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Huang Z, Ni G, Dai L, Zhang W, Feng S, Wang F. Biochemical Characterization of Novel GH6 Endoglucanase from Myxococcus sp. B6-1 and Its Effects on Agricultural Straws Saccharification. Foods 2023; 12:2517. [PMID: 37444255 DOI: 10.3390/foods12132517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/21/2023] [Accepted: 06/25/2023] [Indexed: 07/15/2023] Open
Abstract
Cellulase has been widely used in many industrial fields, such as feed and food industry, because it can hydrolyze cellulose to oligosaccharides with a lower degree of polymerization. Endo-β-1,4-glucanase is a critical speed-limiting cellulase in the saccharification process. In this study, endo-β-1,4-glucanase gene (CelA257) from Myxococcus sp. B6-1 was cloned and expressed in Escherichia coli. CelA257 contained carbohydrate-binding module (CBM) 4-9 and glycosyl hydrolase (GH) family 6 domain that shares 54.7% identity with endoglucanase from Streptomyces halstedii. The recombinant enzyme exhibited optimal activity at pH 6.5 and 50 °C and was stable over a broad pH (6-9.5) range and temperature < 50 °C. CelA257 exhibited broad substrate specificity to barley β-glucan, lichenin, CMC, chitosan, laminarin, avicel, and phosphoric acid swollen cellulose (PASC). CelA257 degraded both cellotetrose (G4) and cellppentaose (G5) to cellobiose (G2) and cellotriose (G3). Adding CelA257 increased the release of reducing sugars in crop straw powers, including wheat straw (0.18 mg/mL), rape straw (0.42 mg/mL), rice straw (0.16 mg/mL), peanut straw (0.16 mg/mL), and corn straw (0.61 mg/mL). This study provides a potential additive in biomass saccharification applications.
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Affiliation(s)
- Zhen Huang
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Guorong Ni
- College of Land Resources and Environment, Jiangxi Agriculture University, Nanchang 330045, China
| | - Longhua Dai
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Weiqi Zhang
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Siting Feng
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China
| | - Fei Wang
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China
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Escobar-Correas S, Mendoza-Porras O, Castro-Vazquez A, Vega IA, Colgrave ML. Proteomic analysis of digestive tract peptidases and lipases from the invasive gastropod Pomacea canaliculata. PEST MANAGEMENT SCIENCE 2023; 79:1420-1430. [PMID: 36464640 DOI: 10.1002/ps.7311] [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: 04/04/2022] [Revised: 11/22/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND The invasive gastropod Pomacea canaliculata has received great attention in the last decades as a result of its negative impact on crops agriculture, yet knowledge of their digestive physiology remains incomplete, particularly the enzymatic breakdown of macromolecules such as proteins and lipids. RESULTS Discovery proteomics revealed aspartic peptidases, cysteine peptidases, serine peptidases, metallopeptidases and threonine peptidases, as well as acid and neutral lipases and phospholipases along the digestive tract of P. canaliculata. Peptides specific to peptidases (139) and lipases (14) were quantified by targeted mass spectrometry. Digestion begins in the mouth via diverse salivary peptidases (nine serine peptidases; seven cysteine peptidases, one aspartic peptidase and 22 metallopeptidases) and then continues in the oesophagus (crop) via three luminal metallopeptidases (Family M12) and six serine peptidases (Family S1). Downstream, the digestive gland provides a battery of enzymes composed of aspartic peptidase (one), cysteine peptidases (nine), serine peptidases (12) and metallopeptidases (24), including aminopeptidases, carboxypeptidases and dipeptidases). The coiled gut has M1 metallopeptidases that complete the digestion of small peptides. Lipid extracellular digestion is completed by triglyceride lipases. CONCLUSION From an integrative physiological and anatomical perspective, P. canaliculata shows an unexpected abundance and diversity of peptidases, which participate mainly in extracellular digestion. Moreover, the previously unknown occurrence of luminal lipases from the digestive gland is reported for the first time. Salivary and digestive glands were the main tissues involved in the synthesis and secretion of these enzymes, but plausibly the few luminally exclusive peptidases are secreted by ventrolateral pouches or epithelial unicellular glands. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Sophia Escobar-Correas
