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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Gizi dan Pangan Jurnal Fitopatologi Indonesia Jurnal Teknologi Dan Industri Pangan Jurnal Akuakultur Indonesia Jurnal Farmasi Udayana CHEMISTRY PROGRESS Jurnal Pendidikan Bahasa dan Sastra Indonesia Undiksha Microbiology Indonesia BIOTROPIA - The Southeast Asian Journal of Tropical Biology Current Biochemistry The Journal of Pure and Applied Chemistry Research Indonesian Journal of Biotechnology BERITA BIOLOGI ANNALES BOGORIENSES FITOFARMAKA: Jurnal Ilmiah Farmasi Menara Perkebunan Jurnal Jamu Indonesia Sainstek : Jurnal Sains dan Teknologi Jurnal Pusat Inovasi Masyarakat Jurnal Ilmu Kehutanan Molekul: Jurnal Ilmiah Kimia Journal of The Indonesian Society of Integrated Chemistry Indonesian Journal of Jamu

I MADE ARTIKA

Department Of Biochemistry, Faculty Of Mathematics And Natural Sciences, Darmaga Campus, IPB University, Bogor, 16680, Indonesia

Author-ID : 234078

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Veterinary Other

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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.18.3.103

The yeast mitochondrial F1F0-ATP synthase is a multisubunit complex that contains at least 17 different subunits. Subunit 8 of yeast mitochondrial ATP synthase is a hydrophobic protein of 48 amino acids encoded by the mitochondrial ATP8 gene. A dual control allotopic expression system for subunit 8 has been developed. The strategy involves maintenance of two different compatible yeast expression vectors each utilizing a different inducible promoter in the same host cells. The system thus enables cloning and allotopic expression of two different forms of subunit 8 gene. The goal of the developed strategy is to permit allotopic expression of functional wildtype subunit 8 gene under a conditional promoter system and subunit 8 variant gene under the control of a different promoter system. The system is potentially useful for accurate assessment of assembly behavior of functionally defective subunit 8 variants in vivo. The strategy relies on the ability to conditionally regulate the expression of the two genes. A set of functionally defective subunit 8 variants has been cloned under an inducible yeast promoter system and dual plasmid harboring strains for dual control allotopic expression of each variant have been constructed.

Bioflocculant producing-bacteria from tapioca waste water were characterized. Two bacterial isolates i.e. LT-5 and LT-6 isolates had high flocculation activity, with activity of 68.92 and 71.38% respectively. The flocculation activity of LT-5 isolate increased at pH 2.0-4.0 (acidic condition), however the activity of LT-6 increased at pH 6.0-8.0 (neutral). Addition of 0.05% of AlCl3 as cation was the most effective and had important role in flocculation activity. Based on the morphological prope . SURYANI; LAKSMI AMBARSARI; I MADE ARTIKA; HARTUTIK EKA SUSANTI
HAYATI Journal of Biosciences Vol. 18 No. 4 (2011): December 2011
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.18.4.193

Bioflocculant producing-bacteria from tapioca waste water were characterized. Two bacterial isolates i.e. LT-5 and LT-6 isolates had high flocculation activity, with activity of 68.92 and 71.38% respectively. The flocculation activity of LT-5 isolate increased at pH 2.0-4.0 (acidic condition), however the activity of LT-6 increased at pH 6.0-8.0 (neutral). Addition of 0.05% of AlCl3 as cation was the most effective and had important role in flocculation activity. Based on the morphological properties, LT-5 isolate was identified as Chromobacterium violaceum and LT-6 isolate was identified as Citrobacter koseri.

