Hasil Pencarian  ::  Simpan CSV :: Kembali

"This brief reports on the interplay of an amino-acid mutation towards substrate which could lead to enhanced effects on mutant. These effects need to be given consideration in the engineering processes of protein stability and further exploration of such learning are required to provide novel indication for selection of an enzymes. There are very few reports showing such stable, energy efficient model towards improved protein function prediction screening in-silico structure based mutagenesis of xylanases from Thermomyces lanuginosus​"

"Enzim merupakan biokatalis yang banyak dimanfaatkan dalam industri sebagai alternatif dari penggunaan bahan-bahan kimia yang mencemari lingkungan, salah satu diantaranya adalah enzim xilanase. Xilanase dalam industri dapat digunakan dalam proses pemutihan kertas, campuran pakan ternak, penjernihan sirup, produksi gula xilosa, dan sebagainya. Teknologi proses dalam industri umumnya dilakukan pada suhu dan pH yang tinggi, oleh karena itu dibutuhkan xilanase yang bersifat alkalotermofilik. Teknologi DNA rekombinan dilakukan agar enzim yang diproduksi mudah dimanipulasi dan dikembangkan untuk efesiensi. Laboratorium Teknologi Bioindustri, Pusat Laboratorium Bioindustri, Badan Pengkajian dan Penerapan Teknologi (BPPT) yang berada di Puspiptek, Serpong, Jawa Barat telah mengisolasi isolat CMU dari Sumber Air Panas Cimanggu yang positif menghasilkan xilanase alkalotermofilik. Tujuan penelitian ini adalah untuk melakukan kloning gen penyandi enzim xilanase alkalotermofilik serta ekspresi enzim rekombinannya pada Escherichia coli. Hasil identifikasi daerah 16S rRNA secara parsial pada isolat ini menunjukkan bahwa isolat CMU berafiliasi pada Bacillus halodurans. Gen penyandi xilanase alkalotermofilik telah berhasil diamplifikasi dari genom isolat CMU dan dikloning ke dalam E.coli DH5α dengan menggunakan vektor pGEM-T Easy. Dari proses transformasi hasil ligasi vektor dan produk PCR menghasilkan 2 bakteri rekombinan, yang membawa gen xilanase yang mempunyai perbedaan sekuens, dinamakan Klon 2 dan Klon 3. Analisa aktivitas produk gen dari E.coli DH5α rekombinan Klon 2 dan Klon 3 menunjukkan bahwa bakteri rekombinan ini menghasilkan enzim xilanase yang alkalotermofilik dengan profil berbeda. Aktivitas enzim xilanase pada Klon 2 optimal pada pH 11 dan suhu 70oC (16,52 U/mg) sedangkan Klon 3 optimal pada pH 8 dan suhu 60oC (17,65 U/mg).

---

Enzyme known as a catalyst that has been widely used in industries as an alternative of chemicals process that polluted the environment. One of the important enzymes in industries is xylanase enzyme. Xylanase in industry can be used for bleaching process of pulp, rarefaction of syrup, producing of xylose sugar, mixed fodder, and so forth. Technology process in industry are generally conducted at high temperature and pH. Therefore, it requires a xylanase that has alkalothermophilic character. Recombinant DNA technology can make the gene product easily manipulated for efficiency. Center for Bio-industrial technology, The Agency for the Assessment and Application of Technology (BPPT) has isolated an isolate from Cimanggu Hot Spring that potentially produced an alkalothermophilic xylanase. The isolate designed as CMU.

The purpose of this study is to clone the encoding gene of alkalothermophilic xylanase and to express this gene in Escherichia coli. The region identification result of 16S rRNA of this isolate showed that the CMU isolate is closed relative to Bacillus halodurans species. The gene encoding for alkalothermophilic xyalanase has been amplified from chromosomal DNA of CMU isolate and succesfully cloned into E.coli DH5α using the pGEM-T Easy vector. The ligation and transformation produces two recombinant bacteria with different sequence, namely Clone- 2 and Clone- 3. Xylanase activity assay showed that both recombinant E. coli have xylanase activity. The maximum activity of xylanase in clone-2 and clone-3 were reached at pH 11 and 700C (16.52 U/mg), and at pH 8 and 600C (17.65 U/mg), respectively."

"The LNCS journal Transactions on Computational Systems Biology is devoted to inter- and multidisciplinary research in the fields of computer science and life sciences and supports a paradigmatic shift in the techniques from computer and information science to cope with the new challenges arising from the systems oriented point of view of biological phenomena. This, the 14th Transactions on Computational Systems Biology volume, guest edited by Ion Petre and Erik de Vink, focuses on computational models for cell processes and features a number of carefully selected and enhanced contributions, initially presented at the CompMod workshop, which took place in Aachen, Germany, in September 2011. The papers, written from different points of view and following various approaches, cover a wide range of topics within the field of modeling and analysis of biological systems. In addition, two regular submissions deal with models of self-assembling systems and metabolic constraints on the evolution of genetic codes."

