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Annales Bogorienses
Published by Badan Riset dan Inovasi Nasional
ISSN : 05178452     EISSN : 24077518     DOI : https://doi.org/10.55981/ann.bogor
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Annales Bogorienses aims to disseminate high-quality scientific research in the field of life sciences, with a strong emphasis on advancing knowledge and applications in biotechnology, molecular biology, biochemistry, bioinformatics, and bioengineering. The journal serves as a platform for researchers, academicians, and practitioners to share original findings, innovative methodologies, and critical reviews that contribute to scientific progress and sustainable development. The journal covers research in biotechnology, molecular biology, biochemistry, bioinformatics, and bioengineering. It publishes original research articles, reviews, and short communications, and is committed to rigorous peer review and open access for the widest possible dissemination of scientific knowledge.
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Articles 189 Documents
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Potency of Endophyte Bacterium Isolated from Shorea selanica on Producing IAA Hormone and Supporting the Growth of Soybean Widowati, Tiwit; Nuriyanah, Nuriyanah; Sukiman, Harmastini
Annales Bogorienses Vol. 17 No. 2 (2013): Annales Bogorienses
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Abstract

Growth of soybean plants was supported by the presence of nitrogen fixing bacteria. Besides nitrogen, other elements such as phosphate, potassium and growth hormones are also required. Endophytic bacteria associated with Shorea selanica were isolated and tested for their ability to produce indole acetic acid (IAA) hormone and exhibit stress tolerance. Colorimetric analysis showed that isolate SSBt2 produced the highest IAA (43.01 μg/ml) in culture supplemented with L-tryptophan. Isolate SSBt2 grew well in the some stress tests, except on heat and oxidative stress. The highest IAA producing strain was selected for determining its capability and compatibility to support the growth of soybean plants in glass house experiment. The results indicated that the endophytic bacteria isolated from S. selanica are compatible to support the growth of soybean. SSBt2 was identified as Enterobacter hormaechei based on 16S rRNA gene analysis.
Isolation and Screening of Surfactant-producing Bacteria from Indonesian Marine Environments and Its Application on Bioremediation Susilaningsih, Dwi; Okazaki, Fumiyoshi; Yopi, Yopi; Widyastuti, Yantyati; Harayama, Shigeaki
Annales Bogorienses Vol. 17 No. 2 (2013): Annales Bogorienses
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Abstract

Isolation and screening have been undertaken on oil-degrading microbes from Indonesian marine environments. During screening process it has been found many bacterial isolates capable of degrading crude oil. Hence, study has been focused on the biodiversity of biosurfactant-producing bacterial species in Indonesian marine environment and its function for remedial the pollutant in marine and soil areas. A total of 103 out of 463 isolates showed positive surfactant-degrading properties. By means of partial 16S rRNA gene analyses, it has been found that the majority of taxa are related to Alcanivorax, Pseudomonas, Bacillus, Bortetela, Brucella, Acenitobacter, Staphia, Lysobacter, and Talasosophira. Biosurfactant properties assay showed that they were capable of lowering the surface and interfacial water tension from 74 mN/m to 40-65 mN/m and from 24 mN/m to 6-10 mN/m, respectively. In addition, most of the surfactants were capable of emulsifying hydrocarbon (crude oil) of 0.01 to 0.15 units, comparable to 0.08 units of synthetic surfactant (20% Tween). Further observation showed that the majority of the surfactants were able to degrade a long chain of alkane, but not branched alkane, with a recovering rate of 20-80%. The application of the surfactant towards oil polluted model beach was done in laboratory scale and showing the surfactant obtained from microbial broth cultures capable for recovering the oil pollutant significantly, compared to the control (without addition microbial broth).
