Two promoter elements are necessary and sufficient for expression of the sea urchin U1 snRNA gene.

abstract：:MicroRNAs are small non-coding RNAs that modulate gene expression at post-transcriptional level, playing a crucial role in cell differentiation and development. Recently, some reports have shown that a limited number of mammalian microRNAs are also involved in anti-viral defense. In this study, the analysis of the hep...

journal_title：Nucleic acids research

authors： Potenza N,Papa U,Mosca N,Zerbini F,Nobile V,Russo A

更新日期：2011-07-01 00:00:00

abstract：:Increasing evidence indicates that active DNA demethylation is involved in several processes in mammals, resulting in developmental stage-specificity and cell lineage-specificity. The recently discovered Ten-Eleven Translocation (TET) dioxygenases are accepted to be involved in DNA demethylation by initiating 5-mC oxi...

journal_title：Nucleic acids research

authors： Chen H,Kazemier HG,de Groote ML,Ruiters MH,Xu GL,Rots MG

更新日期：2014-02-01 00:00:00

abstract：:The SRPDB (signal recognition particle database) provides annotated SRP RNA sequences from Eucaryotes and Archaea, phylogenetically ordered and aligned with their bacterial equivalents. We also make available representative RNA secondary structure diagrams, where each base pair is proven by comparative sequence analys...

journal_title：Nucleic acids research

authors： Larsen N,Zwieb C

更新日期：1993-07-01 00:00:00

abstract：:The major surface antigen of procyclic and epimastigote forms of Trypanosoma congolense in the tsetse fly is GARP (glutamic acid/alanine-rich protein), which is thought to be the analogue of procyclin/PARP in Trypanosoma brucei. We have studied two T.congolense GARP loci (the 4.3 and 4.4 loci) whose transcription is a...

journal_title：Nucleic acids research

authors： Graham SV,Jefferies D,Barry JD

更新日期：1996-01-15 00:00:00

abstract：:The Histone Database (HDB) is an annotated and searchable collection of all full-length sequences and structures of histone and non-histone proteins containing the histone fold motif. These sequences are both eukaryotic and archaeal in origin. Several new histone fold-containing proteins have been identified, includin...

journal_title：Nucleic acids research

authors： Sullivan SA,Aravind L,Makalowska I,Baxevanis AD,Landsman D

更新日期：2000-01-01 00:00:00

abstract：:Short repetitive DNA sequences are believed to be one of the primordial genetic elements that served as a source of complex large DNA found in the genome of modern organisms. However, the mechanism of its expansion (increase in repeat number) during the course of evolution is unclear. We demonstrate that the DNA polym...

journal_title：Nucleic acids research

authors： Ogata N,Morino H

更新日期：2000-10-15 00:00:00

abstract：:The NHGRI-EBI GWAS Catalog has provided data from published genome-wide association studies since 2008. In 2015, the database was redesigned and relocated to EMBL-EBI. The new infrastructure includes a new graphical user interface (www.ebi.ac.uk/gwas/), ontology supported search functionality and an improved curation ...

journal_title：Nucleic acids research

authors： MacArthur J,Bowler E,Cerezo M,Gil L,Hall P,Hastings E,Junkins H,McMahon A,Milano A,Morales J,Pendlington ZM,Welter D,Burdett T,Hindorff L,Flicek P,Cunningham F,Parkinson H

更新日期：2017-01-04 00:00:00

abstract：:In two-colour microarrays, the ratio of signal intensities of two co-hybridized samples is used as a relative measure of gene expression. Ratio-based analysis becomes complicated and inefficient in multi-class comparisons. We therefore investigated the validity of an intensity-based analysis procedure. To this end, tw...

journal_title：Nucleic acids research

authors： 't Hoen PA,Turk R,Boer JM,Sterrenburg E,de Menezes RX,van Ommen GJ,den Dunnen JT

更新日期：2004-02-24 00:00:00

abstract：:U4 RNA from chicken, rat and man was examined for nucleotide sequence and secondary structure. Three molecular species, U4A, U4B and U4C were detected in the three animal species. U4A is 146 nucleotide long and U4B RNA only lacks the 3' terminal G. four nucleotides are missing at the 3'-end of U4C RNA which, in additi...

journal_title：Nucleic acids research

authors： Krol A,Branlant C,Lazar E,Gallinaro H,Jacob M

更新日期：1981-06-25 00:00:00

abstract：:Although secondary structure predictions of an individual RNA sequence have been widely used in a number of sequence analyses of RNAs, accuracy is still limited. Recently, we proposed a method (called 'CentroidHomfold'), which includes information about homologous sequences into the prediction of the secondary structu...

