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Liang B, Song W, Xing R, Liu S, Yu H, Li P. The source, activity influencing factors and biological activities for future development of chitin deacetylase. Carbohydr Polym 2023; 321:121335. [PMID: 37739548 DOI: 10.1016/j.carbpol.2023.121335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/21/2023] [Accepted: 08/24/2023] [Indexed: 09/24/2023]
Abstract
Chitin deacetylase (CDA), a prominent member of the carbohydrate esterase enzyme family 4 (CE4), is found ubiquitously in bacteria, fungi, insects, and crustaceans. This metalloenzyme plays a pivotal role in recognizing and selectively removing acetyl groups from chitin, thus offering an environmentally friendly and biologically-driven preparation method for chitosan with immense industrial potential. Due to its diverse origins, CDAs sourced from different organisms exhibit unique functions, optimal pH ranges, and temperature preferences. Furthermore, certain organic reagents can induce structural changes in CDAs, influencing their catalytic activity. Leveraging CDA's capabilities extends beyond chitosan biocatalysis, as it demonstrates promising application value in agricultural pest control. In this paper, the source, reaction mechanism, influencing factors, the fermentation methods and applications of CDA are reviewed, which provides theoretical help for the research and application of CDA.
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Affiliation(s)
- Bicheng Liang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100000, China
| | - Wen Song
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100000, China
| | - Ronge Xing
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 7 Nanhai Road, Qingdao 266000, China.
| | - Song Liu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 7 Nanhai Road, Qingdao 266000, China
| | - Huahua Yu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 7 Nanhai Road, Qingdao 266000, China
| | - Pengcheng Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 7 Nanhai Road, Qingdao 266000, China
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Crystal structure of ChbG from Klebsiella pneumoniae reveals the molecular basis of diacetylchitobiose deacetylation. Commun Biol 2022; 5:862. [PMID: 36002585 PMCID: PMC9402603 DOI: 10.1038/s42003-022-03824-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 08/09/2022] [Indexed: 11/26/2022] Open
Abstract
The chitobiose (chb) operon is involved in the synthesis of chitooligosaccharide and is comprised of a BCARFG gene cluster. ChbG encodes a chitooligosaccharide deacetylase (CDA) which catalyzes the removal of one acetyl group from N,N’-diacetylchitobiose. It is considered a novel type of CDA due to its lack of sequence homology. Although there are various structural studies of CDAs linked to the kinetic properties of the enzyme, the structural information of ChbG is unavailable. In this study, the crystal structure of ChbG from Klebsiella pneumoniae is provided. The molecular basis of deacetylation of diacetylchitobiose by ChbG is determined based on structural analysis, mutagenesis, biophysical analysis, and in silico docking of the substrate, diacetylchitobiose. This study contributes towards a deeper understanding of chitin and chitosan biology, as well as provides a platform to engineer CDA biocatalysts. Structural and functional characterization of Klebsiella pneumonia ChbG (which lacks sequence homology) reveals the mechanism of chitooligosaccharide processing by ChbG.
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Hasan MK, Dhungel BA, Govind R. Characterization of an operon required for growth on cellobiose in Clostridioides difficile. MICROBIOLOGY (READING, ENGLAND) 2021; 167:001079. [PMID: 34410904 PMCID: PMC8489589 DOI: 10.1099/mic.0.001079] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 07/19/2021] [Indexed: 12/19/2022]
Abstract
Cellobiose metabolism is linked to the virulence properties in numerous bacterial pathogens. Here, we characterized a putative cellobiose PTS operon of Clostridiodes difficile to investigate the role of cellobiose metabolism in C. difficile pathogenesis. Our gene knockout experiments demonstrated that the putative cellobiose operon enables uptake of cellobiose into C. difficile and allows growth when cellobiose is provided as the sole carbon source in minimal medium. Additionally, using reporter gene fusion assays and DNA pulldown experiments, we show that its transcription is regulated by CelR, a novel transcriptional repressor protein, which directly binds to the upstream region of the cellobiose operon to control its expression. We have also identified cellobiose metabolism to play a significant role in C. difficile physiology as observed by the reduction of sporulation efficiency when cellobiose uptake was compromised in the mutant strain. In corroboration to in vitro study findings, our in vivo hamster challenge experiment showed a significant reduction of pathogenicity by the cellobiose mutant strain in both the primary and the recurrent infection model - substantiating the role of cellobiose metabolism in C. difficile pathogenesis.
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Affiliation(s)
- Md Kamrul Hasan
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
| | | | - Revathi Govind
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
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Review: Advances in preparation of chitooligosaccharides with heterogeneous sequences and their bioactivity. Carbohydr Polym 2020; 252:117206. [PMID: 33183640 DOI: 10.1016/j.carbpol.2020.117206] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 09/18/2020] [Accepted: 10/06/2020] [Indexed: 02/06/2023]
Abstract
Chitooligosaccharides has attracted increasing attention due to their diverse bioactivities and potential application. Previous studies on the bioactivity of chitooligosaccharides were mostly carried out using a mixture. The structure-function relationship of chitooligosaccharides is not clear. Recently, it is confirmed that chitooligosaccharides with different degrees of polymerization play different roles in many bioactivities. However, heterogeneous chitooligosaccharides with a single degree of polymerization is still a mixture of many uncertain sequences and it is difficult to determine which structure is responsible for biological effects. Therefore, an interesting and challenging field of studying chitooligosaccharides with heterogeneous sequences has emerged. Herein, we reviewed the current methods for preparing heterogeneous chitooligosaccharides, including chemical synthesis, separation techniques and enzymatic methods. Advances in the bioactivities of chitooligosaccharides with heterogeneous sequences are also reviewed.
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5
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Evolutionary analysis and protein family classification of chitin deacetylases in Cryptococcus neoformans. J Microbiol 2020; 58:805-811. [PMID: 32870486 DOI: 10.1007/s12275-020-0288-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/15/2020] [Accepted: 07/23/2020] [Indexed: 10/23/2022]
Abstract
Cryptococcus neoformans is an opportunistic fungal pathogen causing cryptococcal meningoencephalitis. Interestingly, the cell wall of C. neoformans contains chitosan, which is critical for its virulence and persistence in the mammalian host. C. neoformans (H99) has three chitin deacetylases (CDAs), which convert chitin to chitosan. Herein, the classification of the chitin-related protein (CRP) family focused on cryptococcal CDAs was analyzed by phylogenetics, evolutionary pressure (dN/dS), and 3D modeling. A phylogenetic tree of 110 CRPs revealed that they can be divided into two clades, CRP I and II with bootstrap values (> 99%). CRP I clade comprises five groups (Groups 1-5) with a total of 20 genes, while CRP II clade comprises sixteen groups (Groups 6-21) with a total of 90 genes. CRP I comprises only fungal CDAs, including all three C. neoformans CDAs, whereas CRP II comprises diverse CDAs from fungi, bacteria, and amoeba, along with other carbohydrate esterase 4 family proteins. All CDAs have the signal peptide, except those from group 11. Notably, CDAs with the putative O-gycosylation site possess either the glycosylphosphatidylinositol (GPI)-anchor motif for CRP I or the chitin-binding domain (CBD) for CRP II, respectively. This evolutionary conservation strongly indicates that the O-glycosylation modification and the presence of either the GPI-anchor motif or the chitin-binding domain is important for fungal CDAs to function efficiently at the cell surface. This study reveals that C. neoformans CDAs carrying GPI anchors have evolved divergently from fungal and bacterial CDAs, providing new insights into evolution and classification of CRP family.
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Wang S, Fu G, Li J, Wei X, Fang H, Huang D, Lin J, Zhang D. High-Efficiency Secretion and Directed Evolution of Chitinase BcChiA1 in Bacillus subtilis for the Conversion of Chitinaceous Wastes Into Chitooligosaccharides. Front Bioeng Biotechnol 2020; 8:432. [PMID: 32457893 PMCID: PMC7221128 DOI: 10.3389/fbioe.2020.00432] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 04/15/2020] [Indexed: 01/02/2023] Open
Abstract
Limitations of enzyme production and activity pose a challenge for efficient degradation of chitinaceous wastes. To solve this problem, we engineered a system for high-yielding extracellular secretion of chitinase A1 from Bacillus circulans (BcChiA1) in B. subtilis. Furthermore, an innovative chitinase high-throughput screening method based on colloidal chitin stained with Remazol Brilliant Blue R (CC-RBB) was established and used to identify three mutants with improved chitinase activity: Y10A/R301A/E327A (Mu1), Y10A/D81A/E327A (Mu2), and F38A/K88A/R301A (Mu3). Their highest specific activity reached 1004.83 ± 0.87 U/mg, representing a 16.89-fold increase in activity compared to native BcChiA1. Additionally, we found that there is a synergistic effect between BcChiA1 and a lytic polysaccharide monooxygenase from Bacillus atrophaeus (BatLPMO10), which increased the chitin processing efficiency by 50% after combining the two enzymes. The yield of chitooligosaccharide (COS) production using the mutant Mu1 and BatLPMO10 reached 2885.25 ± 2.22 mg/L. Taken together, the results indicated that the CC-RBB high-throughput screening method is a useful tool for chitinase screening, and evolution of BcChiA1 in collaboration with BatLPMO10 has tremendous application potential in the biological treatment of chitinaceous wastes for COS production.
