INT159248
From wiki-pain
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Sentences Mentioned In
Key: | Protein | Mutation | Event | Anatomy | Negation | Speculation | Pain term | Disease term |
We therefore examined the effect of the W232A mutation and the requirement for the SH3 domain on pyrin's recruitment to and reticularization of PSTPIP1 filaments. | |||||||||||||||
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Mutant PSTPIP1, by virtue of its increased binding affinity for pyrin, may be somewhat more readily recruited to ASC specks than is wild type PSTPIP1, placing mutant PSTPIP1 more frequently in the inflammasome compartment. | |||||||||||||||
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In contrast, the W232A mutation in PSTPIP1 abolished pyrin binding; consequently, PSTPIP1 filaments were primarily straight, not extensively branched (Figure 4IK), confirming that the reticularization of PSTPIP1 filaments is a direct consequence of pyrin binding. | |||||||||||||||
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Patients with FMF are considered to have an increased risk of sacroiliitis, while the association of such abnormalities with FMF has not been accepted uniformly. | |||||||||||||||
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Since disease-associated mutations in PSTPIP1 enhance pyrin binding, PAPA syndrome and FMF are thought to share a common pathoetiology. | |||||||||||||||
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We also examine the pyrin/PSTPIP1 interaction and show that contrary to earlier predictions [5], the PSTPIP1 SH3 domain is not required for its interaction with pyrin. | |||||||||||||||
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This region might also be a PEST phosphatase interaction surface, since pyrin and PEST phosphatase are thought to bind to the same region of PSTPIP1 and the PAPA mutations increase affinity for pyrin while decreasing affinity for PEST phophatases [5]. | |||||||||||||||
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First, our studies show clearly that the SH3 domain of PSTPIP1 is not required for pyrin binding nor is it necessary for pyrin-mediated reticularization of PSTPIP1 filaments. | |||||||||||||||
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General Comments
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