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Melo RLF, Sales MB, de Castro Bizerra V, de Sousa Junior PG, Cavalcante ALG, Freire TM, Neto FS, Bilal M, Jesionowski T, Soares JM, Fechine PBA, Dos Santos JCS. Recent applications and future prospects of magnetic biocatalysts. Int J Biol Macromol 2023; 253:126709. [PMID: 37696372 DOI: 10.1016/j.ijbiomac.2023.126709] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/25/2023] [Accepted: 09/03/2023] [Indexed: 09/13/2023]
Abstract
Magnetic biocatalysts combine magnetic properties with the catalytic activity of enzymes, achieving easy recovery and reuse in biotechnological processes. Lipases immobilized by magnetic nanoparticles dominate. This review covers an advanced bibliometric analysis and an overview of the area, elucidating research advances. Using WoS, 34,949 publications were analyzed and refined to 450. The prominent journals, countries, institutions, and authors that published the most were identified. The most cited articles showed research hotspots. The analysis of the themes and keywords identified five clusters and showed that the main field of research is associated with obtaining biofuels derived from different types of sustainable vegetable oils. The overview of magnetic biocatalysts showed that these materials are also employed in biosensors, photothermal therapy, environmental remediation, and medical applications. The industry shows a significant interest, with the number of patents increasing. Future studies should focus on immobilizing new lipases in unique materials with magnetic profiles, aiming to improve the efficiency for various biotechnological applications.
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Affiliation(s)
- Rafael Leandro Fernandes Melo
- Departamento de Engenharia Metalúrgica e de Materiais, Universidade Federal do Ceará, Campus do Pici, Bloco 729, Fortaleza CEP 60440-554, CE, Brazil; Grupo de Química de Materiais Avançados (GQMat), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, Fortaleza CEP 60451-970, CE, Brazil
| | - Misael Bessa Sales
- Instituto de Engenharias e Desenvolvimento Sustentável, Universidade da Integração Internacional da Lusofonia Afro-Brasileira, Campus das Auroras, Redenção CEP 62790-970, CE, Brazil
| | - Viviane de Castro Bizerra
- Instituto de Engenharias e Desenvolvimento Sustentável, Universidade da Integração Internacional da Lusofonia Afro-Brasileira, Campus das Auroras, Redenção CEP 62790-970, CE, Brazil
| | - Paulo Gonçalves de Sousa Junior
- Departamento de Química Orgânica e Inorgânica, Centro de Ciências, Universidade Federal do Ceará, Campus Pici, Fortaleza CEP 60455-760, CE, Brazil
| | - Antônio Luthierre Gama Cavalcante
- Departamento de Química Analítica e Físico-Química, Centro de Ciências, Universidade Federal do Ceará, Campus Pici, Fortaleza CEP 60455-760, CE, Brazil
| | - Tiago Melo Freire
- Grupo de Química de Materiais Avançados (GQMat), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, Fortaleza CEP 60451-970, CE, Brazil; Departamento de Química Analítica e Físico-Química, Centro de Ciências, Universidade Federal do Ceará, Campus Pici, Fortaleza CEP 60455-760, CE, Brazil
| | - Francisco Simão Neto
- Departamento de Engenharia Química, Universidade Federal do Ceará, Campus do Pici, Bloco 709, Fortaleza CEP 60455-760, CE, Brazil
| | - Muhammad Bilal
- Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, G. Narutowicza 11/12 Str., 80-233 Gdansk, Poland
| | - Teofil Jesionowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland
| | - João Maria Soares
- Departamento de Física, Universidade do Estado do Rio Grande do Norte, Campus Mossoró, Mossoró CEP 59610-090, RN, Brazil
| | - Pierre Basílio Almeida Fechine
- Grupo de Química de Materiais Avançados (GQMat), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, Fortaleza CEP 60451-970, CE, Brazil; Departamento de Química Analítica e Físico-Química, Centro de Ciências, Universidade Federal do Ceará, Campus Pici, Fortaleza CEP 60455-760, CE, Brazil
| | - José Cleiton Sousa Dos Santos
- Instituto de Engenharias e Desenvolvimento Sustentável, Universidade da Integração Internacional da Lusofonia Afro-Brasileira, Campus das Auroras, Redenção CEP 62790-970, CE, Brazil; Departamento de Engenharia Química, Universidade Federal do Ceará, Campus do Pici, Bloco 709, Fortaleza CEP 60455-760, CE, Brazil.
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Kalapothakis Y, Miranda K, Molina DAM, Conceição IMCA, Larangote D, Op den Camp HJM, Kalapothakis E, Chávez-Olórtegui C, Borges A. An overview of Tityus cisandinus scorpion venom: Transcriptome and mass fingerprinting reveal conserved toxin homologs across the Amazon region and novel lipolytic components. Int J Biol Macromol 2023; 225:1246-1266. [PMID: 36427608 DOI: 10.1016/j.ijbiomac.2022.11.185] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 11/09/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022]
Abstract
Tityus cisandinus, a neglected medically important scorpion in Ecuadorian and Peruvian Amazonia, belongs to a complex of species related to the eastern Amazon endemic Tityus obscurus, spanning a distribution of ca. 4000 km. Despite high morbidity and mortality rates, no effective scorpion antivenom is currently available in the Amazon region. Knowledge of the structural/functional relationships between T. cisandinus venom components and those from related Amazonian species is crucial for designing region-specific therapeutic antivenoms. In this work, we carried out the first venom gland transcriptomic study of an Amazonian scorpion outside Brazil, T. cisandinus. We also fingerprinted its total venom through MALDI-TOF MS, which supported our transcriptomic findings. We identified and calculated the expression level of 94 components: 60 toxins, 25 metalloproteases, five disulfide isomerases, three amidating enzymes, one hyaluronidase, and also uncovered transcripts encoding novel lipolytic beta subunits produced by New World buthid scorpions. This study demonstrates the high similarity between T. cisandinus and T. obscurus venoms, reinforcing the existence of a neglected complex of genetically and toxinologically related Amazonian scorpions of medical importance. Finally, we demonstrated the low recognition of currently available therapeutic sera against T. cisandinus and T. obscurus venoms, and concluded that these should be improved to protect against envenomation by Amazonian Tityus spp.