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Affiliation(s)
- Sijia Wang
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Gang Fu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.,Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, China
| | - Jinlong Li
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.,Biodesign Center, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China
| | - Xunfan Wei
- College of Life Sciences, Nankai University, Tianjin, China
| | - Huan Fang
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.,Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, China
| | - Dawei Huang
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,College of Life Sciences, Nankai University, Tianjin, China
| | - Jianping Lin
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.,Biodesign Center, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.,College of Pharmacy, Nankai University, Tianjin, China
| | - Dawei Zhang
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.,Key Laboratory of Systems Microbial Biotechnology, Chinese Academy of Sciences, Tianjin, China
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He X, Yu M, Wu Y, Ran L, Liu W, Zhang XH. Two Highly Similar Chitinases from Marine Vibrio Species have Different Enzymatic Properties. Mar Drugs 2020; 18:E139. [PMID: 32120805 PMCID: PMC7143101 DOI: 10.3390/md18030139] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/21/2020] [Accepted: 02/25/2020] [Indexed: 12/16/2022] Open
Abstract
Chitinase, as one of the most important extracellular enzymes in the marine environment, has great ecological and applied values. In this study, two chitinases (Chi1557 and Chi4668) with 97.33% amino acid sequences identity were individually found in Vibrio rotiferianus and Vibrio harveyi. They both were encoding by 561 amino acids, but differed in 15 amino acids and showed different enzymatic properties. The optimal temperature and pH ranges were 45-50 °C and pH 5.0-7.0 for Chi1557, while ~50 °C and pH 3.0-6.0 for Chi4668. K+, Mg2+, and EDTA increased the enzymatic activity of Chi4668 significantly, yet these factors were inhibitory to Chi1557. Moreover, Chi1557 degraded colloidal chitin to produce (GlcNAc)2 and minor GlcNAc, whereas Chi4668 produce (GlcNAc)2 with minor (GlcNAc)3 and (GlcNAc)4. The Kcat/Km of Chi4668 was ~4.7 times higher than that of Chi1557, indicating that Chi4668 had stronger catalytic activity than Chi1557. Furthermore, site-directed mutagenesis was performed on Chi1557 focusing on seven conserved amino acid residues of family GH18 chitinases. Chi1557 was almost completely inactive after Glu154, Gln219, Tyr221, or Trp312 was individually mutated, retained ~50% activity after Tyr37 was mutated, and increased two times activity after Asp152 was mutated, indicating that these six amino acids were key sites for Chi1557.
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Affiliation(s)
- Xinxin He
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; (X.H.); (M.Y.); (Y.W.); (L.R.); (W.L.)
| | - Min Yu
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; (X.H.); (M.Y.); (Y.W.); (L.R.); (W.L.)
| | - Yanhong Wu
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; (X.H.); (M.Y.); (Y.W.); (L.R.); (W.L.)
| | - Lingman Ran
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; (X.H.); (M.Y.); (Y.W.); (L.R.); (W.L.)
| | - Weizhi Liu
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; (X.H.); (M.Y.); (Y.W.); (L.R.); (W.L.)
| | - Xiao-Hua Zhang
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; (X.H.); (M.Y.); (Y.W.); (L.R.); (W.L.)
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
- Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China
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Du J, Duan S, Miao J, Zhai M, Cao Y. Purification and characterization of chitinase from Paenibacillus sp. . Biotechnol Appl Biochem 2020; 68:30-40. [PMID: 31957084 DOI: 10.1002/bab.1889] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 01/15/2020] [Indexed: 11/10/2022]
Abstract
The chitinase-producing bacteria Paenibacillus sp. was isolated from soil samples. The chitinase was purified successively by ammonia sulfate fractional precipitation followed by chromatography on DEAE 52-cellulose column and then on Sephadex G-75 column. The chitinase has a molecular weight of ca. 30 kDa as measured by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) electrophoresis. Its optimum pH is 4.5, and its optimum temperature is 50 °C with colloidal chitin as a substrate. The enzyme is stable below 45 °C and in pH ranges between 4.5 and 5.5. It is activated by glucosamine, glucose, N-acetylglucosamine, and metal ions including Ca2+ , Fe2+ , Fe3+ , and Ni2+ . It is inhibited by SDS, H2 O2 , ascorbic acid, Cu2+ , Mg2+ , Ba2+ , Sn2+ , Cr3+ , and K+ . With colloidal chitin as substrate, the Km and the Vmax of the chitinase are 4.28 mg/mL and 14.29 μg/(Min·mL), respectively, whereas the end products of the enzymatic hydrolysis are 14.33% monomer and 85.67% dimer of N-acetylglucosamine. The viscosity of carboxymethyl chitin decreased rapidly at the initial stages when subjected to chitinase hydrolysis, which indicates that the chitinase acts in an endosplitting pattern.
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Affiliation(s)
- Jinghe Du
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, People's Republic of China.,Guangdong Ke Long Biotechnology Co., Ltd., Jingmen, People's Republic of China
| | - Shan Duan
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, People's Republic of China
| | - Jianyin Miao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, People's Republic of China
| | - Miaomiao Zhai
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, People's Republic of China
| | - Yong Cao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, People's Republic of China
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Xie M, Zhao X, Lü Y, Jin C. Chitin deacetylases Cod4 and Cod7 are involved in polar growth of Aspergillus fumigatus. Microbiologyopen 2019; 9:e00943. [PMID: 31602821 PMCID: PMC6957412 DOI: 10.1002/mbo3.943] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/07/2019] [Accepted: 09/16/2019] [Indexed: 01/01/2023] Open
Abstract
Chitin is one of the key components of fungal cell wall, and chitin deacetylases (CDAs) have been found in fungi; however, their functions remain unknown. Aspergillus fumigatus is known to cause fatal invasive aspergillosis (IA) among immunocompromised patients with a high mortality rate. Although the A. fumigatus cell wall has long been taken as a unique target for drug development, its dynamic remodeling is complicated and not well understood. Seven putative CDAs are annotated in the A. fumigatus genome. In this study, we analyzed the function of the putative CDAs, Cod4 and Cod7, in A. fumigatus. Biochemical analysis of recombinant proteins showed that Cod4 preferentially deacetylated (GlcNAc)4 and was less active on chitooligosaccharides with DP > 5, whereas Cod7 was unable to catalyze deacetylation. Simulation of three‐dimensional structure revealed that both Cod4 and Cod7 shared a similar folding pattern with HyPgdA from Helicobacter pylori and, similar to HyPgdA, a substitution of Thr8 by Ala8 in Cod7 abolished its CDA activity. Deletion of the cod4, cod7, or both in A. fumigatus led to polarity abnormality and increased conidiation. Furthermore, the expression level of the genes related to polarity was upregulated in the mutants. Our results demonstrated that Cod4 and Cod7 were involved in polarity, though Cod4 was inactive.
