Article
Biochemistry & Molecular Biology
Katarina Suchova, Vladimir Puchart, Nikolaj Spodsberg, Kristian B. R. Morkeberg Krogh, Peter Biely
Summary: Catalytic properties of GH30 xylanases vary greatly, with some enzymes being specific glucuronoxylanases and others nonspecific xylanases. Methylation or reduction of glucuronic acid has a significant impact on the activity of specific enzymes, while carboxyl group modification has a minor effect on the action of most enzymes.
Article
Biotechnology & Applied Microbiology
Eiji Ishikawa, Masakazu Ikeda, Hidetsugu Sotoya, Minako Anbe, Hoshitaka Matsumoto, Mayumi Kiwaki, Hiroshi Hatano
Summary: Cell-bound beta-glycosidases from basidiomycetous yeasts have potential as biocatalysts in galactooligosaccharide (GOS) production. Among the identified BglA enzymes, Se-BglA showed the highest thermostability and GOS yield, making it the most promising enzyme for industrial applications.
JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Anders Lonstrup Hansen, Johanna M. Koivisto, Signe Simonsen, Zehui Dong, Ramon Crehuet, Dennis K. Hansen, Martin Willemoes
Summary: The study identified the importance of Asp-682 and a conserved water molecule in the activation of the catalytic nucleophile in endo-alpha-N-acetylgalactosaminidase EngBF. Mutagenesis experiments showed that His-685, His-718, and the catalytic water molecule are also crucial for catalytic activity.
Article
Biochemistry & Molecular Biology
Bartlomiej M. Kolaczkowski, Christian Jorgensen, Nikolaj Spodsberg, Mary A. Stringer, Nitin T. Supekar, Parastoo Azadi, Peter Westh, Kristian B. R. M. Krogh, Kenneth Jensen
Summary: Glycoengineering allows control over glycosylation patterns to generate new glycoprotein variants with desired properties. Challenges include glycan heterogeneity and nonnative glycan chains introduced by heterologous protein expression. Partial trimming or complete removal of glycan chains can address these challenges.
Article
Biochemistry & Molecular Biology
Marco Mangiagalli, Michela Lapi, Serena Maione, Marco Orlando, Stefania Brocca, Alessandra Pesce, Alberto Barbiroli, Carlo Camilloni, Sandra Pucciarelli, Marina Lotti, Marco Nardini
Summary: Psychrophilic organisms produce enzymes with high specific activity at low temperatures to adapt to cold environments. The GH42 beta-galactosidase from Marinomonas ef1 exhibits cold activity and robustness, possibly evolving from a thermostable scaffold. Its unique hexameric arrangement and large central cavity contribute to substrate accessibility, with a peculiar cooperative behavior likely related to internal cavity permeability increase triggered by heating. These findings challenge the traditional view of cold activity coupled with intrinsic thermolability.
Article
Microbiology
Anke Chen, Dan Wang, Rui Ji, Jixi Li, Shaohua Gu, Rong Tang, Chaoneng Ji
Summary: In this study, a thermostable beta-glucosidase (TsBGL) was isolated and characterized from the Thermoprotei Thermofilum sp. ex4484_79, exhibiting high activity and specific activity at elevated temperatures and pH levels. The crystal structure of TsBGL reveals a classical (alpha/beta)(8)-barrel catalytic domain, with catalytic sites including Glu210 and Glu414. TsBGL shows promise for potential industrial applications with its high thermostability and catalytic activity.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Malene Bech Vester-Christensen, Jesper Holck, Martin Rejzek, Lea Perrin, Morten Tovborg, Birte Svensson, Robert A. Field, Marie Sofie Moller
Summary: A study found that the enzyme HvLD from barley showed a preference for pNP maltoside as both acceptor and donor, and exhibited excellent activity when pullulan or its fragment was used as the donor. In addition, HvLD could use a-maltosyl fluoride as a donor and maltose as the best acceptor. The findings provide insights for the production of glycoconjugate compounds with novel glycosylation patterns using natural donors.
