Lajos Nyarsik's research while affiliated with Max Planck Institute for Molecular Genetics and other places
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Publications (21)
Supplemental figure 2. Determination of optimal spot to spot distance. Using the SciFlexarray printer system a series of samples containing a CMV-driven EGFP construct but with different DNA and or gelatine concentrations were printed in sub-arrays with different spot to spot distances. Slides were transfected with HEK293T cells during 3 days. Clus...
Supplemental figure 1. Re-screening of selected bait and prey constructs. Bait B487 coding for AR-LBD was re-analysed with the 16 different preys summarized in Table 1 of the manuscript. For this purpose triplicate spots of each prey-reporter-bait combination (represented by a sample number as described in supplementary Table 1), positive control (...
Most of the biological processes rely on the formation of protein complexes. Investigation of protein-protein interactions (PPI) is therefore essential for understanding of cellular functions. It is advantageous to perform mammalian PPI analysis in mammalian cells because the expressed proteins can then be subjected to essential post-translational...
The analysis of gene expression is an essential element of functional genomics. Expression analysis is mainly based on DNA microarrays due to highly parallel readout and high throughput. Quantitative PCR (qPCR) based expression profiling is the gold standard for the precise monitoring of selected genes, and therefore used for validation of microarr...
Recently, we established a robust method for the detection of hybridization events using a DNA microarray deposited on a nanoporous membrane. Here, in a follow-up study, we demonstrate the performance of this approach on a larger set of LNA-modified oligoprobes and genomic DNA sequences. Twenty-six different LNA-modified 7-mer oligoprobes were hybr...
We report a robust method for the detection of hybridization events using a microarray-based assay on a nanoporous membrane platform. The technique is characterized by a hybridization time of only 1 hour and uses Cy5-labeled, 7-mer oligodeoxynucleotide probes modified with locked nucleic acid (LNA) nucleotides. We show that the volume of the DNA sp...
An assay for the fluorescent detection of short oligonucleotide probe hybridization in miniaturized high-density array platforms is presented. It combines hybridization in solution with real-time fluorescent detection, which involves measurement of fluorescence increase by means of an induced fluorescence resonance energy transfer. The feasibility...
Proteins are the key components of the cellular machinery responsible for processing changes that are ordered by genomic information. Analysis of most human proteins and nucleic acids is important in order to decode the complex networks that are likely to underlie many common diseases. Significant improvements in current technology are also require...
The expression and characterization of large protein libraries requires high-throughput tools for rapid and cost-effective expression and screening. A promising tool to meet these requirements is miniaturized high-density plates in chip format, consisting of an array of wells with submicroliter volumes. Here, we show the combination of nanowell chi...
Small peptide tags are often fused to proteins to allow their affinity purification in high-throughput structure analysis schemes. To assess the compatibility of small peptide tags with protein crystallization and to examine if the tags alter the three-dimensional structure, the N-terminus of the chicken alpha-spectrin SH3 domain was labeled with a...
The generation of protein chips requires much more efforts than DNA microchips. While DNA is DNA and a variety of different DNA molecules behave stable in a hybridisation experiment, proteins are much more difficult to produce and to handle. Outside of a narrow range of environmental conditions, proteins will denature, lose their three-dimensional...
DNA-chip analysis has come a long way since the first conference in Moscow in 1991. Nowadays, DNA-microarrays seem to be a common commodity in biological sciences. The complexity hidden behind the apparent ease of such studies, however, is highlighted by the fact that it took about ten years before the methodology really set off. Also, on closer sc...
Oligonucleotide fingerprinting is an attractive, high-throughput complement to tag sequencing methods to determine the spectrum and abundance of genes in cDNA libraries. This method currently relies on the sequential hybridizations of short, radioactively labeled DNA oligonucleotides to clone arrays. Here, we describe a new environment that substan...
The usage of standard 96 well microplates for the screening of crystallization conditions of recombinant proteins offers several advantages when compared to commonly used crystallization plate formats. The adoption of robotic technology for plate and glass slide preparation within a "hanging drop" vapour diffusion crystallization experiment enables...
The identification of the DNA structure as a double-stranded helix consisting of two nucleotide chain molecules was a milestone in modern molecular biology. Most of the methods for DNA characterization are based on its ability to form fully or partially complementary double helices from two complementary single strands. To detect hybridization even...
We have used oligonucleotide-fingerprinting data on 60,000 cDNA clones from two different mouse embryonic stages to establish a normalized cDNA clone set. The normalized set of 5,376 clones represents different clusters and therefore, in almost all cases, different genes. The inserts of the cDNA clones were amplified by PCR and spotted on glass sli...
Citations
... The assays have been validated carefully, and results were highly consistent with DNA sequencing. Immobilized LNA probes may also be successfully used in multiplex SNP genotyping assay performed on a microarray platform (32). ...
... The synthesis of Locked Nucleic Acid (LNA) [6] overcame these limitations as LNA modified nucleotides confer low cytotoxicity, high thermostability, resistance to nucleases and stable hybridization abilities with target sequences [7]. Enhanced nucleic acid recognition by LNA-containing oligonucleotides made them desirable for many applications in molecular biology, including genotyping [8] or single nucleotide polymorphism (SNP) analysis [9], hybridization [10,11], decoy and fluorescence polarization [12], expression profiling or microarray [13], allele-specific PCR [14], fluorescent in situ hybridization (FISH) analysis [15], alteration of intron splicing and LNAzymes [16], 5′-nuclease assay [17], real-time PCR [18], siRNA [19], microRNA [20] and antisense [21]. ...