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Affiliation(s)
- Mingming Xie
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | | | - Yang Lü
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Cheng Jin
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,National Engineering Research Center for Non-food Bio-refinery, Guangxi Academy of Sciences, Nanning, China
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Chitin Heterodisaccharide, Released from Chitin by Chitinase and Chitin Oligosaccharide Deacetylase, Enhances the Chitin-Metabolizing Ability of Vibrio parahaemolyticus. J Bacteriol 2019; 201:JB.00270-19. [PMID: 31358611 DOI: 10.1128/jb.00270-19] [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] [Received: 04/15/2019] [Accepted: 07/24/2019] [Indexed: 11/20/2022] Open
Abstract
Vibrio parahaemolyticus RIMD2210633 secretes both chitinase and chitin oligosaccharide deacetylase and produces β-N-acetyl-d-glucosaminyl-(1,4)-d-glucosamine (GlcNAc-GlcN) from chitin. Previously, we reported that GlcNAc-GlcN induces chitinase production by several strains of Vibrio harboring chitin oligosaccharide deacetylase genes (T. Hirano, K. Kadokura, T. Ikegami, Y. Shigeta, et al., Glycobiology 19:1046-1053, 2009). The metabolism of chitin by Vibrio was speculated on the basis of the findings of previous studies, and the role of chitin oligosaccharide produced from chitin has been well studied. However, the role of GlcNAc-GlcN in the Vibrio chitin degradation system, with the exception of the above-mentioned function as an inducer of chitinase production, remains unclear. N,N'-Diacetylchitobiose, a homodisaccharide produced from chitin, is known to induce the expression of genes encoding several proteins involved in chitin metabolism in Vibrio strains (K. L. Meibom, X. B. Li, A. Nielsen, C. Wu, et al., Proc Natl Acad Sci U S A 101:2524-2529, 2004). We therefore hypothesized that GlcNAc-GlcN also affects the expression of enzymes involved in chitin metabolism in the same manner. In this study, we examined the induction of protein expression by several sugars released from chitin using peptide mass fingerprinting and confirmed the expression of genes encoding enzymes involved in chitin metabolism using real-time quantitative PCR analysis. We then confirmed that GlcNAc-GlcN induces the expression of genes encoding many soluble enzymes involved in chitin degradation in Vibrio parahaemolyticus Here, we demonstrate that GlcNAc-GlcN enhances the chitin-metabolizing ability of V. parahaemolyticus IMPORTANCE We demonstrate that β-N-acetyl-d-glucosaminyl-(1,4)-d-glucosamine (GlcNAc-GlcN) enhances the chitin-metabolizing ability of V. parahaemolyticus Members of the genus Vibrio are chitin-degrading bacteria, and some species of this genus are associated with diseases affecting fish and animals, including humans (F. L. Thompson, T. Iida, and J. Swings, Microbiol Mol Biol Rev 68:403-431, 2004; M. Y. Ina-Salwany, N. Al-Saari, A. Mohamad, F.-A. Mursidi, et al., J Aquat Anim Health 31:3-22, 2019). Studies on Vibrio are considered important, as they may facilitate the development of solutions related to health, food, and aquaculture problems attributed to this genus. This report enhances the current understanding of chitin degradation by Vibrio bacteria.
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Bhat P, Pawaskar GM, Raval R, Cord-Landwehr S, Moerschbacher B, Raval K. Expression of Bacillus licheniformis chitin deacetylase in E. coli pLysS: Sustainable production, purification and characterisation. Int J Biol Macromol 2019; 131:1008-1013. [DOI: 10.1016/j.ijbiomac.2019.03.144] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 03/18/2019] [Accepted: 03/21/2019] [Indexed: 02/01/2023]
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12
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Emruzi Z, Aminzadeh S, Karkhane AA, Alikhajeh J, Haghbeen K, Gholami D. Improving the thermostability of Serratia marcescens B4A chitinase via G191V site-directed mutagenesis. Int J Biol Macromol 2018; 116:64-70. [PMID: 29733926 DOI: 10.1016/j.ijbiomac.2018.05.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 04/26/2018] [Accepted: 05/03/2018] [Indexed: 11/24/2022]
Abstract
Chitinases with high thermostability are important for many industrial and biotechnological applications. This study was conducted to enhance the stability of Serratia marcescens B4A chitinase by site directed mutagenesis of G191 V. Further characterization showed that the thermal stability of the mutant showed marked increase of about 5 and 15 fold at 50 and 60 °C respectively, while the optimum temperature and pH was retained. Kinetic analysis showed decreased Km and Vmax of the mutant in comparison with the wild type chitinase of about 1.3 and 3 fold, respectively. Based on structural prediction, it was speculated that this replacement shortened an important loop concomitant with the extension of adjacent β sheets. Accordingly, a higher thermostability of G191 V up to 90 °C supporting the decreased flexibility of unfolded state was also indicated. Finally, a practical proof of kinetic and thermal stabilization of chitinase was provided through decreased flexibility and entropic stabilization of its surface loops.
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Affiliation(s)
- Zeinab Emruzi
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, (NIGEB), Tehran, Iran
| | - Saeed Aminzadeh
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, (NIGEB), Tehran, Iran.
| | - Ali Asghar Karkhane
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, (NIGEB), Tehran, Iran
| | - Jahan Alikhajeh
- Departments of Physiology and Cellular Biophysics, Columbia University Medical Center, USA
| | - Kamahldin Haghbeen
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, (NIGEB), Tehran, Iran
| | - Dariush Gholami
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, (NIGEB), Tehran, Iran
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13
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Chitin Deacetylases: Structures, Specificities, and Biotech Applications. Polymers (Basel) 2018; 10:polym10040352. [PMID: 30966387 PMCID: PMC6415152 DOI: 10.3390/polym10040352] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/15/2018] [Accepted: 03/19/2018] [Indexed: 12/20/2022] Open
Abstract
Depolymerization and de-N-acetylation of chitin by chitinases and deacetylases generates a series of derivatives including chitosans and chitooligosaccharides (COS), which are involved in molecular recognition events such as modulation of cell signaling and morphogenesis, immune responses, and host-pathogen interactions. Chitosans and COS are also attractive scaffolds for the development of bionanomaterials for drug/gene delivery and tissue engineering applications. Most of the biological activities associated with COS seem to be largely dependent not only on the degree of polymerization but also on the acetylation pattern, which defines the charge density and distribution of GlcNAc and GlcNH₂ moieties in chitosans and COS. Chitin de-N-acetylases (CDAs) catalyze the hydrolysis of the acetamido group in GlcNAc residues of chitin, chitosan, and COS. The deacetylation patterns are diverse, some CDAs being specific for single positions, others showing multiple attack, processivity or random actions. This review summarizes the current knowledge on substrate specificity of bacterial and fungal CDAs, focusing on the structural and molecular aspects of their modes of action. Understanding the structural determinants of specificity will not only contribute to unravelling structure-function relationships, but also to use and engineer CDAs as biocatalysts for the production of tailor-made chitosans and COS for a growing number of applications.
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Hoßbach J, Bußwinkel F, Kranz A, Wattjes J, Cord-Landwehr S, Moerschbacher BM. A chitin deacetylase of Podospora anserina has two functional chitin binding domains and a unique mode of action. Carbohydr Polym 2018; 183:1-10. [DOI: 10.1016/j.carbpol.2017.11.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 11/02/2017] [Accepted: 11/02/2017] [Indexed: 02/06/2023]
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15
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Suginta W, Sritho N, Ranok A, Bulmer DM, Kitaoku Y, van den Berg B, Fukamizo T. Structure and function of a novel periplasmic chitooligosaccharide-binding protein from marine Vibrio bacteria. J Biol Chem 2018; 293:5150-5159. [PMID: 29444825 DOI: 10.1074/jbc.ra117.001012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 02/11/2018] [Indexed: 12/11/2022] Open
Abstract
Periplasmic solute-binding proteins in bacteria are involved in the active transport of nutrients into the cytoplasm. In marine bacteria of the genus Vibrio, a chitooligosaccharide-binding protein (CBP) is thought to be the major solute-binding protein controlling the rate of chitin uptake in these bacteria. However, the molecular mechanism of the CBP involvement in chitin metabolism has not been elucidated. Here, we report the structure and function of a recombinant chitooligosaccharide-binding protein from Vibrio harveyi, namely VhCBP, expressed in Escherichia coli Isothermal titration calorimetry revealed that VhCBP strongly binds shorter chitooligosaccharides ((GlcNAc) n , where n = 2, 3, and 4) with affinities that are considerably greater than those for glycoside hydrolase family 18 and 19 chitinases but does not bind longer ones, including insoluble chitin polysaccharides. We also found that VhCBP comprises two domains with flexible linkers and that the domain-domain interface forms the sugar-binding cleft, which is not long extended but forms a small cavity. (GlcNAc)2 bound to this cavity, apparently triggering a closed conformation of VhCBP. Trp-363 and Trp-513, which stack against the two individual GlcNAc rings, likely make a major contribution to the high affinity of VhCBP for (GlcNAc)2 The strong chitobiose binding, followed by the conformational change of VhCBP, may facilitate its interaction with an active-transport system in the inner membrane of Vibrio species.
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Affiliation(s)
- Wipa Suginta
- From the Biochemistry-Electrochemistry Research Unit, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand,
| | - Natchanok Sritho
- From the Biochemistry-Electrochemistry Research Unit, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Araya Ranok
- Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand
| | - David Michael Bulmer
- the Institute for Cell and Molecular Biosciences, The Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, United Kingdom, and
| | - Yoshihito Kitaoku
- the Department of Advanced Bioscience, Kindai University, Nara 631-8505 Japan
| | - Bert van den Berg
- the Institute for Cell and Molecular Biosciences, The Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, United Kingdom, and
| | - Tamo Fukamizo
- From the Biochemistry-Electrochemistry Research Unit, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.,the Department of Advanced Bioscience, Kindai University, Nara 631-8505 Japan
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Substrate Recognition and Specificity of Chitin Deacetylases and Related Family 4 Carbohydrate Esterases. Int J Mol Sci 2018; 19:ijms19020412. [PMID: 29385775 PMCID: PMC5855634 DOI: 10.3390/ijms19020412] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 01/22/2018] [Accepted: 01/24/2018] [Indexed: 12/27/2022] Open
Abstract
Carbohydrate esterases family 4 (CE4 enzymes) includes chitin and peptidoglycan deacetylases, acetylxylan esterases, and poly-N-acetylglucosamine deacetylases that act on structural polysaccharides, altering their physicochemical properties, and participating in diverse biological functions. Chitin and peptidoglycan deacetylases are not only involved in cell wall morphogenesis and remodeling in fungi and bacteria, but they are also used by pathogenic microorganisms to evade host defense mechanisms. Likewise, biofilm formation in bacteria requires partial deacetylation of extracellular polysaccharides mediated by poly-N-acetylglucosamine deacetylases. Such biological functions make these enzymes attractive targets for drug design against pathogenic fungi and bacteria. On the other side, acetylxylan esterases deacetylate plant cell wall complex xylans to make them accessible to hydrolases, making them attractive biocatalysts for biomass utilization. CE4 family members are metal-dependent hydrolases. They are highly specific for their particular substrates, and show diverse modes of action, exhibiting either processive, multiple attack, or patterned deacetylation mechanisms. However, the determinants of substrate specificity remain poorly understood. Here, we review the current knowledge on the structure, activity, and specificity of CE4 enzymes, focusing on chitin deacetylases and related enzymes active on N-acetylglucosamine-containing oligo and polysaccharides.
