence: Detects amyloid-like beta-sheet aggregates
Frequently Asked Questions
What is Aggregation?
The undesirable clumping of peptide molecules in solution, often caused by hydrophobic interactions, high concentration, or improper reconstitution technique.
Why is Aggregation important in peptide research?
Aggregation is a fundamental concept in degradation as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.