β‐sheet mimic that antagonize protein aggregation and ... · 116-122 305-311 ha syn69_75 ha...

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Amyloid β‐sheet mimic that antagonize protein aggregation and reduce amyloid toxicity PinNan Cheng, Cong Liu, Minglei Zhao, David Eisenberg, and James Nowick Presented by: Seth Ritter November 13 th , 2013

Transcript of β‐sheet mimic that antagonize protein aggregation and ... · 116-122 305-311 ha syn69_75 ha...

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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

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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

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Amyloid β‐Sheet Mimics (ABSMs)

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ABSMs

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Structure of ABSM 1r (Aβ30‐36)

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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)

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Inhibiting Fibril Formation

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Hβ2M Aggregation Inhibition

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Aβ42 Aggregation Inhibition 

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Aβ40 Aggregation Inhibition 

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hαSyn1‐100 Aggregation Inhibition

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Lag‐Time Comparisons

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EM+A

BSM

Control

Aβ40 Aβ42 Hβ2M  hαSyn1‐100

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Cell Survival

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Cross Reactions of Aβ with ABSMs

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Other Portions of Aβ40

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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