abstract：:Biological nitrogen fixation is a much more important process in the nitrogen cycle of the oceans than previously thought. Further, nitrogen fixation may have an influence on the capacity of the oceans to sequester carbon. A greater diversity of marine nitrogen fixers has also been uncovered but their quantitative sig...

journal_title：Current opinion in microbiology

authors： Capone DG

更新日期：2001-06-01 00:00:00

abstract：:Nucleoid proteins are a group of abundant DNA binding proteins that modulate the structure of the bacterial chromosome. They have been recruited as specific negative and positive regulators of gene transcription and their fluctuating patterns of expression are often exploited to impart an additional level of control w...

journal_title：Current opinion in microbiology

authors： McLeod SM,Johnson RC

更新日期：2001-04-01 00:00:00

abstract：:Since the publication of the complete genome sequence of Mycobacterium tuberculosis in 1998, there has been a marked intensification and diversification of activities in the field of tuberculosis research. Among the areas that have advanced spectacularly are comparative genomics, functional genomics-notably the study ...

journal_title：Current opinion in microbiology

authors： Domenech P,Barry CE 3rd,Cole ST

更新日期：2001-02-01 00:00:00

abstract：:Wild Escherichia coli are superbly adapted to survive in the intestines of their mammalian hosts and in the environment. E. coli K12 derivative (MG1655) encodes 4288 potential genes that provide the background genetic framework of this species. Particular E. coli clonal types encode additional chromosomal and extrachr...

journal_title：Current opinion in microbiology

authors： Dougan G,Haque A,Pickard D,Frankel G,O'Goara P,Wain J

更新日期：2001-02-01 00:00:00

abstract：:Associations between marine invertebrates and their cooperative bacterial symbionts offer access to an understanding of the roots of host-microbe interaction; for example, several symbioses like the squid-vibrio light organ association serve as models for investigating how each partner affects the developmental biolog...

journal_title：Current opinion in microbiology

authors： McFall-Ngai MJ,Ruby EG

更新日期：2000-12-01 00:00:00

abstract：:Biochemical, serological and microbiological methods have been used to dissect pathogens and identify the components useful for vaccine development. Although successful in many cases, this approach is time-consuming and fails when the pathogens cannot be cultivated in vitro, or when the most abundant antigens are vari...

journal_title：Current opinion in microbiology

authors： Rappuoli R

更新日期：2000-10-01 00:00:00

abstract：:Infections caused by Streptococcus pneumoniae are a major cause of morbidity and mortality in the pediatric population worldwide. Development of increasing resistance to multiple classes of antibiotics is making treatment of infections caused by this organism much more difficult. In order to prevent disease, a 23-vale...

journal_title：Current opinion in microbiology

authors： Tan TQ

更新日期：2000-10-01 00:00:00

abstract：:An understanding of the molecular bases of pathogenicity in Blastomyces dermatitidis and related systemic dimorphic fungi has been limited until recent years. Yeast cells of B. dermatitidis display an adhesion promoting protein termed WI-1. Recent studies entailing homologous gene targeting and mutation of WI-1 have p...

journal_title：Current opinion in microbiology

authors： Klein BS

更新日期：2000-08-01 00:00:00

abstract：:Molecular phylogenetic studies reveal that many endosymbioses between bacteria and invertebrate hosts result from ancient infections followed by strict vertical transmission within host lineages. Endosymbionts display a distinctive constellation of genetic properties including AT-biased base composition, accelerated s...

journal_title：Current opinion in microbiology

authors： Moran NA,Baumann P

更新日期：2000-06-01 00:00:00

abstract：:Sexual development in filamentous ascomycetes requires mating-type genes to mediate recognition of compatible cell and nuclear types. Characterization of mating-type genes from various fungi shows that they primarily encode transcriptional regulators. Recent studies on mating-type-specific pheromones and internuclear ...