- IHEM, CONICET, Universidad Nacional de Cuyo, Mendoza, Argentina
- Universidad Nacional de Cuyo, Facultad de Ciencias Médicas, Instituto de Fisiología, Mendoza, Argentina
- CSIRO, Agriculture & Food, St. Lucia, Queensland, Australia
| | | | - Alfredo Castro-Vazquez
- IHEM, CONICET, Universidad Nacional de Cuyo, Mendoza, Argentina
- Universidad Nacional de Cuyo, Facultad de Ciencias Médicas, Instituto de Fisiología, Mendoza, Argentina
- Facultad de Ciencias Exactas y Naturales, Departamento de Biología, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Israel A Vega
- IHEM, CONICET, Universidad Nacional de Cuyo, Mendoza, Argentina
- Universidad Nacional de Cuyo, Facultad de Ciencias Médicas, Instituto de Fisiología, Mendoza, Argentina
- Facultad de Ciencias Exactas y Naturales, Departamento de Biología, Universidad Nacional de Cuyo, Mendoza, Argentina
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An overview on marine cellulolytic enzymes and their potential applications. Appl Microbiol Biotechnol 2020; 104:6873-6892. [DOI: 10.1007/s00253-020-10692-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/10/2020] [Accepted: 05/17/2020] [Indexed: 11/26/2022]
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Kim S, Jeon D, Lee JY, Cho SJ, Lim Y, Eyun SI, Park SC, Seo YJ. Upregulation of cellulase activity and mRNA levels by bacterial challenge in the earthworm Eisenia andrei, supporting the involvement of cellulases in innate immunity. Biochem Biophys Res Commun 2019; 521:15-18. [PMID: 31640857 DOI: 10.1016/j.bbrc.2019.09.134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 09/28/2019] [Indexed: 10/25/2022]
Abstract
To investigate whether earthworm cellulases contribute to the innate immune system, the responsiveness of cellulase activity and mRNA expression to bacterial challenge was examined by zymography and RNA sequencing. A zymographic analysis revealed that the activity levels of earthworm cellulases were upregulated in response to either a bacterial (Bacillus subtilis or Escherichia coli) or LPS challenge. After the challenge, significant increases in cellulase 1 and cellulase 2 activity levels were observed within 8-16 and 16-24 h, respectively. In the coelomic fluid, both activities were significantly upregulated at 8 h post-injection with B. subtilis. Based on RNA sequencing, cellulase-related mRNAs encoding beta-1,4-endoglucanases were upregulated by 3-fold within 6 h after B. subtilis injection. Our results clearly demonstrated that earthworm cellulases are upregulated by bacterial challenge at the mRNA and protein levels. These results support the view that earthworm cellulases act as inducible humoral effectors of innate immunity against bacterial infection.
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Affiliation(s)
- Seyoung Kim
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Donggu Jeon
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Ju-Young Lee
- Department of Biomedical Engineering, College of Medical Convergence, Catholic Kwandong University, Gangneung, Republic of Korea
| | - Sung-Jin Cho
- School of Biological Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - Younghyun Lim
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Seong-Il Eyun
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Soon Cheol Park
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea.
| | - Young-Jin Seo
- Department of Life Science, Chung-Ang University, Seoul, Republic of Korea.
