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INDONESIA
Indonesian Journal of Biotechnology
Published by Universitas Gadjah Mada
ISSN : 08538654     EISSN : 20892241     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Immunology & microbiology Materials Science & Nanotechnology
The Indonesian Journal of Biotechnology (IJBiotech) is an open access, peer-reviewed, multidisciplinary journal dedicated to the publication of novel research in all aspects of biotechnology, with particular attention paid to the exploration and development of natural products derived from tropical—and especially Indonesian—biodiversity. IJBiotech is published biannually and accepts original research articles featuring well-designed studies with clearly analyzed and logically interpreted results. A strong preference is given to research that has the potential to make significant contributions to both the field of biotechnology and society in general.
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue " Vol 15, No 1 (2010)" : 6 Documents clear
Detection and Cloning of a Gene Involved in Zwitermicin A Synthesis from Plant Growth Promoting Rhizobacteria of Bacillus sp CR64 Wahyudi, Aris Tri; Astuti, Rika Indri; Mubarik, Nisa Rachmania; Faulina, Sarah Asih
Indonesian Journal of Biotechnology Vol 15, No 1 (2010)
Publisher : Universitas Gadjah Mada

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Abstract

Utilization of soil bacteria as biocontrol agent is becoming popular due to its valuable and effective mechanisms to suppress plant pathogenic microbes. We have previously isolated Bacillus sp, designated as Bacillus sp CR64, which exhibited effective plant growth promoting and antifungal activities. In this study, CR64 was examined in inhibiting the growth of Rhizoctonia solani, the causing agent of root rot disease. Partial sequence analysis of 16S rRNA gene revealed that this isolate similar with Bacillus cereus (94%). Furthermore, a gene designated zmaR was detected by means of specific amplification of DNA fragment approximately 950 bp. This fragment was then cloned onto pCRII-TOPO (3.9 kb) and sequenced using DNA sequencer ABI PRISM 310. Sequence analysis revealed that it had highest homology with the ZmaR protein (89% identity; 90% similarity) of B. thuringiensis serovar kurstaki (AAF82729.2). Alignment analysis with other ZmaR sequences from other antibiotic-producing Bacilli exhibited an almost fully conserved region within ZmaR sequences.Key words : PGPR, Bacillus sp CR64, Zwitermicin A, Cloning, Antifungal.
Characterization of envelope-transmembrane Gene of Jembrana Disease Virus Tabanan 1995 Isolate Kusumawati, Asmarani; Pratiwi, Rarastoeti; Astuti, Pudji; Hamid, Penny Humaidah
Indonesian Journal of Biotechnology Vol 15, No 1 (2010)
Publisher : Universitas Gadjah Mada

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Abstract

The availability of specific and rapid detection methods is essential for monitoring the health status of farmed species, particularly in viral disease as in this case early diagnosis is a critical factor in containing disease outbreaks. Jembrana Disease Virus (JDV) is a lentivirus that causes an acute, severe disease syndrome in infected Bali cattle in Indonesia, resulting in heavy economic losses because of the high mortalities. The virus-host interaction and the modes of transmission are still unknown. The goal of the research was to designa probe candidate of Jembrana Disease Virus based on envelope-transmembrane (env-tm) gene to optimize Jembrana disease detection method. The DNA fragment derived from env-tm of JDV was used, cloned in pGEX-TM and expressed in E.coli DH 5α. Sequence analysis was conducted with BLAST programs from NCBI. Sequence analyses of the fragments of env-tm clone, indicated that it has a very closed genetic relation with 97,68% homology identity. Probe was designed based on the conserved region of env-tm using Geneious resulted in JT2 252 bp long. BLAST analyses showed that probes had high specifity to other strains of JDV in Indonesia.Key words : probe, env-tm, JDV, specifity, sensitivity.
Purification and Characterization of Streptomyces sp. IK Chitinase Margino, Sebastian; Nugroho, Agustinus Joko; Asmara, Widya
Indonesian Journal of Biotechnology Vol 15, No 1 (2010)
Publisher : Universitas Gadjah Mada