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Affiliation(s)
- Yan Kalapothakis
- Departamento de Genética, Ecologia e Evolução, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Kelton Miranda
- Departamento de Genética, Ecologia e Evolução, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Denis Alexis Molina Molina
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Izabela Mamede Costa Andrade Conceição
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Débora Larangote
- Departamento de Genética, Ecologia e Evolução, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Huub J M Op den Camp
- Department of Microbiology, Faculty of Science, Radboud University Nijmegen, Heyendaalseweg 135, NL-6525 AJ Nijmegen, the Netherlands
| | - Evanguedes Kalapothakis
- Departamento de Genética, Ecologia e Evolução, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Carlos Chávez-Olórtegui
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Adolfo Borges
- Instituto de Medicina Experimental, Universidad Central de Venezuela, Caracas, Venezuela; Centro para el Desarrollo de la Investigación Científica, CEDIC, Asunción 1255, Paraguay.
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Li S, Kim C, Zong S, Liu Y, Kang J, Pak C, Cao Z, Wu Y. Dynamic synthesis and transport of fluorescent substances from moulting scorpions. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 234:112511. [PMID: 35816856 DOI: 10.1016/j.jphotobiol.2022.112511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 06/27/2022] [Accepted: 07/02/2022] [Indexed: 06/15/2023]
Abstract
Scorpion fluorescence under ultraviolet light is a well-known phenomenon, and its change is also a known biological feature during the scorpion moulting process. However, the synthesis and transport of fluorescent substances during the moulting stage remain unclear. In this study, in-depth investigations on the global fluorescence changes from the exoskeleton, fluorescence layer, coelomic fluid, and abdomen to the digestive glands indicated that the digestive glands, which occupy most of the space in the abdomen of the scorpion mesosoma segment, were responsible for synthesizing the fluorescent substances. More importantly, these fluorescent substances were produced in advance, before the moulting process, which contributed to the recovery of the fluorescent exoskeleton as early as possible. The synthesized fluorescent substances first entered the coelomic fluid, then successively passed through the inherent epithelial cell layer and two new formed endocuticle and exocuticle layers, and ultimately reached and became enriched in the new formed fluorescent layer, which was protected by the new epicuticle layer. These four new layers were the first to illustrate the structural features of the fluorescent exoskeleton. Due to the very soft body and the inability of the newly moulted scorpion to resist attacks from the predator, this special synthesis and transport strategy of the fluorescent substances could guarantee the rapid formation of the integrated fluorescent exoskeleton during the 24 h after ecdysis, which would be a novel biological feature during the scorpion evolution.
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Affiliation(s)
- Songryong Li
- College of Life Sciences, Wuhan University, Wuhan 430072, China; Department of Biotechnology, Faculty of Life Science, Kim Hyong Jik University of Education, Pyongyang, Democratic People's Republic of Korea
| | - Cholman Kim
- Department of Biotechnology, Faculty of Life Science, Kim Hyong Jik University of Education, Pyongyang, Democratic People's Republic of Korea
| | - Shaozhi Zong
- College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Yuqing Liu
- College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Jongguk Kang
- College of Life Sciences, Wuhan University, Wuhan 430072, China; Faculty of Life Science, Kim Il Sung University, Pyongyang, Democratic People's Republic of Korea
| | - Cholmin Pak
- College of Life Sciences, Wuhan University, Wuhan 430072, China; Gastrointestinal Hospital, Korean Red Cross General Hospital, Pyongyang, Democratic People's Republic of Korea
| | - Zhijian Cao
- College of Life Sciences, Wuhan University, Wuhan 430072, China; Center for BioDrug Research, Wuhan University, Wuhan 430072, China
| | - Yingliang Wu
- College of Life Sciences, Wuhan University, Wuhan 430072, China; Center for BioDrug Research, Wuhan University, Wuhan 430072, China.
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Insights in the biocatalyzed hydrolysis, esterification and transesterification of waste cooking oil with a vegetable lipase. Catal Today 2020. [DOI: 10.1016/j.cattod.2020.09.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Achouri N, Tomàs-Gamisans M, Triki S, Valero F, Miled N, Fendri A, Smichi N. Dissecting the Interaction Deficiency of a Cartilaginous Fish Digestive Lipase with Pancreatic Colipase: Biochemical and Structural Insights. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3064290. [PMID: 32258111 PMCID: PMC7094207 DOI: 10.1155/2020/3064290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 01/23/2020] [Accepted: 01/29/2020] [Indexed: 11/17/2022]
Abstract
A full-length cDNA encoding digestive lipase (SmDL) was cloned from the pancreas of the smooth-hound (Mustelus mustelus). The obtained cDNA was 1350 bp long encoding 451 amino acids. The deduced amino acid sequence has high similarity with known pancreatic lipases. Catalytic triad and disulphide bond positions are also conserved. According to the established phylogeny, the SmDL was grouped with those of tuna and Sparidae lipases into one fish digestive lipase cluster. The recently purified enzyme shows no dependence for bile salts and colipase. For this, the residue-level interactions between lipase-colipase are yet to be clearly understood. The structural model of the SmDL was built, and several dissimilarities were noticed when analyzing the SmDL amino acids corresponding to those involved in HPL binding to colipase. Interestingly, the C-terminal domain of SmDL which holds the colipase shows a significant role for colipase interaction. This is apt to prevent the interaction between fish lipase and the pancreatic colipase which and can provide more explanation on the fact that the classical colipase is unable to activate the SmDL.
