Abstract：
:The base analogue 6-N-hydroxylaminopurine (HAP) is a potent mutagen in a variety of prokaryotic and eukaryotic organisms. Mutations in the yeast ham1 gene render the cells hypersensitive to the mutagenic effect of HAP. We have found that this gene has homologues in a variety of organisms from bacteria to man. We have overexpressed yeast Ham1p in E. coli. We demonstrate that under conditions when this protein constitutes approximately 30% of cellular protein, the host strain is protected both from toxic and mutagenic effects of HAP. This result indicates that sole Ham1p activity might be sufficient for destruction of HAP or its metabolites in bacterial cells.
journal_name
Acta Biochim Poljournal_title
Acta biochimica Polonicaauthors
Kozmin SG,Leroy P,Pavlov YIsubject
Has Abstractpub_date
1998-01-01 00:00:00pages
645-52issue
3eissn
0001-527Xissn
1734-154Xjournal_volume
45pub_type
杂志文章abstract：:Uracil-DNA glycosylase of Archaeoglobus fulgidus (Afung) in cell extracts exhibited maximal activity around pH 6.2 as compared to pH 4.8 for the purified recombinant enzyme expressed in Escherichia coli. Native Afung thus seems to be adapted to the intracellular pH of A. fulgidus, determined to be 7.0±0.1. Both recomb...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：2014-01-01 00:00:00
abstract：:Microbiological purity control of food products is of great importance in the food industry. Contaminated food is often characterized by a deteriorated taste, smell, and appearance, and when consumed, it can pose a threat to human health and life. Also, contamination incurs huge financial losses to the food industry. ...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：10.18388/abp.2020_5380
更新日期：2020-09-14 00:00:00
abstract：:In contrast to most other eukaryotic organisms, yeast can survive without respiration. This ability has been exploited to investigate nuclear genes required for expression of mitochondrial DNA. Availability of complete Saccharomyces cerevisiae genomic sequence has provided additional help in detailed molecular analysi...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章,评审
doi：
更新日期：2000-01-01 00:00:00
abstract：:An approximately threefold increase in glycogenolytic activity of the neutral alpha-1,4-glucosidase and a twofold increase in the same activity of the acid isoform have been found in extracts of anaplastic astrocytoma and glioblastoma multiforme tumors of brain tissue. "Maltase activity" of the respective enzymes incr...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：2001-01-01 00:00:00
abstract：:We examined the molecular basis of factor IX deficiency in 53 unrelated Polish patients with hemophilia B. Heteroduplex analysis and direct sequencing of polymerase chain reaction (PCR) products were applied to identify the gene defect. Forty-three different point mutations were detected in the factor IX gene of 47 pa...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1999-01-01 00:00:00
abstract：:Trans-diamminedichloroplatinum(II) (trans-DDP) forms with DNA at 37 degrees C, more numerous interstrand cross-links than cis-DDP in the isolated DNA and DNA in the chromatin complex. An increase in the temperature to 42.5 degrees C had no effect on the interstrand cross-links of DND-Pt-DNA formed by the two isomers, ...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1990-01-01 00:00:00
abstract：:The evidence on the crucial role of a family of calcium-dependent cysteine proteases called calpains in programmed cell death is rich and still growing. However, understanding of the mechanisms of their functions in apoptosis is not full yet. Calpains have been implicated in both physiological and pathological cell de...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章,评审
doi：
更新日期：2011-01-01 00:00:00
abstract：:Ledakrin, 1-nitro-9-[3'-(N,N'-dimethyl)aminopropyl]aminoacridine administered intraperitoneally at a dose up to 20 mg/kg into sham operated and partially hepatectomized rats inhibited RNA polymerase B activity in the isolated liver nuclei. The average chain length of the in vitro transcript was reduced while the numbe...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1982-01-01 00:00:00
abstract：:Spontaneous mutations arise not only in exponentially growing bacteria but also in non-dividing or slowly dividing stationary-phase cells. In the latter case mutations are called adaptive or stationary-phase mutations. High spontaneous mutability has been observed in temperature sensitive Escherichia coli dnaQ49 strai...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：045103683