Aktivitas Kitinase dan Peroksidase dari Ekstrak Protein Daun, Akar, Kalus dan Tunas In Vitro Trichosanthes tricuspidata Lour. Dewi Sukma; Roedhy Poerwanto; , Sudarsono; Nurul Khumaida; Suryo Wiyono; I Made Artika
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 36 No. 1 (2008): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

A number of Trichosanthes species has been reported as a source of bioactive protein associated with defense mechanisms such as chitinase. Chitinase and peroxidase of crude protein extracted from leaves, roots, in vitro calli and shoots of T. tricuspidata had been analysed. Calli were induced on MS medium containing combinations of 1 µM NAA + 1 µM BA (K1), 2 µM NAA + 2 µM BA (K2), 3 µM NAA + 3 µM BA (K3), or 4 µM NAA + 4 µM BA (K4). Shoots were cultured in MS with 1 mg/l of BA, while leaves and roots were harvested from six-month old plants grown on the field. Results of the experiment suggested that K1-K4 medium could be used to induce calli although weight of calli from all medium composition was not significantly different (0.19-0.31 g/explant/4 weeks). Calli from K1 medium had the highest of total crude protein content (3.24 mg/ml). The highest of chitinase activity was found in in vitro shoots (6.51 mM pNP/hour/mg protein) and the highest peroxidase activity was in the plant roots (0.25 ∆ 420/minute/mg protein). Key words: in vitro calli, shoots, crude protein, chitinase and peroxidase activities

Aktivitas Kitinase dan Peroksidase dari Ekstrak Kasar Protein Asal Kalus dan Berbagai Jaringan Tanaman Trichosanthes cucumerina var. anguina Dewi Sukma; Roedhy Poerwanto; , Sudarsono; Nurul Khumaida; I Made Artika; Suryo Wiyono
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 3 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Chitinase and peroxydase are important bioactive proteins or are specific enzymes that are related to plant resistance to pathogens. The aims of the research were to analyze the chitinase and peroxidase activities of crude protein extract from calli, stem, leaves and roots of T. cucumerinavar. anguina. In the first experiment, chitinase and peroxydase activities were analyzed from in vitro calli, leaves and roots obtained from 2-month-old of field grown plants. The media for calli induction were Murashige and Skoog medium with addition of 1 µM NAA + 1 µM BA, 2 µM NAA + 2 µM BA, 3 µM NAA + 3 µM BA, or 4 µM NAA + 4 µM BA. In the second experiment, the chitinase and peroxydase activities from crude protein extract of roots, stems and leaves were analyzed. The extracts were from 3-week-old seedling (less than a month), 1-month and 2-month-old plants. The first and the second experiment results showed that crude protein extracts of plant roots from the field grown plants had the highest chitinase and peroxidase activities. Stem of field grown plants had the similar level of chitinase activities with the plant roots. Chitinase activities of in vitro calli were not significantly different from those of plant roots so that it could be used as an alternative for plant roots in studying chitinase from T. cucumerinavar. anguina. Chitinase activities in crude protein extracts of roots appeared constant whereas peroxidase tend to increase with plant age. Keywords: calli, enzyme activities, leaves, roots, stem

KAJIAN BIOAKTIF DAN ZAT GIZI PROPOLIS INDONESIA DAN BRASIL Eliza Halim; Hardinsyah Hardinsyah; Noorwati Sutandyo; Ahmad Sulaeman; Made Artika; Yahdiana Harahap
Jurnal Gizi dan Pangan Vol. 7 No. 1 (2012)
Publisher : Food and Nutrition Society of Indonesia

Indonesia has a potency to produce its own propolis, however the propolis market in Indonesia is dominated by imported product, such as from Brazil. Currently, still there is no reasearch which evaluate bioactive compound and nutrient content of Indonesian Propolis (IP) compare with Brazilian Propolis (BP). The objectives of this study were to analyze bioactive compounds and nutrient contents of IP compared to BP. Bioactive compounds and nutrients content were analyzed by gas chromatography–mass spectrophotometry. The resultsshowed both IP and BP contain fenol, α-amyrin, cylolanost, and pyrimidines. Bioactive compounds which specifically found in IP were eudesmane compound, ethyl acridine, lupeol, friedooleanan; while β amyrin and cinnamic acid compound only found in BP. The nutrient contents of IP were higher than BP except for vitamin A. In conclusion, IP might have potential health benefit, similar to BP.

