Specific cleavage of kinetoplast minicircle DNA from Leishmania tarentolae by mung bean nuclease and identification of several additional minicircle sequence classes
نویسندگان
چکیده
Multiple sequence classes of kinetoplast minicircle DNA from Leishmania tarentolae were cleaved by mung bean nuclease in the presence of formamide, yielding unit length linear molecules which retained the anomalous electrophoretic mobility in acrylamide characteristic of minicircle DNA. No specific cleavage site sequence common to all minicircle sequence classes was apparent, although the main region of nuclease cleavage was localized approximately 350 bp from the unique SmaI restriction site of the conserved region found in all minicircle sequence classes. Covalent closure of the minicircle substrate was not a requirement for cleavage, as linearized network-derived or cloned minicircles were also cleaved by mung bean nuclease at similar locations. The partial sequences of several new minicircle sequence classes released from the network by mung bean nuclease are also reported.
منابع مشابه
Specific Deavage of Idnetoplast Minidrde Dna from Leishmania Tarentolae by Mung Bean Nudease and Identification of Several Additional Minidrde Sequence Classes
Multiple sequence classes of kinetoplast miniclrcle DNA from Le^iihmar^ia tarentolae were cleaved by mung bean nuclease In the presence of formamide, yielding unit length linear molecules which retained the anomalous electrophoretic mobility in acrylamide characteristic of minicircle DNA. No specific cleavage site sequence common to all minicircle sequence classes was apparent, although the mai...
متن کاملSequence heterogeneity and anomalous electrophoretic mobility of kinetoplast minicircle DNA from Leishmania tarentolae.
Several unit-length minicircles from the kinetoplast DNA of Leishmania tarentolae were cloned into pBR322 and into M13 phage vectors. The complete nucleotide sequences of three different partially homologous minicircles were obtained. The molecules contained a region of approx. 80% sequence homology extending for 160-270 bp and a region unique to each minicircle . A 14-mer was found to be conse...
متن کاملStructure of Leishmania Minicircle Kinetoplast DNA Classes
In a recent paper (5), Noyes et al. discussed a nested-PCRbased approach for identification and analysis of Leishmania kinetoplast DNA (kDNA) minicircle classes using the analysis of minicircle variable-region (VR) restriction profiles. The kDNA of trypanosomatids consists of catenated minicircle (approximately 5 3 10 to 5 3 10 per associate) and maxicircle (20 to 50 per associate) molecules (8...
متن کاملStructure of Leishmania Minicircle Kinetoplast DNA Classes
In a recent paper (5), Noyes et al. discussed a nested-PCRbased approach for identification and analysis of Leishmania kinetoplast DNA (kDNA) minicircle classes using the analysis of minicircle variable-region (VR) restriction profiles. The kDNA of trypanosomatids consists of catenated minicircle (approximately 5 3 10 to 5 3 10 per associate) and maxicircle (20 to 50 per associate) molecules (8...
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ورودعنوان ژورنال:
- Nucleic acids research
دوره 14 13 شماره
صفحات -
تاریخ انتشار 1986