... As proteins are extensively heterogeneous, a simple chip for all types of proteins has not been achieved yet. While DNA is stable, proteins tend to lose their three-dimensional structure and, hence, their functionality and specificity as the conditions fall out of a narrow range (Eickhoff et al. 2002). Though, a variety of proteins and peptide arrays have been developed for the analysis of specific or group of proteins, Surface-Enhanced Laser desorption-ionization (SELDI) Protein ChipR, developed by Ciphergen Biosystems, Inc., involves affinity capture of specific subgroups of proteins based on their biochemical or physical properties which is further analyzed with automated MS (Merchant et al. 2000). ...
... The synthesis of Locked Nucleic Acid (LNA) [6] overcame these limitations as LNA modified nucleotides confer low cytotoxicity, high thermostability, resistance to nucleases and stable hybridization abilities with target sequences [7]. Enhanced nucleic acid recognition by LNA-containing oligonucleotides made them desirable for many applications in molecular biology, including genotyping [8] or single nucleotide polymorphism (SNP) analysis [9], hybridization [10,11], decoy and fluorescence polarization [12], expression profiling or microarray [13], allele-specific PCR [14], fluorescent in situ hybridization (FISH) analysis [15], alteration of intron splicing and LNAzymes [16], 5′-nuclease assay [17], real-time PCR [18], siRNA [19], microRNA [20] and antisense [21]. ...
... MALDI and ESI are highly accurate methods that have been employed for the identification and characterisation of proteins, lipids, sugars and nucleic acids in various biological samples, and as such are ideal for the analysis of bacteria. 124 Whilst some researchers have developed ESI-MS via direct infusion for bacterial classification, 125,126 the vast majority of mass spectrometrybased bacterial identification has been undertaken using MALDI-MS. ...
... The level of expression of all genes of an organism in different types of cells, tissues, developmental stages, or disease processes constitutes essential information for understanding the function of different genes, and to unravel the complex network of biological processes acting in every biological system (Eickhoff et al., 2000). Several challenges pertaining to gene expression studies take account of low abundance, tissue-specific or stage-specific gene expression patterns. ...
... New technologies and the use of automated facilities in the field of protein crystallization have greatly increased the likelihood of obtaining protein crystals. For examples, utilization of sparse matrix screens (Jancarik & Kim, 1991), new screening kits (Cudney et al., 1994;Brzozowski & Walton, 2001;Newman et al., 2005;McPherson & Cudney, 2006;Gorrec, 2009), microfluidics (Hansen et al., 2002;Zheng et al., 2004), automation (Mueller et al., 2001;Santarsiero et al., 2002;Sulzenbacher et al., 2002;Bard et al., 2004;Stock et al., 2005) etc. have contributed a lot in this field. However, the overall success rate remains at approximately 10%, without obvious improvements in the process from purified soluble proteins to structure determination (Kim et al., 2008). ...
... In parallel with new sequencing technologies, scientists have developed high-throughput methods for large-scale genome analyses, such as gene identification, single-nucleotide polymorphism detection and gene expression profiling, in particular cDNA library characterization 17 . To identify and quantify DNA fragments of known sequence in a given sample, DNA microarrays are often used 18,19 . However, this approach suffers from the need to preamplify the target DNA, and resulting data are limited by nonspecific hybridization, adsorption and the need for quantification of fluorescence 18,19 . ...
... Likewise, high yield production (≈2 mg/ml concentration) and purification of a single therapeutic dose of a model protein (superfolder GFP) can be achieved on portable microfluidic bioreactors in which nanoporous membrane were adopted for swift and continuous exchange of small molecules (i.e., nucleotides, inorganic phosphates) and waste products for on-demand, point-of-care applications (Timm, Shankles, Foster, Doktycz, & Retterer, 2016). Similarly, to envision a high-throughput instrument similar to that of protein microarrays, microfluidic devices coupled with CFPS can be adopted for characterization of the expression, immobilization, display, and screening of massive protein libraries in an agile and cost-effective manner (Angenendt et al., 2004). Moreover, "cell mimics" capable of controlling the flux of a natural cell can be replicated by coupling cell-free protein production systems inside nanoporous picolitre volume containers. ...
... Mass spectrometry of purified protein complexes provides an unbiased approach to identifying PPIs, but it is limited to relatively high affinity interactions as well as by sample quantity and purity (Gavin et al., 2011;Frei et al., 2012). Yeast and mammalian two-hybrid systems use libraries that direct fusion protein expression intracellularly and are therefore not readily applicable to extracellular domains (ECDs), which generally do not fold correctly in the cytoplasm (Fiebitz et al., 2008;Rajagopala, 2015). Direct binding assays using immobilized fusion proteins have high sensitivity but require production, purification, and analysis of hundreds or thousands of proteins (Bushell et al., 2008;Ramani et al., 2012;Ö zkan et al., 2013;Tom et al., 2015;Visser et al., 2015;Hsu et al., 2017). ...





















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