Analisis Keragaman Genetik Isolat Bakteri Xanthomonas oryzae pv. oryzae dari Jawa Barat dan Jawa Tengah Berdasarkan Analisis ARDRA Gen 16SrRNA Yadi Suryadi; Dwi N. Susilowati; Puji Lestari; Sutoro Sutoro; Ifa Manzila; Trini Suryani Kadir; Sheryn Sunni Albani; I Made Artika
Jurnal Fitopatologi Indonesia Vol 10 No 2 (2014)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Fifteen Xanthomonas oryzae pv. oryzae isolates from several regions in West Java and Central Java have been studied for their genetic diversity using amplified ribosomal DNA restriction analysis (ARDRA) 16SrRNA gene.Total of 13 ARDRA patterns from digestion of DNA with RsaI restriction enzyme was obtained, indicated higher genetic diversity of X. oryzae pv. oryzae. Phylogenetic analysis revealed a close genetic relationships among isolates. Isolates X. oryzae pv. oryzae 1/96pml and 61pml are closely related with isolates 29d, 59pml, and 60pml although they are isolated from different locations. The other closely related isolates were between X. oryzae pv. oryzae 5mgl with 23d, 38d, 10sbg, 8myd; while 6klt was close to 3ind and 2kr. The result of X. oryzae pv. oryzae genetic diversity can be used as a reference for strain or/isolates selection for development ofbacterial leaf blight resistance in Indonesia.

OPTIMASI PRODUKSI ENZIMATIS DIASILGLISEROL MELALUI GLISEROLISIS KONTINU [Optimization of Enzymatic Diacylglycerol Production through Continuous Glycerolysis] - Tri-Panji; Septiany C. Palilingan; I Made Artika
Jurnal Teknologi dan Industri Pangan Vol. 25 No. 1 (2014): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

OPTIMASI PRODUKSI ENZIMATIS DIASILGLISEROL MELALUI GLISEROLISIS KONTINU[Optimization of Enzymatic Diacylglycerol Production through Continuous Glycerolysis]Tri-Panji1)*, Septiany C. Palilingan2) dan I Made Artika2)1) Balai Penelitian Bioteknologi Perkebunan Indonesia, Jl. Taman Kencana No. 1 Bogor2) Departemen Biokimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Bogor Diterima 24 Juni 2013 / Disetujui 10 Februari 2014ABSTRACT Diacylglycerol (DAG) produced from crude palm oil (CPO) is one of the healthy oils that can be consumed for daily human diet. DAG production in Indonesia is constrained by the high cost of the mostly imported lipase. To overcome this problem, research of DAG production has been carried out using crude extracts of lipase produced by local species of fungi Rhizopus oryzae. This study aims to develop a continuous process of enzymatic glycerolysis of CPO for DAG production; to establish optimum conditions of DAG production which includes flow rate of CPO and glycerolysis time; and to test the performance of lipase from the local mold R. oryzae in catalyzing continuous process of glycerolysis for the production of DAG. Lipase isolation was carried out by acetone precipitation and lipase was used as a catalyst in the continuous glycerolysis process. The glycerolysis was conducted by reacting CPO with glycerol continuously at various time periods. The optimum condition of automatic continuous glycerolysis process was achieved at a CPO flow rate of 3 mL/min with a glycerolysis time at the 18 cycles (9 hours). The conversion of DAG was 29%. The performance of lipase was proven to remain stable up to 3 times changes of CPO substrate for 9 hours of glycerolysis process with the best condition at the 3 cycles and can improved conversion of DAG until 37%.

Phytochemical Analysis, α-glucosidase Inhibition Activity in-vitro and Enzyme Kinetics of Ethyl Acetate and Hexane Extracts of Graptophylum pictum (L.) Griff Waras Nurcholis; I Made Artika; Djarot Sasongko Hami Seno; Dimas Andrianto; Apipah Aprianti; Fina Febrianti; Inawati Inawati; Antonius Padua Ratu; Arya Arendra
Current Biochemistry Vol. 1 No. 2 (2014)
Publisher : IPB University