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Affiliation(s)
- Neila Achouri
- University of Sfax, ENIS, Laboratory of Biochemistry and Enzymatic Engineering of Lipases, Road of Soukra, BPW 1173-3038 Sfax, Tunisia
| | - Màrius Tomàs-Gamisans
- UAB, Universitat Autònoma de Barcelona, Departament d'Enginyeria Química, Biològica i Ambiental, Bellaterra Barcelona, Spain
| | - Soumaya Triki
- University of Sfax, Center of Biotechnology of Sfax, Laboratory of Molecular and Cellular Screening Processes, BP 111 7 Road Sidi Mansour km 6, Sfax, Tunisia
| | - Francisco Valero
- UAB, Universitat Autònoma de Barcelona, Departament d'Enginyeria Química, Biològica i Ambiental, Bellaterra Barcelona, Spain
| | - Nabil Miled
- University of Jeddah, College of Science, Department of Biological Sciences, Jeddah, Saudi Arabia
- Functional Genomics and Plant Physiology Unit, Higher Institute of Biotechnology of Sfax, 3038 Sfax, Tunisia
| | - Ahmed Fendri
- University of Sfax, ENIS, Laboratory of Biochemistry and Enzymatic Engineering of Lipases, Road of Soukra, BPW 1173-3038 Sfax, Tunisia
| | - Nabil Smichi
- University of Sfax, ENIS, Laboratory of Biochemistry and Enzymatic Engineering of Lipases, Road of Soukra, BPW 1173-3038 Sfax, Tunisia
- Mayo Clinic Arizona, 13400 Shea Boulevard, Scottsdale, AZ 85259, USA
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Indoxyl Acetate as a Substrate for Analysis of Lipase Activity. Int J Anal Chem 2019; 2019:8538340. [PMID: 31885593 PMCID: PMC6914949 DOI: 10.1155/2019/8538340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 10/10/2019] [Accepted: 11/11/2019] [Indexed: 01/01/2023] Open
Abstract
Lipases play a crucial role in metabolism of microbes, fungi, plants, and animals, and in analytical chemistry, they are often used in detection of fats and triglycerides. Determination of lipase activity is also important in toxicology, when lipase activity can be both increased and decreased by organophosphates and other pesticides and in medicine for diagnosis of heart diseases. The standard method for lipase activity determination is based on cleaving ester bonds in lipase buffer containing Tween. Our aim was to find a method with faster and more sensitive response. It is known that acetylcholinesterase belongs to the same group of hydrolases enzymes as lipases and it cleaves indoxyl acetate, so we assume indoxyl acetate could report a similar reaction with lipase. Our method is based on indoxyl acetate as a substrate for lipase, where indoxyl acetate is cleaved by lipase to indoxyl and acetate moiety and blue indigo is created. The method was optimized for different times and amount of enzyme and compared with the standard Tween assay. The calibration curve measured in reaction time 20 minutes with 10 μl of lipase exhibited the best analytical parameters, and it showed Michaelis-Menten response with the Michaelis-Menten constant equal to 8.72 mmol/l. The indoxyl acetate-based method showed faster and more sensitive response than the standard method for lipase activity determination, so it has great potential in biosensor construction and it could be used in industry, medicine, toxicology, and common practice where the activity of lipases is need to be measured.
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Navvabi A, Razzaghi M, Fernandes P, Karami L, Homaei A. Novel lipases discovery specifically from marine organisms for industrial production and practical applications. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.04.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Smichi N, Fendri A, Triki S, Arondel V, Rebai A, Gargouri Y, Miled N. Biochemical characterization, cloning and molecular modeling of a digestive lipase from red seabream ( Pagrus major): Structural explanation of the interaction deficiency with colipase and lipidic interface. Eng Life Sci 2017; 17:664-677. [PMID: 32624812 DOI: 10.1002/elsc.201600246] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 11/30/2016] [Accepted: 01/05/2017] [Indexed: 11/12/2022] Open
Abstract
Red seabream digestive lipase (RsDL) was purified from fresh pyloric caeca. Pure RsDL has an apparent molecular mass of 50 kDa. The RsDL is more active on short-chain triacylglycerols (TC4), and enzymatic activity decreases when medium (TC8) or long-chain (olive oil) triacylglycerols were used as substrates. The specific activities of RsDL are very weak as compared to those obtained with classical pancreatic lipases. No colipase was detected in the red seabream pyloric caeca. Furthermore, the RsDL was not activated by a mammal colipase. Similar results were reported for annular seabream lipase. In order to explain structurally the discrepancies between sparidae and mammal lipases, genes encoding mature RsDL and five other lipases from sparidae fish species were cloned and sequenced. Phylogenetic studies indicated the closest homology of sparidae lipases to bird pancreatic ones. Structural models were built for annular seabream and RsDL under their closed and open forms using mammal pancreatic lipases as templates. Several differences were noticed when analyzing the amino acids corresponding to those involved in HPL binding to colipase. This is likely to prevent interaction between the fish lipase and the mammalian colipase and may explain the fact that mammalian colipase is not effective in activating sparidae lipases. In addition, several hydrophobic residues, playing a key role in anchoring pancreatic lipase onto the lipid interface, are replaced by polar residues in fish lipases. This might explain the reason why the latter enzymes display weak activity levels when compared to mammalian pancreatic lipases.
