Research Topics
| Howard JuncaSummaryAffiliation: CorpoGen Location: Bogota, Colombia URL: www.corpogen.org/howardjunca Summary: Head of Research Group: Microbial Ecology: Metabolism, Genomics and Evolutions of Environmental Microorganisms - CorpoGen www.corpogen.org/ecologiamicrobiana Grants: Platform for exploring antimalarial compounds in metagenomes. 2010. Principal Investigator (PI) of national project (Colciencias) Metagenomic exploration of the microbial communities associated to marine sponges: searching for the ancient and natural origin of the potential to generate/degrade halogenated aromatics. 2010. Principal Investigator (PI) of national project (Colciencias) MAGICPAH - Molecular Approaches and MetaGenomic Investigations for optimizing Clean-up of PAH contaminated sites www.magicpah.org 2010. Partner of the European Comission project (FP7). Establishing a metagenomic and bioinformatic platform for characterizing and using genetic resources of extreme environments www.gebix.org.co 2008. Participant in the national network project (Colombian Excellence Research Center GeBiX-Colciencias). Collaborative research project with the Center for Biotechnology, Universidade Federal do Rio Grande do Sul. 2009. Colombian partner under the bilateral official agreement between Brasil (CNPq) and Colombia (Colciencias) Publications
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Detail Information
Publications
Tannic acid induces transcription of laccase gene cglcc1 in the white-rot fungus Coriolopsis gallicaJosé M Carbajo
Departamento de Microbiologia Molecular, Centro de Investigaciones Biologicas CIB, Consejo Superior de Investigaciones Cientificas CSIC, Velazquez 144, E 28006 Madrid, Spain
Can J Microbiol 48:1041-7. 2002..gallica grown in culture media supplemented with tannic acid. The role of tannic acid was shown to be an inductor of laccase activity in this fungus, due to the enhancement of expression of the laccase gene at the transcriptional level...
Isolation and characterization of Alicycliphilus denitrificans strain BC, which grows on benzene with chlorate as the electron acceptorSander A B Weelink
Laboratory of Microbiology, Wageningen University, Wageningen, The Netherlands
Appl Environ Microbiol 74:6672-81. 2008..Thus, aerobic pathways can be employed under conditions in which no external oxygen is supplied...
Enhancement of the microbial community biomass and diversity during air sparging bioremediation of a soil highly contaminated with kerosene and BTEXNadja Kabelitz
Department of Bioremediation, Helmholtz Centre for Environmental Research UFZ, Permoserstr 15, 04318, Leipzig, Germany
Appl Microbiol Biotechnol 82:565-77. 2009....- Growth of Pseudomonas chloritidismutans AW-1(T) on n-alkanes with chlorate as electron acceptorFarrakh Mehboob
Wageningen University, The Netherlands
Appl Microbiol Biotechnol 83:739-47. 2009..The strain degrades n-alkanes with oxygen and chlorate but not with nitrate, thus suggesting that the strain employs oxygenase-dependent pathways for the breakdown of n-alkanes... - Characterization of a gene cluster involved in 4-chlorocatechol degradation by Pseudomonas reinekei MT1Beatriz Cámara
Department of Microbial Pathogenesis, HZI Helmholtz Centre for Infection Research, Braunschweig, Germany
J Bacteriol 191:4905-15. 2009.... - Metagenomics reveals diversity and abundance of meta-cleavage pathways in microbial communities from soil highly contaminated with jet fuel under air-sparging bioremediationMaria V Brennerova
Institute of Microbiology, Czech Academy of Sciences, Prague, Czech Republic
Environ Microbiol 11:2216-27. 2009.... - Mangrove microniches determine the structural and functional diversity of enriched petroleum hydrocarbon-degrading consortiaNewton C M Gomes
CESAM and Department of Biology, University of Aveiro, Campus Universitario de Santiago, Aveiro, Portugal
FEMS Microbiol Ecol 74:276-90. 2010.... - Metabolic networks, microbial ecology and 'omics' technologies: towards understanding in situ biodegradation processesRamiro Vilchez-Vargas
Microbial Interactions and Processes Research Group, HZI Helmholtz Centre for Infection Research, Inhoffenstraße 7, D 38124 Braunschweig, Germany
Environ Microbiol 12:3089-104. 2010..Collectively, this will allow tracking regulation and evolution within microbial communities ultimately aiming to understand the mechanisms taking place in large scale bioremediation treatments for aromatic decontamination... - Genome sequences of Alicycliphilus denitrificans strains BC and K601TMargreet J Oosterkamp
Laboratory of Microbiology, Wageningen University, Dreijenplein 10, 6703 HB, Wageningen, The Netherlands
J Bacteriol 193:5028-9. 2011..denitrificans strains BC and K601(T) were sequenced. Here, we report the complete genome sequences of A. denitrificans strains BC and K601(T)... - Gulosibacter molinativorax ON4T molinate hydrolase, a novel cobalt-dependent amidohydrolaseMárcia Duarte
LEPAE Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
J Bacteriol 193:5810-6. 2011..However, in contrast to previously described members of the metal-dependent hydrolase A subfamily, molinate hydrolase contains cobalt as the only active-site metal... - trans-Dienelactone hydrolase from Pseudomonas reinekei MT1, a novel zinc-dependent hydrolaseBeatriz Cámara