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The species Graptophylum pictum (L.) Griff, also known as “daun ungu” in Indonesia, is a traditional herbaceous plant believed to have antidiabetic potential. The number of people in the world with diabetes has increased dramatically over the recent years. The treatment of type II diabetes is complicated by several factors inherent to the disease. Elevated postprandial hyperglycemia is one of the risk factors and the intestinal digestive enzyme α-glucosidase plays a vital role in carbohydrate metabolism. One of the antidiabetic therapeutic approaches which reduces the postprandial glucose level in blood is by the inhibition of α-glucosidase. In this study, phytochemical analysis, α- glucosidase inhibitory activity and enzyme kinetics of ethyl acetate- and hexane extracts of G. pictum were evaluated with the aim to analyze its antidiabetic potential. Phytochemical analysis revealed the presence of tannins, steroids, and alkaloids. Steroids were present in ethyl acetate extract but absent in hexane extract, while alkaloids were present in hexane extract but absent in ethyl acetate extract. The ethyl acetate and hexane extracts had 30.68 and 49.82 % inhibitory effect on α-glucosidase activity respectively. The kinetics of glucosidase enzyme of ethyl acetate and hexane extracts were determined by Lineweaver Burk plots. These exhibited uncompetitive and noncompetitive inhibition to alpha-glucosidase activity respectively. From the enzyme assay, we infer that ethyl acetate and hexane extracts of G. pictum contain potential α-glucosidase inhibitors that have the potential to be exploited for use in the treatment of diabetes

Isolation and Selection of Thermophilic Bacteria as Hexavalent Chromium Reducer from Batik Processing Waste Water Wijiastuti Wijiastuti; I Made Artika; Novik Nurhidayat
Current Biochemistry Vol. 2 No. 1 (2015)
Publisher : IPB University

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Hexavalent chromium (Cr VI) in the oxidized state is carcinogenic in humans. Chromium is widely used in various industries, and therefore Cr (VI) can be found in wastes from the industry. Heavy metal Cr (VI) waste, is one type of hazardous wastes, due to the high toxicity of Cr (VI) which is much higher than that of Cr (III). This study was conducted to isolate naturally occurring bacteria from batik wastewater with ability to reduce Cr (VI). Identification of chromate reductase gene was carried out using qPCR method. Results showed that three isolates Bacillus sp.1a, Pseudomonas sp.1b, dan Geobacillus sp.1c have chromate reductase-coding genes. Based on the results of qPCR analysis, the isolate Bacillus sp.1a was predicted to have the highest reduction activity. Hence, this isolate was then subjected to Cr(VI) reduction activity test.

Activity of Skin Secretions of Frog Fejervarya limnocharis and Limnonectes macrodon against Streptococcus pneumoniae Multidrug Resistant and Molecular Analysis of Species F. limnocharis Jajang Suhyana; I Made Artika; Dodi Safari
Current Biochemistry Vol. 2 No. 2 (2015)
Publisher : IPB University

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Indonesia has about 450 frog species which is approximately 20% of frog species in the world. Among frog species found in Indonesia are Fejervarya limnocharis dan Limnonectes macrodon belonging to family Dicroglossidae. Frog skin secretion is considered to have a potency to be used as an alternative source of antibacterial agent against Streptococcus pneumoniae multidrug resistant (MDR). The aims of the present study were to analyze antibacterial activity of skin secretions of F. limnocharis and L. macrodon against S. pneumoniae multidrug resistant (MDR) and conduct molecular phylogenetic analysis of the frog used to ensure classification of frog species. The release of skin secretion was stimulated using epinephrine injection. Antibacterial activity of the skin secretions was tested using the well and paper disc methods. Results showed that skin secretions of F. limnocharis have antibacterial activity against S. pneumoniae multidrug resistant (MDR) SPN1307. The activity, however, was lower compared to that of chloramphenicol in both well and paper disc methods. On the other hand, skin secretions of L. macrodon failed to inhibit the growth of S. pneumoniae multidrug resistant (MDR) SPN1307. Molecular phylogenetic analysis was carried out on F. limnocharis based on DNA sequence of a partial fragment of mitochondrial cytochrome oxidase subunit I (COI) gene. Results showed that the frog F. limnocharis is closely related (97%) to Fejervarya sp from Bali. Skin secretions of F. limnocharis, therefore, has the potency to be developed as a source of antibacterial agents against S. pneumoniae multidrug resistant (MDR) SPN1307.

