Linked Life Data

9478970

Source:http://linkedlifedata.com/resource/pubmed/id/9478970

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1998-3-25
pubmed:abstractText
DnaA protein, the initiator protein of E. coli chromosomal replication, can be rejuvenated from an inactive ADP form to active ATP-DnaA protein by acidic phospholipids in a fluid bilayer. Cross-linking studies with the photoactivable phospholipid analog 1-O-hexadecanoyl-2-O-[9-[[[2-[125I]iodo-4-(trifluoromethyl-3H- diazirin -3-yl)benzyl]oxy]carbonyl]nonanoyl]-sn-glycero-3-phosphocholine reveal insertion of DnaA protein into the hydrophobic region of the bilayer; this insertion is accompanied by membrane-mediated dissociation of the tightly bound allosteric nucleotides ADP and ATP. Photolabeling of DnaA protein occurred with membrane properties that resembled those needed for reactivation of ADP-DnaA protein; efficient labeling of DnaA protein was observed only when the lipid analog was incorporated into anionic vesicles and the temperature during treatment was above the gel to liquid crystalline phase transition. Predominant hydrophobic photolabeling was localized within a single region of DnaA protein, a region that contains putative amphipathic helices and has been shown to contain information essential for functional interaction with membranes.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
27
pubmed:volume
273
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5167-73
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed-meshheading:9478970-Adenine Nucleotides, pubmed-meshheading:9478970-Adenosine Diphosphate, pubmed-meshheading:9478970-Adenosine Triphosphate, pubmed-meshheading:9478970-Allosteric Regulation, pubmed-meshheading:9478970-Bacterial Proteins, pubmed-meshheading:9478970-Cross-Linking Reagents, pubmed-meshheading:9478970-DNA, Bacterial, pubmed-meshheading:9478970-DNA Replication, pubmed-meshheading:9478970-DNA-Binding Proteins, pubmed-meshheading:9478970-Escherichia coli, pubmed-meshheading:9478970-Lipid Bilayers, pubmed-meshheading:9478970-Membrane Fluidity, pubmed-meshheading:9478970-Peptide Mapping, pubmed-meshheading:9478970-Phospholipids, pubmed-meshheading:9478970-Photoaffinity Labels, pubmed-meshheading:9478970-Protein Binding, pubmed-meshheading:9478970-Protein Structure, Secondary
pubmed:year
1998
pubmed:articleTitle
Membrane-mediated release of nucleotide from an initiator of chromosomal replication, Escherichia coli DnaA, occurs with insertion of a distinct region of the protein into the lipid bilayer.
pubmed:affiliation
Department of Biochemistry and Molecular Biology, Georgetown University Medical Center, Washington, DC 20007, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't