Antioxidant, Antibacterial, and Antidiabetic Activities of Roselle (Hibiscus sabdariffa) Extracts Suharli, Lili; Manguntungi, Baso; Azis, Andi Asmawati; Mustopa, Apon Zaenal; Meilina, Lita; Pandayu, Iga Firmansyah; Vanggy, Leggina Rezzy; Irawan, Shasmita
Annales Bogorienses Vol. 25 No. 2 (2021): Annales Bogorienses
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Hibiscus sabdariffa L., also referred to as roselle, is commonly utilized in the pharmaceutical and food industries. Roselle contains bioactive compounds such as phenolics, alkaloids, tannins, flavonoids, saponins, and organic acids, which have pharmacological properties, such as antioxidant, antibacterial, immune booster, antidiabetic, anti-inflammatory, and anti-hypertensive properties. There are many studies regarding the pharmacological activities of roselle extract and its applications. However, there has been no research to study the effectiveness of the solvent in testing roselle petal extracts against antibacterial, antioxidant, and antidiabetic activities, simultaneously. This research used two kinds of polar solvents, dH2O and ethanol, with various concentrations for antibacterial activity test by five pathogenic bacteria, for antioxidant test by the DPPH method, and for antidiabetic test by the alpha-glucosidase inhibition method. The result showed that the ethanol extract of roselle had higher antibacterial activity compare to the roselle water extract. Antioxidant activity of roselle ethanol extract at 20% concentration had the highest activity 69.75 ± 0.002%; while, the 100% concentration of roselle water extract had the highest antioxidant activity 138.73 ± 0.013%. antidiabetic activity of roselle ethanol and water extract at 100% concentration had the highest activity 1,195.44 ± 0.007% and 1,552.49 ± 0.069%, respectively.
Isolation and Characterization of Bacterial Carbonate Precipitation for Biogrouting Suyanto, Eko; Sari, Miranti Nurindah; Ratnakomala, Shanti; Fahrurrozi, Fahrurrozi; Gusmawati, Niken F.
Annales Bogorienses Vol. 25 No. 2 (2021): Annales Bogorienses
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Biogrouting is a process that transforms soil or sand into calcarenite or sandstone by bacterial calcium carbonate precipitation . The mechanisms of this process are that the bacteria hydrolyze urea catalyzed by urease, and with the existence of dissolved Ca2+, a solid crystalline calcite or calcium carbonate (CaCO3) will be produced. The main advantage of biogrout is that soil or sand can be strengthened without interfering with the hydraulics of the treated soil or sand and without excavation or replacement. In this study, the isolation and identification of bacterial calcium carbonate precipitation , and characterization of urease produced by bacteria were conducted. In the isolation method, the enrichment method using urea as abacterial carbon source was carried out. The formation of crystalline calcite was observed by a light microscope. The urease enzyme activity was determined by the 3, 5-Dinitrosalicylic acid (DNS) method. The molecular identification of isolates was analyzed by the determination of 16S rRNA gene sequencing. As a result, 19 calcium carbonate precipitation have been isolated from soils, sands, water, and rocks collected from several areas in Indonesia. They showed calcite formation in a medium with urea. Molecular identification of isolates with high urease enzyme activity revealed that the isolates belong to the group Bacilli. The highest enzyme activity produced by ID10-U004 is 374.94 U/mL. The preliminary biogrouting experiment was also conducted using isolated strain, and the reaction was able to make the sand solid and stiff.
EDITOR'S PREFACE Lisdiyanti, Puspita
Annales Bogorienses Vol. 18 No. 1 (2014): Annales Bogorienses
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Role of Lactobacillus helveticus on Flavor Formation in Cheese: Amino Acid Metabolism Widyastuti, Yantyati; Lisdiyanti, Puspita; Tisnadjaja, Djadjat
Annales Bogorienses Vol. 18 No. 1 (2014): Annales Bogorienses
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Lactic acid bacteria, mainly lactobacilli, play an important role in cheese making. Their role can be divided into starters and non-starters or secondary microorganisms. Lactobacillus helveticus, an obligately homofermenter and thermophilic bacterium, has unique properties as a starter because of its ability to induce strong impact on cheese flavor. The bacteria are known to be prototrophic for 5 amino acids and auxotrophic for 13 amino acids. It is interesting that the conversion of aromatic amino acids, branch chain amino acids, and methionine into volatile and nonvolatile compounds by L. helveticus is thought to represent the rate-limiting step in the formation of mature flavor and aroma in cheese. The addition of a highly autolytic L. helveticus to a starter system could significantly increase the formation of flavor precursor and some volatile compounds during cheese ripening. This article focuses on the contribution of L. helveticus to flavour compound formation in cheese with particular emphasis on amino acid metabolism.
