scholarly journals Linear mitochondrial deoxyribonucleic acid from the yeast Hansenula mrakii.

1981 ◽  
Vol 1 (5) ◽  
pp. 387-393 ◽  
Author(s):  
M Wesolowski ◽  
H Fukuhara
Keyword(s):  
Deoxyribonucleic Acid ◽  
Yeast Species ◽  
Restriction Analysis ◽  
Restriction Enzymes ◽  
Specific Gene ◽  
Restriction Map ◽  
Base Pairs ◽  
Linear Restriction ◽  
Gene Map ◽  
Petite Negative Yeast

The mitochondrial deoxyribonucleic acid (mtDNA) from a petite-negative yeast, Hansenula mrakii, was studied. A linear restriction map was constructed with 11 restriction enzymes. The linearity of the genome was confirmed by direct end labeling of the molecule, followed by restriction analysis. The molecular weight of the DNA was found to be 55,000 base pairs. This is the first linear mtDNA found in yeast species. Using specific gene probes obtained from Saccharomyces cerevisiae mtDNA, we have constructed a gene map of H. mrakii mtDNA. The arrangement of genes in this linear genome was very different from the circular mtDNA of other known yeasts.

Linear mitochondrial deoxyribonucleic acid from the yeast Hansenula mrakii

1981 ◽  
Vol 1 (5) ◽  
pp. 387-393
Author(s):  
M Wesolowski ◽  
H Fukuhara
Keyword(s):  
Deoxyribonucleic Acid ◽  
Yeast Species ◽  
Restriction Analysis ◽  
Restriction Enzymes ◽  
Specific Gene ◽  
Restriction Map ◽  
Base Pairs ◽  
Linear Restriction ◽  
Gene Map ◽  
Petite Negative Yeast

The mitochondrial deoxyribonucleic acid (mtDNA) from a petite-negative yeast, Hansenula mrakii, was studied. A linear restriction map was constructed with 11 restriction enzymes. The linearity of the genome was confirmed by direct end labeling of the molecule, followed by restriction analysis. The molecular weight of the DNA was found to be 55,000 base pairs. This is the first linear mtDNA found in yeast species. Using specific gene probes obtained from Saccharomyces cerevisiae mtDNA, we have constructed a gene map of H. mrakii mtDNA. The arrangement of genes in this linear genome was very different from the circular mtDNA of other known yeasts.

Detection of the Glanzmann's Thrombasthenia Mutations in Arab and Iraqi-Jewish Patients by Polymerase Chain Reaction and Restriction Analysis of Blood or Urine Samples

1991 ◽  
Vol 66 (04) ◽  
pp. 500-504 ◽  
Author(s):  
H Peretz ◽  
U Seligsohn ◽  
E Zwang ◽  
B S Coller ◽  
P J Newman
Keyword(s):  
Polymerase Chain Reaction ◽  
Base Pair ◽  
Restriction Analysis ◽  
Urine Samples ◽  
Chain Reaction ◽  
Base Pairs ◽  
Glanzmann’S Thrombasthenia ◽  
Glanzmann's Thrombasthenia ◽  
Base Pair Deletion ◽  
Polymerase Chain

SummarySevere Glanzmann's thrombasthenia is relatively frequent in Iraqi-Jews and Arabs residing in Israel. We have recently described the mutations responsible for the disease in Iraqi-Jews – an 11 base pair deletion in exon 12 of the glycoprotein IIIa gene, and in Arabs – a 13 base pair deletion at the AG acceptor splice site of exon 4 on the glycoprotein IIb gene. In this communication we show that the Iraqi-Jewish mutation can be identified directly by polymerase chain reaction and gel electrophoresis. With specially designed oligonucleotide primers encompassing the mutation site, an 80 base pair segment amplified in healthy controls was clearly distinguished from the 69 base pair segment produced in patients. Patients from 11 unrelated Iraqi-Jewish families had the same mutation. The Arab mutation was identified by first amplifying a DNA segment consisting of 312 base pairs in controls and of 299 base pairs in patients, and then digestion by a restriction enzyme Stu-1, which recognizes a site that is absent in the mutant gene. In controls the 312 bp segment was digested into 235 and 77 bp fragments, while in patients there was no change in the size of the amplified 299 bp segment. The mutation was found in patients from 3 out of 5 unrelated Arab families. Both Iraqi-Jewish and Arab mutations were detectable in DNA extracted from blood and urine samples. The described simple methods of identifying the mutations should be useful for detection of the numerous potential carriers among the affected kindreds and for prenatal diagnosis using DNA extracted from chorionic villi samples.

