A Conserved Motif Provides Binding Specificity to the PP2A-B56 Phosphatase
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A Conserved Motif Provides Binding Specificity to the PP2A-B56 Phosphatase. / Hertz, Emil Peter Thrane; Kruse, Thomas; Davey, Norman E; López-Méndez, Blanca; Sigurdsson, Jón Otti; Montoya, Guillermo; Olsen, Jesper V; Nilsson, Jakob.
In: Molecular Cell, Vol. 63, No. 4, 2016, p. 686-695.Research output: Contribution to journal › Journal article › peer-review
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TY - JOUR
T1 - A Conserved Motif Provides Binding Specificity to the PP2A-B56 Phosphatase
AU - Hertz, Emil Peter Thrane
AU - Kruse, Thomas
AU - Davey, Norman E
AU - López-Méndez, Blanca
AU - Sigurdsson, Jón Otti
AU - Montoya, Guillermo
AU - Olsen, Jesper V
AU - Nilsson, Jakob
N1 - Copyright © 2016 Elsevier Inc. All rights reserved.
PY - 2016
Y1 - 2016
N2 - Dynamic protein phosphorylation is a fundamental mechanism regulating biological processes in all organisms. Protein phosphatase 2A (PP2A) is the main source of phosphatase activity in the cell, but the molecular details of substrate recognition are unknown. Here, we report that a conserved surface-exposed pocket on PP2A regulatory B56 subunits binds to a consensus sequence on interacting proteins, which we term the LxxIxE motif. The composition of the motif modulates the affinity for B56, which in turn determines the phosphorylation status of associated substrates. Phosphorylation of amino acid residues within the motif increases B56 binding, allowing integration of kinase and phosphatase activity. We identify conserved LxxIxE motifs in essential proteins throughout the eukaryotic domain of life and in human viruses, suggesting that the motifs are required for basic cellular function. Our study provides a molecular description of PP2A binding specificity with broad implications for understanding signaling in eukaryotes.
AB - Dynamic protein phosphorylation is a fundamental mechanism regulating biological processes in all organisms. Protein phosphatase 2A (PP2A) is the main source of phosphatase activity in the cell, but the molecular details of substrate recognition are unknown. Here, we report that a conserved surface-exposed pocket on PP2A regulatory B56 subunits binds to a consensus sequence on interacting proteins, which we term the LxxIxE motif. The composition of the motif modulates the affinity for B56, which in turn determines the phosphorylation status of associated substrates. Phosphorylation of amino acid residues within the motif increases B56 binding, allowing integration of kinase and phosphatase activity. We identify conserved LxxIxE motifs in essential proteins throughout the eukaryotic domain of life and in human viruses, suggesting that the motifs are required for basic cellular function. Our study provides a molecular description of PP2A binding specificity with broad implications for understanding signaling in eukaryotes.
U2 - 10.1016/j.molcel.2016.06.024
DO - 10.1016/j.molcel.2016.06.024
M3 - Journal article
C2 - 27453045
VL - 63
SP - 686
EP - 695
JO - Molecular Cell
JF - Molecular Cell
SN - 1097-2765
IS - 4
ER -
ID: 164182539