journal_title：Current opinion in microbiology

authors： Shiu PK,Glass NL

更新日期：2000-04-01 00:00:00

abstract：:The DNA-binding domains of eucaryotic GATA factors comprise a four-cysteine Zn finger and an adjacent basic region. Fungal GATA factors regulate nitrogen metabolism, light induction, siderophore biosynthesis and mating-type switching. Hydrophobic interactions determine binding-site specificity. Interactions with other...

journal_title：Current opinion in microbiology

authors： Scazzocchio C

更新日期：2000-04-01 00:00:00

abstract：:Intracellular bacteria in mammalian host cells can either live in a membrane-bound vacuole modified to support bacterial growth, or escape from the primary phagosome into the host cell cytoplasm. Phagosomal escape is best studied in Listeria monocytogenes in which a pore-forming cytolysin and two phospholipases are in...

journal_title：Current opinion in microbiology

authors： Goebel W,Kuhn M

更新日期：2000-02-01 00:00:00

abstract：:Quorum sensing, or the control of gene expression in response to cell density, is used by both gram-negative and gram-positive bacteria to regulate a variety of physiological functions. In all cases, quorum sensing involves the production and detection of extracellular signalling molecules called autoinducers. While u...

journal_title：Current opinion in microbiology

authors： Bassler BL

更新日期：1999-12-01 00:00:00

abstract：:Bacterial biofilms are generally described as surface-associated bacterial communities comprising exopolysaccharide-surrounded microcolonies. Interspersed between these microcolonies are water-filled channels that may serve as primitive circulatory systems. Over the past few years, much progress has been made in our u...

journal_title：Current opinion in microbiology

authors： Pratt LA,Kolter R

更新日期：1999-12-01 00:00:00

abstract：:In the study of transmembrane transport, molecular phylogeny provides a reliable guide to protein structure, catalytic and noncatalytic transport mechanisms, mode of energy coupling and substrate specificity. It also allows prediction of the evolutionary history of a transporter family, leading to estimations of its a...

journal_title：Current opinion in microbiology

authors： Saier MH

更新日期：1999-10-01 00:00:00

abstract：:The Saccharomyces cerevisiae genome sequence, augmented by new data on gene expression and function, continues to yield new findings about eukaryote genome evolution. Analysis of the duplicate gene pairs formed by whole-genome duplication indicates that selection for increased levels of gene expression was a significa...

journal_title：Current opinion in microbiology

authors： Seoighe C,Wolfe KH

更新日期：1999-10-01 00:00:00

abstract：:Analyses of the complex regulatory networks leading to T cell survival, death, and immune deficiency have been aided in the past year by the dramatic development of new technologies to identify T cells and assess T cell function. These new techniques have shown that functional inactivation and apoptotic elimination of...

journal_title：Current opinion in microbiology

authors： Welsh RM,McNally JM

更新日期：1999-08-01 00:00:00

abstract：:Leishmania parasites are able to delay the onset of cell-mediated immunity by selectively impairing the ability of infected macrophages to produce interleukin (IL)-12. Leishmania infection arrests the JAK/STAT-mediated signal transduction involved in activation of the IL-12 p40 promoter; the phosphorylation defects ma...

journal_title：Current opinion in microbiology

authors： McDowell MA,Sacks DL

更新日期：1999-08-01 00:00:00

abstract：:Following concerns over the potential for insect resistance to insecticidal Bacillus thuringiensis toxins expressed in transgenic plants, there has been recent interest in novel biological insecticides. Over the past year there has been considerable progress in the cloning of several alternative toxin genes from the b...

journal_title：Current opinion in microbiology

authors： ffrench-Constant R,Bowen D

更新日期：1999-06-01 00:00:00

abstract：:During the past ten years, species-rich nations in the developing world have sought to capitalize on their 'biological patrimony' through a variety of business relationships with multinational corporations as a means of underwriting their conservation efforts. Initially lauded, these relationships have generated more ...

journal_title：Current opinion in microbiology

authors： Garrity GM,Hunter-Cevera J

更新日期：1999-06-01 00:00:00

abstract：:Inducible tolerance to acidic and alkaline environments is recognized as an important survival strategy for many prokaryotic and eukaryotic microorganisms. Recent developments in understanding this phenomenon include the identification of regulatory genes, specific tolerance mechanisms and genes associated with tolera...

