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1.
Sci Rep ; 11(1): 16430, 2021 08 12.
Artigo em Inglês | MEDLINE | ID: mdl-34385527

RESUMO

Until there is an effective implementation of COVID-19 vaccination program, a robust testing strategy, along with prevention measures, will continue to be the most viable way to control disease spread. Such a strategy should rely on disparate diagnostic tests to prevent a slowdown in testing due to lack of materials and reagents imposed by supply chain problems, which happened at the beginning of the pandemic. In this study, we have established a single-tube test based on RT-LAMP that enables the visual detection of less than 100 viral genome copies of SARS-CoV-2 within 30 min. We benchmarked the assay against the gold standard test for COVID-19 diagnosis, RT-PCR, using 177 nasopharyngeal RNA samples. For viral loads above 100 copies, the RT-LAMP assay had a sensitivity of 100% and a specificity of 96.1%. Additionally, we set up a RNA extraction-free RT-LAMP test capable of detecting SARS-CoV-2 directly from saliva samples, albeit with lower sensitivity. The saliva was self-collected and the collection tube remained closed until inactivation, thereby ensuring the protection of the testing personnel. As expected, RNA extraction from saliva samples increased the sensitivity of the test. To lower the costs associated with RNA extraction, we performed this step using an alternative protocol that uses plasmid DNA extraction columns. We also produced the enzymes needed for the assay and established an in-house-made RT-LAMP test independent of specific distribution channels. Finally, we developed a new colorimetric method that allowed the detection of LAMP products by the visualization of an evident color shift, regardless of the reaction pH.


Assuntos
Teste para COVID-19/métodos , COVID-19/virologia , Colorimetria/métodos , Técnicas de Diagnóstico Molecular/métodos , Técnicas de Amplificação de Ácido Nucleico/métodos , SARS-CoV-2/isolamento & purificação , COVID-19/diagnóstico , Humanos , Pandemias , Portugal/epidemiologia , RNA Viral/genética , SARS-CoV-2/genética , Saliva/química , Saliva/virologia , Sensibilidade e Especificidade
2.
Microorganisms ; 9(6)2021 Jun 20.
Artigo em Inglês | MEDLINE | ID: mdl-34203091

RESUMO

In yeast, iron storage and detoxification depend on the Ccc1 transporter that mediates iron accumulation in vacuoles. While deletion of the CCC1 gene renders cells unable to survive under iron overload conditions, the deletion of its previously identified regulators only partially affects survival, indicating that the mechanisms controlling iron storage and detoxification in yeast are still far from well understood. This work reveals that CCC1 is equipped with a complex transcriptional structure comprising several regulatory regions. One of these is located inside the coding sequence of the gene and drives the expression of a short transcript encoding an N-terminally truncated protein, designated as s-Ccc1. s-Ccc1, though less efficiently than Ccc1, is able to promote metal accumulation in the vacuole, protecting cells against iron toxicity. While the expression of the s-Ccc1 appears to be repressed in the normal genomic context, our current data clearly demonstrates that it is functional and has the capacity to play a role under iron overload conditions.

3.
Microb Cell ; 6(6): 267-285, 2019 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-31172012

RESUMO

Yeast adaptation to stress has been extensively studied. It involves large reprogramming of genome expression operated by many, more or less specific, transcription factors. Here, we review our current knowledge on the function of the eight Yap transcription factors (Yap1 to Yap8) in Saccharomyces cerevisiae, which were shown to be involved in various stress responses. More precisely, Yap1 is activated under oxidative stress, Yap2/Cad1 under cadmium, Yap4/Cin5 and Yap6 under osmotic shock, Yap5 under iron overload and Yap8/Arr1 by arsenic compounds. Yap3 and Yap7 seem to be involved in hydroquinone and nitrosative stresses, respectively. The data presented in this article illustrate how much knowledge on the function of these Yap transcription factors is advanced. The evolution of the Yap family and its roles in various pathogenic and non-pathogenic fungal species is discussed in the last section.

