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Amyloid β‐sheet mimic that antagonize protein aggregation and reduce amyloid toxicityPin‐Nan Cheng, Cong Liu, Minglei Zhao, David Eisenberg, and James Nowick

Presented by: Seth RitterNovember 13th, 2013

Amyloid Protein Aggregation Diseases

• Wide variety of diseases– Alzheimer’s, Parkinson’s, type II diabetes, etc

• Great variety of β‐sheet‐rich structures in associated proteins

• Energetically driven, aggregation process to form oligomers and fibres which are then toxic

Amyloid β‐Sheet Mimics (ABSMs)

ABSMs

Structure of ABSM 1r (Aβ30‐36)

Inhibiting Fibril Formation

• ABSMs designed to homotipically interact with varying sections of target proteins

• ABSMs conformationally bind best to  β‐sheet structure (specific step in fibril formation process)

Inhibiting Fibril Formation

Hβ2M Aggregation Inhibition

Aβ42 Aggregation Inhibition 

Aβ40 Aggregation Inhibition 

hαSyn1‐100 Aggregation Inhibition

Lag‐Time Comparisons

EM+A

BSM

Control

Aβ40 Aβ42 Hβ2M  hαSyn1‐100

Cell Survival

Cross Reactions of Aβ with ABSMs

Other Portions of Aβ40

Conclusion

• ABSMs provide platform to display heptapeptide β‐strands– Can be tailored to inhibit different amyloid proteins

– Can help elucidate fibrilization mechanisms

• Suggested potential therapeutic applications to detoxify amyloid aggregates