journal_title：Nucleic acids research

authors： Hamada M,Yamada K,Sato K,Frith MC,Asai K

更新日期：2011-07-01 00:00:00

abstract：:Given the many roles proposed for Mg2+ in nucleic acids, it is essential to accurately determine their binding modes. Here, we surveyed the PDB to classify Mg2+ inner-sphere binding patterns to nucleobase imine N1/N3/N7 atoms. Among those, purine N7 atoms are considered to be the best nucleobase binding sites for diva...

journal_title：Nucleic acids research

authors： Leonarski F,D'Ascenzo L,Auffinger P

更新日期：2017-01-25 00:00:00

abstract：:A method for quantifying the proportion of supercoiled circular (SC) forms in DNA solutions is described. The method (SCFluo) takes advantage of the reversible denaturation property of SC forms and the high specificity of the PicoGreen fluorochrome for double-stranded (ds)DNA. Fluorescence values of forms capable of r...

journal_title：Nucleic acids research

authors： Levy MS,Lotfian P,O'Kennedy R,Lo-Yim MY,Shamlou PA

更新日期：2000-06-15 00:00:00

abstract：:Detecting recombinations in the genome sequence of human immunodeficiency virus (HIV-1) is crucial for epidemiological studies and for vaccine development. Herein, we present a web server for subtyping and localization of phylogenetic breakpoints in HIV-1. Our software is based on a jumping profile Hidden Markov Model...

journal_title：Nucleic acids research

authors： Zhang M,Schultz AK,Calef C,Kuiken C,Leitner T,Korber B,Morgenstern B,Stanke M

更新日期：2006-07-01 00:00:00

abstract：:The laminin (LM)-database, hosted at http://www.lm.lncc.br, was published in the NAR database 2011 edition. It was the first database that provided comprehensive information concerning a non-collagenous family of extracellular matrix proteins, the LMs. In its first version, this database contained a large amount of in...

journal_title：Nucleic acids research

authors： Golbert DC,Santana-van-Vliet E,Mundstein AS,Calfo V,Savino W,de Vasconcelos AT

更新日期：2014-01-01 00:00:00

abstract：:In nematodes, the 22 nucleotide (nt) spliced leader (SL) is normally encoded by a multi-copy, tandemly reiterated SL gene and is trans-spliced from SL-RNA onto the 5' end of a subset of mRNAs. We have found that the SL is also encoded at multiple (> 100) orphon genomic sites in the parasitic nematode Angiostrongylus c...

journal_title：Nucleic acids research

authors： Joshua GW,Perler FB,Wang CC

更新日期：1995-03-25 00:00:00

abstract：:Using a partially purified replication complex from tobacco chloroplasts, replication origins have been localized to minimal sequences of 82 (pKN8, positions 137 683-137 764) and 243 bp (pKN3, positions 130 513-130 755) for ori A and ori B respectively. Analysis of in vitro replication products by two-dimensional agar...

journal_title：Nucleic acids research

authors： Kunnimalaiyaan M,Nielsen BL

更新日期：1997-09-15 00:00:00

abstract：:The function of arginine, cysteine and carboxylic amino acid (glutamic and aspartic) residues of sigma was studied using chemical modification by group specific reagents. Following modification of 3 arginine residues with phenylglyoxal or 3 cysteine residues with N-ethylmaleimide (NEM) sigma activity was lost. Analysi...

journal_title：Nucleic acids research

authors： Narayanan CS,Krakow JS

更新日期：1983-05-11 00:00:00

abstract：:The Class 3 aldehyde dehydrogenase gene (ALDH-3) is differentially expressed. Expression is either constitutive or xenobiotic inducible via an aromatic hydrocarbon (Ah) receptor-mediated pathway, depending upon the tissue. A series of studies were performed to examine the regulation of rat ALDH-3 basal expression. DNa...

journal_title：Nucleic acids research

authors： Xie YQ,Takimoto K,Pitot HC,Miskimins WK,Lindahl R

更新日期：1996-11-01 00:00:00

abstract：:Rapid and transient activation of both c-fos transcription and mRNA accumulation occurs when resting CCL39 hamster fibroblasts are serum-stimulated to grow. By using several combinations of serum and cycloheximide, a protein synthesis inhibitor, we showed that: i) addition of cycloheximide to resting cell elicits an i...

journal_title：Nucleic acids research

authors： Fort P,Rech J,Vie A,Piechaczyk M,Bonnieu A,Jeanteur P,Blanchard JM

更新日期：1987-07-24 00:00:00

abstract：:Aberrant CpG methylation changes occurring during tumour progression include the loss (hypomethylation) and gain (hypermethylation) of methyl groups. Techniques currently available for examining such changes either require selection of a region, then examination of methylation changes, or utilise methylation-sensitive...

journal_title：Nucleic acids research

authors： Brock GJ,Huang TH,Chen CM,Johnson KJ

更新日期：2001-12-15 00:00:00

abstract：:The MPI Bioinformatics Toolkit (http://toolkit.tuebingen.mpg.de) is an open, interactive web service for comprehensive and collaborative protein bioinformatic analysis. It offers a wide array of interconnected, state-of-the-art bioinformatics tools to experts and non-experts alike, developed both externally (e.g. BLAS...