journal_title：Current opinion in microbiology

authors： Foster JW

更新日期：1999-04-01 00:00:00

abstract：:In the past year, our knowledge of type IV transporters of Gram-negative bacteria has further expanded. Advances include the discovery of additional members of this family of proteins, increased knowledge of the morphologies of type IV transporters, and a better understanding of the mechanisms by which macromolecules ...

journal_title：Current opinion in microbiology

authors： Burns DL

更新日期：1999-02-01 00:00:00

abstract：:The emerging human pathogen Bartonella henselae has the remarkable capacity to colonise vascular tissues and to stimulate vasoproliferative tumour growth. Although the molecular principle of bacterium-induced neovascularisation (angiogenesis) is still unclear, recent studies have indicated a novel mechanism of endothe...

journal_title：Current opinion in microbiology

authors： Dehio C

更新日期：1999-02-01 00:00:00

abstract：:Recent work on cell division and chromosome orientation and partitioning in Bacillus subtilis has provided insights into cell cycle regulation during growth and development. The cell cycle is an integral part of development and entrance into sporulation is modulated by signals that transmit the status of DNA integrity...

journal_title：Current opinion in microbiology

authors： Levin PA,Grossman AD

更新日期：1998-12-01 00:00:00

abstract：:In response to starvation, myxobacteria build multicellular fruiting bodies that contain many thousands of cells and that have particular species-specific shapes. To coordinate fruiting body development, the myxobacterial cells signal to each other. The timing of and cellular responses to these signals help to give fo...

journal_title：Current opinion in microbiology

authors： Kaiser D

更新日期：1998-12-01 00:00:00

abstract：:Recent studies on antibacterials have focused on the development of antimycobacterial agents and antibacterial peptides, and on furthering the understanding of agents that have been available for several decades, including imidazoles, beta-lactams and quinolones. New areas of research include antisense oligonucleotide...

journal_title：Current opinion in microbiology

authors： Piddock LJ

更新日期：1998-10-01 00:00:00

abstract：:Trypanosomes and Leishmania contain an abundance of stage-regulated cysteine proteinases encoded by several gene families. Analysis of parasites rendered defective in cysteine proteinase function, either through genetic manipulation or through the use of specific inhibitors, has revealed roles for the enzymes in paras...

journal_title：Current opinion in microbiology

authors： Mottram JC,Brooks DR,Coombs GH

更新日期：1998-08-01 00:00:00

abstract：:There has been a dramatic increase in the number of completely sequenced bacterial genomes during the past two years as a result of the efforts both of public genome agencies and the pharmaceutical industry. The availability of completely sequenced genomes permits more systematic analyses of genes, evolution and genom...

journal_title：Current opinion in microbiology

authors： Brutlag DL

更新日期：1998-06-01 00:00:00

abstract：:The recent discovery of binding protein dependent secondary transporters and the ever-growing family of membrane potential generating secondary transporters emphasize the diversity of transport systems in both the mechanistical and physiological sense. The vast amount of data on the lactose permease is now beginning t...

journal_title：Current opinion in microbiology

authors： Lolkema JS,Poolman B,Konings WN

更新日期：1998-04-01 00:00:00

abstract：:Major advances have been made in the past five years in the identification of cellular targets of toxins produced by anaerobic bacteria. These targets include the vesicular membrane docking and fusion apparatus, the actin cytoskeleton, the signal transduction machinery and the cell membrane. The recent discovery that ...

journal_title：Current opinion in microbiology

authors： Boquet P,Munro P,Fiorentini C,Just I

更新日期：1998-02-01 00:00:00

abstract：:Just as we thought that we know everything about superantigens, new molecular and structural studies indicate that we have only just begun to unravel the secrets of these fascinating molecules. Recent structure-function analysis of superantigens from Gram-positive bacteria, with emphasis on their interaction with majo...

journal_title：Current opinion in microbiology

authors： Kotb M

更新日期：1998-02-01 00:00:00