1n19

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{{STRUCTURE_1n19| PDB=1n19 | SCENE= }}
{{STRUCTURE_1n19| PDB=1n19 | SCENE= }}
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'''Structure of the HSOD A4V mutant'''
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===Structure of the HSOD A4V mutant===
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==Overview==
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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--&gt;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.
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(as it appears on PubMed at http://www.pubmed.gov), where 12441104 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12441104}}
==About this Structure==
==About this Structure==
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[[Category: Thayer, M M.]]
[[Category: Thayer, M M.]]
[[Category: Greek key beta-barrel]]
[[Category: Greek key beta-barrel]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 13:00:34 2008''

Revision as of 10:00, 28 July 2008

Image:1n19.png

Template:STRUCTURE 1n19

Structure of the HSOD A4V mutant

Template:ABSTRACT PUBMED 12441104

About this Structure

1N19 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Insights into Lou Gehrig's disease from the structure and instability of the A4V mutant of human Cu,Zn superoxide dismutase., Cardoso RM, Thayer MM, DiDonato M, Lo TP, Bruns CK, Getzoff ED, Tainer JA, J Mol Biol. 2002 Nov 22;324(2):247-56. PMID:12441104

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