3b36
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| , resolution 1.50Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | , , , , , , , and | ||||||
| Ligands: | , | ||||||
| Gene: | PARK7 (Homo sapiens) | ||||||
| Related: | 2RK3, 2RK4, 2RK6
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Structure of M26L DJ-1
OverviewOverview
A number of missense mutations in the oxidative stress response protein DJ-1 are implicated in rare forms of familial Parkinsonism. The best-characterized Parkinsonian DJ-1 missense mutation, L166P, disrupts homodimerization and results in a poorly folded protein. The molecular basis by which the other Parkinsonism-associated mutations disrupt the function of DJ-1, however, is incompletely understood. In this study we show that three different Parkinsonism-associated DJ-1 missense mutations (A104T, E163K, and M26I) reduce the thermal stability of DJ-1 in solution by subtly perturbing the structure of DJ-1 without causing major folding defects or loss of dimerization. Atomic resolution X-ray crystallography shows that the A104T substitution introduces water and a discretely disordered residue into the core of the protein, E163K disrupts a key salt bridge with R145, and M26I causes packing defects in the core of the dimer. The deleterious effect of each Parkinsonism-associated mutation on DJ-1 is dissected by analysis of engineered substitutions (M26L, A104V, and E163K/R145E) that partially alleviate each of the defects introduced by the A104T, E163K and M26I mutations. In total, our results suggest that the protective function of DJ-1 can be compromised by diverse perturbations in its structural integrity, particularly near the junctions of secondary structural elements.
DiseaseDisease
Known disease associated with this structure: Amyotrophic lateral sclerosis-Parkinsonism/dementia complex 2 OMIM:[602533], Parkinson disease 7, autosomal recessive early-onset OMIM:[602533]
About this StructureAbout this Structure
3B36 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
ReferenceReference
Structural Impact of Three Parkinsonism-Associated Missense Mutations on Human DJ-1(,)., Lakshminarasimhan M, Maldonado MT, Zhou W, Fink AL, Wilson MA, Biochemistry. 2008 Feb 5;47(5):1381-92. Epub 2008 Jan 9. PMID:18181649
Page seeded by OCA on Mon Mar 31 05:22:40 2008