Publication Date:
2003-08-30
Description:
Lambda exonuclease processively degrades one strand of duplex DNA, moving 5'-to-3' in an ATP-independent fashion. When examined at the single-molecule level, the speeds of digestion were nearly constant at 4 nanometers per second (12 nucleotides per second), interspersed with pauses of variable duration. Long pauses, occurring at stereotypical locations, were strand-specific and sequence-dependent. Pause duration and probability varied widely. The strongest pause, GGCGAT TCT, was identified by gel electrophoresis. Correlating single-molecule dwell positions with sequence independently identified the motif GGCGA. This sequence is found in the left lambda cohesive end, where exonuclease inhibition may contribute to the reduced recombination efficiency at that end.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1539570/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1539570/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Perkins, Thomas T -- Dalal, Ravindra V -- Mitsis, Paul G -- Block, Steven M -- GM 57035/GM/NIGMS NIH HHS/ -- HG 011821-01/HG/NHGRI NIH HHS/ -- R01 GM057035/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2003 Sep 26;301(5641):1914-8. Epub 2003 Aug 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA. tperkins@jila.colorado.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12947034" target="_blank"〉PubMed〈/a〉
Keywords:
Bacteriophage lambda/enzymology
;
Base Pairing
;
*Base Sequence
;
Binding Sites
;
Consensus Sequence
;
DNA/*chemistry/*metabolism
;
Electrophoresis, Polyacrylamide Gel
;
Exodeoxyribonucleases/*metabolism
;
Hydrogen Bonding
;
Kinetics
;
Models, Chemical
;
Oligodeoxyribonucleotides/chemistry/metabolism
;
Polymerase Chain Reaction
;
Probability
;
Stochastic Processes
;
Time Factors
;
Viral Proteins
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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