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Affiliation(s)
- Nabil Smichi
- Laboratory of Biochemistry and Enzymatic Engineering of Lipases ENIS Sfax Tunisia
| | - Ahmed Fendri
- Laboratory of Biochemistry and Enzymatic Engineering of Lipases ENIS Sfax Tunisia
| | - Soumaya Triki
- Department of Bioinformatics and Human Genetics Center of Biotechnology of Sfax Sfax Tunisia
| | - Vincent Arondel
- Laboratory of Membrane Biogenesis, CNRS, UMR5200 Bordeaux University BP81, 71 Edouard Bourlaux Villenave d'Ornon France
| | - Ahmed Rebai
- Department of Bioinformatics and Human Genetics Center of Biotechnology of Sfax Sfax Tunisia
| | - Youssef Gargouri
- Laboratory of Biochemistry and Enzymatic Engineering of Lipases ENIS Sfax Tunisia
| | - Nabil Miled
- Laboratory of Biochemistry and Enzymatic Engineering of Lipases ENIS Sfax Tunisia
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Laino A, Mattoni C, Ojanguren-Affilastro A, Cunningham M, Fernando Garcia C. Analysis of lipid and fatty acid composition of three species of scorpions with relation to different organs. Comp Biochem Physiol B Biochem Mol Biol 2015; 190:27-36. [DOI: 10.1016/j.cbpb.2015.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/14/2015] [Accepted: 08/14/2015] [Indexed: 11/30/2022]
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Rivera-Perez C. Marine invertebrate lipases: Comparative and functional genomic analysis. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2015; 15:39-48. [PMID: 26114431 DOI: 10.1016/j.cbd.2015.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 05/20/2015] [Accepted: 06/05/2015] [Indexed: 10/23/2022]
Abstract
Lipases are key enzymes involved in lipid digestion, storage and mobilization of reserves during fasting or heightened metabolic demand. This is a highly conserved process, essential for survival. The genomes of five marine invertebrate species with distinctive digestive system were screened for the six major lipase families. The two most common families in marine invertebrates, the neutral an acid lipases, are also the main families in mammals and insects. The number of lipases varies two-fold across analyzed genomes. A high degree of orthology with mammalian lipases was observed. Interestingly, 19% of the marine invertebrate lipases have lost motifs required for catalysis. Analysis of the lid and loop regions of the neutral lipases suggests that many marine invertebrates have a functional triacylglycerol hydrolytic activity as well as some acid lipases. A revision of the expression profiles and functional activity on sequences in databases and scientific literature provided information regarding the function of these families of enzymes in marine invertebrates.
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Affiliation(s)
- Crisalejandra Rivera-Perez
- Department of Biological Sciences, Florida International University, Miami, FL 33199, USA; Centro de Investigaciones Biologicas del Noroeste (CIBNOR), La Paz, B.C.S. 23096, Mexico.
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Fuzita FJ, Pinkse MWH, Patane JSL, Juliano MA, Verhaert PDEM, Lopes AR. Biochemical, transcriptomic and proteomic analyses of digestion in the scorpion Tityus serrulatus: insights into function and evolution of digestion in an ancient arthropod. PLoS One 2015; 10:e0123841. [PMID: 25875018 PMCID: PMC4398375 DOI: 10.1371/journal.pone.0123841] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 02/25/2015] [Indexed: 01/29/2023] Open
Abstract
Scorpions are among the oldest terrestrial arthropods and they have passed through small morphological changes during their evolutionary history on land. They are efficient predators capable of capturing and consuming large preys and due to envenomation these animals can become a human health challenge. Understanding the physiology of scorpions can not only lead to evolutionary insights but also is a crucial step in the development of control strategies. However, the digestive process in scorpions has been scarcely studied. In this work, we describe the combinatory use of next generation sequencing, proteomic analysis and biochemical assays in order to investigate the digestive process in the yellow scorpion Tityus serrulatus, mainly focusing in the initial protein digestion. The transcriptome generated database allowed the quantitative identification by mass spectrometry of different enzymes and proteins involved in digestion. All the results suggested that cysteine cathepsins play an important role in protein digestion. Two digestive cysteine cathepsins were isolated and characterized presenting acidic characteristics (pH optima and stability), zymogen conversion to the mature form after acidic activation and a cross-class inhibition by pepstatin. A more elucidative picture of the molecular mechanism of digestion in a scorpion was proposed based on our results from Tityus serrulatus. The midgut and midgut glands (MMG) are composed by secretory and digestive cells. In fasting animals, the secretory granules are ready for the next predation event, containing enzymes needed for alkaline extra-oral digestion which will compose the digestive fluid, such as trypsins, astacins and chitinase. The digestive vacuoles are filled with an acidic proteolytic cocktail to the intracellular digestion composed by cathepsins L, B, F, D and legumain. Other proteins as lipases, carbohydrases, ctenitoxins and a chitolectin with a perithrophin domain were also detected. Evolutionarily, a large gene duplication of cathepsin L occurred in Arachnida with the sequences from ticks being completely divergent from other arachnids probably due to the particular selective pressures over this group.