Evolution of the chloroplast genome and polymorphic ITS regions in Allium subg. Melanocrommyum

Genome ◽  
1999 ◽  
Vol 42 (2) ◽  
pp. 237-247 ◽  
Author(s):  
Ted HM Mes ◽  
Reinhard M Fritsch ◽  
Sven Pollner ◽  
Konrad Bachmann
Keyword(s):  
Concerted Evolution ◽  
Morphological Evolution ◽  
Restriction Analysis ◽  
Nuclear Genome ◽  
Restriction Enzymes ◽  
Border Region ◽  
Chloroplast Genomes ◽  
Central Asian ◽  
Its Regions ◽  
Chloroplast Haplotypes

Relationships based on PCR-RFLPs of non-coding regions of cpDNA indicate that some of the largest subgenera of the genus Allium and five of the largest sections of the Central Asian subg. Melanocrommyum are artificial. Internested synapomorphic mutations without homoplasy were found only in the chloroplast genomes of plants of subg. Melanocrommyum that occur in the border region of Tajikistan, Uzbekistan, Afghanistan, and Kyrgyzstan. Eighteen of 49 plants surveyed were polymorphic for their ITS regions. Even plants that had identical chloroplast genomes were polymorphic for nuclear ribosomal regions. These individuals had markedly different frequencies of ITS variants that were detected with various restriction enzymes. The geographic partitioning of chloroplast haplotypes and the fact that the ITS variants could not be ordered hierarchically can readily be envisioned to result from gene flow. Processes such as concerted evolution and parallel morphological evolution may also be partly responsible for the disconcordance of mutations in the chloroplast and nuclear genome. However, the chimeric nature of the nuclear ribosomal regions indicates that concerted evolution is not the dominating process in Allium subg. Melanocrommyum.Key words: polymorphic, phylogeny, restriction analysis.

MOLECULAR DEFECTS OF THE FACTOR IX GENE CAUSING SEVERE HAEMOPHILIA

1987 ◽  
Author(s):  
B M Ludwig ◽  
R Schwaab ◽  
H H Brackmann ◽  
H Egli ◽  
K Olek
Keyword(s):  
Restriction Analysis ◽  
Cdna Probe ◽  
Restriction Enzymes ◽  
Factor Ix ◽  
Functional Abnormality ◽  
Gene Deletions ◽  
Structural Alterations ◽  
Haemophilia B ◽  
Molecular Defects ◽  
Precise Data

Deficiency or functional abnormality of factor IX protein leads to the X-linked recessive haemorrhagic disorder known as haemophilia B. Using the factor IX cDNA probe pTG 397 we have studied DNA purified from 40 patients afflicted with haemophilia B. Restriction analysis was carried out using Eco RI, Taq I and Xmn I which give result to DNA fragments representing 99 % of the whole factor IX gene. Mapping the gene this way four patients were shown to have structural alterations in the factor IX gene. To obtain more precise data concerning these mutations we additionally used restriction enzymes Bgl II and Hind III.The results listed below indicate more patients have to be examined to conclude a strong correlation between inhibitors to factor IX and the presence of gross gene deletions. This view is supported by the findings that two further inhibitor forming patients had no sizable deletions.

Construction of a new shuttle vector for Lactobacillus

1992 ◽  
Vol 38 (1) ◽  
pp. 69-74 ◽  
Author(s):  
P. Chagnaud ◽  
C. K. N. Chan Kwo Chion ◽  
R. Duran ◽  
P. Naouri ◽  
A. Arnaud ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Selection Pressure ◽  
Shuttle Vector ◽  
Restriction Enzymes ◽  
Lactobacillus Bulgaricus ◽  
Restriction Map ◽  
Enzyme Gene ◽  
Shuttle Plasmid ◽  
Malolactic Enzyme ◽  
Mrs Medium

To clone the malolactic enzyme gene from Lactobacillus sp. 89, construction of a shuttle vector able to express itself in Lactobacillus sp. 89 and Escherichia coli was undertaken. The shuttle plasmid pLE16 resulted from the union of pBR328 and of the pLB10 plasmid extracted from Lactobacillus bulgaricus 10. The bacterial transformation in Lactobacillus sp. 89 was performed by electroporation, and the clones were selected on MRS medium with 30 μg∙mL−1 chloramphenicol added. Fifty percent of the clones from Lactobacillus sp. 89 lost their resistance to chloramphenicol following 28 generations when the selection pressure was not maintained. The restriction map of pLE16 (7600 bp) was established using several restriction enzymes. Key words: malolactic enzyme, shuttle plasmid, Escherichia coli, Lactobacillus, electroporation.

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