Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2008-7-1
pubmed:abstractText
Activating mutations in the pore-forming Kir6.2 (KCNJ11) and regulatory sulphonylurea receptor SUR1 (ABCC8) subunits of the K(ATP) channel are a common cause of transient neonatal diabetes mellitus (TNDM). We identified a new TNDM mutation (R826W) in the first nucleotide-binding domain (NBD1) of SUR1. The mutation was found in a region that heterodimerizes with NBD2 to form catalytic site 2. Functional analysis showed that this mutation decreases MgATP hydrolysis by purified maltose-binding protein MBP-NBD1 fusion proteins. Inhibition of ATP hydrolysis by MgADP or BeF was not changed. The results indicate that the ATPase cycle lingers in the post-hydrolytic MgADP.P(i)-bound state, which is associated with channel activation. The extent of MgADP-dependent activation of K(ATP) channel activity was unaffected by the R826W mutation, but the time course of deactivation was slowed. Channel inhibition by MgATP was reduced, leading to an increase in resting whole-cell currents. In pancreatic beta cells, this would lead to less insulin secretion and thereby diabetes.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-11395395, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-11502255, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-15034580, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-15893323, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-16123337, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-16858415, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-16885550, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-16971936, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-17446535, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-17485460, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-17561960, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-17652156, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-17723295, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-18025464, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-4202581, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-8650576, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-9144288, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-9382893, http://linkedlifedata.com/resource/pubmed/commentcorrection/18497752-9618560
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1469-3178
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
9
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
648-54
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed-meshheading:18497752-ATP-Binding Cassette Transporters, pubmed-meshheading:18497752-Adenosine Diphosphate, pubmed-meshheading:18497752-Adenosine Triphosphatases, pubmed-meshheading:18497752-Adenosine Triphosphate, pubmed-meshheading:18497752-Amino Acid Sequence, pubmed-meshheading:18497752-Amino Acid Substitution, pubmed-meshheading:18497752-Arginine, pubmed-meshheading:18497752-Child, pubmed-meshheading:18497752-Diabetes Mellitus, pubmed-meshheading:18497752-Humans, pubmed-meshheading:18497752-Infant, Newborn, pubmed-meshheading:18497752-Infant, Newborn, Diseases, pubmed-meshheading:18497752-Ion Channel Gating, pubmed-meshheading:18497752-Kinetics, pubmed-meshheading:18497752-Male, pubmed-meshheading:18497752-Molecular Sequence Data, pubmed-meshheading:18497752-Mutant Proteins, pubmed-meshheading:18497752-Mutation, pubmed-meshheading:18497752-Potassium Channels, Inwardly Rectifying, pubmed-meshheading:18497752-Protein Structure, Secondary, pubmed-meshheading:18497752-Protein Structure, Tertiary, pubmed-meshheading:18497752-Receptors, Drug, pubmed-meshheading:18497752-Tryptophan
pubmed:year
2008
pubmed:articleTitle
A mutation (R826W) in nucleotide-binding domain 1 of ABCC8 reduces ATPase activity and causes transient neonatal diabetes.
pubmed:affiliation
Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3PT, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't