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Affiliation(s)
- Felipe J. Fuzita
- Laboratory of Biochemistry and Biophysics, Instituto Butantan, São Paulo, Brazil
- Biotechnology Program, University of São Paulo, São Paulo, Brazil
| | - Martijn W. H. Pinkse
- Laboratory of Analytical Biotechnology & Innovative Peptide Biology, Delft University of Technology, Delft, The Netherlands
| | - José S. L. Patane
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | | | - Peter D. E. M. Verhaert
- Laboratory of Analytical Biotechnology & Innovative Peptide Biology, Delft University of Technology, Delft, The Netherlands
| | - Adriana R. Lopes
- Laboratory of Biochemistry and Biophysics, Instituto Butantan, São Paulo, Brazil
- * E-mail:
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Linton SM, Saborowski R, Shirley AJ, Penny JA. Digestive enzymes of two brachyuran and two anomuran land crabs from Christmas Island, Indian Ocean. J Comp Physiol B 2014; 184:449-68. [PMID: 24566501 DOI: 10.1007/s00360-014-0815-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 01/28/2014] [Accepted: 02/06/2014] [Indexed: 10/25/2022]
Abstract
The digestive ability of four sympatric land crabs species (the gecarcinids, Gecarcoidea natalis and Discoplax celeste and the anomurans, Birgus latro and Coenobita perlatus) was examined by determining the activity of their digestive enzymes. The gecarcinids are detritivores that consume mainly leaf litter; the robber crab, B. latro, is an omnivore that preferentially consumes items high in lipid, carbohydrate and/or protein; C. perlatus is also an omnivore/detritivore. All species possess protease, lipase and amylase activity for hydrolysing ubiquitous protein, lipid and storage polysaccharides (glycogen and starch). Similarly all species possess enzymes such as N-acetyl-β-D-glucosaminidase, the cellulases, endo-β-1,4-glucanase and β-glucohydrolase and hemicellulases, lichenase and laminarinase for the respective hydrolysis of structural substrates chitin, cellulose and hemicelluloses, lichenan and laminarin. Except for the enzyme activities of C. perlatus, enzyme activity could not be correlated to dietary preference. Perhaps others factors such as olfactory and locomotor ability and metabolic status may determine the observed dietary preferences. The digestive fluid of C. perlatus possessed higher endo-β-1,4-glucanase, lichenase and laminarinase activities compared to that of the other species. Thus, C. perlatus may be efficient at digestion of cellulose and hemicellulose within plant material. Zymography indicated that the majority of protease, lipase, phosphatase, amylase, endo-β-1,4-glucanase, β-glucohydrolase and N-acetyl-β-D-glucosaminidase isozymes were common to all species, and hence were inherited from a common aquatic ancestor. Differences were observed for the phosphatase, lipase and endo-β-1,4-glucanase isozymes. These differences are discussed in relation to phylogeny and possible evolution to cope with the adoption of a terrestrial diet.
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Affiliation(s)
- Stuart M Linton
- School of Life and Environmental Sciences, Deakin University, Pigdons Road, Waurn Ponds, VIC, 3217, Australia,
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Zarai Z, Ali MB, Fendri A, Louati H, Mejdoub H, Gargouri Y. Purification and biochemical properties of Hexaplex trunculus digestive lipase. Process Biochem 2012. [DOI: 10.1016/j.procbio.2012.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Triacylglycerol catabolism in the prawn Macrobrachium borellii (Crustacea: Palaemoniade). Comp Biochem Physiol B Biochem Mol Biol 2011; 160:201-7. [PMID: 21889599 DOI: 10.1016/j.cbpb.2011.08.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 08/22/2011] [Accepted: 08/23/2011] [Indexed: 11/22/2022]
Abstract
While invertebrates store neutral lipids as their major energy source, little is known about triacylglycerol (TAG) class composition and their differential catabolism in aquatic arthropods. This study focuses on the composition of the main energy source and its catabolism by lipase from the midgut gland (hepatopancreas) of the crustacean Macrobrachium borellii. Silver-ion thin-layer chromatography of prawn large TAG deposit (80% of total lipids) and its subsequent fatty acid analysis by gas chromatography allowed the identification of 4 major fractions. These are composed of fatty acids of decreasing unsaturation and carbon chain length, the predominant being 18:1n-9. Fraction I, the most unsaturated one, contained mainly 20:5n-3; fraction II 18:2n-6; fraction III 18:1n-9 while the most saturated fraction contained mostly 16:0. Hepatopancreas main lipase (Mr 72 kDa) cross-reacted with polyclonal antibodies against insect lipase, was not dependent on the presence of Ca(2+) and had an optimum activity at 40°C and pH 8.0. Kinetic analysis showed a Michaelis-Menten behavior. A substrate competition assay evidenced lipase specificity following the order: 18:1n-9-TAG>PUFA-enriched-TAG>16:0-TAG different from that in vertebrates. These data indicate there is a reasonable correspondence between the fatty acid composition of TAG and the substrate specificity of lipase, which may be an important factor in determining which fatty acids are mobilized during lipolysis for oxidation in crustaceans.