Department of Microbial Pathogenesis, HZI Helmholtz Centre for Infection Research, Inhoffenstr 7, 38124 Braunschweig, Germany
Biochem Biophys Res Commun 376:423-8. 2008..It is the first member of COG1878 and PF04199 for which a direct physiological function has been reported... - Two angular dioxygenases contribute to the metabolic versatility of dibenzofuran-degrading Rhodococcus sp. strain HA01Hamdy A H Aly
Department of Environmental Microbiology, HZI Helmholtz Centre for Infection Research, Inhoffenstrasse 7, D 38124 Braunschweig, Germany
Appl Environ Microbiol 74:3812-22. 2008..strain HA01 constitutes the first described example of a bacterial strain where coexpression of two angular dioxygenases was observed. Such complementary activity allows for the efficient transformation of chlorinated DBFs... - Melanoidin-containing wastewaters induce selective laccase gene expression in the white-rot fungus Trametes sp. I-62Tania Gonzalez
Department of Molecular Microbiology, Centro de Investigaciones Biologicas, Ramiro de Maeztu 9, E 28040 Madrid, Spain
Res Microbiol 159:103-9. 2008..This is the first time differential laccase gene expression has been reported to occur upon exposure of fungal cultures to molasses wastewaters and their melanoidins... - Identification of a new laccase gene and confirmation of genomic predictions by cDNA sequences of Trametes sp. I-62 laccase familyTania Gonzalez
Centro de Investigaciones Biologicas, Velazquez 144, E 28006 Madrid, Spain
Mycol Res 107:727-35. 2003..6% identity with lcc1 at protein level. Such high similarity between lcc1 and lcc1A sequences, and the comparison with reports from other basidiomycete laccases, suggest that in this strain these two genes are allelic variants... - Amplified functional DNA restriction analysis to determine catechol 2,3-dioxygenase gene diversity in soil bacteriaHoward Junca
Department of Environmental Microbiology, GBF German Research Centre for Biotechnology, Mascheroder Weg 1, D 38124 Brunswick, Germany
J Microbiol Methods 55:697-708. 2003..This approach may be useful to differentiate functional genes also for many other gene families... - Functional gene diversity analysis in BTEX contaminated soils by means of PCR-SSCP DNA fingerprinting: comparative diversity assessment against bacterial isolates and PCR-DNA clone librariesHoward Junca
Department of Environmental Microbiology, GBF German Research Centre for Biotechnology, Mascheroder Weg 1, D 38124 Braunschweig, Germany
Environ Microbiol 6:95-110. 2004.... - Tannic acid interferes with the commonly used laccase-detection assay based on ABTS as the substrateM C Terrón
Centro de Investigaciones Biologicas, CSIC, Ramiro de Maeztu 9, E 28040, Madrid, Spain
Biochimie 86:519-22. 2004..Therefore, our results represent an important warning concerning a commonly used method for measuring, detecting or screening laccases in biological samples that may content tannic acid or structural-related molecules... - Difference in kinetic behaviour of catechol 2,3-dioxygenase variants from a polluted environmentHoward Junca
Department of Environmental Microbiology, GBF German Research Centre for Biotechnology, Mascheroder Weg 1, D 38124 Braunschweig, Germany
Microbiology 150:4181-7. 2004.... - Alternative primer sets for PCR detection of genotypes involved in bacterial aerobic BTEX degradation: distribution of the genes in BTEX degrading isolates and in subsurface soils of a BTEX contaminated industrial siteBarbara Hendrickx
Environmental and Process Technology (Vito, Flemish Institute for Technological Research, B-2400 Mol, Belgium
J Microbiol Methods 64:250-65. 2006..They indicate that bacteria carrying specific pathways and primarily carrying tmoA/xylM/xylE1 genotypes, are being selected upon BTEX contamination... - Assessment of toluene/biphenyl dioxygenase gene diversity in benzene-polluted soils: links between benzene biodegradation and genes similar to those encoding isopropylbenzene dioxygenasesRobert Witzig
Department of Environmental Microbiology, GBF-German Research Centre for Biotechnology, Mascheroder Weg 1, D-38124 Braunschweig, Germany
Appl Environ Microbiol 72:3504-14. 2006.... - Eight Americas: a new definition for "Americas"?Howard Junca
PLoS Med 4:e42. 2007 - Molecular detection and diversity of novel diterpenoid dioxygenase DitA1 genes from proteobacterial strains and soil samplesRobert Witzig
Department of Environmental Microbiology, HZI Helmholtz Centre for Infection Research, Inhoffenstrasse 7, D 38124 Braunschweig, Germany
Environ Microbiol 9:1202-18. 2007..The molecular fingerprints indicated the presence ofa broad, previously unrecognized diversity of diterpenoid dioxygenase genes in soils, and suggest that other bacterial phyla may also harbour the genetic potential for DhA-degradation... - In-depth characterization via complementing culture-independent approaches of the microbial community in an acidic hot spring of the Colombian AndesLaura C Bohorquez
Molecular Genetics and Biotechnology, Corporación Corpogen, Carrera 5 No 66A 34, 110231, Bogota, DC, Colombia
Microb Ecol 63:103-15. 2012..Overall, the combined use of different approaches provided a broader view of the microbial community in this acidic hot spring...