PDBsum entry 2rk6

Go to PDB code: 
Top Page protein links
Chaperone PDB id
Protein chain
186 a.a.
Waters ×190

References listed in PDB file
Key reference
Title Structural impact of three parkinsonism-Associated missense mutations on human dj-1(,).
Authors M.Lakshminarasimhan, M.T.Maldonado, W.Zhou, A.L.Fink, M.A.Wilson.
Ref. Biochemistry, 2008, 47, 1381-1392.
PubMed id 18181649
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.
Go to PROCHECK summary