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Louati H, Zouari N, Miled N, Gargouri Y. A new chymotrypsin-like serine protease involved in dietary protein digestion in a primitive animal, Scorpio maurus: purification and biochemical characterization. Lipids Health Dis 2011; 10:121. [PMID: 21777432 PMCID: PMC3161877 DOI: 10.1186/1476-511x-10-121] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Accepted: 07/21/2011] [Indexed: 11/26/2022] Open
Abstract
Background Most recent works on chymotrypsins have been focused on marine animals and insects. However, no study was reported in chelicerate. Results Scorpion chymotrypsin-like protease (SCP) was purified to homogeneity from delipidated hepatopancreases. The protease NH2-terminal sequence exhibited more than 60% monoacids identity with those of insect putative peptidases. The protease displayed no sequence homology with classical proteases. From this point of view, the protease recalls the case of the scorpion lipase which displayed no sequence homology with known lipases. The scorpion amylase purified and characterized by our time, has an amino-acids sequence similar to those of mammalian amylases. The enzyme was characterized with respect its biochemical properties: it was active on a chymotrypsin substrate and had an apparent molecular mass of 25 kDa, like the classically known chymotrypsins. The dependence of the SCP activity and stability on pH and temperature was similar to that of mammalian chymotrypsin proteases. However, the SCP displayed a lower specific activity and a boarder pH activity range (from 6 to 9). Conclusion lower animal have a less evaluated digestive organ: a hepatopancreas, whereas, higher ones possess individualized pancreas and liver. A new chymotrypsin-like protease was purified for the first time from the scorpion hepatopancreas. Its biochemical characterization showed new features as compared to classical chymotrypsin-higher-animals proteases.
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Affiliation(s)
- Hanen Louati
- Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS, Université de Sfax, route de Soukra 3038, BP 1173 Sfax-Tunisia
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Rivera-Pérez C, García-Carreño FL, Saborowski R. Purification and biochemical characterization of digestive lipase in whiteleg shrimp. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2011; 13:284-295. [PMID: 20464437 DOI: 10.1007/s10126-010-9298-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Accepted: 04/25/2010] [Indexed: 05/29/2023]
Abstract
Penaeus vannamei lipase was purified from midgut gland of whiteleg shrimp. Pure lipase (E.C. 3.1.1.3) was obtained after Superdex 200 gel filtration and Resource Q anionic exchange. The pure lipase, which is a glycosylated molecule, is a monomer having a molecular mass of about 44.8 kDa, as determined by SDS-PAGE analysis. The lipase hydrolyses short and long-chain triacylglycerols and naphthol derivates at comparable rates. A specific activity of 1787 U mg(-1) and 475 U mg(-1) was measured with triolein and tributyrin as substrates, respectively, at pH 8.0 and 30°C in the absence of colipase. The lipase showed a K (m, app) of 3.22 mM and k (cat, app)/K (m, app) of 0.303 × 10(3) mM(-1) s(-1) using triolein as substrate. Natural detergents, such as sodium deoxycholate, act as potent inhibitors of the lipase. This inhibition can be reversed by adding fresh oil emulsion. Result with tetrahydrolipstatin, an irreversible inhibitor, suggests that the lipase is a serine enzyme. Peptide sequences of the lipase were determined and compared with the full-length sequence of lipase which was obtained by the rapid amplification of cDNA ends method. The full cDNA of the pvl was 1,186 bp, with a deduced protein of 362 amino acids that includes a consensus sequence (GXSXG) of the lipase superfamily of α/β-hydrolase. The gene exhibits features of conserved catalytic residues and high homology with various mammalian and insect lipase genes. A potential lid sequence is suggested for pvl.
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Affiliation(s)
- Crisalejandra Rivera-Pérez
- Centro de Investigaciones Biologicas del Noroeste (CIBNOR), Apdo. Postal 128, La Paz, B.C.S. 23000, Mexico
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Rivera-Pérez C, del Toro MDLÁN, García-Carreño F. Purification and characterization of an intracellular lipase from pleopods of whiteleg shrimp (Litopenaeus vannamei). Comp Biochem Physiol B Biochem Mol Biol 2011; 158:99-105. [DOI: 10.1016/j.cbpb.2010.10.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Revised: 10/08/2010] [Accepted: 10/10/2010] [Indexed: 11/26/2022]
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Smichi N, Fendri A, Chaâbouni R, Rebah FB, Gargouri Y, Miled N. Purification and Biochemical Characterization of an Acid-Stable Lipase from the Pyloric Caeca of Sardine (Sardinella aurita). Appl Biochem Biotechnol 2010; 162:1483-96. [DOI: 10.1007/s12010-010-8920-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 01/17/2010] [Indexed: 10/19/2022]
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Louati H, Zouari N, Fendri A, Gargouri Y. Digestive amylase of a primitive animal, the scorpion: purification and biochemical characterization. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:853-60. [PMID: 20206585 DOI: 10.1016/j.jchromb.2010.01.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Revised: 12/22/2009] [Accepted: 01/30/2010] [Indexed: 11/19/2022]
Abstract
Scorpion, one of the most ancient invertebrates was chosen, as a model of a primitive animal, to purify and characterize an amylase located in the hepatopancreas. The scorpion digestive amylase (SDA) was purified. Pure SDA was obtained after heat treatment followed by ammonium sulfate fractionation and three steps of chromatography. The pure amylase is not glycosylated and has a molecular mass of 59,101 Da determined by MALDI-TOF MS analysis. The maximal amylase activity was measured at pH 7.0 and 50 degrees C, in the presence of Ca2+ and using potato starch as substrate. The enzyme was able to hydrolyze also, glycogen and amylose. The 23 NH2-terminal amino acid SDA residues were sequenced. The sequence obtained is similar to those of mammalian and avian pancreatic amylases. Nevertheless, polyclonal antibodies directed against SDA failed to recognize classical digestive amylases like the porcine pancreatic one.
