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Sur VP, Simonik O, Novotna M, Mazumdar A, Liska F, Vimberg V, Komrskova K. Dynamic study of small toxic hydrophobic proteins PepA1 and PepG1 of Staphylococcus aureus. Int J Biol Macromol 2022; 219:1360-1371. [PMID: 35932805 DOI: 10.1016/j.ijbiomac.2022.07.192] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/22/2022] [Accepted: 07/23/2022] [Indexed: 11/16/2022]
Abstract
Toxin-antitoxin (TA) systems are small genetic elements which encode toxin proteins that interfere with vital cellular functions. PepA1 and PepG1 toxin proteins, known also as SprA1 and SprG1, are type I TA. In Staphylococcus aureus (S. aureus), their expression without the antitoxin counterparts (SprA1AS and SprF1), is lethal to the pathogen. Molecular Dynamics (MD) simulation was performed for PepA1 and PepG1 to understand their dynamic state, conformational changes, and their toxicity. The protein structures were constructed and used for MD simulation and the conformational changes, stability, flexibility, fluctuations, hydrophobicity, and role of their dynamic state on function prediction were studied extensively by GROMACS MD simulation analysis tools. In silico study indicated that the PepA1 and PepG1 proteins change their structural conformation from an open to closed state where PepA1 conformational changes were faster (10 ns) than PepG1 (20 ns) while PepG1 exerted more stability and flexibility than PepA1. According to SASA values, PepG1 is more hydrophobic than the PepA1 and forms fewer hydrogen bonds than PepA1. The in vivo study with PepA1 and PepG1 proteins provided evidence that both the conformation changes between the open and closed states and the amino acid sequence are crucial for peptide toxicity.
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Affiliation(s)
- Vishma Pratap Sur
- Laboratory of Reproductive Biology, Institute of Biotechnology of the Czech Academy of Sciences, Prumyslova 595, 25250 Vestec, Czech Republic
| | - Ondrej Simonik
- Laboratory of Reproductive Biology, Institute of Biotechnology of the Czech Academy of Sciences, Prumyslova 595, 25250 Vestec, Czech Republic
| | - Michaela Novotna
- Laboratory for Biology of Secondary Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic
| | - Aninda Mazumdar
- Laboratory for Biology of Secondary Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic
| | - Frantisek Liska
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University in Prague, Albertov 4, 128 00 Prague, Czech Republic
| | - Vladimir Vimberg
- Laboratory for Biology of Secondary Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic
| | - Katerina Komrskova
- Laboratory of Reproductive Biology, Institute of Biotechnology of the Czech Academy of Sciences, Prumyslova 595, 25250 Vestec, Czech Republic; Department of Zoology, Faculty of Science, Charles University, Vinicna 7, 128 44 Prague, Czech Republic.
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Pazourkova E, Zednikova I, Korabecna M, Kralova J, Pisacka M, Novotna M, Calda P, Horinek A. Optimization of diagnostic strategy for non-invasive cell-free foetal RHD determination from maternal plasma. Vox Sang 2021; 116:1012-1019. [PMID: 33761162 DOI: 10.1111/vox.13099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 11/20/2020] [Accepted: 03/01/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVES The aim of the study was to optimize routine non-invasive prenatal detection of fetal RHD gene from plasma of RhD-negative pregnant women (the median of gestational age was 25 weeks, range 10-38) to detect RhD materno-fetal incompatibility and to avoid the redundant immunoprophylaxis. MATERIALS AND METHODS Initially only one exon of RHD gene (exon 10) was investigated in 281 plasma samples (144 verified after delivery), in the second phase three RHD exons (5, 7, 10) were analyzed in 246 samples of plasma and maternal genomic DNA (204 verified) by real-time PCR method. Detection of Y-chromosomal sequence DYS-14 and five X-chromosomal insertion/deletion polymorphisms was used to confirm the fetal cfDNA detectability in plasma. Specific polymorphisms in RHD gene were detected by sequence-specific primer PCR in nine samples. RESULTS When only the RHD exon 10 was tested, 2·8% of verified samples were false positive and 3·5% false negative. With three RHD exons (5, 7, 10) and maternal genomic DNA testing, only one case was false negative (0·5%). Nine samples were inconclusive due to RHD-positive results in maternal genomic DNA. These samples were analyzed for specific mutations in RHD gene. Combination of both methods for fetal cfDNA verification succeeded in 75% of tested group. CONCLUSION Implementation of analysis of three RHD exons and maternal genomic DNA to routine practice lowers dramatically the ratio of false positive and negative results. This method enables more accurate determination of fetal RHD status with the reduction of unnecessary medical care and RhD immunoprophylaxis.
