Nonnegative principal component analysis for mass spectral serum profiles and biomarker discovery.

abstract：BACKGROUND:Metabolomics experiments using Mass Spectrometry (MS) technology measure the mass to charge ratio (m/z) and intensity of ionised molecules in crude extracts of complex biological samples to generate high dimensional metabolite 'fingerprint' or metabolite 'profile' data. High resolution MS instruments perform...

journal_title：BMC bioinformatics

authors： Draper J,Enot DP,Parker D,Beckmann M,Snowdon S,Lin W,Zubair H

更新日期：2009-07-21 00:00:00

abstract：BACKGROUND:The signal peptide plays an important role in protein targeting and protein translocation in both prokaryotic and eukaryotic cells. This transient, short peptide sequence functions like a postal address on an envelope by targeting proteins for secretion or for transfer to specific organelles for further proc...

journal_title：BMC bioinformatics

authors： Choo KH,Tan TW,Ranganathan S

更新日期：2005-10-13 00:00:00

abstract：BACKGROUND:The topology of a biological pathway provides clues as to how a pathway operates, but rationally using this topology information with observed gene expression data remains a challenge. RESULTS:We introduce a new general-purpose analytic method called Mechanistic Bayesian Networks (MBNs) that allows for the ...

journal_title：BMC bioinformatics

authors： Shah A,Tenzen T,McMahon AP,Woolf PJ

更新日期：2009-12-18 00:00:00

abstract：BACKGROUND:Alignment-free methods for comparing protein sequences have proved to be viable alternatives to approaches that first rely on an alignment of the sequences to be compared. Much work however need to be done before those methods provide reliable fold recognition for proteins whose sequences share little simila...

journal_title：BMC bioinformatics

authors： Nojoomi S,Koehl P

更新日期：2017-08-25 00:00:00

abstract：BACKGROUND:Formal classification of a large collection of protein structures aids the understanding of evolutionary relationships among them. Classifications involving manual steps, such as SCOP and CATH, face the challenge of increasing volume of available structures. Automatic methods such as FSSP or Dali Domain Dict...

journal_title：BMC bioinformatics

authors： Sam V,Tai CH,Garnier J,Gibrat JF,Lee B,Munson PJ

更新日期：2008-01-31 00:00:00

abstract：BACKGROUND:Understanding research activity within any given biomedical field is important. Search outputs generated by MEDLINE/PubMed are not well classified and require lengthy manual citation analysis. Automation of citation analytics can be very useful and timesaving for both novices and experts. RESULTS:PubFocus w...

journal_title：BMC bioinformatics

authors： Plikus MV,Zhang Z,Chuong CM

更新日期：2006-10-02 00:00:00

abstract：BACKGROUND:Selective pressures at the DNA level shape genes into profiles consisting of patterns of rapidly evolving sites and sites withstanding change. These profiles remain detectable even when protein sequences become extensively diverged. A common task in molecular biology is to infer functional, structural or evo...

journal_title：BMC bioinformatics

authors： Ndhlovu A,Hazelhurst S,Durand PM

更新日期：2015-08-14 00:00:00

abstract：BACKGROUND:MicroRNAs (miRNAs) are a class of endogenous regulatory small RNAs which play an important role in posttranscriptional regulations by targeting mRNAs for cleavage or translational repression. The base-pairing between the 5'-end of miRNA and the target mRNA 3'-UTRs is essential for the miRNA:mRNA recognition....

journal_title：BMC bioinformatics

authors： Gu J,Fu H,Zhang X,Li Y

更新日期：2007-11-08 00:00:00

abstract：BACKGROUND:Molecular data, e.g. arising from microarray technology, is often used for predicting survival probabilities of patients. For multivariate risk prediction models on such high-dimensional data, there are established techniques that combine parameter estimation and variable selection. One big challenge is to i...

journal_title：BMC bioinformatics

authors： Sariyar M,Hoffmann I,Binder H

更新日期：2014-02-26 00:00:00

abstract：BACKGROUND:Modules of interacting components arranged in specific network topologies have evolved to perform a diverse array of cellular functions. For a network with a constant topological structure, its function within a cell may still be tuned by changing the number of instances of a particular component (e.g., gene...