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Affiliation(s)
- Hanen Louati
- Laboratoire de Biochimie et de Génie, Enzymatique des Lipases, ENIS route de Soukra, 1173 Sfax, Tunisia
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Tiss A, Lengsfeld H, Verger R. A comparative kinetic study on human pancreatic and Thermomyces lanuginosa lipases: Inhibitory effects of tetrahydrolipstatin in the presence of lipid substrates. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcatb.2009.08.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Amara S, Fendri A, Ben Salem N, Gargouri Y, Miled N. Snail Hepatopancreatic Lipase: A New Member of Invertebrates Lipases' Group. Appl Biochem Biotechnol 2009; 162:942-52. [DOI: 10.1007/s12010-009-8837-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Accepted: 10/25/2009] [Indexed: 11/29/2022]
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Cherif S, Gargouri Y. Thermoactivity and effects of organic solvents on digestive lipase from hepatopancreas of the green crab. Food Chem 2009. [DOI: 10.1016/j.foodchem.2009.02.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Inhibition of human pancreatic lipase by tetrahydrolipstatin: Further kinetic studies showing its reversibility. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.11.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
OBJECTIVES The aim of the present study was to purify and characterize classic pancreatic lipase from the reptile turtle (TuPL). METHODS The lipase was purified from the fresh pancreas extract followed by diethylamino ethyl-cellulose chromatography, Sephacryl S-200 gel filtration, and a Mono-Q Sepharose chromatography. RESULTS Turtle pancreatic lipase is a serine enzyme and it contains only 1 free cysteine. Its activity is maximum at pH 8.2 and 37 degrees C. A specific activity of 10.000 U/mg and 5.000 U/mg were measured titrimetrically on tributyrin and olive oil emulsion, respectively. Natural detergents act as potent inhibitors of TuPL, and colipase restores the activity. When the lipase is inhibited by synthetic detergent, simultaneous addition of colipase and bile salts is required to restore the TuPL activity. The critical surface pressure of TuPL (pi(c)) = 20.9 mN m(-1)) is similar to the one of human PL (pi(c) = 18 mN m(-1)). CONCLUSIONS The results presented in this article indicate that despite the primitive character of the turtle, no significant difference has been observed between TuPL and known mammalian PLs. However, partial proteolysis of TuPL with chymotrypsin shows the absence of the 14-kDa fragment identified as the C-terminal domain in the case of many classic PLs.
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Cherif S, Fendri A, Miled N, Trabelsi H, Mejdoub H, Gargouri Y. Crab digestive lipase acting at high temperature: Purification and biochemical characterization. Biochimie 2007; 89:1012-8. [PMID: 17395356 DOI: 10.1016/j.biochi.2007.02.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Accepted: 02/06/2007] [Indexed: 11/18/2022]
Abstract
In recent years, recovery and characterization of enzymes from fish and aquatic invertebrates have taken place and this had led to the emergence of some interesting new applications of these enzymes. However, much less is known about lipases from crustaceans. A lipolytic activity was located in the crab digestive glands (hepatopancreas), from which a crab digestive lipase (CDL) was purified. Pure CDL has a molecular mass of 65kDa as determined by SDS/PAGE analysis. Unlike known digestive lipases, CDL displayed its maximal activity on long and short-chain triacylglycerols at a temperature of 60 degrees C. A specific activity of 500U/mg or 130U/mg was obtained with TC(4) or olive oil as substrate, respectively. Only 10% of the maximal activity was detected at 37 degrees C. The enzyme retained 80% of its maximal activity when incubated during 10 min at 60 degrees C, and was completely inactivated at a temperature higher than 65 degrees C. Interestingly, neither colipase, nor bile salts were detected in the crab hepatopancreas. Which suggests that colipase evolved in invertebrates simultaneously with the appearance of an exocrine pancreas and a true liver which produce bile salts. No similarity between the 13 N-terminal amino acid residues of CDL was found with those of known other digestive lipases.
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Affiliation(s)
- Slim Cherif
- Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS, BPW 3038, Sfax, Tunisia
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Zouari N, Miled N, Rouis S, Gargouri Y. Scorpion digestive lipase: A member of a new invertebrate's lipase group presenting novel characteristics. Biochimie 2007; 89:403-9. [PMID: 17212975 DOI: 10.1016/j.biochi.2006.11.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2006] [Accepted: 11/30/2006] [Indexed: 10/23/2022]
Abstract
Unlike classical digestive lipases, the scorpion digestive lipase (SDL) has a strong basic character. The SDL activity's optimal pH, when using tributyrin or olive oil as substrate, was 9.0. Added to that, the estimated isoelectric point of the native SDL using the electrofocusing technique, was found to be higher than 9.6. To our knowledge, this is the first report of an animal digestive lipase having such a basic character. When olive oil was used as substrate, SDL was shown to be insensitive to the presence of amphiphilic proteins such as bovine serum albumin (BSA). Furthermore, the hydrolysis was found to be specifically dependent on the presence of Ca(2+) ions, since no significant SDL activity was detected in the presence of ions chelator such as EDTA. Nevertheless, the SDL does not require Ca(2+) to trigger the hydrolysis of tributyrin emulsion. Interestingly Zn(2+) and Cu(2+) ions act as strong inhibitors of SDL activity when using tributyrin as substrate. An internal chymotryptic cleavage of SDL generated two fragments of 28 and 25 kDa having the same N-terminal sequence. This sequence of 19 residues does not share any homology with known animal and microbial lipases. Polyclonal antibodies directed against SDL (pAbs anti-SDL) failed to recognise ostrich pancreatic and dog gastric lipases (OPL and rDGL). Moreover, both pAbs anti-OPL and anti-rDGL failed to immunoreact with SDL. These immunological as well as distinct biochemical properties strengthen the idea that SDL appears to belong to a new invertebrate's lipase group.