更新日期：2004-01-01 00:00:00
abstract：:This study aimed to evaluate the antidotal potency of tenocyclidine (TCP) that probably might protect acetylcholinesterase (AChE) in the case of organophosphate poisoning. TCP was tested alone as a pretreatment or in combination with atropine as a therapy in rats poisoned with (1/4) and (1/2) of LD(50) of soman. Possi...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：2008-01-01 00:00:00
abstract：:Ammonium salt of N-(dithiocarboxy)sarcosine (DTCS) chelated to ferrous salt was tested as an NO-metric spin trap at room temperature for ex vivo measurement of (.)NO production in murine endotoxaemia. In a chemically defined in vitro model system EPR triplet signals of NO-Fe(DTCS)(2) were observed for as long as 3 hou...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：035003799
更新日期：2003-01-01 00:00:00
abstract：:Mitochondria were prepared from rat liver, solubilized with Triton X-100 and submitted to chromatography on dry hydroxylapatite. The pass-through from the column, containing a mixture of mitochondrial carriers, was processed further by triazine dye affinity chromatography and optimal conditions for binding and elution...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1990-01-01 00:00:00
abstract：:Fluorimetric method based on oxidation of the fluorogenic 6-methoxy-2-naphthaldehyde was applied to evaluate temporal and population variability of the specific activity of salivary aldehyde dehydrogenase (ALDH) and the degree of its inactivation in healthy human population. Analyzed was also its dependence on drinkin...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：2010-01-01 00:00:00
abstract：:Two different molecular forms of bacteriolytic endo-N-acetylmuramidase (EC 3.2.1.17) were found in the Acanthamoeba castellanii culture. The enzymes were separated by column chromatography on DEAE-Sephadex or by polyacrylamide-gel electrophoresis. In young cultures only one molecular form of the enzyme was selectively...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1978-01-01 00:00:00
abstract：:Rat duodenum and jejunum were found to contain three forms of alkaline phosphatase, F1, F2 and F3, and ileum two forms of this enzyme, F1 and F2. The procedure for separation of phosphatase F1, F2 and F3 from jejunum is presented. ...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1986-01-01 00:00:00
abstract：:Leukemia is a particular type of cancer characterized by the failure of cell death or disability in differentiation of hematopoietic cells. Chronic myelogenus leukemia (CML) is the most studied kind of this cancer. In this study, anti-cancer effect of dihydro-pyranochromenes derivatives were investigated in the human ...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：10.18388/abp.2014_825
更新日期：2015-01-01 00:00:00
abstract：:Spectroscopic, photochemical and biological properties of indocyanine green (ICG) are presented. Light over 800 nm is effectively absorbed by ICG. This property as well as photochemical behaviour of ICG make it a very suitable dye for photodynamic treatment of melanoma cells. Cytotoxicity of ICG itself and the effect ...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：2002-01-01 00:00:00
abstract：:The aim of this study was to analyse the correlation between HPV16 E6 variants and the physical status of viral genome (integrated, mixed, episomal) among patients with cervical cancer (n=40) and low-grade squamous intraepithelial lesions - LSIL (n=40). The study was performed on 80 HPV16 positive samples. HPV16 E6 va...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：10.18388/abp.2016_1364
更新日期：2017-01-01 00:00:00
abstract：:The aim of this study was to compare the content of carotenoids in seventeen cultivars of carrots grown in Poland. Conventional orange cultivars with rarely grown were compared: white, yellow and purple with yellow core cultivars. To determine the content of carotenoids, extracts from lyophilized carrot roots were pre...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：2012-01-01 00:00:00