journal_title：Nucleic acids research

authors： Alva V,Nam SZ,Söding J,Lupas AN

更新日期：2016-07-08 00:00:00

abstract：:Diadenosine 5',5'"-P1,P4-tetraphosphate (Ap4A) has been detected in cysts and developing embryos of the brine shrimp Artemia in amounts 10(4)-10(6) times lower than that of the guanine analogue, Gp4G. The unexpectedly high level of Ap4A in dormant cysts of 2.37 pmol/10(6) cells can be reduced to 0.03 pmol/10(6) cells ...

journal_title：Nucleic acids research

authors： McLennan AG,Prescott M

更新日期：1984-02-10 00:00:00

abstract：:Next-generation sequencing is excellently suited to evaluate the abundance of mRNAs to study gene expression. Here we compare two alternative technologies, cap analysis of gene expression (CAGE) and serial analysis of gene expression (SAGE), for the same RNA samples. Along with quantifying gene expression levels, CAGE...

journal_title：Nucleic acids research

authors： Hestand MS,Klingenhoff A,Scherf M,Ariyurek Y,Ramos Y,van Workum W,Suzuki M,Werner T,van Ommen GJ,den Dunnen JT,Harbers M,'t Hoen PA

更新日期：2010-09-01 00:00:00

abstract：:By means of a combination of ion-exchange and sequence-specific affinity chromatography techniques, we have purified to homogeneity two protein complexes binding in a human DNA region (B48) previously recognized to contain a DNA replication origin. The DNA sequence used for the protein purification (B48 binding site) ...

journal_title：Nucleic acids research

authors： Tóth EC,Marusic L,Ochem A,Patthy A,Pongor S,Giacca M,Falaschi A

更新日期：1993-07-11 00:00:00

abstract：:Uracil may occur in DNA due to either cytosine deamination or thymine replacing incorporation. Its quantitative characterization is important in assessing DNA damages in cells with perturbed thymidylate metabolism or within different DNA segments involved in immunoglobulin gene diversification. The archaeal DNA polyme...

journal_title：Nucleic acids research

authors： Horváth A,Vértessy BG

更新日期：2010-11-01 00:00:00

abstract：:USF is a helix-loop-helix transcription factor that, like Myc, recognizes the DNA binding motif CACGTG. Two different forms of USF, characterized by apparent molecular weights of 43,000 and 44,000, were originally identified in HeLa cells by biochemical analysis. Clones for the 43-kDa USF were first characterized, but...

journal_title：Nucleic acids research

authors： Sirito M,Lin Q,Maity T,Sawadogo M

更新日期：1994-02-11 00:00:00

abstract：:Mismatch uracil DNA glycosylase (Mug) from Escherichia coli is an initiating enzyme in the base-excision repair pathway. As with other DNA glycosylases, the abasic product is potentially more harmful than the initial lesion. Since Mug is known to bind its product tightly, inhibiting enzyme turnover, understanding how ...

journal_title：Nucleic acids research

authors： Grippon S,Zhao Q,Robinson T,Marshall JJ,O'Neill RJ,Manning H,Kennedy G,Dunsby C,Neil M,Halford SE,French PM,Baldwin GS

更新日期：2011-04-01 00:00:00

abstract：:RNA polymerase II (pol II) utilizes a complex interaction network to select and incorporate correct nucleoside triphosphate (NTP) substrates with high efficiency and fidelity. Our previous 'synthetic nucleic acid substitution' strategy has been successfully applied in dissecting the function of nucleic acid moieties i...

journal_title：Nucleic acids research

authors： Hwang CS,Xu L,Wang W,Ulrich S,Zhang L,Chong J,Shin JH,Huang X,Kool ET,McKenna CE,Wang D

更新日期：2016-05-05 00:00:00

abstract：:The Mouse Genome Database (MGD, http://www.informatics.jax.org) is the international community resource for integrated genetic, genomic and biological data about the laboratory mouse. Data in MGD are obtained through loads from major data providers and experimental consortia, electronic submissions from laboratories a...

journal_title：Nucleic acids research

authors： Eppig JT,Blake JA,Bult CJ,Kadin JA,Richardson JE,Mouse Genome Database Group.

更新日期：2012-01-01 00:00:00

abstract：:Protein structures often show similarities to another which would not be seen at the sequence level. Given the coordinates of a protein chain, the SALAMI server at www.zbh.uni-hamburg.de/salami will search the protein data bank and return a set of similar structures without using sequence information. The results page...

journal_title：Nucleic acids research

authors： Margraf T,Schenk G,Torda AE

更新日期：2009-07-01 00:00:00