
Wilson TeranPontifical Xavierian University · Department of Biology
Wilson Teran
PhD
About
31
Publications
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Introduction
I am interested in deciphering regulatory aspects controlling biological responses to different environmental stimuli and stresses, addressing related biological questions from a molecular, biochemical and genomic point of view. Generating knowledge on these regulatory elements, parts and networks should significantly contribute to biotechnological aplications
Our current research projects are aimed at studying plant stress biology, xylem formation and metabolic diversity in tropical crops
Additional affiliations
March 2006 - present
March 2006 - present
Universidad Javeriana
Position
- Professor (Associate)
Position
- internship
Publications
Publications (31)
Pseudomonas putida is well known for its metabolic capabilities, but recently, it has been shown to exhibit resistance to a wide range of antibiotics.
In P. putida DOT-T1E, the TtgABC efflux pump, which has a broad substrate specificity, extrudes antibiotics such as ampicillin, carbenicillin,
tetracycline, nalidixic acid, and chloramphenicol. We ha...
We have developed a general profile for the proteins of the TetR family of repressors. The stretch that best defines the profile of this family is made up of 47 amino acid residues that correspond to the helix-turn-helix DNA binding motif and adjacent regions in the three-dimensional structures of TetR, QacR, CprB, and EthR, four family members for...
Antibiotic resistance is a widely spread phenomenon. One major mechanism that underlies antibiotic resistance in bacteria is the active extrusion of toxic compounds through the membrane-bound efflux pumps that are often regulated at the transcriptional level. TtgR represses the transcription of TtgABC, a key efflux pump in Pseudomonas putida, which...
TtgR is the specific transcriptional repressor of the TtgABC efflux pump. TtgR and the TtgB efflux pump proteins possess multidrug-binding capacity, and their concerted action is responsible for the multidrug resistance phenotype of Pseudomonas putida DOT-T1E. TtgR binds to a pseudo-palindromic site that overlaps the ttgR/ttgA promoters. Dimethylsu...
Antecedentes: El cacao es un cultivo del neotrópico de importancia económica mundial, de uso ancestral en las culturas precolombinas. Se considera una especie de sombra, aunque algunos genotipos híbridos pueden crecer a plena exposición solar. Esta capacidad de tolerar diferentes niveles de luz varía, pudiendo aprovecharse para optimizar el rendimi...
Viruses are among the most abundant biological entities in the ocean, largely responsible of modulating nutrients fluxes and influencing microbial composition and functioning. In marine invertebrate holobionts like sponges and their associated microbiomes, little is known about virome composition. Here, we characterized the Haliclona fulva hologeno...
The increase in events associated with drought constraints plant growth and crop performance. Cacao (Theobroma cacao L.) is sensitive to water deficit stress (DS), which limits productivity. The aim of this research was to characterise the response of seven (CCN51, FEAR5, ICS1, ICS60, ICS95, EET8, and TSH565) commercially important cacao clones to...
Background
Gmelina arborea Roxb is a fast-growing tree species of commercial importance for tropical countries due to multiple industrial uses of its wood. Wood is primarily composed of thick secondary cell walls of xylem cells which imparts the strength to the wood. Identification of the genes involved in the secondary cell wall biosynthesis as we...
The nitrated compounds 2,4-dinitrotoluene (2,4-DNT), 2,4,6-trinitrotoluene (TNT), and pentaerythritol tetranitrate (PETN) are toxic xenobiotics widely used in various industries. They often coexist as environmental contaminants. The aims of this study were to evaluate the transformation of 100 mg L⁻¹ of TNT, 2,4-DNT, and PETN by Raoultella plantico...
In Colombia, identification of entomopathogenic nematodes (EPN's) native species is of great importance for pest management programs. The aim of this study was to isolate and identify EPNs and their bacterial symbiont in the department of Cauca-Colombia and then evaluate the susceptibility of two Hass avocado (Persea americana) pests to the EPNs is...
La melina es una especie forestal con una alta calidad maderable y de importancia económica para diferentes países tropicales como Colombia. No obstante, existe poca información acerca de su genética, lo cual es pertinente en programas de mejoramiento. Con el fin de determinar el tamaño del genoma de Gmelina arborea (valor C), se obtuvieron suspens...
Heterorhabditis indica SL0708 is an entomopathogenic nematode isolated from Valle del Cauca-Colombia, whose bacterial symbiont, Photorhabdus luminescens subsp. akhurstii SL0708, has potential to control pests of economic importance in Colombia. Since in vivo production does not supply its demand, this investigation evaluated H. indica SL0708 produc...