journal_title：BMC bioinformatics

authors： Shah NA,Sarkar CA

更新日期：2019-05-14 00:00:00

abstract：BACKGROUND:Most human genes produce several transcripts with different exon contents by using alternative promoters, alternative polyadenylation sites and alternative splice sites. Much effort has been devoted to describing known gene transcripts through the development of numerous databases. Nevertheless, owing to the...

journal_title：BMC bioinformatics

authors： de la Grange P,Dutertre M,Correa M,Auboeuf D

更新日期：2007-06-04 00:00:00

abstract：BACKGROUND:A wide variety of short-read alignment programmes have been published recently to tackle the problem of mapping millions of short reads to a reference genome, focusing on different aspects of the procedure such as time and memory efficiency, sensitivity, and accuracy. These tools allow for a small number of ...

journal_title：BMC bioinformatics

authors： Alachiotis N,Berger S,Flouri T,Pissis SP,Stamatakis A

更新日期：2013-01-01 00:00:00

abstract：BACKGROUND:Kernel-based learning algorithms are among the most advanced machine learning methods and have been successfully applied to a variety of sequence classification tasks within the field of bioinformatics. Conventional kernels utilized so far do not provide an easy interpretation of the learnt representations i...

journal_title：BMC bioinformatics

authors： Meinicke P,Tech M,Morgenstern B,Merkl R

更新日期：2004-10-28 00:00:00

abstract：BACKGROUND:High-throughput measurement of transcript intensities using Affymetrix type oligonucleotide microarrays has produced a massive quantity of data during the last decade. Different preprocessing techniques exist to convert the raw signal intensities measured by these chips into gene expression estimates. Althou...

journal_title：BMC bioinformatics

authors： Giorgi FM,Bolger AM,Lohse M,Usadel B

更新日期：2010-11-11 00:00:00

abstract：BACKGROUND:High-throughput sequencing has rapidly become an essential part of precision cancer medicine. But validating results obtained from analyzing and interpreting genomic data remains a rate-limiting factor. The gold standard, of course, remains manual validation by expert panels, which is not without its weaknes...

journal_title：BMC bioinformatics

authors： Bian X,Zhu B,Wang M,Hu Y,Chen Q,Nguyen C,Hicks B,Meerzaman D

更新日期：2018-11-19 00:00:00

abstract：BACKGROUND:Recent increases in the number of deposited membrane protein crystal structures necessitate the use of automated computational tools to position them within the lipid bilayer. Identifying the correct orientation allows us to study the complex relationship between sequence, structure and the lipid environment...

journal_title：BMC bioinformatics

authors： Nugent T,Jones DT

更新日期：2013-09-18 00:00:00

abstract：BACKGROUND:Drug discovery is the process through which potential new medicines are identified. High-throughput screening and computer-aided drug discovery/design are the two main drug discovery methods for now, which have successfully discovered a series of drugs. However, development of new drugs is still an extremely...

journal_title：BMC bioinformatics

authors： Sang S,Yang Z,Wang L,Liu X,Lin H,Wang J

更新日期：2018-05-30 00:00:00

abstract：BACKGROUND:The lack of sufficient training data is the limiting factor for many Machine Learning applications in Computational Biology. If data is available for several different but related problem domains, Multitask Learning algorithms can be used to learn a model based on all available information. In Bioinformatics...

journal_title：BMC bioinformatics

authors： Widmer C,Toussaint NC,Altun Y,Rätsch G

更新日期：2010-10-26 00:00:00

abstract：BACKGROUND:The study of virus-host infectious association is important for understanding the functions and dynamics of microbial communities. Both cellular and fractionated viral metagenomic data generate a large number of viral contigs with missing host information. Although relative simple methods based on the simila...

journal_title：BMC bioinformatics

authors： Zhang M,Yang L,Ren J,Ahlgren NA,Fuhrman JA,Sun F

更新日期：2017-03-14 00:00:00

abstract：BACKGROUND:Linkage disequilibrium (LD)-the non-random association of alleles at different loci-defines population-specific haplotypes which vary by genomic ancestry. Assessment of allelic frequencies and LD patterns from a variety of ancestral populations enables researchers to better understand population histories as...