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Raval R, Simsa R, Raval K. Expression studies of Bacillus licheniformis chitin deacetylase in E. coli Rosetta cells. Int J Biol Macromol 2017; 104:1692-1696. [DOI: 10.1016/j.ijbiomac.2017.01.151] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/06/2017] [Accepted: 01/23/2017] [Indexed: 10/20/2022]
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18
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Uehara A, Takahashi N, Moriyama M, Hirano T, Hakamata W, Nishio T. Synthesis of Chitin Oligosaccharides Using Dried Stenotrophomonas maltophilia Cells Containing a Transglycosylation Reaction-Catalyzing β-N-Acetylhexosaminidase as a Whole-Cell Catalyst. Appl Biochem Biotechnol 2017; 184:673-684. [DOI: 10.1007/s12010-017-2585-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 08/16/2017] [Indexed: 10/19/2022]
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Guo X, Xu P, Zong M, Lou W. Purification and characterization of alkaline chitinase from Paenibacillus pasadenensis CS0611. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(17)62787-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Kawasaki Y, Endo T, Fujiwara A, Kondo K, Katahira M, Nittami T, Sato M, Takeda M. Elongation pattern and fine structure of the sheaths formed by Thiothrix nivea and Thiothrix fructosivorans. Int J Biol Macromol 2017; 95:1280-1288. [DOI: 10.1016/j.ijbiomac.2016.11.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/08/2016] [Accepted: 11/08/2016] [Indexed: 10/20/2022]
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21
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Ecological fitness and virulence features of Vibrio parahaemolyticus in estuarine environments. Appl Microbiol Biotechnol 2017; 101:1781-1794. [PMID: 28144705 DOI: 10.1007/s00253-017-8096-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 12/22/2016] [Accepted: 01/02/2017] [Indexed: 12/11/2022]
Abstract
Vibrio parahaemolyticus is a commonly encountered and highly successful organism in marine ecosystems. It is a fast-growing, extremely versatile copiotroph that is active over a very broad range of conditions. It frequently occurs suspended in the water column (often attached to particles or zooplankton), and is a proficient colonist of submerged surfaces. This organism is an important pathogen of animals ranging from microcrustaceans to humans and is a causative agent of seafood-associated food poisoning. This review examines specific ecological adaptations of V. parahaemolyticus, including its broad tolerances to temperature and salinity, its utilization of a wide variety of organic carbon and energy sources, and its pervasive colonization of suspended and stationary materials that contribute to its success and ubiquity in temperate and tropical estuarine ecosystems. Several virulence-related features are examined, in particular the thermostable direct hemolysin (TDH), the TDH-related hemolysin (TRH), and the type 3 secretion system, and the possible importance of these features in V. parahaemolyticus pathogenicity is explored. The impact of new and much more effective PCR primers on V. parahaemolyticus detection and our views of virulent strain abundance are also described. It is clear that strains carrying the canonical virulence genes are far more common than previously thought, which opens questions regarding the role of these genes in pathogenesis. It is also clear that virulence is an evolving feature of V. parahaemolyticus and that novel combinations of virulence factors can lead to emergent virulence in which a strain that is markedly more pathogenic evolves and propagates to produce an outbreak. The effects of global climate change on the frequency of epidemic disease, the geographic distribution of outbreaks, and the human impacts of V. parahaemolyticus are increasing and this review provides information on why this ubiquitous human pathogen has increased its footprint and its significance so dramatically.
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Paulsen SS, Andersen B, Gram L, Machado H. Biological Potential of Chitinolytic Marine Bacteria. Mar Drugs 2016; 14:md14120230. [PMID: 27999269 PMCID: PMC5192467 DOI: 10.3390/md14120230] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 12/07/2016] [Accepted: 12/08/2016] [Indexed: 12/26/2022] Open
Abstract
Chitinolytic microorganisms secrete a range of chitin modifying enzymes, which can be exploited for production of chitin derived products or as fungal or pest control agents. Here, we explored the potential of 11 marine bacteria (Pseudoalteromonadaceae, Vibrionaceae) for chitin degradation using in silico and phenotypic assays. Of 10 chitinolytic strains, three strains, Photobacterium galatheae S2753, Pseudoalteromonas piscicida S2040 and S2724, produced large clearing zones on chitin plates. All strains were antifungal, but against different fungal targets. One strain, Pseudoalteromonas piscicida S2040, had a pronounced antifungal activity against all seven fungal strains. There was no correlation between the number of chitin modifying enzymes as found by genome mining and the chitin degrading activity as measured by size of clearing zones on chitin agar. Based on in silico and in vitro analyses, we cloned and expressed two ChiA-like chitinases from the two most potent candidates to exemplify the industrial potential.
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Affiliation(s)
- Sara Skøtt Paulsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Birgitte Andersen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Lone Gram
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Henrique Machado
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
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A Recombinant Fungal Chitin Deacetylase Produces Fully Defined Chitosan Oligomers with Novel Patterns of Acetylation. Appl Environ Microbiol 2016; 82:6645-6655. [PMID: 27590819 DOI: 10.1128/aem.01961-16] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 08/27/2016] [Indexed: 11/20/2022] Open
Abstract
Partially acetylated chitosan oligosaccharides (paCOS) are potent biologics with many potential applications, and their bioactivities are believed to be dependent on their structure, i.e., their degrees of polymerization and acetylation, as well as their pattern of acetylation. However, paCOS generated via chemical N-acetylation or de-N-acetylation of GlcN or GlcNAc oligomers, respectively, typically display random patterns of acetylation, making it difficult to control and predict their bioactivities. In contrast, paCOS produced from chitin deacetylases (CDAs) acting on chitin oligomer substrates may have specific patterns of acetylation, as shown for some bacterial CDAs. However, compared to what we know about bacterial CDAs, we know little about the ability of fungal CDAs to produce defined paCOS with known patterns of acetylation. Therefore, we optimized the expression of a chitin deacetylase from the fungus Puccinia graminis f. sp. tritici in Escherichia coli The best yield of functional enzyme was obtained as a fusion protein with the maltose-binding protein (MBP) secreted into the periplasmic space of the bacterial host. We characterized the MBP fusion protein from P. graminis (PgtCDA) and tested its activity on different chitinous substrates. Mass spectrometric sequencing of the products obtained by enzymatic deacetylation of chitin oligomers, i.e., tetramers to hexamers, revealed that PgtCDA generated paCOS with specific acetylation patterns of A-A-D-D, A-A-D-D-D, and A-A-D-D-D-D, respectively (A, GlcNAc; D, GlcN), indicating that PgtCDA cannot deacetylate the two GlcNAc units closest to the oligomer's nonreducing end. This unique property of PgtCDA significantly expands the so far very limited library of well-defined paCOS available to test their bioactivities for a wide variety of potential applications. IMPORTANCE We successfully achieved heterologous expression of a fungal chitin deacetylase gene from the basidiomycete Puccinia graminis f. sp. tritici in the periplasm of E. coli as a fusion protein with the maltose-binding protein; this strategy allows the production of these difficult-to-express enzymes in sufficient quantities for them to be characterized and optimized through protein engineering. Here, the recombinant enzyme was used to produce partially acetylated chitosan oligosaccharides from chitin oligomers, whereby the pronounced regioselectivity of the enzyme led to the production of defined products with novel patterns of acetylation. This approach widens the scope for both the production and functional analysis of chitosan oligomers and thus will eventually allow the detailed molecular structure-function relationships of biologically active chitosans to be studied, which is essential for developing applications for these functional biopolymers for a circular bioeconomy, e.g., in agriculture, medicine, cosmetics, and food sciences.