4.
FEBS J ; 285(10): 1861-1872, 2018 05.
Artigo em Inglês | MEDLINE | ID: mdl-29604179

RESUMO

In the yeast Saccharomyces cerevisiae Aft1, the low iron-sensing transcription factor is known to regulate the expression of the FET3 gene. However, we found that a strain-lacking FET3 is more sensitive to copper excess than a strain-lacking AFT1, and accordingly, FET3 expression is not fully compromised in the latter. These findings suggest that, under such conditions, another regulator comes into play and controls FET3 expression. In this work, we identify Ace1, the regulator of copper detoxification genes, as a regulator of FET3. We suggest that the activation of FET3 by Ace1 prevents the hyper activation of Aft1, possibly by assuring the adequate functioning of mitochondrial iron-sulfur cluster biogenesis. While reinforcing the link between iron and copper homeostasis, this work unveils a novel protection mechanism against copper toxicity mediated by Ace1, which relies in the activation of FET3 and results in the restriction of Aft1 activity as a means to prevent excessive copper accumulation.


Assuntos
Ceruloplasmina/metabolismo , Cobre/metabolismo , Proteínas de Ligação a DNA/fisiologia , Inativação Metabólica/genética , Proteínas de Saccharomyces cerevisiae/metabolismo , Proteínas de Saccharomyces cerevisiae/fisiologia , Saccharomyces cerevisiae/metabolismo , Fatores de Transcrição/metabolismo , Fatores de Transcrição/fisiologia , Ceruloplasmina/genética , Cobre/toxicidade , Regulação Fúngica da Expressão Gênica , Genes Fúngicos , Homeostase , Ferro/metabolismo , Saccharomyces cerevisiae/genética , Proteínas de Saccharomyces cerevisiae/genética
5.
Biochim Biophys Acta Gene Regul Mech ; 1860(4): 472-481, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-28188921

RESUMO

Response to arsenic stress in Saccharomyces cerevisiae is orchestrated by the regulatory protein Yap8, which mediates transcriptional activation of ACR2 and ACR3. This study contributes to the state of art knowledge of the molecular mechanisms underlying yeast stress response to arsenate as it provides the genetic and biochemical evidences that Yap8, through cysteine residues 132, 137, and 274, is the sensor of presence of arsenate in the cytosol. Moreover, it is here reported for the first time the essential role of the Mediator complex in the transcriptional activation of ACR2 by Yap8. Based on our data, we propose an order-of-function map to recapitulate the sequence of events taking place in cells injured with arsenate. Modification of the sulfhydryl state of these cysteines converts Yap8 in its activated form, triggering the recruitment of the Mediator complex to the ACR2/ACR3 promoter, through the interaction with the tail subunit Med2. The Mediator complex then transfers the regulatory signals conveyed by Yap8 to the core transcriptional machinery, which culminates with TBP occupancy, ACR2 upregulation and cell adaptation to arsenate stress. Additional co-factors are required for the transcriptional activation of ACR2 by Yap8, particularly the nucleosome remodeling activity of SWI/SNF and SAGA complexes.


Assuntos
Arseniato Redutases/genética , Arseniatos/toxicidade , Fatores de Transcrição de Zíper de Leucina Básica/metabolismo , Complexo Mediador/metabolismo , Complexos Multiproteicos/metabolismo , Proteínas de Saccharomyces cerevisiae/metabolismo , Saccharomyces cerevisiae/metabolismo , Ativação Transcricional/genética , Arseniato Redutases/metabolismo , Fatores de Transcrição de Zíper de Leucina Básica/química , Cisteína/metabolismo , Regiões Promotoras Genéticas , Ligação Proteica , Subunidades Proteicas/metabolismo , Proteínas de Saccharomyces cerevisiae/química , Proteínas de Saccharomyces cerevisiae/genética , Estresse Fisiológico/efeitos dos fármacos
6.
Biochim Biophys Acta ; 1849(12): 1385-97, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26470684

RESUMO

Response to hyperosmotic stress in the yeast Saccharomyces cerevisiae involves the participation of the general stress response mediated by Msn2/4 transcription factors and the HOG pathway. One of the transcription factors activated through this pathway is Hot1, which contributes to the control of the expression of several genes involved in glycerol synthesis and flux, or in other functions related to adaptation to adverse conditions. This work provides new data about the interaction mechanism of this transcription factor with DNA. By means of one-hybrid and electrophoretic mobility assays, we demonstrate that the C-terminal region, which corresponds to amino acids 610-719, is the DNA-binding domain of Hot1. We also describe how this domain recognizes sequence 5'-GGGACAAA-3' located in the promoter of gene STL1. The bioinformatics analysis carried out in this work allowed the identification of identical or similar sequences (with up to two mismatches) in the promoter of other Hot1 targets, where central element GGACA was quite conserved among them. Finally, we found that small variations in the sequence recognized by Hot1 may influence its ability to recognize its targets in vivo.


