Article: Insights into Lou Gehrig's disease from the structure and instability of the A4V mutant of human Cu,Zn superoxide dismutase.
2002 Volume 324, Issue 2, Page(s) 247–256
Abstract: Mutations in human superoxide dismutase (HSOD) have been linked to the familial form of amyotrophic lateral sclerosis (FALS). Amyotrophic lateral sclerosis (ALS or Lou Gehrig's disease) is one of the most common neurodegenerative disorders in humans. In ... ...
| Abstract | Mutations in human superoxide dismutase (HSOD) have been linked to the familial form of amyotrophic lateral sclerosis (FALS). Amyotrophic lateral sclerosis (ALS or Lou Gehrig's disease) is one of the most common neurodegenerative disorders in humans. In ALS patients, selective killing of motor neurons leads to progressive paralysis and death within one to five years of onset. The most frequent FALS mutation in HSOD, Ala4-->Val, is associated with the most rapid disease progression. Here we identify and characterize key differences in the stability between the A4V mutant protein and its thermostable parent (HSOD-AS), in which free cysteine residues were mutated to eliminate interferences from cysteine oxidation. Denaturation studies reveal that A4V unfolds at a guanidine-HCl concentration 1M lower than HSOD-AS, revealing that A4V is significantly less stable than HSOD-AS. Determination and analysis of the crystallographic structures of A4V and HSOD-AS reveal structural features likely responsible for the loss of architectural stability of A4V observed in the denaturation experiments. The combined structural and biophysical results presented here argue that architectural destabilization of the HSOD protein may underlie the toxic function of the many HSOD FALS mutations. |
|---|---|
| MeSH term(s) | Amyotrophic Lateral Sclerosis/enzymology ; Amyotrophic Lateral Sclerosis/genetics ; Enzyme Stability ; Free Radicals ; Humans ; Kinetics ; Metals/chemistry ; Mutagenesis, Site-Directed ; Mutation ; Recombinant Proteins/genetics ; Recombinant Proteins/metabolism ; Superoxide Dismutase/chemistry ; Superoxide Dismutase/genetics ; Superoxide Dismutase/metabolism |
| Chemical Substances | Free Radicals ; Metals ; Recombinant Proteins ; Superoxide Dismutase (EC 1.15.1.1) |
| Language | English |
| Publishing date | 2002-10-03 |
| Publishing country | England |
| Document type | Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, U.S. Gov't, P.H.S. |
| ZDB-ID | 80229-3 |
| ISSN | 1089-8638 ; 0022-2836 |
| ISSN (online) | 1089-8638 |
| ISSN | 0022-2836 |
| DOI | 10.1016/s0022-2836(02)01090-2 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
Full text online
More links
Kategorien
In stock of ZB MED Cologne/Königswinter
| Zs.A 867: Show issues | Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG) |
Order via subito
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.