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Escobar-Correas S, Mendoza-Porras O, Dellagnola FA, Colgrave ML, Vega IA. Integrative Proteomic Analysis of Digestive Tract Glycosidases from the Invasive Golden Apple Snail, Pomacea canaliculata. J Proteome Res 2019; 18:3342-3352. [PMID: 31321981 DOI: 10.1021/acs.jproteome.9b00282] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The freshwater snail Pomacea canaliculata, an invasive species of global significance, possesses a well-developed digestive system and diverse feeding mechanisms enabling the intake of a wide variety of food. The identification of glycosidases in adult snails would increase the understanding of their digestive physiology and potentially generate new opportunities to eradicate and/or control this invasive species. In this study, liquid chromatography coupled to tandem mass spectrometry was applied to define the occurrence, diversity, and origin of glycoside hydrolases along the digestive tract of P. canaliculata. A range of cellulases, hemicellulases, amylases, maltases, fucosidases, and galactosidases were identified across the digestive tract. The digestive gland and the contents of the crop and style sac yield a higher diversity of glycosidase-derived peptides. Subsequently, peptides derived from 81 glycosidases (46 proteins from the public database and 35 uniquely from the transcriptome database) that were distributed among 13 glycoside hydrolase families were selected and quantified using multiple reaction monitoring mass spectrometry. This study showed a high glycosidase abundance and diversity in the gut contents of P. canaliculata which participate in extracellular digestion of complex dietary carbohydrates. Salivary and digestive glands were the main tissues involved in their synthesis and secretion.
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Affiliation(s)
- Sophia Escobar-Correas
- IHEM, CONICET , Universidad Nacional de Cuyo , Mendoza , Argentina.,Universidad Nacional de Cuyo, Facultad de Ciencias Médicas , Instituto de Fisiología , Mendoza 5500 , Argentina
| | - Omar Mendoza-Porras
- Agriculture & Food , CSIRO , 306 Carmody Road , St. Lucia , Queensland 4067 , Australia
| | - Federico A Dellagnola
- IHEM, CONICET , Universidad Nacional de Cuyo , Mendoza , Argentina.,Universidad Nacional de Cuyo, Facultad de Ciencias Médicas , Instituto de Fisiología , Mendoza 5500 , Argentina.,Universidad Nacional de Cuyo , Facultad de Ciencias Exactas y Naturales, Departamento de Biología , Mendoza 5500 , Argentina
| | - Michelle L Colgrave
- Agriculture & Food , CSIRO , 306 Carmody Road , St. Lucia , Queensland 4067 , Australia
| | - Israel A Vega
- IHEM, CONICET , Universidad Nacional de Cuyo , Mendoza , Argentina.,Universidad Nacional de Cuyo, Facultad de Ciencias Médicas , Instituto de Fisiología , Mendoza 5500 , Argentina.,Universidad Nacional de Cuyo , Facultad de Ciencias Exactas y Naturales, Departamento de Biología , Mendoza 5500 , Argentina
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Ueda M, Konemori Y, Nakazawa M, Sakamoto T, Sakaguchi M. Heterologous expression and characterization of a cold-adapted endo-1,4−β−glucanase gene from Bellamya chinensis laeta. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.07.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Lima TA, Dornelles LP, Oliveira APS, Guedes CC, Souza SO, Sá RA, Zingali RB, Napoleão TH, Paiva PM. Binding targets of termiticidal lectins from the bark and leaf of Myracrodruon urundeuva in the gut of Nasutitermes corniger workers. PEST MANAGEMENT SCIENCE 2018; 74:1593-1599. [PMID: 29297969 DOI: 10.1002/ps.4847] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/05/2017] [Accepted: 12/27/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Lectins, carbohydrate-binding proteins, from the bark (MuBL) and leaf (MuLL) of Myracrodruon urundeuva are termiticidal agents against Nasutitermes corniger workers and have been shown to induce oxidative stress and cell death in the midgut of these insects. In this study, we investigated the binding targets of MuBL and MuLL in the gut of N. corniger workers by determining the effects of these lectins on the activity of digestive enzymes. In addition, we used mass spectrometry to identify peptides from gut proteins that adsorbed to MuBL-Sepharose and MuLL-Sepharose columns. RESULTS Exoglucanase activity was neutralized in the presence of MuBL and stimulated by MuLL. α-l-Arabinofuranosidase activity was not affected by MuBL but was inhibited by MuLL. Both lectins stimulated α-amylase activity and inhibited protease and trypsin-like activities. Peptides with homology to apolipophorin, trypsin-like enzyme, and ABC transporter substrate-binding protein were detected from proteins that adsorbed to MuBL-Sepharose, while peptides from proteins that bound to MuLL-Sepharose shared homology with apolipophorin. CONCLUSION This study revealed that digestive enzymes and transport proteins found in worker guts can be recognized by MuBL and MuLL. Thus, the mechanism of their termiticidal activity may involve changes in the digestion and absorption of nutrients. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Thâmarah A Lima