Assuntos
DNA Fúngico/metabolismo , Regulação Fúngica da Expressão Gênica , Proteínas de Membrana Transportadoras/genética , Regiões Promotoras Genéticas/genética , Proteínas de Saccharomyces cerevisiae/genética , Proteínas de Saccharomyces cerevisiae/metabolismo , Saccharomyces cerevisiae/genética , Fatores de Transcrição/metabolismo , Sequência de Aminoácidos , Sequência de Bases , Sítios de Ligação , Simulação por Computador , Sequência Conservada , DNA Fúngico/genética , Genes Fúngicos , Dados de Sequência Molecular , Mutação , Osmorregulação/genética , Ligação Proteica , Estrutura Terciária de Proteína , Proteínas Recombinantes de Fusão/metabolismo , Saccharomyces cerevisiae/metabolismo , Alinhamento de Sequência , Deleção de Sequência , Homologia de Sequência de Aminoácidos
7.
FEBS Open Bio ; 5: 594-604, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26273559

RESUMO

Desulfovibrio gigas belongs to the group of sulfate reducing bacteria (SRB). These ubiquitous and metabolically versatile microorganisms are often exposed to reactive nitrogen species (RNS). Nonetheless, the mechanisms and regulatory elements involved in nitrosative stress protection are still poorly understood. The transcription factor HcpR has emerged as a putative regulator of nitrosative stress response among anaerobic bacteria. HcpR is known to orchestrate the expression of the hybrid cluster protein gene, hcp, proposed to be involved in cellular defense against RNS. According to phylogenetic analyses, the occurrence of hcpR paralog genes is a common feature among several Desulfovibrio species. Within the D. gigas genome we have identified two HcpR-related sequences. One of these sequences, hcpR1, was found in the close vicinity of the hcp gene and this finding prompted us to proceed with its functional characterization. We observed that the growth of a D. gigas strain lacking hcpR1 is severely impaired under nitrosative stress. An in silico search revealed several putative targets of HcpR1 that were experimentally validated. The fact that HcpR1 regulates several genes encoding proteins involved in nitrite and nitrate metabolism, together with the sensitive growth phenotype to NO displayed by an hcpR1 mutant strain, strongly supports a relevant role of this factor under nitrosative stress. Moreover, the finding that several Desulfovibrio species possess HcpR paralogs, which have been transmitted vertically in the evolution and diversification of the genus, suggests that these sequences may confer adaptive or survival advantage to these organisms, possibly by increasing their tolerance to nitrosative stress.

8.
FEBS Lett ; 589(19 Pt B): 2841-9, 2015 Sep 14.
Artigo em Inglês | MEDLINE | ID: mdl-26296316

RESUMO

Yap2 is a cadmium responsive transcription factor that interacts with MAPK-activated protein (MAPKAP) kinase Rck1. We show that Rck1 deletion confers protection against cadmium toxicity and that the mechanism underlying this observation relies on Yap2. Rck1 removal from the yeast genome potentiates Yap2 activity by increasing protein half-life and delaying its nuclear export. As a consequence, several Yap2 antioxidant targets are over-activated by a mechanism that also requires Yap1. Several genes of the cell wall integrity (CWI) pathway are upregulated under cadmium stress in a Yap2 dependent way. We showed that deletion of CWI genes renders yeast cells more sensitive to cadmium. These findings led us to suggest that in response to cadmium stress Yap2 may serve a dual purpose: oxidative stress attenuation and cell wall maintenance.


Assuntos
Cádmio/toxicidade , Poluentes Ambientais/toxicidade , Proteínas Serina-Treonina Quinases/metabolismo , Proteínas de Saccharomyces cerevisiae/antagonistas & inibidores , Proteínas de Saccharomyces cerevisiae/metabolismo , Saccharomyces cerevisiae/efeitos dos fármacos , Saccharomyces cerevisiae/metabolismo , Fatores de Transcrição/antagonistas & inibidores , Fatores de Transcrição/metabolismo , Transporte Ativo do Núcleo Celular/efeitos dos fármacos , Antioxidantes/metabolismo , Núcleo Celular/efeitos dos fármacos , Núcleo Celular/metabolismo , Parede Celular/efeitos dos fármacos , Parede Celular/genética , Regulação Fúngica da Expressão Gênica/efeitos dos fármacos , Mutação , Estresse Oxidativo/efeitos dos fármacos , Estabilidade Proteica/efeitos dos fármacos , Proteínas Serina-Treonina Quinases/genética , Saccharomyces cerevisiae/citologia , Saccharomyces cerevisiae/fisiologia , Proteínas de Saccharomyces cerevisiae/genética
9.
J Biol Chem ; 290(30): 18584-95, 2015 Jul 24.
Artigo em Inglês | MEDLINE | ID: mdl-26063801

