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1994
Baranowski W., Dirheimer G., Jakowicki J. A., Keith G.
Deficiency of queuine, a highly modified purine base, in transfer RNAs from primary and metastatic ovarian malignant tumors in women Article de journal
Dans: Cancer Res, vol. 54, no. 16, p. 4468-71, 1994, (0008-5472 Journal Article).
Résumé | BibTeX | Étiquettes: &, Adolescent, Adult, Aged, derivatives/analysis, Female, Gov't, Guanine/*analogs, Human, Middle, Neoplasm/*chemistry, Neoplasms/*chemistry/pathology, Non-U.S., Ovarian, RNA, Support, Transfer/*chemistry
@article{,
title = {Deficiency of queuine, a highly modified purine base, in transfer RNAs from primary and metastatic ovarian malignant tumors in women},
author = { W. Baranowski and G. Dirheimer and J. A. Jakowicki and G. Keith},
year = {1994},
date = {1994-01-01},
journal = {Cancer Res},
volume = {54},
number = {16},
pages = {4468-71},
abstract = {The tRNAs from rapidly growing tissues, particularly from neoplasia, often exhibit queuine deficiency. In order to check whether different kinds of ovarian tumors display queuine deficiencies we have analyzed tRNA samples from 16 ovarian malignancies. The tRNAs from histologically normal myometrium (4 samples) and myoma (6 samples) were taken as healthy tissue and benign tumor references. Queuine deficiency was determined by an exchange assay using [8-3H]guanine and tRNA:guanine transglycosylase from Escherichia coli. The mean values of queuine deficiencies in tRNAs were: 10.95 +/- 2.21 (SD) pmol/A260 in gonadal and germ cell tumors (5 cases); 23.75 +/- 7.89 pmol/A260 in primary epithelial tumors (9 cases); and 34.58 +/- 7.18 pmol/A260 in metastatic tumors (2 cases). These values displayed statistically significant differences (P = 0.0003, Kruskal-Wallis test). The queuine deficiencies in tRNAs significantly increased when moving from well-differentiated through moderately differentiated to poorly differentiated tumors, with the highest values found in poorly differentiated metastatic tumors (P = 0.0002, Kruskal-Wallis test). Queuine deficiency determination in tRNAs is proposed as a factor for clinical outcome prognosis of ovarian malignancies.},
note = {0008-5472
Journal Article},
keywords = {&, Adolescent, Adult, Aged, derivatives/analysis, Female, Gov't, Guanine/*analogs, Human, Middle, Neoplasm/*chemistry, Neoplasms/*chemistry/pathology, Non-U.S., Ovarian, RNA, Support, Transfer/*chemistry},
pubstate = {published},
tppubtype = {article}
}
The tRNAs from rapidly growing tissues, particularly from neoplasia, often exhibit queuine deficiency. In order to check whether different kinds of ovarian tumors display queuine deficiencies we have analyzed tRNA samples from 16 ovarian malignancies. The tRNAs from histologically normal myometrium (4 samples) and myoma (6 samples) were taken as healthy tissue and benign tumor references. Queuine deficiency was determined by an exchange assay using [8-3H]guanine and tRNA:guanine transglycosylase from Escherichia coli. The mean values of queuine deficiencies in tRNAs were: 10.95 +/- 2.21 (SD) pmol/A260 in gonadal and germ cell tumors (5 cases); 23.75 +/- 7.89 pmol/A260 in primary epithelial tumors (9 cases); and 34.58 +/- 7.18 pmol/A260 in metastatic tumors (2 cases). These values displayed statistically significant differences (P = 0.0003, Kruskal-Wallis test). The queuine deficiencies in tRNAs significantly increased when moving from well-differentiated through moderately differentiated to poorly differentiated tumors, with the highest values found in poorly differentiated metastatic tumors (P = 0.0002, Kruskal-Wallis test). Queuine deficiency determination in tRNAs is proposed as a factor for clinical outcome prognosis of ovarian malignancies.
Heyman T., Agoutin B., Fix C., Dirheimer G., Keith G.
Yeast serine isoacceptor tRNAs: variations of their content as a function of growth conditions and primary structure of the minor tRNA(Ser)GCU Article de journal
Dans: FEBS Lett, vol. 347, no. 2-3, p. 143-6, 1994, (0014-5793 Journal Article).