Construction and Expression of Immunotoxin Anti EGFRvIII scFv-HPR Conjugate in Pichia pastoris as A Targeted Drug Candidate for Cancer Therapy Yuliawati, Yuliawati; Soejoedono, Retno Damayanti; Fuad, Asrul Muhamad
Annales Bogorienses Vol. 18 No. 1 (2014): Annales Bogorienses
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Epidermal growth factor receptor variant III (EGFRvIII) is a mutant of EGFR lacking 267 amino acids (exon-2 through 7) within its extracellular domain, resulting in the formation of a new epitope as a tumor specific target. EGFRvIII is commonly found in GBM, breast, ovarian, prostate, and lung carcinomas. Antibodies or part of antibodies (e.g. single chain variable fragment or scFv) with specific activity against this receptor have been developed. These antibodies are internalized into the cell after receptor binding. Ribonucleases can be cytotoxic due to their inherent ability to degrade RNA, therefore causing cell death via inhibition of protein synthesis. The aim of this research is to construct, clone and express an immunotoxin-based conjugate combining an anti-EGFRvIII scFv with a HPRmut (human pancreatic ribonuclease mutant variant) in Pichia pastoris. The anti-EGFRvIII scFv gene was cloned into yeast expression vector pPICZαA and fused with EGFP gene as a marker. The HPRmut gene was subsequently cloned at the C-terminal of the scFv::EGFP fusion, resulting in the scFv::EGFP::HPR fusion construct. The fusion construct was successfully obtained and nucleotide sequence of plasmid was verified. This construct was used to transform P. pastoris SMD 1168H. The gene fusion was successfully transformed and expressed in P. pastoris with a transformation efficiency of 102 cfu/μg DNA. The transformed yeasts were screened on agar media containing up to 1000 μg/ml zeocin. Yeast transformants showed green fluorescent due to the expression of EGFP gene. The recombinant proteins have been expressed and secreted from P. pastoris as showed by immunoblotting and SDS-PAGE analyses, then purified by affinity chromatography method. The selected yeast transformant produced at least 15.85 mg of purified protein per liter of yeast culture. 
Expression of An Immunogenic Intimin Fragment of EHEC O157:H7 in Escherichia coli Periplasm under The Control of A Rhamnose-Based Regulated Promoter Hariyatun, Hariyatun; Suwanto, Antonius; Kusharyoto, Wien
Annales Bogorienses Vol. 18 No. 1 (2014): Annales Bogorienses
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Intimin is the main adhesin of Enterohemorrhagic E. coli (EHEC) O157:H7 bacteria which are the most common leading infectious cause of bloody diarrhea and acute kidney failure in children who develop hemolytic uremic syndrome (HUS). Intimin is required for persistent bacterial colonization to eukaryotic host cell and its receptor-binding activity is localized at the C-terminus 282 amino acids (Intimin282). Thus, Intimin282 is an attractive antigen candidate that could be useful in vaccine and diagnostic systems against EHEC infections. Previous studies had reported expression of Intimin in E. coli cytoplasm using commonly used prokaryotic expression systems. However, it usually encountered several problems, i.e. low expression level, leaky expression, inclusion body formation, and truncated protein. The pRHA vector, which is tightly regulated by Lrhamnose and D-glucose, represents a viable alternative E. coli expression system to overcome such problems. Moreover, E. coli periplasm has an advantage of maintaining protein functionality by providing an oxidative environment that is more efficient than cytoplasm. However, to date there is no study about Intimin expressionusing pRHA expression system and/or in E. coli periplasm. Accordingly, we constructed a recombinant pRHA vector harbouring the respective gene to investigate the expression of an immunogenic Intimin fragment of EHEC O157:H7 in E. coli periplasm. The gene encoding His6-tagged Intimin282 (Int282) together with pelB signal sequence was cloned into the pRHA vector, subsequently expressed in E. coli JM109 and purified. Expression and purification of Int282 were verified by SDS-PAGE and Western blot. The result showed that Int282 was successfully expressed in E. coli periplasm with a protein size of approximately 32 kDa, which corresponded with the predicted size of the protein based on its amino acid sequence.