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Leonardo P Dornelles
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Ana Patrícia S Oliveira
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Caio Cs Guedes
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Sueden O Souza
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Roberto A Sá
- Centro Acadêmico do Agreste, Universidade Federal de Pernambuco, Caruaru, Brazil
| | - Russolina B Zingali
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Thiago H Napoleão
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
| | - Patrícia Mg Paiva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Brazil
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Yang L, Cheng TY, Zhao FY. Comparative profiling of hepatopancreas transcriptomes in satiated and starving Pomacea canaliculata. BMC Genet 2017; 18:18. [PMID: 28228093 PMCID: PMC5322654 DOI: 10.1186/s12863-017-0485-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 02/11/2017] [Indexed: 12/13/2022] Open
Abstract
Background Although Pomacea canaliculata is native to South and Central America, it has become one of the most abundant invasive species worldwide and causes extensive damage to agriculture and horticulture. Conventional physical and chemical techniques have been used to eliminate P. canaliculata, but the effects are not ideal. Therefore, it is important to devise a new method based on a greater understanding of the biology of P. canaliculata. However, the molecular mechanisms underlying digestion and absorption in P. canaliculata are not well understood due to the lack of available genomic information for this species, particularly for digestive enzyme genes. Results In the present study, hepatopancreas transcriptome sequencing produced over 223 million high-quality reads, and a global de novo assembly generated a total of 87,766 unique transcripts (unigenes), of which 19,942 (22.7%) had significant similarities to proteins in the UniProt database. In addition, 296,675 annotated sequences were associated with Gene Ontology (GO) terms. A Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment was performed for the unique unigenes, and 262 pathways (p-value < 10−5) in P. canaliculata were found to be predominantly related to plant consumption and coarse fiber digestion and absorption. These transcripts were classified into four large categories: hydrolase, transferase, isomerase and cytochrome P450. The Reads Per Kilobase of transcript per Million mapped reads (RPKM) analysis showed that there were 523 down-regulated unigenes and 406 up-regulated unigenes in the starving apple snails compared with the satiated apple snails. Several important genes are associated with digestion and absorption in plants: endo-beta-1, 4-glucanase, xylanase, cellulase, cellulase EGX1, cellulase EGX3 and G-type lysozyme genes were identified. The qRT-PCR results confirmed that the expression patterns of these genes (except for the longipain gene) were consistent with the RNA-Seq results. Conclusions Our results provide a more comprehensive understanding of the molecular genes associated with hepatopancreas functioning. Differentially expressed genes corresponding to critical metabolic pathways were detected in the transcriptome of starving apple snails compared with satiated apple snails. In addition to the cellulase gene, other genes were identified that may be important factors in plant matter metabolism in P. canaliculata, and this information has the potential to expedite the study of digestive physiology in apple snails. Electronic supplementary material The online version of this article (doi:10.1186/s12863-017-0485-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lei Yang
- Laboratory of Molecular Physiology, College of Veterinary Medicine, Hunan Agricultural University, Changsha, Hunan Province, 410128, People's Republic of China.