"Computational modeling is emerging as a powerful new approach to study and manipulate biological systems. Multiple methods have been developed to model, visualize, and rationally alter systems at various length scales, starting from molecular modeling and design at atomic resolution to cellular pathways modeling and analysis. Higher time and length scale processes, such as molecular evolution, have also greatly benefited from new breeds of computational approaches. This book provides an overview of the established computational methods used for modeling biologically and medically relevant systems."

"Brazilian Symposium on Bioinformatics covers all aspects of bioinformatics and computational biology, including sequence analysis, motifs, and pattern matching, biological databases, data management, data integration, and data mining, biomedical text mining, structural, comparative, and functional genomics, personal genomics, protein structure, modeling, and simulation, gene identification, regulation and expression analysis, gene and protein interaction and networks, molecular docking, molecular evolution and phylogenetics, computational systems biology, computational proteomics, statistical analysis of molecular sequences, algorithms for problems in computational biology, applications in molecular biology, biochemistry, genetics, medicine, microbiology and associated subjects."

"This book constitutes the refereed proceedings of the 16th Annual International Conference on Research in Computational Molecular Biology, RECOMB 2012, held in Barcelona, Spain, in April 2012. The 31 revised full papers presented together with 5 keynote lectures were carefully reviewed and selected from 200 submissions. The papers feature current research in all areas of computational molecular biology, including, molecular sequence analysis, recognition of genes and regulatory elements, molecular evolution, protein structure, structural genomics, analysis of gene expression, biological networks, sequencing and genotyping technologies, drug design, probabilistic and combinatorial algorithms, systems biology, computational proteomics, structural and functional genomics, and information systems for computational biology and imaging."

""Computational biology drives discovery through its use of high-throughput informatics approaches. This book provides a road map of the current drug development process and how computational biology approaches play a critical role across the entire drug discovery pipeline. Through the use of previously unpublished, real-life case studies the impact of a range of computational approaches are discussed at various phases of the pipeline. Additionally, a focus section provides innovative visualisation approaches, from both the drug discovery process as well as from other fields that utilise large datasets, recognising the increasing use of such technology. Serving the needs of early career and more experienced scientists, this up-to-date reference provides an essential introduction to the process and background of drug discovery, highlighting how computational researchers can contribute to that pipeline"--Provided by publisher."

"Proses produksi pada reaktor biogas dari limbah cair pabrik kelapa sawit atau Palm Oil Mill Effluent (POME) sering menghadapi masalah karena keterbatasan laju hidrolisis. Keterbatasan ini terjadi akibat terbentuknya lumpur dan gumpalan yang mengurangi voulme efektif digester biogas serta mengurangi potensi biogas yang dihasilkan. Lumpur dan gumpalan yang dihasilkan berasal dari tingginya kandungan dan juga serat yang ada pada POME. Berbagai upaya telah dilakukan seperti pengambilan secara manual maupun pengadukan secara mekanik atau dengan turbulensi melalui pemompaan cairan dengan kuat. Namun, upaya tersebut memerlukan tambahan alat, SDM dan energi sehingga biaya proses produksi terus meningkat. Sebagai alternatif lain, maka pemanfaatan lipase dan xilanase menjadi alternatif yang menjanjikan untuk pretreatment yang dapat meminimalisir kandungan padatan hemiselulosa dan minyak atau lemak di dalam POME. Lipase dapat menghidrolisa lemak dan minyak menjadi asam lemak rantai pendek dan xilanase dapat menghidrolisa hemiselulosa menjadi monomernya, sehingga memudahkan produksi biogas. Pada penelitian ini telah terbukti bahwa pretreatment dengan xilanase dan lipase mampu menurunkan total suspended solid (TSS) sebesar 49,21 %; total solid (TS) sebesar 34, 52 % dan meningkatkan gula pereduksi sebesar 44,37 %, selain itu mampu menurunkan minyak dan lemak sebesar 88,82 pada konsentrasi 4 %. Serta menignkatkan produksi biogas sebanyak 52,17 % dan penghilangan chemical oxygen demand (COD) sebesar 49,7 %.

---

The production process at biogas reactors from Palm Oil Mill Effluent (POME) often faces problems due to limited hydrolysis rates. This limitation occurs due to the formation of mud and lumps which reduce the effective volume of the biogas digester and reduce the potential for biogas produced. The sludge and lumps produced come from the high content and fiber present in the POME. Various treatments have been made such as manual extraction or mechanical stirring or by turbulence through strong fluid pumping. However, these treatments require additional tools, human resources and energy so the production process costs continue to increase. As an alternative, the use of lipase and xylanase is a promising alternative for pretreatment that can minimize the content of hemicellulose and oil or fat in POME. Lipase can hydrolyze fat and oil into short-chain fatty acids and xylanase can hydrolyze hemicellulose into its monomer, thus facilitating biogas production. In this study it was proven that pretreatment with xylanase and lipase was able to reduce total suspended solid (TSS) by 49.21%; total solid (TS) of 34, 52% and increasing reducing sugar by 44.37%, besides that it can reduce oil and fat by 88.82 % at a concentration of 4%. As well as increasing biogas production by 52.17% and removal chemical oxygen demand (COD) by 49.7%."