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Quaternary structure of alpha-crystallin is necessary for the binding of unfolded proteins: A surface plasmon resonance study

2004    Avilov, SV; Aleksandrova, NA; Demchenko, AP

The interactions between an oligomeric heat-shock protein, alpha-crystallin, and its individual subunits with unfolded proteins were monitored by surface plasmon resonance. Immobilization at the sensor chip allowed us for the first time to study isolated alpha-crystallin subunits under physiological conditions. We observe that these subunits, in contrast to alpha-crystallin oligomers, do not bind unfolded protein. Our data indicate that quaternary structure of alpha-crystallin is necessary for its chaperone-like activity.