Linked Life Data

15642269

Source:http://linkedlifedata.com/resource/pubmed/id/15642269

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2005-1-11
pubmed:databankReference
pubmed:abstractText
DNA and RNA frequently form various branched intermediates that are important for the transmission of genetic information. Helicases play pivotal roles in the processing of these transient intermediates during nucleic acid metabolism. The archaeal Hef helicase/ nuclease is a representative protein that processes flap- or fork-DNA structures, and, intriguingly, its C-terminal half belongs to the XPF/Mus81 nuclease family. Here, we report the crystal structure of the helicase domain of the Hef protein from Pyrococcus furiosus. The structure reveals a novel helical insertion between the two conserved helicase core domains. This positively charged extra region, structurally similar to the "thumb" domain of DNA polymerase, plays critical roles in fork recognition. The Hef helicase/nuclease exhibits sequence similarity to the Mph1 helicase from Saccharomyces cerevisiae; XPF/Rad1, involved in DNA repair; and a putative Hef homolog identified in mammals. Hence, our findings provide a structural basis for the functional mechanisms of this helicase/nuclease family.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0969-2126
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
143-53
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:15642269-Adenosine Triphosphatases, pubmed-meshheading:15642269-Amino Acid Motifs, pubmed-meshheading:15642269-Amino Acid Sequence, pubmed-meshheading:15642269-Archaeal Proteins, pubmed-meshheading:15642269-Crystallography, X-Ray, pubmed-meshheading:15642269-DNA, pubmed-meshheading:15642269-DNA Helicases, pubmed-meshheading:15642269-DNA Mutational Analysis, pubmed-meshheading:15642269-DNA-Directed DNA Polymerase, pubmed-meshheading:15642269-Kinetics, pubmed-meshheading:15642269-Models, Molecular, pubmed-meshheading:15642269-Molecular Sequence Data, pubmed-meshheading:15642269-Phosphates, pubmed-meshheading:15642269-Protein Structure, Tertiary, pubmed-meshheading:15642269-Pyrococcus furiosus, pubmed-meshheading:15642269-Sequence Homology, Amino Acid, pubmed-meshheading:15642269-Spectrum Analysis, Raman
pubmed:year
2005
pubmed:articleTitle
Crystal structure and functional implications of Pyrococcus furiosus hef helicase domain involved in branched DNA processing.
pubmed:affiliation
Department of Structural Biology, Biomolecular Engineering Research Institute, 6-2-3 Furuedai, Suita, Osaka 565-0874, Japan.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't