Résumé | BibTeX | Étiquettes: &, Acid, Anticodon, Base, cerevisiae/*genetics/*growth, Conformation, Culture, Data, development, Fungal/*chemistry, Galactose, Hybridization, Media, Molecular, Nucleic, Probes, RNA, Saccharomyces, Sequence, Ser/analysis/*chemistry, Transfer, Transfer/*chemistry
@article{,
title = {Yeast serine isoacceptor tRNAs: variations of their content as a function of growth conditions and primary structure of the minor tRNA(Ser)GCU},
author = { T. Heyman and B. Agoutin and C. Fix and G. Dirheimer and G. Keith},
year = {1994},
date = {1994-01-01},
journal = {FEBS Lett},
volume = {347},
number = {2-3},
pages = {143-6},
abstract = {The primary structure of Saccharomyces cerevisiae tRNA(Ser)GCU is presented (EMBL database accession No. X74268 S. cerevisiae tRNA-Ser). In addition, quantitation of the relative amounts of serine isoaccepting tRNAs in yeast grown on different media showed that the minor tRNA(Ser)GCU decreased while the major tRNA(Ser)AGA increased as the growth rate and the cellular protein content increased. The minor species, tRNA(Ser)CGA and tRNA(Ser)UGA, were not separated by our gel system, however, taken together they appeared to vary in the same way as tRNA(Ser)GCU. These data suggest a growth rate dependence of yeast tRNAs similar to that previously described for E. coli tRNAs.},
note = {0014-5793
Journal Article},
keywords = {&, Acid, Anticodon, Base, cerevisiae/*genetics/*growth, Conformation, Culture, Data, development, Fungal/*chemistry, Galactose, Hybridization, Media, Molecular, Nucleic, Probes, RNA, Saccharomyces, Sequence, Ser/analysis/*chemistry, Transfer, Transfer/*chemistry},
pubstate = {published},
tppubtype = {article}
}
The primary structure of Saccharomyces cerevisiae tRNA(Ser)GCU is presented (EMBL database accession No. X74268 S. cerevisiae tRNA-Ser). In addition, quantitation of the relative amounts of serine isoaccepting tRNAs in yeast grown on different media showed that the minor tRNA(Ser)GCU decreased while the major tRNA(Ser)AGA increased as the growth rate and the cellular protein content increased. The minor species, tRNA(Ser)CGA and tRNA(Ser)UGA, were not separated by our gel system, however, taken together they appeared to vary in the same way as tRNA(Ser)GCU. These data suggest a growth rate dependence of yeast tRNAs similar to that previously described for E. coli tRNAs.
1993
Baranowski W., Tomaszewski J., Keith G.
Unusual deficiency of the modified purine base queuine in transfer ribonucleic acid from the human placenta as tested by enzymatic assay Article de journal
Dans: Am J Obstet Gynecol, vol. 169, no. 3, p. 581-2, 1993, (0002-9378 Journal Article).
Résumé | BibTeX | Étiquettes: &, derivatives/chemistry, Female, Guanine/*analogs, Human, Placenta/*chemistry, Pregnancy, RNA, Transfer/*chemistry
@article{,
title = {Unusual deficiency of the modified purine base queuine in transfer ribonucleic acid from the human placenta as tested by enzymatic assay},
author = { W. Baranowski and J. Tomaszewski and G. Keith},
year = {1993},
date = {1993-01-01},
journal = {Am J Obstet Gynecol},
volume = {169},
number = {3},
pages = {581-2},
abstract = {Transfer ribonucleic acid from rapidly growing tissues, particularly from neoplasia, is partially deficient in queuine, a highly modified transfer ribonucleic acid constituent. By means of an enzymatic assay we also found a queuine deficiency (14%) in human placenta transfer ribonucleic acid despite its high concentrations in the amniotic fluid. Proposed cause and significance of the results are discussed.},
note = {0002-9378
Journal Article},
keywords = {&, derivatives/chemistry, Female, Guanine/*analogs, Human, Placenta/*chemistry, Pregnancy, RNA, Transfer/*chemistry},
pubstate = {published},
tppubtype = {article}
}
Transfer ribonucleic acid from rapidly growing tissues, particularly from neoplasia, is partially deficient in queuine, a highly modified transfer ribonucleic acid constituent. By means of an enzymatic assay we also found a queuine deficiency (14%) in human placenta transfer ribonucleic acid despite its high concentrations in the amniotic fluid. Proposed cause and significance of the results are discussed.
el Adlouni C., Keith G., Dirheimer G., Szarkowski J. W., Przykorska A.
Rye nuclease I as a tool for structural studies of tRNAs with large variable arms Article de journal
Dans: Nucleic Acids Res, vol. 21, no. 4, p. 941-7, 1993, (0305-1048 Journal Article).