Somatic Embryo Germination of Jatropha curcas L in Presence of Sucrose and Poly Ethylene Glycol (PEG) Rudiyanto, Rudiyanto; Efendi, Darda; Ermayanti, Tri Muji
Annales Bogorienses Vol. 18 No. 1 (2014): Annales Bogorienses
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Jatropha curcas L. is a potential source of a non-edible biofuel. Conventional propagation of J. curcas technique has some limitations. Somatic embryo can produce a large number of embryos and obtain a large number of plants all year round. Treatment of sucrose in combination with polyethylene glycol (PEG) was proven to enhance germination of somatic embryos in many plant species. The aim of the study was to investigate the effect of sucrose in combination of PEG on somatic embryo germination in J. curcas. Globular somatic embryos at 0.025-0.030 g fresh weight having 0.4-0.5 cm in diameter were grown on MS medium solidified with 3 g/l of Gelzan supplemented with sucrose at 20, 30, 40, and 50 g/l in combination with PEG at 0, 2.5, 5, 10, and 15%. Results showed that the best medium for germination of J. curcas somatic embryo cultures was MS medium supplemented with 20 and 30 g/l of sucrose in combination with 5% of PEG. The numbers of germinated embryos per clump had significant enhancement on those medium compared with the control (PEG free treatment) (2.65 to 5.65) and (2.55 to 5.50). In addition, those treatments resulted in the highest percentage of clumps forming germinated embryos (100%), with an average of normal germinated embryos at 94.163 and 96.065%. The addition of 40 and 50 g/l of sucrose in combination with 15% of PEG caused all embryos to fail at germinating.
In vitro Seed Germination and Shoot Multiplication of Seven Endemic Subalpine and Alpine Plant Species Grown on Mount Jaya, Papua, Indonesia Ermayanti, Tri Muji; Hafiizh, Erwin Al; Mandessy, Ary; Setyadi, Gesang; Mukhsia, Andi
Annales Bogorienses Vol. 18 No. 1 (2014): Annales Bogorienses
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Exploitation on plant population may put the endemic plants into an endangered state, hence, these plants will need to be conserved. In order to pursue conservation on endemic plants, we conducted in vitro seed germination and shoot multiplication of seven alpine and sub-alpine species endemic to Mount (Mt.) Jaya, in Papua, Indonesia, i.e. Tetramolopium klossii, Deschampsia klossii, Papuacalia cartenszensis, Epilobium hooglandii, Gaultheria novoguinensis, Rhododendron correoides, and Rhododendron culminicolum. These species are categorized as slow-growth plants found in higher altitude (over 3700 m above sea level) and low temperature of Mt. Jaya. Seeds were surface-sterilized using Na-hypochloride and germinated aseptically on Murashige and Skoog (MS) medium. Dytikinin benzyl adenine (BA) was used for shoot multiplication. Seedling cultures were maintained in a controlled environment with continuous low light intensity (800 lux) and at temperature 26-27oC. Results showed that most species had more than 80% of germination rate on MS medium after a week in culture. BA was required to enhance shoots multiplication. Woody Plant (WP) (Lloyd & McCown, 1981) medium gave better shoot multiplication for R. culminicolum.

Page 14 of 19 | Total Record : 189

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