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Affiliation(s)
- Eva Pazourkova
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Praha, Czech Republic.,Department of Nephrology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Praha, Czech Republic
| | - Iveta Zednikova
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Praha, Czech Republic
| | - Marie Korabecna
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Praha, Czech Republic
| | - Jana Kralova
- Department of Immunohematology, Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Martin Pisacka
- Department of Immunohematology, Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Michaela Novotna
- Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Praha, Czech Republic
| | - Pavel Calda
- Department of Obstetrics and Gynecology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Praha, Czech Republic
| | - Ales Horinek
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Praha, Czech Republic.,3rd Department of Medicine, Department of Endocrinology and Metabolism, First Faculty of Medicine, Charles University and General University Hospital in Prague, Praha, Czech Republic
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Arenbergerova M, Fialova A, Gkalpakiotis S, Kodet R, Jancarkova T, Novotna M, Hess A, Puzanov I, Arenberger P. Development of chronic lymphocytic leukaemia during ipilimumab therapy in a patient with metastatic melanoma. J Eur Acad Dermatol Venereol 2015; 30:1626-7. [DOI: 10.1111/jdv.13227] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Arenbergerova
- Department of Dermatovenereology; Third Faculty of Medicine; Charles University; Prague 10 Czech Republic
| | - A. Fialova
- Department of Dermatovenereology; Third Faculty of Medicine; Charles University; Prague 10 Czech Republic
| | - S. Gkalpakiotis
- Department of Dermatovenereology; Third Faculty of Medicine; Charles University; Prague 10 Czech Republic
| | - R. Kodet
- Department of Pathology and Molecular Medicine; 2nd Faculty of Medicine; Charles University; Prague 5 Czech Republic
| | - T. Jancarkova
- Department of Hematology; Third Faculty of Medicine; Charles University; Prague 10 Czech Republic
| | - M. Novotna
- Department of Radiodiagnostics; Liberec Hospital; Liberec Czech Republic
| | - A. Hess
- Division of Hematology - Oncology; Vanderbilt University Medical Center; Nashville TN USA
| | - I. Puzanov
- Division of Hematology - Oncology; Vanderbilt University Medical Center; Nashville TN USA
| | - P. Arenberger
- Department of Dermatovenereology; Third Faculty of Medicine; Charles University; Prague 10 Czech Republic
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De Felice KM, Novotna M, Enders FT, Faubion WA, Tremaine WJ, Kantarci OH, Raffals LE. Idiopathic inflammatory demyelinating disease of the central nervous system in patients with inflammatory bowel disease: retrospective analysis of 9095 patients. Aliment Pharmacol Ther 2015; 41:99-107. [PMID: 25348720 PMCID: PMC4489698 DOI: 10.1111/apt.12997] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 09/12/2014] [Accepted: 09/30/2014] [Indexed: 12/13/2022]
Abstract
BACKGROUND Anti-TNFα biologics induce and maintain remission in inflammatory bowel disease (IBD). Also, they have been reported to induce or unmask idiopathic inflammatory demyelinating disease of the central nervous system (IIDD). AIM To determine if anti-TNFα biologics increased the risk of IIDD in a large cohort of patients with IBD. METHODS We retrospectively identified adult patients referred to the Mayo Clinic, Rochester, MN for management of IBD from a five state capture area (Minnesota, Wisconsin, North Dakota, South Dakota and Iowa) between 1996 and 2010. IIDDs were identified in both Crohn's disease (CD) and ulcerative colitis (UC) patients with and without anti-TNFα exposure using the 2010 McDonald MRI criteria. The risk of IIDDs in patients with and without anti-TNFα exposure was estimated for IBD; CD and UC groups separately. RESULTS A total of 9095 patients with IBD were identified (4342 CD and 4753 UC). Four patients with CD with exposure to anti-TNFα agents (4/2054) and five patients with CD without anti-TNFα exposure (5/2288) developed a confirmed IIDD. One patient with UC with exposure to anti-TNFα agents (1/1371) and five patients with UC without anti-TNFα agents developed a confirmed IIDD (5/3382). The per cent of IIDDs in patients with and without anti-TNFα exposure was; IBD: 0.15% and 0.18% (RR = 0.83, 95% CI: 0.28-2.42; P = 0.729); CD: 0.19% and 0.22% (RR = 0.89, 95% CI: 0.24-3.31; P = 0.863); UC: 0.07% and 0.15% (RR = 0.49, 95% CI: 0.06-4.22; P = 0.510). CONCLUSION Anti-TNFα biologics do not appear to impact the risk of developing clinical idiopathic inflammatory demyelinating disease in patients with inflammatory bowel disease.
