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Baker JD, Shelton LB, Zheng D, Favretto F, Nordhues BA, Darling A, Sullivan LE, Sun Z, Solanki PK, Martin MD, Suntharalingam A, Sabbagh JJ, Becker S, Mandelkow E, Uversky VN, Zweckstetter M, Dickey CA, Koren J, Blair LJ. Human cyclophilin 40 unravels neurotoxic amyloids. PLoS Biol 2017; 15:e2001336. [PMID: 28654636 PMCID: PMC5486962 DOI: 10.1371/journal.pbio.2001336] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 05/23/2017] [Indexed: 01/13/2023] Open
Abstract
The accumulation of amyloidogenic proteins is a pathological hallmark of neurodegenerative disorders. The aberrant accumulation of the microtubule associating protein tau (MAPT, tau) into toxic oligomers and amyloid deposits is a primary pathology in tauopathies, the most common of which is Alzheimer's disease (AD). Intrinsically disordered proteins, like tau, are enriched with proline residues that regulate both secondary structure and aggregation propensity. The orientation of proline residues is regulated by cis/trans peptidyl-prolyl isomerases (PPIases). Here we show that cyclophilin 40 (CyP40), a PPIase, dissolves tau amyloids in vitro. Additionally, CyP40 ameliorated silver-positive and oligomeric tau species in a mouse model of tau accumulation, preserving neuronal health and cognition. Nuclear magnetic resonance (NMR) revealed that CyP40 interacts with tau at sites rich in proline residues. CyP40 was also able to interact with and disaggregate other aggregating proteins that contain prolines. Moreover, CyP40 lacking PPIase activity prevented its capacity for disaggregation in vitro. Finally, we describe a unique structural property of CyP40 that may permit disaggregation to occur in an energy-independent manner. This study identifies a novel human protein disaggregase and, for the first time, demonstrates its capacity to dissolve intracellular amyloids.
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Affiliation(s)
- Jeremy D. Baker
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Lindsey B. Shelton
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Dali Zheng
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Filippo Favretto
- German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Bryce A. Nordhues
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - April Darling
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Leia E. Sullivan
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Zheying Sun
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Parth K. Solanki
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Mackenzie D. Martin
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Amirthaa Suntharalingam
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Jonathan J. Sabbagh
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Stefan Becker
- Department for NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Eckhard Mandelkow
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
- CAESAR Research Center, Bonn, Germany
- MPI for Metabolism Research, Hamburg, Germany
| | - Vladimir N. Uversky
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
| | - Markus Zweckstetter
- German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
- Department for NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
- Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Chad A. Dickey
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - John Koren
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
| | - Laura J. Blair
- Department of Molecular Medicine and Byrd Alzheimer’s Institute, University of South Florida, Tampa, Florida, United States of America
- James A. Haley Veteran's Hospital, Tampa, Florida, United States of America
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Mukherjee MB, Tripathy V, Colah RB, Solanki PK, Ghosh K, Reddy BM, Mohanty D. Microsatellite diversity among the primitive tribes of India. Indian J Hum Genet 2009; 15:114-20. [PMID: 21088716 PMCID: PMC2922627 DOI: 10.4103/0971-6866.60187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
The present study was undertaken to determine the extent of diversity at 12 microsatellite short tandem repeat (STR) loci in seven primitive tribal populations of India with diverse linguistic and geographic backgrounds. DNA samples of 160 unrelated individuals were analyzed for 12 STR loci by multiplex polymerase chain reaction (PCR). Gene diversity analysis suggested that the average heterozygosity was uniformly high ( >0.7) in these groups and varied from 0.705 to 0.794. The Hardy-Weinberg equilibrium analysis revealed that these populations were in genetic equilibrium at almost all the loci. The overall GST value was high (GST = 0.051; range between 0.026 and 0.098 among the loci), reflecting the degree of differentiation/heterogeneity of seven populations studied for these loci. The cluster analysis and multidimensional scaling of genetic distances reveal two broad clusters of populations, besides Moolu Kurumba maintaining their distinct genetic identity vis-à-vis other populations. The genetic affinity for the three tribes of the Indo-European family could be explained based on geography and Language but not for the four Dravidian tribes as reflected by the NJT and MDS plots. For the overall data, the insignificant MANTEL correlations between genetic, linguistic and geographic distances suggest that the genetic variation among these tribes is not patterned along geographic and/or linguistic lines.
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Affiliation(s)
- Malay B Mukherjee
- Department of Hemato-Genetics, National Institute of Immunohaematology, 13 Floor, NMS Building, KEM Hospital Campus, Parel, Mumbai - 400 012, India
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