RESUMO

Cadmium is a well known mutagenic metal that can enter cells via nonspecific metal transporters, causing several cellular damages and eventually leading to death. In the yeast Saccharomyces cerevisiae, the transcription factor Yap1 plays a key role in the regulation of several genes involved in metal stress response. We have previously shown that Yap1 represses the expression of FET4, a gene encoding a low affinity iron transporter able to transport metals other than iron. Here, we have studied the relevance of this repression in cell tolerance to cadmium. Our results indicate that genomic deletion of Yap1 increases FET4 transcript and protein levels. In addition, the cadmium toxicity exhibited by this strain is completely reversed by co-deletion of FET4 gene. These data correlate well with the increased intracellular levels of cadmium observed in the mutant yap1. Rox1, a well known aerobic repressor of hypoxic genes, conveys the Yap1-mediated repression of FET4. We further show that, in a scenario where the activity of Yap1 or Rox1 is compromised, cells activate post-transcriptional mechanisms, involving the exoribonuclease Xrn1, to compensate the derepression of FET4. Our data thus reveal a novel protection mechanism against cadmium toxicity mediated by Yap1 that relies on the aerobic repression of FET4 and results in the impairment of cadmium uptake.


Assuntos
Cádmio/metabolismo , Proteínas de Transporte de Cátions/biossíntese , Proteínas de Ligação ao Ferro/biossíntese , Proteínas Repressoras/metabolismo , Proteínas de Saccharomyces cerevisiae/biossíntese , Proteínas de Saccharomyces cerevisiae/metabolismo , Estresse Fisiológico/genética , Fatores de Transcrição/metabolismo , Transporte Biológico/genética , Cádmio/toxicidade , Proteínas de Transporte de Cátions/genética , Proteínas de Transporte de Cátions/metabolismo , Proteínas de Transporte de Cobre , Proteínas de Ligação a DNA/genética , Proteínas de Ligação a DNA/metabolismo , Exorribonucleases/metabolismo , Regulação Fúngica da Expressão Gênica , Ferro/metabolismo , Proteínas de Ligação ao Ferro/genética , Proteínas de Ligação ao Ferro/metabolismo , Mutação , Proteínas Repressoras/genética , Saccharomyces cerevisiae , Proteínas de Saccharomyces cerevisiae/genética , Fatores de Transcrição/genética
10.
PLoS One ; 8(12): e83328, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24358276

RESUMO

In Saccharomyces cerevisiae, the transcription factor Yap8 is a key determinant in arsenic stress response. Contrary to Yap1, another basic region-leucine zipper (bZIP) yeast regulator, Yap8 has a very restricted DNA-binding specificity and only orchestrates the expression of ACR2 and ACR3 genes. In the DNA-binding basic region, Yap8 has three distinct amino acids residues, Leu26, Ser29 and Asn31, at sites of highly conserved positions in the other Yap family of transcriptional regulators and Pap1 of Schizosaccharomyces pombe. To evaluate whether these residues are relevant to Yap8 specificity, we first built a homology model of the complex Yap8bZIP-DNA based on Pap1-DNA crystal structure. Several Yap8 mutants were then generated in order to confirm the contribution of the residues predicted to interact with DNA. Using bioinformatics analysis together with in vivo and in vitro approaches, we have identified several conserved residues critical for Yap8-DNA binding. Moreover, our data suggest that Leu26 is required for Yap8 binding to DNA and that this residue together with Asn31, hinder Yap1 response element recognition by Yap8, thus narrowing its DNA-binding specificity. Furthermore our results point to a role of these two amino acids in the stability of the Yap8-DNA complex.