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Affiliation(s)
- Nacim Zouari
- Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS, BPW, 3038 Sfax, Tunisia
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Aryee AN, Simpson BK, Villalonga R. Lipase fraction from the viscera of grey mullet (Mugil cephalus). Enzyme Microb Technol 2007. [DOI: 10.1016/j.enzmictec.2006.07.009] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Asler IL, Zehl M, Kovacić F, Müller R, Abramić M, Allmaier G, Kojić-Prodić B. Mass spectrometric evidence of covalently-bound tetrahydrolipstatin at the catalytic serine of Streptomyces rimosus lipase. Biochim Biophys Acta Gen Subj 2007; 1770:163-70. [PMID: 17137716 DOI: 10.1016/j.bbagen.2006.10.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2006] [Revised: 10/18/2006] [Accepted: 10/18/2006] [Indexed: 11/20/2022]
Abstract
We have recently detected that the lipase from Streptomyces rimosus belongs to a large but poorly characterised family of SGNH hydrolases having the alpha beta alpha-fold. Our biochemical characterisation relates to the specific inhibition of an extracellular lipase from Streptomyces rimosus (SRL, 24.2 kDa, Q93MW7) by the preincubation method with tetrahydrolipstatin (THL). In high molar excess (THL/SRL=590 at 25 degrees C, pH=7.0) and after 2 h of incubation in an aqueous system, 56% of the enzyme inhibition was reached. Under the same conditions and in the presence of 50% (v/v) 2-propanol/water, 71% enzyme inhibition was obtained. Kinetic measurements are in agreement with pseudo-first-order kinetics. The nucleophilic attack of the catalytic serine residue 10 of SRL occurs via an opening of the beta-lactone ring of tetrahydrolipstatin and formation of a covalent ester bond. The intact covalent complex of SRL-inhibitor was analysed by ESI and vacuum MALDI mass spectrometry and, furthermore, the exact covalent THL linkage was determined by vacuum MALDI high-energy collision-induced dissociation tandem mass spectrometry.
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Zouari N, Bernadac A, Miled N, Rebai T, De Caro A, Rouis S, Carriere F, Gargouri Y. Immunocytochemical localization of scorpion digestive lipase. Biochim Biophys Acta Gen Subj 2006; 1760:1386-92. [PMID: 16806715 DOI: 10.1016/j.bbagen.2006.02.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2005] [Revised: 02/09/2006] [Accepted: 02/09/2006] [Indexed: 11/15/2022]
Abstract
The scorpion hepatopancreas consists of digestive diverticula and interstitial tissue. A digestive diverticulum is composed of two differentiated cell types: the secretory zymogene-like cells and the digestive cells which are the most abundant. The scorpion digestive lipase (SDL) has been previously purified from scorpion hepatopancreas, but its cellular localization has not yet been established. Polyclonal antibodies specific to SDL were prepared and used in immunofluorescence and immunogold techniques to determine the cellular location of SDL. Our results clearly established that SDL was detected intracellularly in specific vesicles tentatively named (SDL+) granules of the digestive cells. No immunolabelling was observed in secretory zymogene-like cells. This immunocytolocalization indicates that lipid digestion might occur in specific granules inside the digestive cells, as suggested by previous studies on the scorpion digestive process.
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Affiliation(s)
- Nacim Zouari
- Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS, BPW route de Soukra, 3038 Sfax, Tunisia
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Zouari N, Sayari A, Miled N, Verger R, Gargouri Y. Scorpion digestive lipase: kinetic study using monomolecular film technique. Colloids Surf B Biointerfaces 2006; 49:8-14. [PMID: 16580184 DOI: 10.1016/j.colsurfb.2006.02.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2006] [Revised: 02/21/2006] [Accepted: 02/21/2006] [Indexed: 11/17/2022]
Abstract
Using the classical emulsified system and the monomolecular film technique, we compared the interfacial properties of the scorpion digestive lipase (SDL) with those of higher animals'. In the absence of bile slats, SDL does not hydrolyse efficiently pure tributyrin, as well as dicaprin films maintained at low surface pressure. The preincubation of bile salts with tributyrin seems to be a better substrate for SDL than the pure tributyrin. A kinetic study on the surface pressure dependency, stereospecificity and regioselectivity of SDL was performed using monomolecular films of either three dicaprin isomers or three pairs of didecanoyl-deoxyamino-O-methyl glycerol enantiomers (DDG) containing a single hydrolysable decanoyl ester bond. With all diacylglycerol isomers, SDL has a surface pressure threshold of about 15 m Nm(-1), below which enzymatic activity is undetectable. SDL seems to prefer vicinal ester groups of the diacylglycerol isomers, with preference for sn-1 position at both 15 and 23 m Nm(-1). Furthermore, the maximum SDL activity is measured with DDG having a primary ester bond (1,3DDG, SII). This shows that SDL has a preference for the sn-1 position of this diacylglycerol analogue. Moreover, this was in line with the fact that SDL is inactive on sn-2 position of both DDG isomers and a triacylglycerol. With diacylglycerol analogue isomers, SDL shows a preference for distal isomers contrary to what has been observed with diacylglycerol isomers. SDL interacts with egg-phosphatidyl choline (egg-PC) monomolecular films. The critical surface pressure value (13 m Nm(-1)) is comparable to those of pancreatic lipases.
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Affiliation(s)
- Nacim Zouari
- Laboratoire de Biochimie et de Genie Enzymatique des Lipases, ENIS, BPW 3038 Sfax, Tunisia
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