Entomopathogenic nematodes are key players for insect pest control and constitute an environmentally friendly alternative for crop protection. The insecticidal activity of the family Heterorhabditidae relies on a tight symbiotic relationship with enterobacteria of the genus Photorhabdus, where the bacterial contribution towards the death of the hos...
Colombia, as well as many tropical countries, has experienced severe deforestation in the last decades, and millions of acres of native forest areas (F) have been replaced by conventional monoculture pastures (CP), contributing to ecological and soil degradation. In response, multi-canopy intensive silvopastoral systems (ISS), which includes herbs,...
Livestock production in Latin America has replaced tropical dry forests with conventional monocultures
pastures (CP) that have degraded soils. As an alternative to CP, intensive silvopastoral systems (ISS) have
been developed with multi-canopied vegetation that mimics native forest (F). The litter inputs and yearround
presence of the tree rhizosphe...
Extensive cattle production occupies more than 27% of the rural landscapes in Latin America, and nowadays is considered as a major driver of tropical deforestation. Conventional monoculture pasture (CP) systems have degraded soils and caused negative environmental impacts. Recent years have shown increasing interest in the development of alternativ...
Isothermal Titration Calorimetry (ITC) is a general technique to characterize binding thermodynamics between two ligands. A single ITC experiment permits the determination of the binding constant, the changes in enthalpy (ΔH o), entropy (ΔS o) and Gibbs free energy (ΔG o). Advantage of ITC over alternative techniques include that almost any type of...
Objective. To evaluate through RAM (Random Amplified Microsatellites) molecular markers the genetic diversity of cultivated materials of gulupa (Passiflora edulis f. edulis), collected in the departments of Boyacá, Cundinamarca and Huila. Materials and methods. Young and healthy leaves were collected from crop fields of gulupa for DNA extraction an...
Extensive cattle production occupies more than 27% of the rural landscapes in Latin America, and nowadays is considered as a major driver of tropical deforestation. Conventional monoculture pasture (CP) systems have degraded soils and caused negative environmental impacts. Recent years have shown increasing interest in the development of alternativ...
Pseudomonas putida DOT-T1E, known for its high tolerance to solvents, possesses three Resistance-Nodulation-Cell Division-type (RND) efflux pumps, namely TtgABC, TtgDEF and TtgGHI, which are involved in the active extrusion of solvents. Expression of the ttgABC and ttgGHI operons was previously shown to be regulated by the adjacently encoded repres...
Calorimetry or the measure of heat changes has been used for more than two centuries to study processes that release substantial
amounts of heat. However, recent advances in instrumentation have made it possible to detect much smaller heat changes generated
upon interaction of relatively small quantities of biomolecules. Over the last 30 years, the...
The RND family transporter TtgABC and its cognate repressor TtgR from Pseudomonas putida DOT-T1E were both shown to possess multidrug recognition properties. Structurally unrelated molecules such as chloramphenicol,
butyl paraben, 1,3-dihydroxynaphthalene, and several flavonoids are substrates of TtgABC and activate pump expression by binding
to th...
The TtgGHI efflux pump of Pseudomonas putida extrudes a variety of antibiotics and solvents. We show that the ttgGHI operon is transcribed in vitro and in vivo from a single promoter and not from two overlapping promoters as previously proposed.
The expression of this promoter is controlled by the TtgV repressor, whose operator expands through four...
Organic solvents with a log Pow(logarithm of its partition coefficient in n-octanol and water) between 1.5 and 4.0 are extremely toxic for microorganisms and other living cells because they partition preferentially in the cytoplasmic membrane, disorganizing its structure and impairing vital functions99. The toxicity of these compounds depends not o...
The TtgGHI efflux pump of Pseudomonas putida DOT-T1E plays a key role in the innate and induced tolerance of this strain to aromatic hydrocarbons and antibiotics. The ttgGHI operon is expressed constitutively from two overlapping promoters in the absence of solvents and at a higher level in their presence, but not in response to antibiotics. Adjace...
Ethanol biofiltration was studied in a 0.1651 packed bed reactor filled with sugar cane bagasse complemented with mineral medium and inoculated with Candida utilis. The main objective was to improve the elimination capacity of the system by adding salts to the solid medium. The biofilter was operated for one month, varying both the inlet ethanol co...
Organic solvents can be toxic to microorganisms, depending on the inherent toxicity of the solvent and the intrinsic tolerance of the bacterial species and strains. The toxicity of a given solvent correlates with the logarithm of its partition coefficient in n-octanol and water (log Pow). Organic solvents with a log Pow between 1.5 and 4.0 are extr...
Tesis Univ. Granada. Departamento de Bioquímica y Biología Molecular. Leída el 18 de julio de 2005