Linked Life Data

6101078

Source:http://linkedlifedata.com/resource/pubmed/id/6101078

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1990-3-14
pubmed:abstractText
Using two direct methods we have studied the binding locations and site sizes of distamycin and penta-N-methylpyrrolecarboxamide on three DNA restriction fragments from pBR322 plasmid. We find that methidiumpropyl-EDTA.Fe(II) footprinting and DNA affinity cleaving methods report common binding locations and site sizes for the tri- and pentapeptides bound to heterogeneous DNA. The tripeptide distamycin binds 5-base-pair sites with a preference for poly(dA).poly(dT) regions. The pentapeptide binds 6-7-base-pair sites with a preference for poly(dA).poly(dT) regions. These results are consistent with distamycin binding as an isogeometric helix to the minor groove of DNA with the four carboxamide N-H's hydrogen bonding five A + T base pairs. The data supports a model where each of the carboxamide N-H's can hydrogen bond to two bases, either O(2) of thymine or N(3) of adenine, located on adjacent base pairs on opposite strands of the helix. In most (but not all) cases the tri- and pentapeptide can adopt two orientations at each A + T rich binding site.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0739-1102
pubmed:author
pubmed:issnType
Print
pubmed:volume
1
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1133-47
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Distamycin and penta-N-methylpyrrolecarboxamide binding sites on native DNA. A comparison of methidiumpropyl-EDTA-Fe(II) footprinting and DNA affinity cleaving.
pubmed:affiliation
Laboratories of Chemistry, California Institute of Technology, Pasadena 91125.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't