abstract：:The aim of this study was to evaluate the accuracy of commercial gradient test (Etest) in the detection of triazole resistant Aspergillus fumigatus isolates using reference microdilution methods and the analysis of sequences of the cyp 51A gene. The study was performed on twenty clinical isolates which were identified...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：10.18388/abp.2017_1571
更新日期：2017-01-01 00:00:00
abstract：:Time course of glucose binding by histone Hl and total histones was followed in isolated histone preparations and in thymus nuclei. In both cases the uptake of glucose by Hl was surprisingly high in contrast to a much lower uptake of glucose by total histones. DNA is not implicated in glycation of histones in nuclei. ...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1994-01-01 00:00:00
abstract：:Two recently synthesized groups of acridine cytostatics containing fused heterocyclic ring(s): pyrazoloacridines (PAC) and pyrazolopyrimidoacridines (PPAC) were tested in regard to their in vitro cytotoxic activity towards a panel of sensitive and resistant human tumor cell lines. The obtained results corroborate our ...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：2002-01-01 00:00:00
abstract：:Cyclosporine A (CsA), a widely used immunosuppressive drug, exerts nephrotoxic activities, as demonstrated by increased tubulointerstitial fibrosis, inflammation and podocyte damage. Recently, a number of microRNAs expressed in the kidney have been reported to be elevated during renal damage. Our aim was to investigat...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：10.18388/abp.2018_2658
更新日期：2018-11-27 00:00:00
abstract：:1. Gluconeogenesis from glutamine, fumarate, pyruvate, glutamine plus fumarate, and glutamine plus pyruvate, was generally higher at pH 7.1 than at pH 7.4 and 7.7, whereas ammoniagenesis did not depend on the pH of the medium. 2. The intermediates of the Krebs cycle decreased ammonia formation from glutamine, raising ...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1977-01-01 00:00:00
abstract：:Nasopharyngeal carcinoma (NPC) cells are highly radiosensitive. Historically, the main modality for NPC has been radiotherapy. Now, to explore a novel and more effective approach to NPC therapy, a combined strategy of suicide gene and radiation was developed. The yeast CDglyTK (yCDglyTK) gene controlled by a synthetic...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：2005-11-06 00:00:00
abstract：BACKGROUND:Recent studies showed that sushi repeat containing protein X linked 2 (SRPX2) could participate in the development of various malignant tumors. However, its role in non-small cell lung cancer (NSCLC) was unknown. The aim of the study was to prospectively investigate the role of SRPX2 in NSCLC cell proliferat...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：10.18388/abp.2020_5158
更新日期：2020-06-18 00:00:00
abstract：:The PCR conditions have been optimized to make the process faster and more economical. When short DNA fragments are to be amplified, the time of denaturation, annealing and extension steps can be as short as 1 s each, and the yield of PCR product is still high, sufficient for many types of analysis. The PCR can be don...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1995-01-01 00:00:00
abstract：:Efficient synthesis of two small eukaryotic polypeptides of human and plant origin was carried out using a novel expression/secretion yeast vector, pYET. The yield was optimized in respect of the yeast strain, expression cassette construction, promoter regulation and culture conditions. Both cloned genes code for biot...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：
更新日期：1996-01-01 00:00:00
abstract：:In many plants belonging to angiosperms and gymnosperms the accumulation in leaves of long chain polyprenols and polyprenyl esters during growth in natural habitats depends on the light intensity. The amount of polyprenols in leaves is also positively correlated with the thickness of the leaf blade (SLA, specific leaf...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：055201233
更新日期：2005-01-01 00:00:00
abstract：:Clofarabine (2-chloro-2'-fluoro-2'-deoxyarabinosyladenine, ClF), a second-generation 2'-deoxyadenosine analog, possesses manifold anti-cancer activities. Our previous reports and some of others demonstrate the potential capacity of ClF to regulate the epigenetic machinery. The study presented here is the first to inve...
journal_title：Acta biochimica Polonica
pub_type： 杂志文章
doi：10.18388/abp.2020_2901
更新日期：2020-01-30 00:00:00
