Linked Life Data

7923413

Source:http://linkedlifedata.com/resource/pubmed/id/7923413

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1994-10-26
pubmed:databankReference
pubmed:abstractText
Two linear DNA plasmids resembling the R1 and R2 plasmids that are present in the mitochondria of several South American strains of maize were found in mitochondria from a single source of Zea luxurians collected by L. Mazoti. The Mazoti mtDNA is closely related to mtDNAs of other Z. luxurians, but mitochondria derived from the other Z. luxurians sources lack the plasmids. The larger plasmid from Mazoti mitochondria, M1, was cloned and large portions of it were sequenced. Restriction mapping and sequence comparisons showed that approximately 4.9 kb is similar to the S1 plasmid of maize and an additional 2.6 kb is related to R1 sequences integrated into the main mitochondrial genome of N cytoplasm. Therefore, the M1 plasmid appears to be very similar to the R1 plasmid. The inverted repeats at the ends of the M1 plasmid are not identical. The left end IR is similar to the S-TIRs found at the termini of the S plasmids. The right end IR more closely resembles the integrated R1 sequences, including the "variant" region of the TIR. Whereas the variant region contains 13 bp in the S-TIRs and 15 bp in an integrated version of R1, it is 16 bp long in M1. The region of M1 that has no homology to the S1 plasmid is expressed at very low levels in Mazoti and RU cytoplasms, but at much higher levels in CMS-S mitochondria, where part of it is present in the main mitochondrial genome.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0172-8083
pubmed:author
pubmed:issnType
Print
pubmed:volume
25
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
258-64
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
R-type plasmids in mitochondria from a single source of Zea luxurians teosinte.
pubmed:affiliation
Division of Biological Sciences, University of Missouri, Columbia 65211.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.