Assuntos
Fatores de Transcrição de Zíper de Leucina Básica/química , Fatores de Transcrição de Zíper de Leucina Básica/metabolismo , DNA/metabolismo , Domínios e Motivos de Interação entre Proteínas , Proteínas de Saccharomyces cerevisiae/química , Proteínas de Saccharomyces cerevisiae/metabolismo , Sequência de Aminoácidos , Fatores de Transcrição de Zíper de Leucina Básica/genética , Sequência Conservada , Proteínas de Ligação a DNA/química , Proteínas de Ligação a DNA/genética , Proteínas de Ligação a DNA/metabolismo , Modelos Moleculares , Dados de Sequência Molecular , Proteínas Associadas a Pancreatite , Ligação Proteica , Domínios e Motivos de Interação entre Proteínas/genética , Elementos de Resposta , Saccharomyces cerevisiae/genética , Saccharomyces cerevisiae/metabolismo , Proteínas de Saccharomyces cerevisiae/genética , Schizosaccharomyces/genética , Schizosaccharomyces/metabolismo , Homologia de Sequência , Fatores de Transcrição/genética
12.
Yeast ; 26(12): 641-53, 2009 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19774548

RESUMO

Yap4 is a nuclear-resident transcription factor induced in Saccharomyces cerevisiae when exposed to several stress conditions, which include mild hyperosmotic and oxidative stress, temperature shift or metal exposure. This protein is also phosphorylated. Here we report that this modification is driven by PKA and GSK3. In order to ascertain whether Yap4 is directly or indirectly phosphorylated by PKA, we searched for stress and PKA-related kinases that could phosphorylate Yap4. We show that phosphorylation is independent of the kinases Rim15, Yak1, Sch9, Slt2, Ste20 and Ptk2. In addition, we showed that Yap4 phosphorylation is also abrogated in the triple GSK3 mutant mck1 rim11 yol128c. Furthermore, our data reveal that Yap4 nuclear localization is independent of its phosphorylation state. This protein has several putative phosphorylation sites, but only the mutation of residues T192 and S196 impairs its phosphorylation under different stress conditions. The ability of the non-phosphorylated forms of Yap4 to partially rescue the hog1 severe sensitivity phenotype is not affected, suggesting that Yap4 activity is maintained in the absence of phosphorylation. However, this modification seems to be required for stability of the protein, as the non-phosphorylated form has a shorter half-life than the phosphorylated one.


Assuntos
Proteínas Quinases Dependentes de AMP Cíclico/metabolismo , Quinase 3 da Glicogênio Sintase/metabolismo , Proteínas Nucleares/metabolismo , Proteínas de Saccharomyces cerevisiae/metabolismo , Saccharomyces cerevisiae/metabolismo , Fatores de Transcrição/metabolismo , Substituição de Aminoácidos , Sequência de Bases , Sítios de Ligação/genética , Núcleo Celular/metabolismo , Proteínas Quinases Dependentes de AMP Cíclico/genética , Primers do DNA/genética , Genes Fúngicos , Quinase 3 da Glicogênio Sintase/genética , Mutagênese Sítio-Dirigida , Mutação , Proteínas Nucleares/química , Proteínas Nucleares/genética , Fosforilação , Estabilidade Proteica , Proteínas Recombinantes/química , Proteínas Recombinantes/genética , Proteínas Recombinantes/metabolismo , Saccharomyces cerevisiae/genética , Proteínas de Saccharomyces cerevisiae/química , Proteínas de Saccharomyces cerevisiae/genética , Estresse Fisiológico , Fatores de Transcrição/química , Fatores de Transcrição/genética
13.
Biochem J ; 414(2): 301-11, 2008 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-18439143

RESUMO

In the budding yeast Saccharomyces cerevisiae, arsenic detoxification involves the activation of Yap8, a member of the Yap (yeast AP-1-like) family of transcription factors, which in turn regulates ACR2 and ACR3, genes encoding an arsenate reductase and a plasma-membrane arsenite-efflux protein respectively. In addition, Yap1 is involved in the arsenic adaptation process through regulation of the expression of the vacuolar pump encoded by YCF1 (yeast cadmium factor 1 gene) and also contributing to the regulation of ACR genes. Here we show that Yap1 is also involved in the removal of ROS (reactive oxygen species) generated by arsenic compounds. Data on lipid peroxidation and intracellular oxidation indicate that deletion of YAP1 and YAP8 triggers cellular oxidation mediated by inorganic arsenic. In spite of the increased amounts of As(III) absorbed by the yap8 mutant, the enhanced transcriptional activation of the antioxidant genes such as GSH1 (gamma- glutamylcysteine synthetase gene), SOD1 (superoxide dismutase 1 gene) and TRX2 (thioredoxin 2 gene) may prevent protein oxidation. In contrast, the yap1 mutant exhibits high contents of protein carbonyl groups and the GSSG/GSH ratio is severely disturbed on exposure to arsenic compounds in these cells. These results point to an additional level of Yap1 contribution to arsenic stress responses by preventing oxidative damage in cells exposed to these compounds. Transcriptional profiling revealed that genes of the functional categories related to sulphur and methionine metabolism and to the maintenance of cell redox homoeostasis are activated to mediate adaptation of the wild-type strain to 2 mM arsenate treatment.