Article
Multidisciplinary Sciences
Matthew C. Deen, Yanping Zhu, Christina Gros, Na Na, Pierre-Andre Gilormini, David L. Shen, Sandeep Bhosale, Nadia Anastasi, RuiQi Wang, Xiaoyang Shan, Eva Harde, Ravi Jagasia, Francis C. Lynn, David J. Vocadlo
Summary: In this study, a selective fluorescence-quenched substrate, LysoFQ-GBA, was developed to measure the levels of lysosomal GCase activity in living cells. The substrate can be used with fluorescence microscopy or flow cytometry to study the effects of chemical or genetic perturbations on GCase activity. The measurements made using LysoFQ-GBA were validated with different cell types and were shown to accurately report on GCase inhibitor target engagement and the GBA allele status of cells.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Multidisciplinary
Phillip M. Danby, Andrew Jeong, Lyann Sim, Ryan P. Sweeney, Jacob F. Wardman, Ryan Karimi, Andreas Geissner, Liam J. Worrall, Jolene. P. Reid, Natalie C. J. Strynadka, Stephen G. Withers
Summary: The suitably configured allyl ethers of unsaturated cyclitols can be used as substrates of beta-glycosidases, with the incorporation of halogens and activated leaving groups generating potent inactivators of the enzymes. Surprisingly, the halogenated cyclitols displayed an unexpected trend in enzymatic turnover, with the most electronegative substituents yielding the most labile pseudo-glycosidic linkages. Mutations in the enzyme revealed the importance of specific interactions in determining the enzyme's selectivity for hydrolyzing unsaturated cyclitol ethers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Environmental Sciences
Hajer Ben Hlima, Aida Karray, Mouna Dammak, Fatma Elleuch, Philippe Michaud, Imen Fendri, Slim Abdelkafi
Summary: This study demonstrated the importance of amylases in modern biotechnology by enhancing starch production and amylase detection from Chlorella vulgaris through a three-stage growth mode. Through bioinformatic tools, multiple putative genes encoding different types of amylases were identified in C. vulgaris, showing both differences and common features among these proteins.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Jorick Franceus, Jolien Lormans, Lore Cools, Matthias D'hooghe, Tom Desmet
Summary: The study demonstrates significant phosphorylase activity can be established in GH3 glycoside hydrolases through single-site substitutions and further optimized through mutational paths. These findings suggest new insights into developing phosphorylases and provide a novel approach for future research in this field.
Article
Biochemistry & Molecular Biology
Na Ra Shin, Daniel Doucet, Yannick Pauchet
Summary: The evolution of GH5_2 cellulases in Cerambycidae (longhorned beetles) has been shaped by gene duplication and horizontal gene transfer (HGT). These digestive enzymes have contributed to the ability of these beetles to feed on a plant cell wall-rich diet. Ancestral gene duplications led to distinct groups of enzymes with different substrate specificities, allowing the beetles to break down various polysaccharides. Recent gene duplications have further expanded the catalytic repertoire of these enzymes.
MOLECULAR BIOLOGY AND EVOLUTION
(2022)
Article
Biochemistry & Molecular Biology
Nardiah Rizwana Jaafar, Siti Norbaidurah Ayob, Noor Hidayah Abd Rahman, Farah Diba Abu Bakar, Abdul Munir Abdul Murad, Rosli Md Illias
Summary: Through rational protein engineering, the catalytic efficiency of Aspergillus niger alpha-L-arabinofuranosidase towards pre-treated kenaf hemicellulose hydrolysis was improved, with the variant E449D/W453Y showing the highest hydrolysis of hemicellulose by producing up to 62% reducing sugar. Substituting amino acids at the substrate binding site reduces steric hindrance, allowing easier penetration of insoluble substrate to complement the enzyme's active site.
