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1.
Background
The tissue distributions and functions of Eph receptors and their ephrin ligands have been well studied, however less is known about their evolutionary history. We have undertaken a phylogenetic analysis of Eph receptors and ephrins from a number of invertebrate and vertebrate species. 相似文献2.
João CR Cardoso Florbela A Vieira Ana S Gomes Deborah M Power 《BMC evolutionary biology》2010,10(1):135
Background
The secretin family is a pleotropic group of brain-gut peptides with affinity for class 2 G-protein coupled receptors (secretin family GPCRs) proposed to have emerged early in the metazoan radiation via gene or genome duplications. In human, 10 members exist and sequence and functional homologues and ligand-receptor pairs have been characterised in representatives of most vertebrate classes. Secretin-like family GPCR homologues have also been isolated in non-vertebrate genomes however their corresponding ligands have not been convincingly identified and their evolution remains enigmatic. 相似文献3.
Una Rauchhaus Franz Werner Schwaiger Steffen Panzner 《Arthritis research & therapy》2009,11(6):R190-9
Introduction
Glucocorticoids have extensively been used in the treatment of rheumatoid arthritis and other inflammatory diseases. However, their side-effects remain the major limitation in clinical use and an improved therapeutic index is needed. 相似文献4.
Background
The cystatin superfamily comprises cysteine protease inhibitors that play key regulatory roles in protein degradation processes. Although they have been the subject of many studies, little is known about their genesis, evolution and functional diversification. Our aim has been to obtain a comprehensive insight into their origin, distribution, diversity, evolution and classification in Eukaryota, Bacteria and Archaea. 相似文献5.
Michael J Joss Jeremy E Koenig Maurizio Labbate Martin F Polz Michael R Gillings Harold W Stokes W Ford Doolittle Yan Boucher 《BMC bioinformatics》2009,10(1):118-9
Background
Although integrons and their associated gene cassettes are present in ~10% of bacteria and can represent up to 3% of the genome in which they are found, very few have been properly identified and annotated in public databases. These genetic elements have been overlooked in comparison to other vectors that facilitate lateral gene transfer between microorganisms. 相似文献6.
Danilo E Xavier Renata C Picão Raquel Girardello Lorena CC Fehlberg Ana C Gales 《BMC microbiology》2010,10(1):217
Background
Multi-drug efflux pumps have been increasingly recognized as a major component of resistance in P. aeruginosa. We have investigated the expression level of efflux systems among clinical isolates of P. aeruginosa, regardless of their antimicrobial susceptibility profile. 相似文献7.
Humberto H Lara Nilda V Ayala-Nu?ez Liliana Ixtepan-Turrent Cristina Rodriguez-Padilla 《Journal of nanobiotechnology》2010,8(1):1
Background
Silver nanoparticles have proven to exert antiviral activity against HIV-1 at non-cytotoxic concentrations, but the mechanism underlying their HIV-inhibitory activity has not been not fully elucidated. In this study, silver nanoparticles are evaluated to elucidate their mode of antiviral action against HIV-1 using a panel of different in vitro assays. 相似文献8.
Background
Protein-protein interactions play essential roles in protein function determination and drug design. Numerous methods have been proposed to recognize their interaction sites, however, only a small proportion of protein complexes have been successfully resolved due to the high cost. Therefore, it is important to improve the performance for predicting protein interaction sites based on primary sequence alone. 相似文献9.
Xavier Bailly Stefano Vanin Christine Chabasse Kenji Mizuguchi Serge N Vinogradov 《BMC evolutionary biology》2008,8(1):244
Background
Hemerythrins, are the non-heme, diiron binding respiratory proteins of brachiopods, priapulids and sipunculans; they are also found in annelids and bacteria, where their functions have not been fully elucidated. 相似文献10.
Roderick F Felsheim Michael J Herron Curtis M Nelson Nicole Y Burkhardt Anthony F Barbet Timothy J Kurtti Ulrike G Munderloh 《BMC biotechnology》2006,6(1):42-9
Background
Tick-borne pathogens cause emerging zoonoses, and include fastidious organisms such as Anaplasma phagocytophilum. Because of their obligate intracellular nature, methods for mutagenesis and transformation have not been available. 相似文献11.
Background
Previous epidemiologic studies have examined the association of smoking with amyotrophic lateral sclerosis (ALS) incidence, but their results have been inconsistent. Moreover, limited information exists on the association between smoking and survival in ALS patients. We evaluated the association of smoking with ALS incidence and survival in a population-based cohort. 相似文献12.
Patterns of intron sequence evolution in Drosophila are dependent upon length and GC content
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Penelope R Haddrill Brian Charlesworth Daniel L Halligan Peter Andolfatto 《Genome biology》2004,6(8):R67
Background
Introns comprise a large fraction of eukaryotic genomes, yet little is known about their functional significance. Regulatory elements have been mapped to some introns, though these are believed to account for only a small fraction of genome wide intronic DNA. No consistent patterns have emerged from studies that have investigated general levels of evolutionary constraint in introns. 相似文献13.
Tingzhe Sun Chun Chen Yuanyuan Wu Shuai Zhang Jun Cui Pingping Shen 《BMC bioinformatics》2009,10(1):190
Background
The tumor suppressor p53 plays pivotal roles in tumorigenesis suppression. Although oscillations of p53 have been extensively studied, the mechanism of p53 pulses and their physiological roles in DNA damage response remain unclear. 相似文献14.
Tomita M Matsuzaki Y Edagawa M Shimizu T Hara M Onitsuka T 《World journal of surgical oncology》2003,1(1):25
Background
Mast cells have been documented to have several key functions with regards to malignant neoplasms. However, the functional significance of their accumulation is largely unknown. An analysis of the mast cell profile in mediastinal lymph nodes from lung cancer patients is reported here. 相似文献15.
Background
Mitochondrial tRNAs have been the subject of study for structural biologists interested in their secondary structure characteristics, evolutionary biologists have researched patterns of compensatory and structural evolution and medical studies have been directed towards understanding the basis of human disease. However, an up to date, manually curated database of mitochondrially encoded tRNAs from higher animals is currently not available. 相似文献16.
17.
Background
Many different sexual isolation and sexual selection statistics have been proposed in the past. However, there is no available software that implements all these statistical estimators and their corresponding tests for the study of mating behaviour. 相似文献18.
Arunachalam Vinayagam Coral del Val Falk Schubert Roland Eils Karl-Heinz Glatting Sándor Suhai Rainer König 《BMC bioinformatics》2006,7(1):161-7
Background
Vast progress in sequencing projects has called for annotation on a large scale. A Number of methods have been developed to address this challenging task. These methods, however, either apply to specific subsets, or their predictions are not formalised, or they do not provide precise confidence values for their predictions. 相似文献19.
Andrei L Lomize Irina D Pogozheva Mikhail A Lomize Henry I Mosberg 《BMC structural biology》2007,7(1):44
Background
Three-dimensional (3D) structures of numerous peripheral membrane proteins have been determined. Biological activity, stability, and conformations of these proteins depend on their spatial positions with respect to the lipid bilayer. However, these positions are usually undetermined. 相似文献20.
Anna R Paolacci Oronzo A Tanzarella Enrico Porceddu Mario Ciaffi 《BMC molecular biology》2009,10(1):11-27