TY - JOUR

T1 - A mutational atlas for Parkin proteostasis

AU - Clausen, Lene

AU - Voutsinos, Vasileios

AU - Cagiada, Matteo

AU - Johansson, Kristoffer E.

AU - Grønbæk-Thygesen, Martin

AU - Nariya, Snehal

AU - Powell, Rachel L.

AU - Have, Magnus K.N.

AU - Oestergaard, Vibe H.

AU - Stein, Amelie

AU - Fowler, Douglas M.

AU - Lindorff-Larsen, Kresten

AU - Hartmann-Petersen, Rasmus

N1 - Publisher Copyright: © The Author(s) 2024.

PY - 2024

Y1 - 2024

N2 - Proteostasis can be disturbed by mutations affecting folding and stability of the encoded protein. An example is the ubiquitin ligase Parkin, where gene variants result in autosomal recessive Parkinsonism. To uncover the pathological mechanism and provide comprehensive genotype-phenotype information, variant abundance by massively parallel sequencing (VAMP-seq) is leveraged to quantify the abundance of Parkin variants in cultured human cells. The resulting mutational map, covering 9219 out of the 9300 possible single-site amino acid substitutions and nonsense Parkin variants, shows that most low abundance variants are proteasome targets and are located within the structured domains of the protein. Half of the known disease-linked variants are found at low abundance. Systematic mapping of degradation signals (degrons) reveals an exposed degron region proximal to the so-called “activation element”. This work provides examples of how missense variants may cause degradation either via destabilization of the native protein, or by introducing local signals for degradation.

AB - Proteostasis can be disturbed by mutations affecting folding and stability of the encoded protein. An example is the ubiquitin ligase Parkin, where gene variants result in autosomal recessive Parkinsonism. To uncover the pathological mechanism and provide comprehensive genotype-phenotype information, variant abundance by massively parallel sequencing (VAMP-seq) is leveraged to quantify the abundance of Parkin variants in cultured human cells. The resulting mutational map, covering 9219 out of the 9300 possible single-site amino acid substitutions and nonsense Parkin variants, shows that most low abundance variants are proteasome targets and are located within the structured domains of the protein. Half of the known disease-linked variants are found at low abundance. Systematic mapping of degradation signals (degrons) reveals an exposed degron region proximal to the so-called “activation element”. This work provides examples of how missense variants may cause degradation either via destabilization of the native protein, or by introducing local signals for degradation.

U2 - 10.1038/s41467-024-45829-4

DO - 10.1038/s41467-024-45829-4

M3 - Journal article

C2 - 38378758

AN - SCOPUS:85185529267

VL - 15

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

M1 - 1541

ER -