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Liu Y, Yan Q, Yang S, Jiang Z. Novel Protease-Resistant Exochitinase (Echi47) from Pig Fecal Environment DNA with Application Potentials in the Food and Feed Industries. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:6262-6270. [PMID: 26084498 DOI: 10.1021/acs.jafc.5b01457] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel exochitinase gene (Echi47) was directly cloned from the pig fecal environment DNA using the genomic walking PCR technique and expressed in Escherichia coli BL21 (DE3). Echi47 has an open reading frame (ORF) of 1,161 bp encoding 386 amino acids. The amino acid sequence of Echi47 showed 36% identity with that of chitinase from Coprinellus congregatus. The recombinant exochitinase was purified with specific activity toward colloidal chitin of 6.84 U/mg. Echi47 was optimally active at pH 5.0 and 40 °C, respectively. When colloidal chitin was used as substrate, N-acetylchitobiose [(GlcNAc)2] was mostly produced at the initial stage, suggesting that it is an exochitinase. Echi47 exhibited excellent resistance to pepsin, trypsin, proteinase K, and flavor protease. Under simulated alimentary tract conditions, Echi47 was stable and active, releasing 21.1 mg of N-acetylchitooligosaccharides from 80 mg of colloidal chitin. These properties make Echi47 a potential additive in the food and feed industries.
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Affiliation(s)
- Yuchun Liu
- †Department of Biotechnology, College of Food Science and Nutritional Engineering, and ‡Bioresource Utilization Laboratory, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Qiaojuan Yan
- †Department of Biotechnology, College of Food Science and Nutritional Engineering, and ‡Bioresource Utilization Laboratory, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Shaoqing Yang
- †Department of Biotechnology, College of Food Science and Nutritional Engineering, and ‡Bioresource Utilization Laboratory, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Zhengqiang Jiang
- †Department of Biotechnology, College of Food Science and Nutritional Engineering, and ‡Bioresource Utilization Laboratory, College of Engineering, China Agricultural University, Beijing 100083, China
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25
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Meekrathok P, Bürger M, Porfetye AT, Vetter IR, Suginta W. Expression, purification, crystallization and preliminary crystallographic analysis of a GH20 β-N-acetylglucosaminidase from the marine bacterium Vibrio harveyi. Acta Crystallogr F Struct Biol Commun 2015; 71:427-33. [PMID: 25849504 PMCID: PMC4388178 DOI: 10.1107/s2053230x1500415x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 02/27/2015] [Indexed: 11/10/2022] Open
Abstract
Vibrio harveyi β-N-acetylglucosaminidase (VhGlcNAcase) is a new member of the GH20 glycoside hydrolase family responsible for the complete degradation of chitin fragments, with N-acetylglucosamine (GlcNAc) monomers as the final products. In this study, the crystallization and preliminary crystallographic data of wild-type VhGlcNAcase and its catalytically inactive mutant D437A in the absence and the presence of substrate are reported. Crystals of wild-type VhGlcNAcase were grown in 0.1 M sodium acetate pH 4.6, 1.4 M sodium malonate, while crystals of the D437A mutant were obtained in 0.1 M bis-tris pH 7.5, 0.1 M sodium acetate, 20% PEG 3350. X-ray data from the wild-type and the mutant crystals were collected at a synchrotron-radiation light source and were complete to a resolution of 2.5 Å. All crystals were composed of the same type of dimer, with the substrate N,N'-diacetylglucosamine (GlcNAc₂ or diNAG) used for soaking was cleaved by the active enzyme, leaving only a single GlcNAc molecule bound to the protein.
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Affiliation(s)
- Piyanat Meekrathok
- Biochemistry–Electrochemistry Research Unit, School of Biochemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Marco Bürger
- Max Planck Institute of Molecular Physiology, 44227 Dortmund, Germany
| | | | - Ingrid R. Vetter
- Max Planck Institute of Molecular Physiology, 44227 Dortmund, Germany
| | - Wipa Suginta
- Biochemistry–Electrochemistry Research Unit, School of Biochemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
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Saccharification of β-chitin from squid pen by a fermentation method using recombinant chitinase-secreting Escherichia coli. Appl Biochem Biotechnol 2015; 175:3788-99. [PMID: 25725799 DOI: 10.1007/s12010-015-1547-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 02/09/2015] [Indexed: 10/23/2022]
Abstract
Two strains [BL21(DE3) and HMS174(DE3)] of Escherichia coli harboring the recombinant chitinase expression plasmid pVP-Chi, which contains Vibrio parahaemolyticus chitinase gene with an attached signal sequence, were prepared. These E. coli transformants produced a large amount of recombinant chitinase, which hydrolyzes chitin to yield di-N-acetylchitobiose (GlcNAc)2, under the presence of isopropyl-1-thio-β-D-galactopyranoside (IPTG), and secreted the enzyme into their culture fluid with the aid of the signal peptide. Cultivation of these E. coli transformants in Luria-Bertani medium containing squid pen β-chitin and IPTG gave rise to the decomposition of this polysaccharide and the accumulation of (GlcNAc)2 in the culture fluid. Through these experiments, we confirmed that the use of strain HMS174(DE3) was preferable for the stable accumulation of (GlcNAc)2 in the culture fluid during cultivation owing to lower (GlcNAc)2 assimilation compared to BL21(DE3). Next, using E. coli HMS174(DE3) transformants, we conducted saccharification of different forms (fluffy fiber, flake, and powder) of β-chitin samples prepared from squid pens in Bacterion-N-KS(B)K medium containing 2 % of each sample under the presence of IPTG. In these experiments, (GlcNAc)2 was isolated with a more than 20 % stoichiometric yield from each culture supernatant through charcoal column chromatography followed by recrystallization.
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Stoykov YM, Pavlov AI, Krastanov AI. Chitinase biotechnology: Production, purification, and application. Eng Life Sci 2014. [DOI: 10.1002/elsc.201400173] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Yuriy Mihaylov Stoykov
- Laboratory of Applied Biotechnologies; Stephan Angeloff Institute of Microbiology; Bulgarian Academy of Science; Plovdiv Bulgaria
| | - Atanas Ivanov Pavlov
- Laboratory of Applied Biotechnologies; Stephan Angeloff Institute of Microbiology; Bulgarian Academy of Science; Plovdiv Bulgaria
- Department of Analytical Chemistry; University of Food Technology; Plovdiv Bulgaria
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Hirano T, Sugiyama K, Sakaki Y, Hakamata W, Park SY, Nishio T. Structure-based analysis of domain function of chitin oligosaccharide deacetylase fromVibrio parahaemolyticus. FEBS Lett 2014; 589:145-51. [DOI: 10.1016/j.febslet.2014.11.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 11/15/2014] [Accepted: 11/21/2014] [Indexed: 10/24/2022]
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Pareek N, Ghosh S, Singh R, Vivekanand V. Mustard oil cake as an inexpensive support for production of chitin deacetylase by Penicillium oxalicum SAEM-51 under solid-state fermentation. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2014. [DOI: 10.1016/j.bcab.2014.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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30
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Zhang P, Liu W, Peng Y, Han B, Yang Y. Toll like receptor 4 (TLR4) mediates the stimulating activities of chitosan oligosaccharide on macrophages. Int Immunopharmacol 2014; 23:254-61. [PMID: 25237008 DOI: 10.1016/j.intimp.2014.09.007] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 09/05/2014] [Accepted: 09/05/2014] [Indexed: 11/19/2022]
Abstract
The in vivo and in vitro immunostimulating properties of chitosan oligosaccharide (COS) prepared by enzymatic hydrolysis of chitosan and the mechanisms mediating the effects were investigated. Our data showed that the highly active chitosanase isolated could hydrolyze chitosan to the polymerization degree of 3-8. The resulting COS was an efficient immunostimulator. COS markedly enhanced the proliferation and neutral red phagocytosis by RAW 264.7 macrophages. The production of nitric oxide (NO) and tumor necrosis factor alpha (TNF-α) by macrophages was significantly increased after incubation with COS. Oral administration of COS in mice could increase spleen index and serum immunoglobin G (IgG) contents. COS was labeled with FITC to study the pinocytosis by macrophages. Results showed that FITC-COS was phagocyted by macrophages and anti-murine TLR4 antibody completely blocked FITC-COS pinocytosis. RT-PCR indicated that COS treatment of macrophages significantly increased TLR4 and inducible nitric oxide synthase (iNOS) mRNA levels. When cells were pretreated with anti-murine TLR4 antibody, the effect of COS on TLR4 and iNOS mRNA induction was decreased. COS-induced NO secretion by macrophages was also markedly decreased by anti-murine TLR4 antibody pretreatment. In conclusion, the present study revealed that COS possesses potent immune-stimulating properties by activating TLR4 on macrophages.