| | - Tian-Yin Cheng
- Laboratory of Molecular Pathology, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, People's Republic of China
| | - Fei-Yan Zhao
- Laboratory of Molecular Physiology, College of Veterinary Medicine, Hunan Agricultural University, Changsha, Hunan Province, 410128, People's Republic of China
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Purification, Characterization, and Gene Cloning of a Cold-Adapted Endo-1,4-β-glucanase from Bellamya chinensis laeta. Mol Biotechnol 2016; 58:241-50. [PMID: 26921188 DOI: 10.1007/s12033-016-9922-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
An endo-1,4-β-glucanase from Bellamya chinensis laeta was purified to electrophoretically homogeneous state. The molecular weight of the purified enzyme was estimated 70,000 by SDS-PAGE. The enzyme was most active at pH 5.5 and 50 °C, and stable at around pH 10 and 50 °C. The enzyme exhibited the significant activity at 20 °C (30 % of the activity at optimal 50 °C). The enzyme was hydrolyzed cellohexaose into cellobiose, cellotriose, and cellotetraose as main products. Three cDNAs (BC-EG70a, BC-EG70b, and BC-EG70c) encoding the endo-1,4-β-glucanase were cloned by PCR-based method. Three endo-1,4-β-glucanases consisted of 1758 bp encoding 586 amino acids. The three genes were almost the same nucleotide sequences. The deduced proteins were consisted of a signal sequence, cellulose binding domain, linker, and catalytic domain. The amino acid sequence of BC-EG70a shares sequence identity degree with the endo-1,4-β-glucanases of Haliotis discus hannai (61 %), Ampullaria crossean (52 %), and Mizuhopecten yessoensis (51 %) which all belong to glycoside hydrolase family 9.
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Bai X, Yuan X, Wen A, Li J, Bai Y, Shao T. Efficient expression and characterization of a cold-active endo-1, 4-β-glucanase from Citrobacter farmeri by co-expression of Myxococcus xanthus protein S. ELECTRON J BIOTECHN 2016. [DOI: 10.1016/j.ejbt.2016.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Bui TH, Lee SY. Endogenous cellulase production in the leaf litter foraging mangrove crab Parasesarma erythodactyla. Comp Biochem Physiol B Biochem Mol Biol 2015; 179:27-36. [DOI: 10.1016/j.cbpb.2014.09.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 09/10/2014] [Accepted: 09/10/2014] [Indexed: 02/03/2023]
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Koch E, Lozada M, Dionisi H, Castro-Vazquez A. Uric acid-degrading bacteria in the gut of the invading apple snail Pomacea canaliculata and their possible symbiotic significance. Symbiosis 2014. [DOI: 10.1007/s13199-014-0296-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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13
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Lima TDA, Pontual EV, Dornelles LP, Amorim PK, Sá RA, Coelho LCBB, Napoleão TH, Paiva PMG. Digestive enzymes from workers and soldiers of termite Nasutitermes corniger. Comp Biochem Physiol B Biochem Mol Biol 2014; 176:1-8. [DOI: 10.1016/j.cbpb.2014.07.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 06/28/2014] [Accepted: 07/02/2014] [Indexed: 10/25/2022]
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Rahman MM, Inoue A, Ojima T. Characterization of a GHF45 cellulase, AkEG21, from the common sea hare Aplysia kurodai. Front Chem 2014; 2:60. [PMID: 25147784 PMCID: PMC4123733 DOI: 10.3389/fchem.2014.00060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 07/15/2014] [Indexed: 11/18/2022] Open
Abstract
The common sea hare Aplysia kurodai is known to be a good source for the enzymes degrading seaweed polysaccharides. Recently four cellulases, i.e., 95, 66, 45, and 21 kDa enzymes, were isolated from A. kurodai (Tsuji et al., 2013). The former three cellulases were regarded as glycosyl-hydrolase-family 9 (GHF9) enzymes, while the 21 kDa cellulase was suggested to be a GHF45 enzyme. The 21 kDa cellulase was significantly heat stable, and appeared to be advantageous in performing heterogeneous expression and protein-engineering study. In the present study, we determined some enzymatic properties of the 21 kDa cellulase and cloned its cDNA to provide the basis for the protein engineering study of this cellulase. The purified 21 kDa enzyme, termed AkEG21 in the present study, hydrolyzed carboxymethyl cellulose with an optimal pH and temperature at 4.5 and 40°C, respectively. AkEG21 was considerably heat-stable, i.e., it was not inactivated by the incubation at 55°C for 30 min. AkEG21 degraded phosphoric-acid-swollen cellulose producing cellotriose and cellobiose as major end products but hardly degraded