Navegando por Autor "TIWARI, Sandeep"

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Acesso aberto (Open Access)
CMRegNet–An interspecies reference database for corynebacterial and mycobacterial regulatory networks
(BioMed Central Ltd, 2015-06) ABREU, Vinicius Augusto Carvalho de; ALMEIDA, Sintia Silva de; TIWARI, Sandeep; HASSAN, Syed Shah; MARIANO, Diego César Batista; SILVA, Artur Luiz da Costa da; BAUMBACH, Jan; AZEVEDO, Vasco Ariston de Carvalho; RÖTTGER, Richard
Background: Organisms utilize a multitude of mechanisms for responding to changing environmental conditions, maintaining their functional homeostasis and to overcome stress situations. One of the most important mechanisms is transcriptional gene regulation. In-depth study of the transcriptional gene regulatory network can lead to various practical applications, creating a greater understanding of how organisms control their cellular behavior. Description: In this work, we present a new database, CMRegNet for the gene regulatory networks of Corynebacterium glutamicum ATCC 13032 and Mycobacterium tuberculosis H37Rv. We furthermore transferred the known networks of these model organisms to 18 other non-model but phylogenetically close species (target organisms) of the CMNR group. In comparison to other network transfers, for the first time we utilized two model organisms resulting into a more diverse and complete network of the target organisms. Conclusion: CMRegNet provides easy access to a total of 3,103 known regulations in C. glutamicum ATCC 13032 and M. tuberculosis H37Rv and to 38,940 evolutionary conserved interactions for 18 non-model species of the CMNR group. This makes CMRegNet to date the most comprehensive database of regulatory interactions of CMNR bacteria. The content of CMRegNet is publicly available online via a web interface found at http://lgcm.icb.ufmg.br/cmregnet.
Acesso aberto (Open Access)
Complete genome sequence of Corynebacterium pseudotuberculosis biovar ovis strain P54B96 isolated from antelope in South Africa obtained by rapid next generation sequencing technology
(BioMed Central, 2012) HASSAN, Syed Shah; GUIMARÃES, Luís Carlos; PEREIRA, Ulisses de Pádua; ISLAM, Arshad; ALI, Amjad; BAKHTIAR, Syeda Marriam; RIBEIRO, Dayana; SANTOS, Anderson Rodrigues dos; SOARES, Siomar de Castro; DORELLA, Fernanda Alves; GOMIDE, Anne Cybelle Pinto; SCHNEIDER, Maria Paula Cruz; BARBOSA, Maria Silvanira Ribeiro; ALMEIDA, Sintia Silva de; ABREU, Vinicius Augusto Carvalho de; ABURJAILE, Flavia Figueira; CARNEIRO, Adriana Ribeiro; CERDEIRA, Louise Teixeira; NASCIMENTO, Karina Kelly Fiaux do; BARBOSA, Eudes Guilherme Vieira; DINIZ, Carlos Augusto Almeida; ROCHA, Flávia de Souza; RAMOS, Rommel Thiago Juca; JAIN, Neha; TIWARI, Sandeep; BARH, Debmalya; MIYOSHI, Anderson; MÜLLER, Borna; SILVA, Artur Luiz da Costa da; AZEVEDO, Vasco Ariston de Carvalho
The Actinobacteria, Corynebacterium pseudotuberculosis strain P54B96, a nonmotile, non sporulating and a mesophile bacterium, was isolated from liver, lung and mediastinal lymph node lesions in an antelope from South Africa. This strain is interesting in the sense that it has been found together with non-tuberculous mycobacteria (NTMs) which could nevertheless play a role in the lesion formation. In this work, we describe a set of features of C. pseudotuberculosis P54B96, together with the details of the complete genome sequence and annotation. The genome comprises of 2.34 Mbp long, single circular genome with 2,084 protein-coding genes, 12 rRNA, 49 tRNA and 62 pseudogenes and a G+C content of 52.19%. The analysis of the genome se quence provides means to better understanding the molecular and genetic basis of virulence of this bacterium, enabling a detailed investigation of its pathogenesis.