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Affiliation(s)
- Pei Zhang
- Biochemistry Laboratory, College of Marine Life Sciences, Ocean University of China, Yushan Road 5, Qingdao 266003, PR China.
| | - Weizhi Liu
- Biochemistry Laboratory, College of Marine Life Sciences, Ocean University of China, Yushan Road 5, Qingdao 266003, PR China.
| | - Yanfei Peng
- Biochemistry Laboratory, College of Marine Life Sciences, Ocean University of China, Yushan Road 5, Qingdao 266003, PR China.
| | - Baoqin Han
- Biochemistry Laboratory, College of Marine Life Sciences, Ocean University of China, Yushan Road 5, Qingdao 266003, PR China.
| | - Yan Yang
- Biochemistry Laboratory, College of Marine Life Sciences, Ocean University of China, Yushan Road 5, Qingdao 266003, PR China.
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31
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Suresh PV, Sakhare PZ, Sachindra NM, Halami PM. Extracellular chitin deacetylase production in solid state fermentation by native soil isolates of Penicillium monoverticillium and Fusarium oxysporum. Journal of Food Science and Technology 2014; 51:1594-9. [PMID: 25114353 DOI: 10.1007/s13197-012-0676-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 02/24/2012] [Accepted: 03/01/2012] [Indexed: 11/24/2022]
Abstract
Extracellular chitin deacetylase production by native soil isolates of Penicillium monoverticillium CFR 2 and Fusarium oxysporum CFR 8 in solid state fermentation (SSF) using commercial wheat bran (CWB) and shrimp processing by-products (SPP) as solid substrate has been studied. P. monoverticillium produced maximum chitin deacetylase activity of 547.7 ± 45 and 390.2 ± 31 units/g initial dry substrate (U/g IDS) at 96 h of incubation in CWB and SPP media, respectively. While, F. oxysporum produced maximum chitin deacetylase activity of 306.4 ± 22 U/g IDS at 72 h of incubation in CWB medium and 220.1 ± 20 U/g IDS at 120 h of incubation in SPP medium. Along with chitin deacetylase, P. monoverticillium and F. oxysporum produced other chitin degrading enzymes such as endo-chitinase and β-N-acetylhexosaminidase. P. monoverticillium produced maximum activity (U/g IDS) of endo-chitinase 4.6 ± 0.20 at 120 h incubation and β-N-acetylhexosaminidase 82.6 ± 03 at 120 h incubation in CWB medium. While, F. oxysporum produced maximum activity (U/g IDS) of endo-chitinase 7.8 ± 0.20 at 144 h incubation and β-N-acetylhexosaminidase 38.3 ± 02 at 120 h incubation in CWB medium. Production of extracellular chitin deacetylase by P. monoverticillium CFR 2 and F. oxysporum CFR 8 in SSF is being reported for the first time.
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Affiliation(s)
- P V Suresh
- Meat, Fish and Poultry Technology Department, CSIR-Central Food Technological Research Institute, Mysore, 570020 India
| | - P Z Sakhare
- Meat, Fish and Poultry Technology Department, CSIR-Central Food Technological Research Institute, Mysore, 570020 India
| | - N M Sachindra
- Meat, Fish and Poultry Technology Department, CSIR-Central Food Technological Research Institute, Mysore, 570020 India
| | - P M Halami
- Department of Food Microbiology, CSIR-Central Food Technological Research Institute, Mysore, 570020 India
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Production and Secretion of a RecombinantVibrio parahaemolyticusChitinase byEscherichia coliand Its Purification from the Culture Medium. Biosci Biotechnol Biochem 2014; 71:2848-51. [DOI: 10.1271/bbb.70389] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hamer SN, Moerschbacher BM, Kolkenbrock S. Enzymatic sequencing of partially acetylated chitosan oligomers. Carbohydr Res 2014; 392:16-20. [PMID: 24824785 DOI: 10.1016/j.carres.2014.04.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 04/02/2014] [Accepted: 04/03/2014] [Indexed: 11/24/2022]
Abstract
Chitosan oligosaccharides have diverse biological activities with potentially valuable applications, for example, in the fields of medicine and agriculture. These functionalities are thought to depend on their degree of polymerization and acetylation, and possibly on specific patterns of acetylation. Chitosan oligomers with fully defined architecture are difficult to produce, and their complete analysis is demanding. Analysis is typically done using MS or NMR, requiring access to expensive infrastructure, and yielding unequivocal results only in the case of rather small oligomers. We here describe a simple and cost-efficient method for the sequencing of μg amounts of chitosan oligosaccharides which is based on the sequential action of two recombinant glycosidases, namely an exo-β-N-acetylhexosaminidase (GlcNAcase) from Bacillus subtilis 168 and an exo-β-d-glucosaminidase (GlcNase) from Thermococcus kodakarensis KOD1. Starting from the non-reducing end, GlcNAcase and GlcNase specifically remove N-acetyl glucosamine (A) and glucosamine (D) units, respectively. By the sequential addition and removal of these enzymes in an alternating way followed by analysis of the products using high-performance thin-layer chromatography, the sequence of chitosan oligosaccharides can be revealed. Importantly, both enzymes work under identical conditions so that no buffer exchange is required between steps, and the enzyme can be removed conveniently using simple ultra-filtration devices. As proof-of-principle, the method was used to sequence the product of enzymatic deacetylation of chitin pentamer using a recombinant chitin deacetylase from Vibrio cholerae which specifically removes the acetyl group from the second unit next to the non-reducing end of the substrate, yielding mono-deacetylated pentamer with the sequence ADAAA.
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Affiliation(s)
- Stefanie Nicole Hamer
- Institute of Plant Biology and Biotechnology, Westphalian Wilhelm's-University Münster, Schlossplatz 8, 48143 Münster, Germany.
| | - Bruno Maria Moerschbacher
- Institute of Plant Biology and Biotechnology, Westphalian Wilhelm's-University Münster, Schlossplatz 8, 48143 Münster, Germany.
| | - Stephan Kolkenbrock
- Institute of Plant Biology and Biotechnology, Westphalian Wilhelm's-University Münster, Schlossplatz 8, 48143 Münster, Germany.
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Haley BJ, Kokashvili T, Tskshvediani A, Janelidze N, Mitaishvili N, Grim CJ, Constantin de Magny G, Chen AJ, Taviani E, Eliashvili T, Tediashvili M, Whitehouse CA, Colwell RR, Huq A. Molecular diversity and predictability of Vibrio parahaemolyticus along the Georgian coastal zone of the Black Sea. Front Microbiol 2014; 5:45. [PMID: 24575085 PMCID: PMC3918589 DOI: 10.3389/fmicb.2014.00045] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 01/21/2014] [Indexed: 11/25/2022] Open
Abstract
Vibrio parahaemolyticus is a leading cause of seafood-related gastroenteritis and is also an autochthonous member of marine and estuarine environments worldwide. One-hundred seventy strains of V. parahaemolyticus were isolated from water and plankton samples collected along the Georgian coast of the Black Sea during 28 months of sample collection. All isolated strains were tested for presence of tlh, trh, and tdh. A subset of strains were serotyped and tested for additional factors and markers of pandemicity. Twenty-six serotypes, five of which are clinically relevant, were identified. Although all 170 isolates were negative for tdh, trh, and the Kanagawa Phenomenon, 7 possessed the GS-PCR sequence and 27 the 850 bp sequence of V. parahaemolyticus pandemic strains. The V. parahaemolyticus population in the Black Sea was estimated to be genomically heterogeneous by rep-PCR and the serodiversity observed did not correlate with rep-PCR genomic diversity. Statistical modeling was used to predict presence of V. parahaemolyticus as a function of water temperature, with strongest concordance observed for Green Cape site samples (Percent of total variance = 70, P < 0.001). Results demonstrate a diverse population of V. parahaemolyticus in the Black Sea, some of which carry pandemic markers, with increased water temperature correlated to an increase in abundance of V. parahaemolyticus.
