Creating a 'Molecular Band-Aid'; Blocking an Exposed Protease Target Site in Desmoplakin.
Creating a 'Molecular Band-Aid'; Blocking an Exposed Protease Target Site in Desmoplakin.
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DOI:
10.3390/jpm11050401
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发表时间:
2021-05-12
影响因子:
--
通讯作者:
Wright NT
中科院分区:
文献类型:
--
作者:
Hoover CA;Ott KL;Manring HR;Dew T;Borzok MA;Wright NT
Desmoplakin (DSP) is a large (~260 kDa) protein found in the desmosome, a subcellular complex that links the cytoskeleton of one cell to its neighbor. A mutation ‘hot-spot’ within the NH2-terminal third of the DSP protein (specifically, residues 299–515) is associated with both cardiomyopathies and skin defects. In select DSP variants, disease is linked specifically to the uncovering of a previously-occluded calpain target site (residues 447–451). Here, we partially stabilize these calpain-sensitive DSP clinical variants through the addition of a secondary single point mutation—tyrosine for leucine at amino acid position 518 (L518Y). Molecular dynamic (MD) simulations and enzymatic assays reveal that this stabilizing mutation partially blocks access to the calpain target site, resulting in restored DSP protein levels. This ‘molecular band-aid’ provides a novel way to maintain DSP protein levels, which may lead to new strategies for treating this subset of DSP-related disorders.
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39.3
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通讯作者:
Calkins H
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39.3
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Rampazzo, Alessandra
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Campbell, Stuart G.
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39.3
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通讯作者:
Nava, A
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4.8
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Ono, Y;Shimada, H;Suzuki, K
通讯作者:
Suzuki, K