oligosaccharides smaller than tetrasaccharide. This indicated that AkEG21 is an endolytic β-1,4-glucanase (EC 3.2.1.4). A cDNA of 1013 bp encoding AkEG21 was amplified by PCR and the amino-acid sequence of 197 residues was deduced. The sequence comprised the initiation Met, the putative signal peptide of 16 residues for secretion and the catalytic domain of 180 residues, which lined from the N-terminus in this order. The sequence of the catalytic domain showed 47–62% amino-acid identities to those of GHF45 cellulases reported in other mollusks. Both the catalytic residues and the N-glycosylation residues known in other GHF45 cellulases were conserved in AkEG21. Phylogenetic analysis for the amino-acid sequences suggested the close relation between AkEG21 and fungal GHF45 cellulases.
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Affiliation(s)
- Mohammad M Rahman
- Laboratory of Marine Biotechnology and Microbiology, Division of Applied Marine Life Science, Graduate School of Fisheries Sciences, Hokkaido University Hakodate, Japan ; Department of Fisheries Biology and Genetics, Bangladesh Agricultural University Mymensingh, Bangladesh
| | - Akira Inoue
- Laboratory of Marine Biotechnology and Microbiology, Division of Applied Marine Life Science, Graduate School of Fisheries Sciences, Hokkaido University Hakodate, Japan
| | - Takao Ojima
- Laboratory of Marine Biotechnology and Microbiology, Division of Applied Marine Life Science, Graduate School of Fisheries Sciences, Hokkaido University Hakodate, Japan
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Ueda M, Ito A, Nakazawa M, Miyatake K, Sakaguchi M, Inouye K. Cloning and expression of the cold-adapted endo-1,4-β-glucanase gene from Eisenia fetida. Carbohydr Polym 2014; 101:511-6. [DOI: 10.1016/j.carbpol.2013.09.057] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Revised: 09/05/2013] [Accepted: 09/16/2013] [Indexed: 10/26/2022]
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Tsuji A, Tominaga K, Nishiyama N, Yuasa K. Comprehensive enzymatic analysis of the cellulolytic system in digestive fluid of the Sea Hare Aplysia kurodai. Efficient glucose release from sea lettuce by synergistic action of 45 kDa endoglucanase and 210 kDa ß-glucosidase. PLoS One 2013; 8:e65418. [PMID: 23762366 PMCID: PMC3675134 DOI: 10.1371/journal.pone.0065418] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Accepted: 04/24/2013] [Indexed: 01/30/2023] Open
Abstract
Although many endo-ß-1,4-glucanases have been isolated in invertebrates, their cellulolytic systems are not fully understood. In particular, gastropod feeding on seaweed is considered an excellent model system for production of bioethanol and renewable bioenergy from third-generation feedstocks (microalgae and seaweeds). In this study, enzymes involved in the conversion of cellulose and other polysaccharides to glucose in digestive fluids of the sea hare (Aplysia kurodai) were screened and characterized to determine how the sea hare obtains glucose from sea lettuce (Ulva pertusa). Four endo-ß-1,4-glucanases (21K, 45K, 65K, and 95K cellulase) and 2 ß-glucosidases (110K and 210K) were purified to a homogeneous state, and the synergistic action of these enzymes during cellulose digestion was analyzed. All cellulases exhibited cellulase and lichenase activities and showed distinct cleavage specificities against cellooligosaccharides and filter paper. Filter paper was digested to cellobiose, cellotriose, and cellotetraose by 21K cellulase, whereas 45K and 65K enzymes hydrolyzed the filter paper to cellobiose and glucose. 210K ß-glucosidase showed unique substrate specificity against synthetic and natural substrates, and 4-methylumbelliferyl (4MU)-ß-glucoside, 4MU–ß-galactoside, cello-oligosaccharides, laminarin, and lichenan were suitable substrates. Furthermore, 210K ß-glucosidase possesses lactase activity. Although ß-glucosidase and cellulase are necessary for efficient hydrolysis of carboxymethylcellulose to glucose, laminarin is hydrolyzed to glucose only by 210K ß-glucosidase. Kinetic analysis of the inhibition of 210K ß-glucosidase by D-glucono-1,5-lactone suggested the presence of 2 active sites similar to those of mammalian lactase-phlorizin hydrolase. Saccharification of sea lettuce was considerably stimulated by the synergistic action of 45K cellulase and 210K ß-glucosidase. Our results indicate that 45K cellulase and 210K ß-glucosidase are the core components of the sea hare digestive system for efficient production of glucose from sea lettuce. These findings contribute important new insights into the development of biofuel processing biotechnologies from seaweed.