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Affiliation(s)
- K M De Felice
- Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
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Kolbekova P, Kourbatova E, Novotna M, Kodym P, Flegr J. New and old risk-factors for Toxoplasma gondii infection: prospective cross-sectional study among military personnel in the Czech Republic. Clin Microbiol Infect 2007; 13:1012-7. [PMID: 17617185 DOI: 10.1111/j.1469-0691.2007.01771.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The aims of this study were to evaluate seroprevalence and the importance of various risk-factors for Toxoplasma infection in the Czech Republic. A prospective cross-sectional survey was conducted among military personnel in Prague. Consenting subjects (n = 3250) completed a questionnaire concerning demographics and risk-factors, and blood samples were taken to determine anti-Toxoplasma antibody titres according to complement fixation and ELISA IgG and IgM tests. The seroprevalence of toxoplasmosis was 23%. In multivariate analysis, independent predictors of Toxoplasma seropositivity were age (OR 1.03 / year), consumption of raw meat (OR 1.35), owning a cat (OR 1.25), owning rabbits (OR 1.47), childhood residence in a town with a population of <10 000 inhabitants (OR 1.63) vs. location of the childhood residence in a town with population of >100 000 inhabitants, and blood group type A (OR 1.28), B (OR 1.33) or AB (OR 1.43) vs. O. These results suggested that horizontal toxoplasmosis transmission in the Czech Republic may occur through consumption of raw meat, contact with cat faeces and farming.
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Affiliation(s)
- P Kolbekova
- Department of Parasitology, Faculty of Science, Charles University, Prague, Czech Republic
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Nosek J, Novotna M, Hlavatovicova Z, Ussery DW, Fajkus J, Tomaska L. Complete DNA sequence of the linear mitochondrial genome of the pathogenic yeast Candida parapsilosis. Mol Genet Genomics 2004; 272:173-80. [PMID: 15449175 DOI: 10.1007/s00438-004-1046-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2004] [Accepted: 07/12/2004] [Indexed: 01/27/2023]
Abstract
The complete sequence of the mitochondrial DNA of the opportunistic yeast pathogen Candida parapsilosis was determined. The mitochondrial genome is represented by linear DNA molecules terminating with tandem repeats of a 738-bp unit. The number of repeats varies, thus generating a population of linear DNA molecules that are heterogeneous in size. The length of the shortest molecules is 30,922 bp, whereas the longer molecules have expanded terminal tandem arrays (nx738 bp). The mitochondrial genome is highly compact, with less than 8% of the sequence corresponding to non-coding intergenic spacers. In silico analysis predicted genes encoding fourteen protein subunits of complexes of the respiratory chain and ATP synthase, rRNAs of the large and small subunits of the mitochondrial ribosome, and twenty-four transfer RNAs. These genes are organized into two transcription units. In addition, six intronic ORFs coding for homologues of RNA maturase, reverse transcriptase and DNA endonucleases were identified. In contrast to its overall molecular architecture, the coding sequences of the linear mitochondrial DNA of C. parapsilosis are highly similar to their counterparts in the circular mitochondrial genome of its close relative C. albicans. The complete sequence has implications for both mitochondrial DNA replication and the evolution of linear DNA genomes.
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Affiliation(s)
- J Nosek
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University, Mlynska dolina CH-1, 842 15, Bratislava, Slovak Republic
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Gogela J, Maly Z, Novotna M, Kuritka M, Hruban M. Value of the vibroacoustic stimulation test in prediction of fetal outcome in low risk term pregnancy. Int J Gynaecol Obstet 2000. [DOI: 10.1016/s0020-7292(00)83078-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mal Z, Grosmanova A, Pulkrabkova S, Novotna M. Induction of labour in the beginning of the 43rd week of pregnancy is safe and cost effective. Int J Gynaecol Obstet 2000. [DOI: 10.1016/s0020-7292(00)85300-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Novotna M, Vojtiskova M, Pilka L, Vesely J, Crha I, Gaillyova R, Popelinska E, Kadlecova J. R-027. The role of molecular genetic screening in men with idiopathic azoospermia and severe oligozoospermia. Hum Reprod 1999. [DOI: 10.1093/humrep/14.suppl_3.291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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