Assuntos
Arsênio/farmacologia , Proteínas de Saccharomyces cerevisiae/fisiologia , Saccharomyces cerevisiae/efeitos dos fármacos , Fatores de Transcrição/fisiologia , Fatores de Transcrição de Zíper de Leucina Básica/genética , Fatores de Transcrição de Zíper de Leucina Básica/metabolismo , Fatores de Transcrição de Zíper de Leucina Básica/fisiologia , Northern Blotting , Western Blotting , Regulação Fúngica da Expressão Gênica/efeitos dos fármacos , Glutamato-Cisteína Ligase/genética , Glutamato-Cisteína Ligase/metabolismo , Glutationa/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Microscopia de Fluorescência , Análise de Sequência com Séries de Oligonucleotídeos , Estresse Oxidativo , Espécies Reativas de Oxigênio/metabolismo , Saccharomyces cerevisiae/genética , Saccharomyces cerevisiae/metabolismo , Proteínas de Saccharomyces cerevisiae/genética , Proteínas de Saccharomyces cerevisiae/metabolismo , Tiorredoxinas/genética , Tiorredoxinas/metabolismo , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo
14.
FEBS Lett ; 566(1-3): 141-6, 2004 May 21.
Artigo em Inglês | MEDLINE | ID: mdl-15147884

RESUMO

Yap8p, a member of the Saccharomyces cerevisiae Yap family, is activated in response to arsenic. Both the mechanisms by which this activation takes place and its regulation have not yet been identified. In this report, we show that Yap8p is not activated at the transcriptional level but, rather, its nuclear transport is actively regulated and dependent on the exportin chromosome region maintenance protein. In addition, it is shown that Cys(132), Cys(137)and Cys(274) are essential for Yap8p localization and transactivation function both of which are required for its biological activity.


Assuntos
Arsênio/farmacologia , Proteínas de Saccharomyces cerevisiae/metabolismo , Saccharomyces cerevisiae/metabolismo , Fatores de Transcrição/metabolismo , Transporte Ativo do Núcleo Celular , Sequência de Aminoácidos , Substituição de Aminoácidos , Northern Blotting , Proteínas de Transporte/metabolismo , Núcleo Celular/metabolismo , Cisteína/genética , Deleção de Genes , Genótipo , Microscopia de Fluorescência , Dados de Sequência Molecular , Fenótipo , Proteínas Recombinantes/genética , Proteínas Recombinantes/metabolismo , Saccharomyces cerevisiae/efeitos dos fármacos , Saccharomyces cerevisiae/genética , Saccharomyces cerevisiae/crescimento & desenvolvimento , Proteínas de Saccharomyces cerevisiae/genética , Fatores de Transcrição/genética , Ativação Transcricional/efeitos dos fármacos
15.
FEBS Lett ; 567(1): 80-5, 2004 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-15165897

RESUMO

Yeast, and especially Saccharomyces cerevisiae, are continuously exposed to rapid and drastic changes in their external milieu. Therefore, cells must maintain their homeostasis, which is achieved through a highly coordinated gene expression involving a plethora of transcription factors, each of them performing specific functions. Here, we discuss recent advances in our understanding of the function of the yeast activator protein family of eight basic-leucine zipper trans-activators that have been implicated in various forms of stress response.


Assuntos
Proteínas Fúngicas/fisiologia , Estresse Oxidativo , Sequência de Aminoácidos , Proteínas Fúngicas/química , Regulação Fúngica da Expressão Gênica , Modelos Biológicos , Dados de Sequência Molecular , Família Multigênica , Pressão Osmótica , Saccharomyces cerevisiae/metabolismo , Saccharomyces cerevisiae/fisiologia , Proteínas de Saccharomyces cerevisiae/metabolismo , Homologia de Sequência de Aminoácidos , Fatores de Transcrição/metabolismo
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