PROCESS BIOCHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Nicholas G. S. McGregor, Joan Coines, Valentina Borlandelli, Satoko Amaki, Marta Artola, Alba Nin-Hill, Daniel Linzel, Chihaya Yamada, Takatoshi Arakawa, Akihiro Ishiwata, Yukishige Ito, Gijsbert A. van der Marel, Jeroen D. C. Codee, Shinya Fushinobu, Herman S. Overkleeft, Carme Rovira, Gideon J. Davies
Summary: The discovery of zinc-dependent retaining glycoside hydrolases presents unresolved mechanistic questions, particularly the controversy surrounding the proposed mechanism involving a zinc-coordinated cysteine nucleophile and a thioglycosyl enzyme intermediate. A synthesized beta-l-arabinofuranosidase inhibitor reacts exclusively with the cysteine thiol catalytic nucleophiles of GH families 127 and 146, supporting further research into the breakdown of the thioglycosyl enzyme intermediate. X-ray crystal structures and simulations provide insight into the mechanisms of zinc-coordinated cysteine as the catalytic nucleophile and the energetics of this unique metalloenzyme clan.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Agricultural Engineering
Roent Dune A. Cayetano, Jungsu Park, Gi-Beom Kim, Ju-Hyeong Jung, Sang-Hyoun Kim
Summary: Bioaugmentation with hydrolytic bacteria and Clostridium sp. enhanced methane conversion of waste-activated sludge, changing the main methanogenic pathway and microbial species. Increased expression of hydrolases was found to play a key role in improving methane conversion efficiency through bioaugmentation.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Saurabh Sudha Dhiman, Jung-Rim Haw, Dayanand Kalyani, Vipin C. Kalia, Yun Chan Kang, Jung-Kul Lee
BIORESOURCE TECHNOLOGY
(2015)
Review
Biotechnology & Applied Microbiology
Line Munk, Anna K. Sitarz, Dayanand C. Kalyani, J. Dalgaard Mikkelsen, Anne S. Meyer
BIOTECHNOLOGY ADVANCES
(2015)
Article
Biotechnology & Applied Microbiology
Gerdt Muller, Dayanand Chandrahas Kalyani, Svein Jarle Horn
BIOTECHNOLOGY AND BIOENGINEERING
(2017)
Article
Chemistry, Multidisciplinary
Dayanand C. Kalyani, Tomaz Fakin, Svein Jarle Horn, Roman Tschentscher
Article
Biotechnology & Applied Microbiology
Daniel Girma Mulat, Silvia Greses Huerta, Dayanand Kalyani, Svein Jarle Horn
BIOTECHNOLOGY FOR BIOFUELS
(2018)
Article
Biotechnology & Applied Microbiology
Dhivya Ramakrishnan, Manish K. Tiwari, Gomathi Manoharan, Thiagarajan Sairam, Rajesh Thangamani, Jung-Kul Lee, Jeya Marimuthu
ENZYME AND MICROBIAL TECHNOLOGY
(2018)
Article
Multidisciplinary Sciences
Tom Reichenbach, Dayanand Kalyani, Rosaria Gandini, Olov Svartstrom, Henrik Aspeborg, Christina Divne
Article
Forestry
Ida Aarum, Anders Solli, Hoerdur Gunnarsson, Dayanand Kalyani, Hanne Devle, Dag Ekeberg, Yngve Stenstrom
WOOD SCIENCE AND TECHNOLOGY
(2019)
Article
Biotechnology & Applied Microbiology
Meenu Subrahmanian, Jeya Marimuthu, Thiagarajan Sairam, Ramalingam Sankaran
BIOTECHNOLOGY LETTERS
(2020)
Article
Biochemistry & Molecular Biology
Ramasamy Shanmugam, In-Won Kim, Manish K. Tiwari, Hui Gao, Primata Mardina, Devashish Das, Anurag Kumar, Marimuthu Jeya, Sang-Yong Kim, Young Sin Kim, Jung-Kul Lee
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2020)
Article
Biotechnology & Applied Microbiology
Nishanthika Thenmozhi Kulasekaran, Mary Leema Thilakam, Dharani Gopal, Jung-Kul Lee, Jeya Marimuthu
Summary: This study successfully constructed a resveratrol production pathway in yeast and achieved denovo production of resveratrol using seaweed extract as the fermentation medium. By introducing different genes and optimizing the transformed strains, resveratrol was successfully produced.
BIOTECHNOLOGY LETTERS
(2023)
Article
Entomology
Mahesh B. Gaikwad, Santosh C. Kedar, Dayanand C. Kalyani, Pathour R. Shashank
Summary: This study reports the first record of Eublemma scitula preying on the invasive barnacle scale insects in India. The study also observed the peak predatory activity of E. scitula in mid-July.
EGYPTIAN JOURNAL OF BIOLOGICAL PEST CONTROL
(2022)
Article
Biotechnology & Applied Microbiology
Gomathi Manoharan, Thiagarajan Sairam, Rajesh Thangamani, Dhivya Ramakrishnan, Manish K. Tiwari, Jung-Kul Lee, Jeya Marimuthu
ENZYME AND MICROBIAL TECHNOLOGY
(2019)
Article
Energy & Fuels
Dayanand Chandrahas Kalyani, Mirzaman Zamanzadeh, Gerdt Mueller, Svein J. Horn
Article
Chemistry, Multidisciplinary
D. C. Kalyani, L. Munk, J. D. Mikkelsen, A. S. Meyer