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Affiliation(s)
- Akihiko Tsuji
- Department of Biological Science and Technology, The University of Tokushima Graduate School, Tokushima, Japan.
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Purification and characterization of cellulase from North Pacific krill (Euphausia pacifica). Analysis of cleavage specificity of the enzyme. Comp Biochem Physiol B Biochem Mol Biol 2012; 163:324-33. [DOI: 10.1016/j.cbpb.2012.08.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 08/29/2012] [Accepted: 08/29/2012] [Indexed: 11/22/2022]
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18
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Jia X, Zou Z, Wang G, Wang S, Wang Y, Zhang Z. Gene expression profiling in respond to TBT exposure in small abalone Haliotis diversicolor. FISH & SHELLFISH IMMUNOLOGY 2011; 31:557-563. [PMID: 21767652 DOI: 10.1016/j.fsi.2011.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 06/18/2011] [Accepted: 07/02/2011] [Indexed: 05/31/2023]
Abstract
In this study, we investigated the gene expression profiling of small abalone, Haliotis diversicolor by tributyltin (TBT) exposure using a cDNA microarray containing 2473 unique transcripts. Totally, 107 up-regulated genes and 41 down-regulated genes were found. For further investigation of candidate genes from microarray data and EST analysis, quantitative real-time PCR was performed at 6 h, 24 h, 48 h, 96 h and 192 h TBT exposure. 26 genes were found to be significantly differentially expressed in different time course, 3 of them were unknown. Some gene homologues like cellulose, endo-beta-1,4-glucanase, ferritin subunit 1 and thiolester containing protein II CG7052-PB might be the good biomarker candidate for TBT monitor. The identification of stress response genes and their expression profiles will permit detailed investigation of the defense responses of small abalone genes.
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Affiliation(s)
- Xiwei Jia
- The Key Laboratory of Science and Technology for Aquaculture and Food Safety, Fisheries College, Jimei University, Xiamen, Fujian 361021, China
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Cheng CL, Chang JS. Hydrolysis of lignocellulosic feedstock by novel cellulases originating from Pseudomonas sp. CL3 for fermentative hydrogen production. BIORESOURCE TECHNOLOGY 2011; 102:8628-34. [PMID: 21481585 DOI: 10.1016/j.biortech.2011.03.053] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 03/16/2011] [Accepted: 03/17/2011] [Indexed: 05/12/2023]
Abstract
A newly isolated indigenous bacterium Pseudomonas sp. CL3 was able to produce novel cellulases consisting of endo-β-1,4-d-glucanase (80 and 100 kDa), exo-β-1,4-d-glucanase (55 kDa) and β-1,4-d-glucosidase (65 kDa) characterized by enzyme assay and zymography analysis. In addition, the CL3 strain also produced xylanase with a molecular weight of 20 kDa. The optimal temperature for enzyme activity was 50, 45, 45 and 55 °C for endo-β-1,4-d-glucanase, exo-β-1,4-d-glucanase, β-1,4-d-glucosidase and xylanase, respectively. All the enzymes displayed optimal activity at pH 6.0. The cellulases/xylanase could hydrolyze cellulosic materials very effectively and were thus used to hydrolyze natural agricultural waste (i.e., bagasse) for clean energy (H2) production by Clostridium pasteurianum CH4 using separate hydrolysis and fermentation process. The maximum hydrogen production rate and cumulative hydrogen production were 35 ml/L/h and 1420 ml/L, respectively, with a hydrogen yield of around 0.96 mol H2/mol glucose.