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Abstract

Streptomyces sp. IK isolated from compost inoculants, could produce extra cellular chitinase in a medium containing 0.2% (w/v) colloidal chitin, fermented for 96 hours at 30oC. The enzyme was purified by a combination of ammonium sulphate precipitation and DEAE-Cellulose anion-exchange chromatography. On SDS-polyacrylamide gel electrophoresis analysis, the purified enzyme showed a mass of 71 kDa. Chitinase was optimally active at pH of 6.7 and at 37oC. Km value and Vmax of the protein for colloidal chitin were 2.92 mg/ml and 4.26 ìg/h, respectively.Key words : chitinase, Streptomyces, purification, characterization
Molecular cloning of gene fragment encoding 4-coumarate: Coenzyme A ligase of Sengon (Paraserianthes falcataria) Hartati, Sri N.; Sudarmonowati, Enny; S, Suharsono; Sofyan, Kurnia
Indonesian Journal of Biotechnology Vol 15, No 1 (2010)
Publisher : Universitas Gadjah Mada

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Abstract

4-coumarate:Coenzyme A ligase (4CL) plays an important role in lignin biosynthetic pathway thatcatalyzed the activation of coumaric acid, caffeic acid or ferulic acid to be a syringil monomer. Ligninbiosynthesis control through 4CL down regulating would support lower lignin wood production. Theobjective of this study was to clone conserved region cDNA of gene encoding 4CL. Gene fragment isolation wasconducted by means of reverse transcriptase polymerase chain reaction (RT-PCR) using degenerateheterologous primer. The RT-PCR products were purified, sequenced and analyzed to select the highlyhomologous fragment to 4CL. BLASTanalysis result showed that deduction of amino acid sequences from oneof two RT-PCR product nucleotide was highly homologous with the 4CL conserved region from Rubbus ideaus,Oryza sativa, Populus tomentosa, Populus balsamifera, Betulla platyphilla, Nicotiana tabacum, and Arabidopsisthaliana with identity ranging from 78-90%.Key words: 4-coumarate: Coenzyme A ligase, lignin, sengon
Comparative Analysis of Rice Transformation Using Agrobacterium tumefaciens and Rhyzobium leguminosarum Rahmawati, Syamsidah; Jefferson, Osmat Azzam; Sopandie, Didy; ., Suharsono; Slamet-Loedin, Inez Hortense
Indonesian Journal of Biotechnology Vol 15, No 1 (2010)
Publisher : Universitas Gadjah Mada

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Abstract

This study was aimed to study the effectiveness of Rhizobium transformation system compared to the most widely used Agrobacterium mediated transformation system on three rice cultivars, Ciherang (Indica), Nipponbare (Japonica), and Rojolele (Javanica). Six day old calli induced from immature embryos were inoculated with Rhizobium leguminosarum bv trifolii ANU845 and Agrobacterium tumefaciens LBA288 that harbored with vector pCAMBIA 5106. This plasmid contained a minimum set of transfer machinery genes and had a gusplus and an hptII gene driven by 35S CaMV promoter in the T-DNA. The results showed that the transformation frequencies (number of PCR positive plants per number of calli inoculated) ranging from 0 to 12.05 % depend on the genotype and transfer agent used. The highest transformation frequency (12.05%) was obtained in Ciherang transformed with R. leguminosarum. Most of the transgenic rice obtainedby Rhizobium transformation were normal in morphology and fertile similar to those obtained by Agrobacterium transformation. Integration, expression and inheritance of transgenes were demonstrated by molecular and genetic analysis in T0 and T1 generations.Key words : Rhizobium leguminosarum, immature embryos, Agrobacterium tumefaciens
An Actinomycetes Producing Anticandida Isolated from Cajuput Rhizosphere: Partial Identification of Isolates and Amplification of pks-I genes ., Alimuddin; Asmara, Widya; Widada, Jaka; ., Mustofa; Nurjasmi, Reni
Indonesian Journal of Biotechnology Vol 15, No 1 (2010)
Publisher : Universitas Gadjah Mada

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Abstract

Actinomycetes have been the most prolific producer of various kinds of antifungal metabolites, and many of them are described as being produced by polyketide synthetases (pks). We present strain of Actinomycetes producing anticandida isolated from rhizosphere plant for amplification of Pks-I genes. The isolate was obtained from Wanagama I Forest UGM Yogyakarta. Gene of seven isolates, from total of 173 isolates, were amplified using degenerate primer to detect the presence of pks genes. One strain that is named Streptomyces sp. GMR-22 was partialy identified as anticandida producing actinomycete. The strain shown the strongest activity against Candida albicans. Based on bioautography assay, one spot active with Rf 0.57 was appeared as bright yellow by cerrium sulphate but it was and not visible on UV254 and 366 lights. Key words : pks genes, anticandida, Streptomyces sp GMR-22, rep-PCR, cajuput rhizosphere

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