Acesso aberto (Open Access)
Exoproteome and Secretome Derived Broad Spectrum Novel Drug and Vaccine Candidates in Vibrio cholerae Targeted by Piper betel Derived Compounds
(Public Library of Science, 2013-01) BARH, Debmalya; SHARMA, Neha Barve; GUPTA, Krishnakant; CHANDRA, Sudha; JAIN, Neha; TIWARI, Sandeep; LEON-SICAIROS, Nidia; CANIZALEZ-ROMAN, Adrian; SANTOS, Anderson Rodrigues dos; HASSAN, Syed Shah; ALMEIDA, Sintia Silva de; RAMOS, Rommel Thiago Juca; ABREU, Vinicius Augusto Carvalho de; CARNEIRO, Adriana Ribeiro; SOARES, Siomar de Castro; CASTRO, Thiago Luiz de Paula; MIYOSHI, Anderson; SILVA, Artur Luiz da Costa da; KUMAR, Anil; NARAYAN MISRA, Amarendra; BLUM, Kenneth; BRAVERMAN, Eric R.; AZEVEDO, Vasco Ariston de Carvalho
Vibrio cholerae is the causal organism of the cholera epidemic, which is mostly prevalent in developing and underdeveloped countries. However, incidences of cholera in developed countries are also alarming. Because of the emergence of new drug resistant strains, even though several generic drugs and vaccines have been developed over time, Vibrio infections remain a global health problem that appeals for the development of novel drugs and vaccines against the pathogen. Here, applying comparative proteomic and reverse vaccinology approaches to the exoproteome and secretome of the pathogen, we have identified three candidate targets (ompU, uppP and yajC) for most of the pathogenic Vibrio strains. Two targets (uppP and yajC) are novel to Vibrio, and two targets (uppP and ompU) can be used to develop both drugs and vaccines (dual targets) against broad spectrum Vibrio serotypes. Using our novel computational approach, we have identified three peptide vaccine candidates that have high potential to induce both B- and T-cell-mediated immune responses from our identified two dual targets. These two targets were modeled and subjected to virtual screening against natural compounds derived from Piper betel. Seven compounds were identified first time from Piper betel to be highly effective to render the function of these targets to identify them as emerging potential drugs against Vibrio. Our preliminary validation suggests that these identified peptide vaccines and betel compounds are highly effective against Vibrio cholerae. Currently we are exhaustively validating these targets, candidate peptide vaccines, and betel derived lead compounds against a number of Vibrio species.
Acesso aberto (Open Access)
Genome sequence of Lactococcus lactis subsp. lactis NCDO 2118, a GABA - producing strain
(American Society for Microbiology, 2014-10) SARAIVA, Tessália Diniz Luerce; SOARES, Siomar de Castro; RAMOS, Rommel Thiago Juca; SÁ, Pablo Henrique Caracciolo Gomes de; CARNEIRO, Adriana Ribeiro; MIRANDA, Fábio Malcher; FREIRA, Matheus; RENAN, Wendal; OLIVEIRA JÚNIOR, Alberto Fernandes de; SANTOS, Anderson Rodrigues dos; GOMIDE, Anne Cybelle Pinto; SOUZA, Bianca Mendes; CASTRO, Camila Prósperi de; DINIZ, Carlos Augusto Almeida; ROCHA, Clarissa Santos; MARIANO, Diego César Batista; AGUIAR, Edgar Lacerda de; FOLADOR, Edson Luiz; BARBOSA, Eudes Guilherme Vieira; ABURJAILE, Flavia Figueira; GONÇALVES, Lucas Amorim; GUIMARÃES, Luís Carlos; AZEVEDO, Marcela; AGRESTI, Pamela Mancha; SOUZA, Renata de Faria Silva; TIWARI, Sandeep; ALMEIDA, Sintia Silva de; HASSAN, Syed Shah; PEREIRA, Vanessa Bastos; ABREU, Vinicius Augusto Carvalho de; PEREIRA, Ulisses de Pádua; DORELLA, Fernanda Alves; CARVALHO, Alex Fiorini de; PEREIRA, Felipe Luiz; LEAL, Carlos Augusto Gomes; FIGUEIREDO, Henrique Cesar Pereira; SILVA, Artur Luiz da Costa da; MIYOSHI, Anderson; AZEVEDO, Vasco Ariston de Carvalho
Lactococcus lactis subsp. lactis NCDO 2118 is a nondairy lactic acid bacterium, a xylose fermenter, and a gamma-aminobutyric acid (GABA) producer isolated from frozen peas. Here, we report the complete genome sequence of L. lactis NCDO 2118, a strain with probiotic potential activity.