Résumé | BibTeX | Étiquettes: *Nucleotidases, Acid, Animals, Anticodon, Base, Cattle, cereale/*enzymology, cerevisiae, Conformation, Data, Gov't, Leu/chemistry, Molecular, Non-U.S., Nucleic, RNA, Saccharomyces, Secale, Sequence, Ser/chemistry, Support, Transfer, Transfer/*chemistry
@article{,
title = {Rye nuclease I as a tool for structural studies of tRNAs with large variable arms},
author = { C. el Adlouni and G. Keith and G. Dirheimer and J. W. Szarkowski and A. Przykorska},
year = {1993},
date = {1993-01-01},
journal = {Nucleic Acids Res},
volume = {21},
number = {4},
pages = {941-7},
abstract = {A single-strand-specific nuclease from rye germ (Rn nuclease I) was used for secondary and tertiary structure investigations of tRNAs with large variable arms (class II tRNAs). We have studied the structure in solution of two recently sequenced tRNA(Leu): yeast tRNA(Leu)(ncm5UmAA) and bovine tRNA(Leu)(XmAA) as well as yeast tRNA(Leu)(UAG), tRNA(Leu)(m5CAA) and tRNA(Ser)(IGA). The latter is the only tRNA with a long variable arm for which the secondary and tertiary structure has already been studied by use of chemical probes and computer modelling. The data obtained in this work showed that the general model of class II tRNAs proposed by others for tRNA(Ser) can be extended to tRNAs(Leu) as well. However interesting differences in the structure of tRNAs(Leu) versus tRNA(Ser)(IGA) were also noticed. The main difference was observed in the accessibility of the variable loops to nucleolytic attack of Rn nuclease I: variable loops of all studied tRNA(Leu) species were cut by Rn nuclease I, while that of yeast tRNA(Ser)(IGA) was not. This could be due to differences in stability of the variable arms and the lengths of their loops which are 3 and 4 nucleotides in tRNA(Ser)(IGA) and tRNAs(Leu) respectively.},
note = {0305-1048
Journal Article},
keywords = {*Nucleotidases, Acid, Animals, Anticodon, Base, Cattle, cereale/*enzymology, cerevisiae, Conformation, Data, Gov't, Leu/chemistry, Molecular, Non-U.S., Nucleic, RNA, Saccharomyces, Secale, Sequence, Ser/chemistry, Support, Transfer, Transfer/*chemistry},
pubstate = {published},
tppubtype = {article}
}
A single-strand-specific nuclease from rye germ (Rn nuclease I) was used for secondary and tertiary structure investigations of tRNAs with large variable arms (class II tRNAs). We have studied the structure in solution of two recently sequenced tRNA(Leu): yeast tRNA(Leu)(ncm5UmAA) and bovine tRNA(Leu)(XmAA) as well as yeast tRNA(Leu)(UAG), tRNA(Leu)(m5CAA) and tRNA(Ser)(IGA). The latter is the only tRNA with a long variable arm for which the secondary and tertiary structure has already been studied by use of chemical probes and computer modelling. The data obtained in this work showed that the general model of class II tRNAs proposed by others for tRNA(Ser) can be extended to tRNAs(Leu) as well. However interesting differences in the structure of tRNAs(Leu) versus tRNA(Ser)(IGA) were also noticed. The main difference was observed in the accessibility of the variable loops to nucleolytic attack of Rn nuclease I: variable loops of all studied tRNA(Leu) species were cut by Rn nuclease I, while that of yeast tRNA(Ser)(IGA) was not. This could be due to differences in stability of the variable arms and the lengths of their loops which are 3 and 4 nucleotides in tRNA(Ser)(IGA) and tRNAs(Leu) respectively.
Baranowski W, Tomaszewski J, Keith G
Unusual deficiency of the modified purine base queuine in transfer ribonucleic acid from the human placenta as tested by enzymatic assay Article de journal
Dans: Am J Obstet Gynecol, vol. 169, no. 3, p. 581-582, 1993, ISBN: 8372867, (0002-9378 Journal Article).
Résumé | Liens | BibTeX | Étiquettes: Female Guanine/*analogs & derivatives/chemistry Human Placenta/*chemistry Pregnancy RNA, Transfer/*chemistry, Unité ARN
@article{,
title = {Unusual deficiency of the modified purine base queuine in transfer ribonucleic acid from the human placenta as tested by enzymatic assay},
author = {W Baranowski and J Tomaszewski and G Keith},
url = {http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=8372867},
isbn = {8372867},
year = {1993},
date = {1993-01-01},
journal = {Am J Obstet Gynecol},
volume = {169},
number = {3},
pages = {581-582},
abstract = {Transfer ribonucleic acid from rapidly growing tissues, particularly from neoplasia, is partially deficient in queuine, a highly modified transfer ribonucleic acid constituent. By means of an enzymatic assay we also found a queuine deficiency (14%) in human placenta transfer ribonucleic acid despite its high concentrations in the amniotic fluid. Proposed cause and significance of the results are discussed.},
note = {0002-9378
Journal Article},
keywords = {Female Guanine/*analogs & derivatives/chemistry Human Placenta/*chemistry Pregnancy RNA, Transfer/*chemistry, Unité ARN},
pubstate = {published},
tppubtype = {article}
}
Transfer ribonucleic acid from rapidly growing tissues, particularly from neoplasia, is partially deficient in queuine, a highly modified transfer ribonucleic acid constituent. By means of an enzymatic assay we also found a queuine deficiency (14%) in human placenta transfer ribonucleic acid despite its high concentrations in the amniotic fluid. Proposed cause and significance of the results are discussed.