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Affiliation(s)
- Bradd J Haley
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA
| | - Tamar Kokashvili
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Ana Tskshvediani
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Nino Janelidze
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Nino Mitaishvili
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Christopher J Grim
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA ; University of Maryland Institute for Advanced Computer Sciences, University of Maryland College Park, MD, USA
| | | | - Arlene J Chen
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA
| | - Elisa Taviani
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA
| | - Tamar Eliashvili
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Marina Tediashvili
- George Eliava Institute of Bacteriophages, Microbiology and Virology Tbilisi, Georgia
| | - Chris A Whitehouse
- U.S. Army Medical Research Institute of Infectious Diseases Fort Detrick, MD, USA
| | - Rita R Colwell
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA ; University of Maryland Institute for Advanced Computer Sciences, University of Maryland College Park, MD, USA ; Bloomberg School of Public Health, Johns Hopkins University Baltimore, MD, USA ; CosmosID™ College Park, MD, USA
| | - Anwar Huq
- Maryland Pathogen Research Institute, University of Maryland College Park, MD, USA ; School of Public Health, Maryland Institute for Applied Environmental Health, University of Maryland College Park, MD, USA
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Pareek N, Ghosh S, Singh RP, Vivekanand V. Enhanced production of chitin deacetylase by Penicillium oxalicum SAE M-51 through response surface optimization of fermentation conditions. 3 Biotech 2014; 4:33-39. [PMID: 28324456 PMCID: PMC3909569 DOI: 10.1007/s13205-013-0118-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 01/15/2013] [Indexed: 12/03/2022] Open
Abstract
Optimization of the fermentation conditions for chitin deacetylase (CDA) production by Penicillium oxalicum SAEM-51 was undertaken in the present study using central composite design (CCD) under submerged condition. CDA is widely employed for bio-catalytic conversion of chitin to chitosan. Chitosan is a biopolymer with immense commercial potential in diverse industrial sectors, viz. pharmaceutics, food, agriculture, water treatment, etc. CDA production was significantly affected by all the variables studied, viz. pH, temperature, inoculum age and size. The optimal conditions that stimulating maximal CDA production were found to be: pH, 7.9; temperature, 28 °C; inoculum age, 90 h, and 11 % inoculum size. Under these optimized conditions, the actual maximal CDA production was 623.57 ± 8.2 Ul−1, which was in good agreement with the values predicted by the quadratic model (648.24 Ul−1), confirming the validity of the model. Optimization of fermentation conditions through CCD had resulted into 1.4-fold enhancement in CDA productivity (Qp = 4.3264 Ul−1 h−1). Results of these experiments indicated that response surface methodology was proved to be a promising method for optimization of CDA production.
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Affiliation(s)
- Nidhi Pareek
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India.
- Department of Chemistry, Umeå University, 90183, Umeå, Sweden.
| | - Sanjoy Ghosh
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India.
| | - R P Singh
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - V Vivekanand
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
- Protein Engineering and Proteomics Group, Department of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, 1430, Ås, Norway
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36
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Production and purification of a hyperthermostable chitinase from Brevibacillus formosus BISR-1 isolated from the Great Indian Desert soils. Extremophiles 2014; 18:451-62. [DOI: 10.1007/s00792-014-0630-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 01/07/2014] [Indexed: 10/25/2022]
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Optimization, purification and characterization of novel thermostable, haloalkaline, solvent stable protease from Bacillus halodurans CAS6 using marine shellfish wastes: a potential additive for detergent and antioxidant synthesis. Bioprocess Biosyst Eng 2012; 36:873-83. [PMID: 22983319 DOI: 10.1007/s00449-012-0820-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 08/28/2012] [Indexed: 10/27/2022]
Abstract
A protease producing marine bacterium, Bacillus halodurans CAS6 isolated from marine sediments, was found to produce higher enzyme by utilizing shrimp shell powder. Optimum culture conditions for protease production were 50 °C, pH 9.0, 30 % NaCl and 1 % shrimp shell powder (SSP) and the protease purified with a specific activity of 509.84 U/mg. The enzyme retained 100 % of its original activity even at 70 °C, pH 10.0 and 30 % NaCl for 1 h. The purified protease exhibited higher stability when treated with ionic, non-ionic (72-94 %) and commercial detergents (76-88 %), and organic solvents (88-126 %). Significant blood stain removal activity was found with the enzyme in washing experiments. The culture supernatant supplemented with 1 % SSP showed 93.67 ± 2.52 % scavenging activity and FT-IR analysis of the reaction mixture confirmed the presence of antioxidants such as cyclohexane and cyclic depsipeptide with aliphatic amino groups. These remarkable qualities found with this enzyme produced by Bacillus halodurans CAS6 could make this as an ideal candidate to develop the industrial process for bioconversion of marine wastes and antioxidant synthesis.
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Purification and characterization of a 56 kDa chitinase isozyme (PaChiB) from the stomach of the silver croaker, Pennahia argentatus. Biosci Biotechnol Biochem 2012; 76:971-9. [PMID: 22738969 DOI: 10.1271/bbb.110989] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A 56 kDa chitinase isozyme (PaChiB) was purified from the stomach of the silver croaker Pennahia argentatus. The optimum pH and pH stability of PaChiB were observed in an acidic pH range. When N-acetylchitooligosaccharides ((GlcNAc)n, n=2 -6) were used as substrates, PaChiB degraded (GlcNAc)4 -6 and produced (GlcNAc)2,3. It degraded (GlcNAc)5 to produce (GlcNAc)2 (23.2%) and (GlcNAc)3 (76.8%). The ability to degrade p-nitrophenyl N-acetylchitooligosaccharides (pNp-(GlcNAc)n, n=2 -4) fell in the following order: pNp-(GlcNAc)3≫ pNp-(GlcNAc)2 pNp-(GlcNAc)4. Based on these results, we concluded that PaChiB is an endo-type chitinolytic enzyme, and that it preferentially hydrolyzes the third glycosidic bond from the non-reducing end of (GlcNAc)n. Activity toward crystalline α- and β-chitin was activated at 124%-185% in the presence of 0.5 M NaCl. PaChiB exhibited markedly high substrate specificity toward crab-shell α-chitin.
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Purushotham P, Sarma PVSRN, Podile AR. Multiple chitinases of an endophytic Serratia proteamaculans 568 generate chitin oligomers. BIORESOURCE TECHNOLOGY 2012; 112:261-269. [PMID: 22406064 DOI: 10.1016/j.biortech.2012.02.062] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Revised: 02/10/2012] [Accepted: 02/13/2012] [Indexed: 05/31/2023]
Abstract
Serratia proteamaculans 568 genome revealed the presence of four family 18 chitinases (Sp ChiA, Sp ChiB, Sp ChiC, and Sp ChiD). Heterologous expression and characterization of Sp ChiA, Sp ChiB, and Sp ChiC showed that these enzymes were optimally active at pH 6.0-7.0, and 40°C. The three Sp chitinases displayed highest activity/binding to β-chitin and showed broad range of substrate specificities, and released dimer as major end product from oligomeric and polymeric substrates. Longer incubation was required for hydrolysis of trimer for the three Sp chitinases. The three Sp chitinases released up to tetramers from colloidal chitin substrate. Sp ChiA and Sp ChiB were processive chitinases, while Sp ChiC was a non-processive chitinase. Based on the known structures of ChiA and ChiB from S. marcescens, 3D models of Sp ChiA and Sp ChiB were generated.
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Affiliation(s)
- Pallinti Purushotham
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad-500 046, India
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40
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Itoi S, Kanomata Y, Uchida S, Kadokura K, Nishio T, Oku T, Sugita H. Effect of the C-terminal domain of Vibrio proteolyticus chitinase A on the chitinolytic activity in association with pH changes. Lett Appl Microbiol 2012; 54:441-6. [PMID: 22372468 DOI: 10.1111/j.1472-765x.2012.03228.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS To reveal the cause of the difference in activity of chitinase A from Vibrio proteolyticus and chitinase A from a strain of Vibrio carchariae (a junior synonym of Vibrio harveyi), we investigated the pH-dependent activity of full-length V. proteolyticus chitinase A and a truncated recombinant corresponding to the V. harveyi form of chitinase A. METHODS AND RESULTS After overexpression in Escherichia coli strain DH5α, the full-length and truncated recombinant chitinases were purified by ammonium sulphate precipitation and anion exchange column chromatography. Chitinase activity was measured at various pH values using α-crystal and colloidal chitins as the substrate. The pH-dependent patterns of the relative specific activities for α-crystal chitin differed between the full-length and truncated recombinant chitinases, whereas those for colloidal chitin were similar to each other. CONCLUSION The difference in the activity of V. proteolyticus chitinase A and V. harveyi chitinase A might be partly due to a change in the pH dependence of the chitinase activities against α-crystal chitin, resulting from C-terminal processing. SIGNIFICANCE AND IMPACT OF STUDY The present results are important findings for not only ecological studies on the genus Vibrio in association with survival strategies, but also phylogenetic studies.
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Affiliation(s)
- S Itoi
- Department of Marine Science and Resources, Nihon University, Fujisawa, Kanagawa, Japan.