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Affiliation(s)
- Chieh-Lun Cheng
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan
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Farinas CS, Scarpelini LM, Miranda EA, Bertucci Neto V. Evaluation of operational parameters on the precipitation of endoglucanase and xylanase produced by solid state fermentation of Aspergillus niger. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2011. [DOI: 10.1590/s0104-66322011000100003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Teng Y, Yin Q, ding M, Zhao F. Purification and characterization of a novel endo-β-1,4-glucanases , AfEG22, from the giant snail, Achatina fulica frussac. Acta Biochim Biophys Sin (Shanghai) 2010; 42:729-34. [PMID: 20870931 DOI: 10.1093/abbs/gmq083] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, we confirmed that at least three endo-β-1,4-glucanases existed in the digestive juice of the giant snail, Achatina fulica ferussac, by Congo red staining assay. One of these enzymes, a novel endo-β-1,4-glucanase (AfEG22), was purified 29.5-fold by gel filtration, anion exchange, and hydrophobic interaction chromatography. The carboxymethyl cellulose (CMC) hydrolytic activity of the purified enzyme was 12.3 U/mg protein. The molecular mass of AfEG22 was 22081 Da determined by MALDI-TOF. N-terminal amino acid sequencing revealed a sequence of EQRCTNQGGILKYYNT, which did not have significant homology with any proteins in BLAST database. The optimal pH and temperature for hydrolytic activity toward CMC were pH 4.0 and 50°C, respectively. AfEG22 was stable between pH 3.0 and pH 12.0 when incubated at 4°C for 3 h or at 37°C for 1 h. The enzyme remained more than 80% activity between pH 4.5 and pH 7.0 after incubation at 50°C for 1 h. AfEG22 possessed excellent thermostability as more than 70% activity was remained after incubation at 60°C for 3 h. Substrate specific analysis revealed that AfEG22 was a typical endo-β-1,4-glucanase. This is the first time to report a novel endo-β-1,4-glucanase with high stability from the digestive juice of A. fulica.
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Affiliation(s)
- Yigang Teng
- Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, China
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Tang B, Pan H, Zhang Q, Ding L. Cloning and expression of cellulase gene EG1 from Rhizopus stolonifer var. reflexus TP-02 in Escherichia coli. BIORESOURCE TECHNOLOGY 2009; 100:6129-6132. [PMID: 19640700 DOI: 10.1016/j.biortech.2009.06.091] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 06/08/2009] [Accepted: 06/09/2009] [Indexed: 05/28/2023]
Abstract
A novel gene, EG encoding enzymes involved in carboxymethyl cellulose (CMC) degradation was isolated, sequenced from the filamentous fungus Rhizopus stolonifer var. reflexus TP-02, and expressed in Escherichia coli BL21. The results showed that the gene amplified from the cDNA of the strain could be classified as the family of endoglucanase. During the fermentation process, the maximum endoglucanase activity (i.e. 0.715 IU/ml) of the recombinant bacteria was obtained at 36 h. The SDS-PAGE analysis on purified samples showed that a band with apparent molecular weight of about 40 kDa was detected after staining with Coomassie brilliant blue.
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Affiliation(s)
- Bin Tang
- Department of Biochemical Engineering, Anhui University of Technology and Science, Wuhu 241000, China.
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