Co-Authors . SURYANI A. E. Zainal Hasan AA Sudharmawan, AA Abdul Choliq ADINDA VIRGINIA DWI SETYO Agung Eru Wibowo AHMAD ENDANG ZAINAL HASAN AHMAD ENDANG ZAINAL HASAN Ahmad Sulaeman Akhmad Endang Zainal Hasan Amanda, Nisa Widya AMIN FATONI Andani, Gita Putri Andita Fitri Mutiara Rizki, Andita Fitri Mutiara Antonius Padua Ratu Apipah Aprianti Apon Zaenal Mustopa APON ZAENAL MUSTOPA Arya Arendra Asri Sulfianti Azmi Azhari Azmi Azhari, Azmi Azmi, Wihda Aisarul BUGI RATNO BUDIARTO DEDI JUSADI Denny Irawati Desi Purwaningsih Dewi Sukma Dhani Luthfi Ramadhani DIMAS ANDRIANTO Djarot Sasongko Hami Seno Dodi Safari Dodi Safari Dodi Safari Dodi Safari Dwi N. Susilowati Dzihan Dinar Rabani Eliza Halim Erismar Amri Erlank Bagjavicenna Erna Puspasari Evi Nur Qolbaini Fatriani, Rizka Fina Febrianti Firda DIMAWARNITA Fri Rahmawati Gusnia Meilin Gholam Gusnia Meilin Gholam Gusnia Meilin Gholam H. A. E. Zainal Hasan Hafizh Zahra Hani 'Athiyya Rafi Hardinsyah Harsana, Ngurah HARTUTIK EKA SUSANTI HARYANTO SUSILO Hasim - HASIM DANURI Hayatul Rahmi Herti Sugiarti Herti Sugiarti, Herti Hyakansa HANIF Ifa Manzila Iman Akhyar Firdausy Iman Rusmana Inawati Inawati Jajang Suhyana K, Popi A Kurnia Agustini Laita Nurjanah Laita Nurjanah, Laita LAKSMI AMBARSARI Lasmiyanti, Metty Lusiana Kresnawati Hartono Luzicoiij, Michael Edison M. Zairin Junior M.Pd Prof. Dr. I Nyoman Sudiana . Mala Nurilmala MARIA BINTANG Meilisza, Nina Melva Louisa Mirza Dikari Kusrini MS, Yulia Atika Muhaimin Muhaimin MUHAMMAD AGUS SUPRAYUDI Muhammad Dailami, Muhammad Muhammad Nafiz Nisa Widya Amanda Noorwati Sutandyo Norman Razief Azwar Norman Razief Azwar Novik Nurhidayat Novik Nurhidayat Nuke Annisa Nasution NUNUK WIDHYASTUTI Nur Bambang Priyo Utomo Nur Hasanah Nurmala Sari Nurul Khumaida Perkasa Arian Puji Lestari Rahadian Pratama Rahmawati, Fri Ramadhani Malik Abdillah Rava Raisha Putra Resti Rahmawati Putri Ridwan Putra Firmansyah Rini Kurniasih, Rini Riyan Alifbi Putera Irsal Rizka Fatriani Roedhy Poerwanto Septiany C. Palilingan Sheryn Sunni Albani Siagian, Putri Junita Siregar, Josephine Elizabeth Siti Nurjanah Siti Nurjanah Soekarno Mismana Putra Soekarno Mismana Putra, Soekarno Mismana Sogandi Sogandi Sogandi Sogandi Sudarsono Suharyanto Suharyanto Sulistiani sulistiani Suryani Suryani Suryani Suryani Suryani Suryo Wiyono Sutoro Sutoro Syaeful Abidin Syamsul Falah Tatik Khusniati Tetty Chaidamsari Tetty Chaidamsari, Tetty Tri Panji Trini Suryani Kadir Vita Rosaline Fahri Waras Nurcholis Wasrin Syafii Wijiastuti Wijiastuti Yadi Suryadi Yahdiana Harahap Yulianto YUNITA ARIAN SANI ANWAR

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