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41
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Production and characterization of exopolysaccharides and antioxidant from Paenibacillus sp. TKU023. N Biotechnol 2011; 28:559-65. [DOI: 10.1016/j.nbt.2011.03.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 02/25/2011] [Accepted: 03/03/2011] [Indexed: 11/23/2022]
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Optimization of medium composition for enhanced chitin deacetylase production by mutant Penicillium oxalicum SAEM-51 using response surface methodology under submerged fermentation. Process Biochem 2011. [DOI: 10.1016/j.procbio.2011.05.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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44
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Hirano T, Aoki M, Kadokura K, Kumaki Y, Hakamata W, Oku T, Nishio T. Heterodisaccharide 4-O-(N-acetyl-β-D-glucosaminyl)-D-glucosamine is an effective chemotactic attractant for Vibrio bacteria that produce chitin oligosaccharide deacetylase. Lett Appl Microbiol 2011; 53:161-6. [PMID: 21575022 DOI: 10.1111/j.1472-765x.2011.03083.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS To investigate the attractant effect of 4-O-(N-acetyl-β-D-glucosaminyl)-D-glucosamine (GlcNAc-GlcN) in the chemotaxis of Vibrio bacteria that produce carbohydrate esterase (CE) family 4 chitin oligosaccharide deacetylase (COD), an enzyme that catalyzes the production of GlcNAc-GlcN from N,N'-diacetylchitobiose (GlcNAc)(2). METHODS AND RESULTS The chemotactic effect of disaccharides from chitin on several strains of Vibrio bacteria was investigated using an agar gel lane-migration method. The results demonstrated that GlcNAc-GlcN functions as an effective chemoattractant in the CE family 4 COD-producing vibrios, Vibrio parahaemolyticus and Vibrio alginolyticus. In contrast, this phenomenon was not observed in Vibrio nereis or Vibrio furnissii, which lack genes encoding this enzyme. From transmission electron microscope observation of V. parahaemolyticus cells following the chemotaxis assay, GlcNAc-GlcN appears to stimulate polar flagellum rotation. CONCLUSIONS GlcNAc-GlcN is a specific chemoattractant for the CE family 4 COD-producing vibrios, V. parahaemolyticus and V. alginolyticus. SIGNIFICANCE AND IMPACT OF THE STUDY It was clarified for the first time that GlcNAc-GlcN functions as a signalling molecule in the chemotaxis of Vibrio bacteria that have an ability to produce CE family 4 COD, which generate GlcNAc-GlcN from (GlcNAc)(2).
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Affiliation(s)
- T Hirano
- Department of Chemistry and Life Science, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan
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Suresh PV, Sachindra NM, Bhaskar N. Solid state fermentation production of chitin deacetylase by Colletotrichum lindemuthianum ATCC 56676 using different substrates. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2011; 48:349-56. [PMID: 23572758 PMCID: PMC3551169 DOI: 10.1007/s13197-011-0252-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 02/09/2010] [Accepted: 02/10/2010] [Indexed: 11/26/2022]
Abstract
Production of extracellular chitin deacetylase by Colletotrichum lindemuthianum ATCC 56676 under solid substrate fermentation was studied. The suitability of shrimp shell chitin waste (SSCW) and commercial wheat bran (CWB) was evaluated for maximal enzyme production. CWB medium (pH 6.4 ± 0.2) supplemented with chitosan favoured maximal chitin deacetylase yield of 460.4 ± 14.7 unit/g initial dry substrate (U/g IDS) at 96 h as compared to maximal yield of 392.0 ± 6.4 U/g IDS at 192 h in SSCW medium (pH 8.7 ± 0.2) at 25 °C incubation temperature and 60% (w/w) initial moisture content of medium. Along with chitin deacetylase, C. lindemuthianum ATCC 56676 produced maximum endo-chitinase (0.28 ± 0.03 U/g IDS at 144 h) and β-N-acetylhexosaminidase (0.79 ± 0.009 U/g IDS at 192 h) in CWB medium and 0.49 ± 0.05 U/g IDS of endo-chitinase at 264 h and 0.38 ± 0.04 U/g IDS of β-N-acetylhexosaminidase at 96 h of incubation in SSCW medium. SEM studies indicated the difference in the morphology of mycelia and hyphae of C. lindemuthianum ATCC 56676 when grown on different solid substrates. Production of chitin deacetylase by SSF is being reported for the first time.
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Affiliation(s)
- P. V. Suresh
- Department of Meat, Fish and Poultry Technology, Central Food Technological Research Institute, (Council of Scientific and Industrial Research), Mysrore, 570 020 India
| | - N. M. Sachindra
- Department of Meat, Fish and Poultry Technology, Central Food Technological Research Institute, (Council of Scientific and Industrial Research), Mysrore, 570 020 India
| | - N. Bhaskar
- Department of Meat, Fish and Poultry Technology, Central Food Technological Research Institute, (Council of Scientific and Industrial Research), Mysrore, 570 020 India
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Kuo YH, Liang TW, Liu KC, Hsu YW, Hsu HC, Wang SL. Isolation and identification of a novel antioxidant with antitumour activity from Serratia ureilytica using squid pen as fermentation substrate. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2011; 13:451-461. [PMID: 20922553 DOI: 10.1007/s10126-010-9316-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Accepted: 07/15/2010] [Indexed: 05/29/2023]
Abstract
The antioxidant activity of the culture supernatant of Serratia ureilytica TKU013 with squid pen as the sole carbon/nitrogen source was assessed by three methods, and the phenolic contents were assayed. The supernatant with the highest antioxidant activity was further purified by liquid-liquid partition, revealing the ethyl acetate extract exhibited the strongest antioxidant activity and the highest total phenolic content. Eight fractions were retrieved from silica gel column chromatography of this extract, designated F1-F8. F4 was found to possess the strong antioxidative activity and the highest total phenolic content and also exhibited strong cytotoxic activities against two different tumoural cell lines. A new compound (Serranticin) with antioxidant and antitumor activity was obtained from F4. The structure of Serranticin is analogous to that of siderophores (hexacoordinated catecholamine), which are iron chelators. As such, Serranticin has the potential for use as a deferration agent in various iron overload diseases.
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Affiliation(s)
- Yao-Haur Kuo
- Division of Herbal Medicines and Natural Products, National Research Institute of Chinese Medicine, Taipei, 112, Taiwan
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Onaga S, Chinen K, Ito S, Taira T. Highly thermostable chitinase from pineapple: Cloning, expression, and enzymatic properties. Process Biochem 2011. [DOI: 10.1016/j.procbio.2010.11.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pareek N, Vivekanand V, Dwivedi P, Singh RP. Penicillium oxalicum SAEM-51: a mutagenised strain for enhanced production of chitin deacetylase for bioconversion to chitosan. N Biotechnol 2011; 28:118-24. [DOI: 10.1016/j.nbt.2010.09.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2010] [Revised: 08/21/2010] [Accepted: 09/24/2010] [Indexed: 11/26/2022]
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Xia JL, Xiong J, Zhang RY, Liu KK, Huang B, Nie ZY. Production of Chitinase and its Optimization from a Novel Isolate Serratia marcescens XJ-01. Indian J Microbiol 2011; 51:301-6. [PMID: 22754007 DOI: 10.1007/s12088-011-0139-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Accepted: 06/04/2010] [Indexed: 11/24/2022] Open
Abstract
Production of chitinase from bacteria has distinct advantages over fungi, due to the formation of mycelia of fungi in the later phase of fermentation. A novel chitinase-producing bacterial strain XJ-01 was isolated from the Yulu fishing field of Changsha, Hunan province, China, by enrichment and spread-plate technique, sequentially. Physicochemical characterization and 16S rRNA sequencing revealed that strain XJ-01 belongs to Serratia marcescens. By optimizing the fermentation condition based on L(9)(3(4)) orthogonal experimental design, a maximal chitinase activity up to 15.36 U/ml was attained by that stain under the condition: 0.5% (NH(4))(2)SO(4) as the nitrogen source, 0.75% colloidal chitin as the carbon source, temperature of 32°C, time of 32 h and pH 8.0.
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Annamalai N, Veeramuthu Rajeswari M, Vijayalakshmi S, Balasubramanian T. Purification and characterization of chitinase from Alcaligenes faecalis AU02 by utilizing marine wastes and its antioxidant activity. ANN MICROBIOL 2011; 61:801-807. [PMID: 22131949 PMCID: PMC3213332 DOI: 10.1007/s13213-011-0198-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Accepted: 01/05/2011] [Indexed: 10/30/2022] Open
Abstract
Marine waste is an abundant renewable source for the recovery of several value added metabolites with potential industrial applications. This study describes the production of chitinase on marine waste, with the subsequent use of the same marine waste for the extraction of antioxidants. A chitinase-producing bacterium isolated from seafood effluent was identified as Alcaligenes faecalis AU02. Optimal chitinase production was obtained in culture conditions of 37°C for 72 h in 100 ml medium containing 1% shrimp and crab shell powder (1:1) (w/v), 0.1% K(2)HPO(4), and 0.05% MgSO(4)·7H(2)O. The molecular weight of chitinase was determined by SDS-PAGE to be 36 kDa. The optimum pH, temperature, pH stability, and thermal stability of chitinase were about 8, 37°C, 5-12, and 40-80°C, respectively. The antioxidant activity of A. faecalis AU02 culture supernatant was determined through scavenging ability on 1,1-diphenyl-2-picrylhydrazyl (DPPH) as 84%, and the antioxidant compound was characterized by TLC and its FT-IR spectrum. The present study proposed that marine wastes can be utilized to generate a high-value-added product and that pharmacological studies can extend its use to the field of medicine.
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