共查询到20条相似文献，搜索用时 31 毫秒
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Koji Doi Aeni Hosaka Toshifumi Nagata Kouji Satoh Kohji Suzuki Ramil Mauleon Michael J Mendoza Richard Bruskiewich Shoshi Kikuchi 《BMC plant biology》2008,8(1):20
Background
Information on more than 35 000 full-length Oryza sativa cDNAs, together with associated microarray gene expression data collected under various treatment conditions, has made it feasible to identify motifs that are conserved in gene promoters and may act as cis-regulatory elements with key roles under the various conditions. 相似文献3.
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Background
Core histone genes are periodically expressed along the cell cycle and peak during S phase. Core histone gene expression is deeply evolutionarily conserved from the yeast Saccharomyces cerevisiae to human. 相似文献6.
Marjan De Mey Jo Maertens Gaspard J Lequeux Wim K Soetaert Erick J Vandamme 《BMC biotechnology》2007,7(1):34
Background
Nowadays, the focus in metabolic engineering research is shifting from massive overexpression and inactivation of genes towards the model-based fine tuning of gene expression. In this context, the construction of a library of synthetic promoters of Escherichia coli as a useful tool for fine tuning gene expression is discussed here. 相似文献7.
Joel R McNeal Jennifer V Kuehl Jeffrey L Boore Claude W de Pamphilis 《BMC plant biology》2007,7(1):57
Background
Plastid genome content and protein sequence are highly conserved across land plants and their closest algal relatives. Parasitic plants, which obtain some or all of their nutrition through an attachment to a host plant, are often a striking exception. Heterotrophy can lead to relaxed constraint on some plastid genes or even total gene loss. We sequenced plastid genomes of two species in the parasitic genus Cuscuta along with a non-parasitic relative, Ipomoea purpurea, to investigate changes in the plastid genome that may result from transition to the parasitic lifestyle. 相似文献8.
Sònia Casillas Bárbara Negre Antonio Barbadilla Alfredo Ruiz 《BMC evolutionary biology》2006,6(1):106-15
Background
It is expected that genes that are expressed early in development and have a complex expression pattern are under strong purifying selection and thus evolve slowly. Hox genes fulfill these criteria and thus, should have a low evolutionary rate. However, some observations point to a completely different scenario. Hox genes are usually highly conserved inside the homeobox, but very variable outside it. 相似文献9.
Felix A Grusche Cristina Hidalgo Georgina Fletcher Hsin-Ho Sung Erik Sahai Barry J Thompson 《BMC developmental biology》2009,9(1):14-10
Background
How epithelial cells adopt their particular polarised forms is poorly understood. In a screen for genes regulating epithelial morphology in Drosophila, we identified sds22, a conserved gene previously characterised in yeast. 相似文献10.
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Kendall A Bryant Lauren C Kinkead Marilynn A Larson Steven H Hinrichs Paul D Fey 《BMC microbiology》2010,10(1):8
Background
The highly conserved macromolecular synthesis operon (MMSO) contains both dnaG (primase) and sigA (primary sigma factor). However, in previously evaluated gram-positive species, the MMSO is divergent upstream of dnaG. The MMSO of Bacillus subtilis contains three open reading frames (ORFs) that are differentially regulated by multiple promoters. In conjunction with studies to determine the expression profile of dnaG, the MMSO of Staphylococus epidermidis was characterized. 相似文献12.
Background
Gene clusters are of interest for the understanding of genome evolution since they provide insight in large-scale duplications events as well as patterns of individual gene losses. Vertebrates tend to have multiple copies of gene clusters that typically are only single clusters or are not present at all in genomes of invertebrates. We investigated the genomic architecture and conserved non-coding sequences of vertebrate KCNA gene clusters. KCNA genes encode shaker-related voltage-gated potassium channels and are arranged in two three-gene clusters in tetrapods. Teleost fish are found to possess four clusters. The two tetrapod KNCA clusters are of approximately the same age as the Hox gene clusters that arose through duplications early in vertebrate evolution. For some genes, their conserved retention and arrangement in clusters are thought to be related to regulatory elements in the intergenic regions, which might prevent rearrangements and gene loss. Interestingly, this hypothesis does not appear to apply to the KCNA clusters, as too few conserved putative regulatory elements are retained. 相似文献13.
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Amrita Pati Cecilia Vasquez-Robinet Lenwood S Heath Ruth Grene TM Murali 《BMC bioinformatics》2006,7(1):218-14
Background
Modeling of cis-elements or regulatory motifs in promoter (upstream) regions of genes is a challenging computational problem. In this work, set of regulatory motifs simultaneously present in the promoters of a set of genes is modeled as a biclique in a suitably defined bipartite graph. A biologically meaningful co-occurrence of multiple cis-elements in a gene promoter is assessed by the combined analysis of genomic and gene expression data. Greater statistical significance is associated with a set of genes that shares a common set of regulatory motifs, while simultaneously exhibiting highly correlated gene expression under given experimental conditions. 相似文献16.
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Philippos A Papathanos Nikolai Windbichler Miriam Menichelli Austin Burt Andrea Crisanti 《BMC molecular biology》2009,10(1):65-13