Journal Article

DZNE-2021-00659

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Proline/arginine dipeptide repeat polymers derail protein folding in amyotrophic lateral sclerosis.

Babu, M. (First author)DZNE* ; Favretto, F.DZNE* ; Ibanez de Opakua, A.DZNE* ; Rankovic, M.Extern* ; Becker, S. ; Zweckstetter, M. (Last author)DZNE*

2021
Nature Publishing Group UK [London]

This record in other databases:    

Please use a persistent id in citations: doi:10.1038/s41467-021-23691-y

Abstract: Amyotrophic lateral sclerosis and frontotemporal dementia are two neurodegenerative diseases with overlapping clinical features and the pathological hallmark of cytoplasmic deposits of misfolded proteins. The most frequent cause of familial forms of these diseases is a hexanucleotide repeat expansion in the non-coding region of the C9ORF72 gene that is translated into dipeptide repeat polymers. Here we show that proline/arginine repeat polymers derail protein folding by sequestering molecular chaperones. We demonstrate that proline/arginine repeat polymers inhibit the folding catalyst activity of PPIA, an abundant molecular chaperone and prolyl isomerase in the brain that is altered in amyotrophic lateral sclerosis. NMR spectroscopy reveals that proline/arginine repeat polymers bind to the active site of PPIA. X-ray crystallography determines the atomic structure of a proline/arginine repeat polymer in complex with the prolyl isomerase and defines the molecular basis for the specificity of disease-associated proline/arginine polymer interactions. The combined data establish a toxic mechanism that is specific for proline/arginine dipeptide repeat polymers and leads to derailed protein homeostasis in C9orf72-associated neurodegenerative diseases.

Keyword(s): Amyotrophic Lateral Sclerosis: genetics (MeSH) ; Amyotrophic Lateral Sclerosis: pathology (MeSH) ; Arginine: genetics (MeSH) ; Arginine: metabolism (MeSH) ; Biopolymers: metabolism (MeSH) ; Brain: pathology (MeSH) ; C9orf72 Protein: genetics (MeSH) ; Catalytic Domain (MeSH) ; Crystallography, X-Ray (MeSH) ; DNA Repeat Expansion (MeSH) ; Dipeptides: genetics (MeSH) ; Dipeptides: metabolism (MeSH) ; Frontotemporal Dementia: genetics (MeSH) ; Frontotemporal Dementia: pathology (MeSH) ; Humans (MeSH) ; Nuclear Magnetic Resonance, Biomolecular (MeSH) ; Peptidylprolyl Isomerase: isolation & purification (MeSH) ; Peptidylprolyl Isomerase: metabolism (MeSH) ; Peptidylprolyl Isomerase: ultrastructure (MeSH) ; Proline: genetics (MeSH) ; Proline: metabolism (MeSH) ; Protein Aggregates: genetics (MeSH) ; Protein Binding (MeSH) ; Protein Folding (MeSH) ; Recombinant Proteins: isolation & purification (MeSH) ; Recombinant Proteins: metabolism (MeSH) ; Recombinant Proteins: ultrastructure (MeSH) ; Repetitive Sequences, Amino Acid: genetics (MeSH) ; Biopolymers ; C9orf72 Protein ; C9orf72 protein, human ; Dipeptides ; Protein Aggregates ; Recombinant Proteins ; Arginine ; Proline ; PPIA protein, human ; Peptidylprolyl Isomerase

---

Contributing Institute(s):

1. Translational Structural Biology (AG Zweckstetter)

Research Program(s):

1. 352 - Disease Mechanisms (POF4-352) (POF4-352)

Appears in the scientific report 2021

---

Database coverage:
; ; ; ; Article Processing Charges ; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Essential Science Indicators ; Fees ; IF >= 15 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection ; Zoological Record

---