journal_title：BMC bioinformatics

authors： Alexander TA,Machiela MJ

更新日期：2020-01-10 00:00:00

abstract：BACKGROUND:Exome sequencing is a promising method for diagnosing patients with a complex phenotype. However, variant interpretation relative to patient phenotype can be challenging in some scenarios, particularly clinical assessment of rare complex phenotypes. Each patient's sequence reveals many possibly damaging vari...

journal_title：BMC bioinformatics

authors： Masino AJ,Dechene ET,Dulik MC,Wilkens A,Spinner NB,Krantz ID,Pennington JW,Robinson PN,White PS

更新日期：2014-07-21 00:00:00

abstract：BACKGROUND:Copy number alterations (CNAs), due to their large impact on the genome, have been an important contributing factor to oncogenesis and metastasis. Detecting genomic alterations from the shallow-sequencing data of a low-purity tumor sample remains a challenging task. RESULTS:We introduce Accucopy, a method t...

journal_title：BMC bioinformatics

authors： Fan X,Luo G,Huang YS

更新日期：2021-01-15 00:00:00

abstract：BACKGROUND:Bioinformatics software quality assurance is essential in genomic medicine. Systematic verification and validation of bioinformatics software is difficult because it is often not possible to obtain a realistic "gold standard" for systematic evaluation. Here we apply a technique that originates from the softw...

journal_title：BMC bioinformatics

authors： Giannoulatou E,Park SH,Humphreys DT,Ho JW

更新日期：2014-01-01 00:00:00

abstract：BACKGROUND:We carried out an analysis of intron length conservation across a diverse group of nineteen mammalian species. Motivated by recent research suggesting a role for time delays associated with intron transcription in gene expression oscillations required for early embryonic patterning, we searched for examples ...

journal_title：BMC bioinformatics

authors： Seoighe C,Korir PK

更新日期：2011-10-05 00:00:00

abstract：BACKGROUND:Due to recent technology advancements, disease related knowledge is growing rapidly. It becomes nontrivial to go through all published literature to identify associations between human diseases and genetic, environmental, and life style factors, disease symptoms, and treatment strategies. Here we report DLAD...

journal_title：BMC bioinformatics

authors： Shen J,Vasaikar S,Zhang B

更新日期：2018-12-28 00:00:00

abstract：BACKGROUND:Variation in DNA copy number, due to gains and losses of chromosome segments, is common. A first step for analyzing DNA copy number data is to identify amplified or deleted regions in individuals. To locate such regions, we propose a circular binary segmentation procedure, which is based on a sequence of nes...

journal_title：BMC bioinformatics

authors： Yang TY

更新日期：2012-10-30 00:00:00

abstract：BACKGROUND:The identification of prognostic genes that can distinguish the prognostic risks of cancer patients remains a significant challenge. Previous works have proven that functional gene sets were more reliable for this task than the gene signature. However, few works have considered the cross-talk among functiona...

journal_title：BMC bioinformatics

authors： Zhou XH,Chu XY,Xue G,Xiong JH,Zhang HY

更新日期：2019-02-18 00:00:00

abstract：BACKGROUND:The adaptive immune response intrinsically depends on hypervariable human leukocyte antigen (HLA) genes. Concomitantly, correct HLA phenotyping is crucial for successful donor-patient matching in organ transplantation. The cost and technical limitations of current laboratory techniques, together with advance...

journal_title：BMC bioinformatics

authors： Matey-Hernandez ML,Danish Pan Genome Consortium.,Brunak S,Izarzugaza JMG

更新日期：2018-06-25 00:00:00

abstract：BACKGROUND:The rabbit is an important model organism used in a wide range of biomedical research. However, the rabbit genome is still sparsely annotated, thus prohibiting extensive functional analysis of gene sets derived from whole-genome experiments. We developed a web-based application that provides augmented annota...

journal_title：BMC bioinformatics

authors： Craig DB,Kannan S,Dombkowski AA

更新日期：2012-05-08 00:00:00

abstract：BACKGROUND:A new algorithm has been developed for generating conservation profiles that reflect the evolutionary history of the subfamily associated with a query sequence. It is based on n-gram patterns (NP{n,m}) which are sets of n residues and m wildcards in windows of size n+m. The generation of conservation profile...

journal_title：BMC bioinformatics

authors： Vries JK,Liu X

更新日期：2008-01-30 00:00:00