Gapped Minicircles. A novel replication intermediate of kinetoplast DNA.
نویسندگان
چکیده
منابع مشابه
The attachment of minicircles to kinetoplast DNA networks during replication.
Kinetoplast DNA (kDNA), the trypanosomatid mitochondrial DNA, is a network containing several thousand interlocked minicircles. During kDNA synthesis, minicircles dissociate from the network, and after replication their progeny reattach to the network periphery. Using electron microscopy autoradiography, we found that newly synthesized 3H-labeled minicircles, after short labeling periods, are c...
متن کاملEnzymatic mechanism controls redox-mediated protein-DNA interactions at the replication origin of kinetoplast DNA minicircles.
Kinetoplast DNA (kDNA) is the mitochondrial DNA of trypanosomatids. Its major components are several thousand topologically interlocked DNA minicircles. Their replication origins are recognized by universal minicircle sequence-binding protein (UMSBP), a CCHC-type zinc finger protein, which has been implicated with minicircle replication initiation and kDNA segregation. Interactions of UMSBP wit...
متن کاملSequences of two kinetoplast DNA minicircles of Tryptanosoma brucei.
Kinetoplast DNA of Trypanosoma brucei is composed of a network of about 10,000 interlocked minicircle DNA molecules (1.0 kilobase) that are catenated with about 50 maxicircle DNA molecules (23 kilobases). Several different DNA . DNA hybridization techniques using individual minicircle DNA sequences cloned in Escherichia coli have indicated that each minicircle molecule contains about one-fourth...
متن کاملKinetoplast DNA Replication
The order Kinetoplastida is composed of several families of flagellated protozoa which are among the most ancient of the eukaryotes. The most prominent members of this order are parasites that are responsible for major tropical diseases. These parasites include Trypanosoma brucei, the African trypanosome; Trypanosoma cruzi, the South American trypanosome; and several species of Leishmania. Othe...
متن کاملGenomic organization of Trypanosoma brucei kinetoplast DNA minicircles.
The sequences of seven new Trypanosoma brucei kinetoplast DNA minicircles were obtained. A detailed comparative analysis of these sequences and those of the 18 complete kDNA minicircle sequences from T. brucei available in the database was performed. These 25 different minicircles contain 86 putative gRNA genes. The number of gRNA genes per minicircle varies from 2 to 5. In most cases, the gene...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1984
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(17)42581-6