Acesso aberto (Open Access)
Proteome scale comparative modeling for conserved drug and vaccine targets identification in Corynebacterium pseudotuberculosis
(BioMed Central Ltd, 2014) HASSAN, Syed Shah; TIWARI, Sandeep; GUIMARÃES, Luís Carlos; BACHA, Syed Babar Jamal; FOLADOR, Edson Luiz; SHARMA, Neha Barve; SOARES, Siomar de Castro; ALMEIDA, Sintia Silva de; ALI, Amjad; ISLAM, Arshad; PÓVOA, Fabiana Dias; ABREU, Vinicius Augusto Carvalho de; JAIN, Neha; FERREIRA, Rafaela Salgado; BHATTACHARYA, Antaripa; JUNEJA, Lucky; MIYOSHI, Anderson; SILVA, Artur Luiz da Costa da; BARH, Debmalya; TURJANSKI, Adrian Gustavo; AZEVEDO, Vasco Ariston de Carvalho
Corynebacterium pseudotuberculosis (Cp) is a pathogenic bacterium that causes caseous lymphadenitis (CLA), ulcerative lymphangitis, mastitis, and edematous to a broad spectrum of hosts, including ruminants, thereby threatening economic and dairy industries worldwide. Currently there is no effective drug or vaccine available against Cp. To identify new targets, we adopted a novel integrative strategy, which began with the prediction of the modelome (tridimensional protein structures for the proteome of an organism, generated through comparative modeling) for 15 previously sequenced C. pseudotuberculosis strains. This pan-modelomics approach identified a set of 331 conserved proteins having 95-100% intra-species sequence similarity. Next, we combined subtractive proteomics and modelomics to reveal a set of 10 Cp proteins, which may be essential for the bacteria. Of these, 4 proteins (tcsR, mtrA, nrdI, and ispH) were essential and non-host homologs (considering man, horse, cow and sheep as hosts) and satisfied all criteria of being putative targets. Additionally, we subjected these 4 proteins to virtual screening of a drug-like compound library. In all cases, molecules predicted to form favorable interactions and which showed high complementarity to the target were found among the top ranking compounds. The remaining 6 essential proteins (adk, gapA, glyA, fumC, gnd, and aspA) have homologs in the host proteomes. Their active site cavities were compared to the respective cavities in host proteins. We propose that some of these proteins can be selectively targeted using structure-based drug design approaches (SBDD). Our results facilitate the selection of C. pseudotuberculosis putative proteins for developing broad-spectrum novel drugs and vaccines. A few of the targets identified here have been validated in other microorganisms, suggesting that our modelome strategy is effective and can also be applicable to other pathogens.
Acesso aberto (Open Access)
Whole-Genome Sequence of Corynebacterium pseudotuberculosis Strain Cp162, Isolated from Camel
(American Society for Microbiology, 2012) HASSAN, Syed Shah; SCHNEIDER, Maria Paula Cruz; RAMOS, Rommel Thiago Juca; CARNEIRO, Adriana Ribeiro; LIMA, Alex Ranieri Jerônimo; GUIMARÃES, Luís Carlos; ALI, Amjad; BAKHTIAR, Syeda Marriam; PEREIRA, Ulisses de Pádua; SANTOS, Anderson Rodrigues dos; SOARES, Siomar de Castro; DORELLA, Fernanda Alves; GOMIDE, Anne Cybelle Pinto; RIBEIRO, Dayana; BARBOSA, Maria Silvanira Ribeiro; ALMEIDA, Sintia Silva de; ABREU, Vinicius Augusto Carvalho de; ABURJAILE, Flavia Figueira; NASCIMENTO, Karina Kelly Fiaux do; BARBOSA, Eudes Guilherme Vieira; DINIZ, Carlos Augusto Almeida; ROCHA, Flávia de Souza; SAXENA, Rashmi; TIWARI, Sandeep; ZAMBARE, Vasudeo; GHOSH, Preetam; PACHECO, Luis Gustavo Carvalho; DOWSON, Christopher G.; KUMAR, Anil; BARH, Debmalya; MIYOSHI, Anderson; AZEVEDO, Vasco Ariston de Carvalho; SILVA, Artur Luiz da Costa da
Corynebacterium pseudotuberculosis is a pathogen of great veterinary and economic importance, since it affects livestock, mainly sheep and goats, worldwide, together with reports of its presence in camels in several Arabic, Asiatic, and East and West African countries, as well as Australia. In this article, we report the genome sequence of Corynebacterium pseudotuberculosis strain Cp162, collected from the external neck abscess of a camel in the United Kingdom.