Search results for "promoters"

Expanding the toolbox for Synechocystis sp. PCC 6803 : validation of replicative vectors and characterization of a novel set of promoters

2018

Cyanobacteria are promising ‘low-cost’ cell factories since they have minimal nutritional requirements, high metabolic plasticity and can use sunlight and CO2 as energy and carbon sources. The unicellular Synechocystis sp. PCC 6803, already considered the ‘green’ Escherichia coli, is the best studied cyanobacterium but to be used as an efficient and robust photoautotrophic chassis it requires a customized and well-characterized toolbox. In this context, we evaluated the possibility of using three self-replicative vectors from the Standard European Vector Architecture (SEVA) repository to transform Synechocystis. Our results demonstrated that the presence of the plasmid does not lead to an e…

The Expression of NOX From Synthetic Promoters Reveals an Important Role of the Redox Status in Regulating Secondary Metabolism of

2020

Redox cofactors play a pivotal role in primary cellular metabolism, whereas the clear link between redox status and secondary metabolism is still vague. In this study we investigated effects of redox perturbation on the production of erythromycin in Saccharopolyspora erythraea by expressing the water-forming NADH oxidase (NOX) from Streptococcus pneumonia at different levels with synthetic promoters. The expression of NOX reduced the intracellular [NADH]/[NAD+] ratio significantly in S. erythraea which resulted in an increased production of erythromycin by 19∼29% and this increment rose to 60% as more oxygen was supplied. In contrast, the lower redox ratio resulted in a decreased production…

Green composites: A brief review

2011

The rising concern towards environmental issues and, on the other hand, the need for more versatile polymer-based materials has led to increasing interest about polymer composites filled with natural-organic fillers, i.e. fillers coming from renewable sources and biodegradable. The composites, usually referred to as "green", can find several industrial applications. On the other hand, some problems exist, such as worse processability and reduction of the ductility. The use of adhesion promoters, additives or chemical modification of the filler can help in overcoming many of these limitations. These composites can be further environment-friendly when the polymer matrix is biodegradable and c…

Experimental investigation of the effects of efficiency promoters in a MSF lab-scale unit

2006

Phosphate-controlled regulator for the biosynthesis of the dalbavancin precursor A40926

2007

ABSTRACT The actinomycete Nonomuraea sp. strain ATCC 39727 produces the glycopeptide A40926, the precursor of the novel antibiotic dalbavancin. Previous studies have shown that phosphate limitation results in enhanced A40926 production. The A40926 biosynthetic gene ( dbv ) cluster, which consists of 37 genes, encodes two putative regulators, Dbv3 and Dbv4, as well as the response regulator (Dbv6) and the sensor-kinase (Dbv22) of a putative two-component system. Reverse transcription-PCR (RT-PCR) and real-time RT-PCR analysis revealed that the dbv14 - dbv8 and the dbv30 - dbv35 operons, as well as dbv4 , were negatively influenced by phosphate. Dbv4 shows a putative helix-turn-helix DNA-bind…

How to make people become Ambassadors of Jazz - A Comparative Case Study of Voluntary Jazz Concert Promoters in Agder

2018

Master's thesis Music Management MU501 - University of Agder 2018 This study observes the comparative cases of two jazz clubs in the region of Agder, South of Norway. The cases investigated are the Non-Profit Organisations (NPOs) and voluntary associations (VOs); Kristiansand Jazzvesen (KJV) and Arendal Jazzklubb (AJ), that has slightly different organisational structures and environments. The main objective has been to unveil if there is a need for ambassadors of jazz, or jazz enthusiasts, in order for these jazz concert promoters to ‘thrive’, improve their live jazz concert experiences and recruit new volunteers. Then, how this can be achieved in a fast-changing digitalised “festivalised”…

Plant Growth-Promoting Activities of Bacteria Isolated from an Anthropogenic Soil Located in Agrigento Province

2022

Bacteria producers of plant growth-promoting (PGP) substances are responsible for the enhancement of plant development through several mechanisms. The purpose of the present work was to evaluate the PGP traits of 63 bacterial strains that were isolated from an anthropogenic soil, and obtained by modification of vertisols in the Sicily region (Italy) seven years after creation. The microorganisms were tested for the following PGP characteristics: indole acetic acid (IAA), NH3, HCN and siderophore production, 1-aminocyclopropane-1-carboxylate deaminase activity (ACC) and phosphate solubilization. The results of principal component analysis (PCA) showed that Bacillus tequilensis SI 319, Brevib…

Psychiatric genome-wide association study analyses implicate neuronal, immune and histone pathways

2015

G.B. and S.N. acknowledge funding support for this work from the National Institute for Health Research (NIHR) Mental Health Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and King's College London. P.H.L. is supported by US National Institute of Mental Health (NIMH) grant K99MH101367. Genome-wide association studies (GWAS) of psychiatric disorders have identified multiple genetic associations with such disorders, but better methods are needed to derive the underlying biological mechanisms that these signals indicate. We sought to identify biological pathways in GWAS data from over 60,000 participants from the Psychiatric Genomics Consortium. We developed an an…

PSMA6 gēna promotera poliadenozīna trakta polimorfismu asociācija ar bronhiālo astmu, aptaukošanos un 1. tipa cukura diabētu Latvijas populācijā

2015

Ubikitīna – proteasomu sistēma ir multienzīmatisks proteāžu komplekss, kas regule dažādus šūnu procesus. Šis sistēmas disregulācija var būt iesaistīta tādos cilvēka patoloģiju rašanās mehanismos kā 2. tipa cukura diabēts, juvenīlais idiopātiskais artrīts un Greivsa slimība. Tas var būt atkarīgs no proteasomas gēnu strukturālām pārmaiņām, kuri kodē proteasomu apakšvienības. Šajā pētījumā mēs analizējam asociāciju starp PSMA6 gēna promotera poly(A) (c. –655 An) mikrosatelīta garuma izmaiņām un bronhiālo astmu (BA), 1. tipa cukura diabētu (T1DM) un aptaukošanos (APT) Latvijas populācijā. PSMA6 gēna poly(A) polimorfisms tika analizēts ar gadījuma / kontroles pētījumu un bioinformātiskām program…

Promoção da saúde: O renascimento de uma ideologia

2004

A concepção actual de promoção de saúde, educação para a saúde e prevenção da doença é suportada por ideologias algo adulteradas pela realidade social. Tendo em conta a proliferação epistemológica destes conceitos no final do século XX pretende-se, no presente artigo, elaborar uma reflexão crítica em torno das múltiplas racionalidades estratégicas em que os conceitos se organizam, bem como, abordar os paradoxos que se instalam ao nível dos determinantes biopsicossociais dos comportamentos salutogénicos. Partilhando responsabilidades, os profissionais de saúde, devem, colectiva e proactivamente, desempenhar um papel significativo como promotores de saúde, modelando e reforçando o significado…