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Rezvani V, Pourianfar HR, Mohammadnejad S, Madjid Ansari A, Farahmand L. Anticancer potentiality and mode of action of low-carbohydrate proteins and peptides from mushrooms. Appl Microbiol Biotechnol 2020; 104:6855-6871. [PMID: 32556413 DOI: 10.1007/s00253-020-10707-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/20/2020] [Accepted: 05/31/2020] [Indexed: 02/07/2023]
Abstract
Severe side effects of chemotherapy as well as drug resistance highlight the ongoing need to discover novel natural bioactive compounds with anticancer potentiality. Mushroom-derived proteins are among the naturally occurring compounds that have been the subject of a body of research on their potentiality in cancer therapy. The greatest attention in relevant review articles has been paid to well-known mushroom-derived glycoproteins such as lectins and protein-bound polysaccharide complexes such as polysaccharide-K (PSK) or krestin and polysaccharopeptide (PSP), which contain substantial amounts of carbohydrates (50-90%). These complex compounds exert their anticancer activity mainly by binding to cell membranes leading to extrinsic (death receptor) apoptosis or intrinsic (mitochondrial) apoptotic pathways. However, several other research studies have reported pure, well-characterized, proteins or peptides from mushrooms, which are carbohydrate-free or have very low amounts of carbohydrate. These proteins may fall into four categories including fungal immunomodulatory proteins, ubiquitin-like proteins, enzymes, and unclassified proteins. Well-defined chemical structure, elucidated full amino acid or N-terminal sequences, purity, and having some distinct and specific pathways compared to glycoproteins have made these low-carbohydrate proteins attractive for cancer research. The aim of this review was therefore to improve the current understanding of mushroom-derived low-carbohydrate proteins and to consolidate the existing knowledge of the most promising mushroom species from which low-carbohydrate proteins have been derived, characterized, and examined for their anticancer activity. In addition, molecular targets and mechanisms of action of these proteins have been discussed. Key points • Mushroom-derived low-carbohydrate proteins lack or have low carbohydrate. • Low-carbohydrate proteins show potent anticancer activities in vitro and in vivo. • There are specific pathways for low-carbohydrate proteins to inhibit cancer cells.
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Affiliation(s)
- Vala Rezvani
- Industrial Fungi Biotechnology Research Department, Research Institute for Industrial Biotechnology, Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, P.O. Box 91775-1376, Mashhad, Iran
| | - Hamid R Pourianfar
- Industrial Fungi Biotechnology Research Department, Research Institute for Industrial Biotechnology, Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, P.O. Box 91775-1376, Mashhad, Iran.
| | - Safoora Mohammadnejad
- Industrial Fungi Biotechnology Research Department, Research Institute for Industrial Biotechnology, Academic Center for Education, Culture and Research (ACECR), Khorasan Razavi Branch, P.O. Box 91775-1376, Mashhad, Iran
| | - Alireza Madjid Ansari
- Integrative Oncology Department, Breast Cancer Research Center, Moatamed Cancer Institute, ACECR, Tehran, Iran
| | - Leila Farahmand
- Recombinant Proteins Department, Breast Cancer Research Center, Moatamed Cancer Institute, ACECR, Tehran, Iran.
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Dan X, Liu W, Wong JH, Ng TB. A Ribonuclease Isolated from Wild Ganoderma Lucidum Suppressed Autophagy and Triggered Apoptosis in Colorectal Cancer Cells. Front Pharmacol 2016; 7:217. [PMID: 27504094 PMCID: PMC4958627 DOI: 10.3389/fphar.2016.00217] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 07/05/2016] [Indexed: 11/13/2022] Open
Abstract
The mushroom Ganoderma lucidum (G. lucidum) has been consumed in China as a medicine for promoting health and longevity for thousands of years. Due to its paramount and multiple pharmaceutical effects, G. lucidum has received considerable attention from researchers and its chemical constituents as well as their respective functions were gradually unveiled by using modern research methods. Herein, we reported the isolation of a protein (Ganoderma lucidum ribonuclease, GLR) with anti-colorectal cancer activities from G. lucidum. This protein is a 17.4-kDa RNA degrading enzyme (ribonuclease) and was purified by using liquid chromatography procedures. GLR manifested potent anti-proliferative and anti-colony formation activities on HT29 and HCT116 colorectal cancer cells by inducing cell cycle arrest in G1 phase through the regulation of cyclin D1 and P53 expression. GLR was demonstrated to induce cell apoptosis in HCT116 cells by activating unfolded protein response and caspase-9 regulated pathways. Besides, the ability to undergo autophagy which is a stress adaption mechanism to cope with metabolic crisis was significantly suppressed by GLR treatment in HCT116 cells. The activation of apoptosis in GLR-treated HT29 cells was, however, independent of caspase-9 and the suppression of autophagy was also relatively minor. Thus the apoptosis of HT29 cells triggered by GLR was much milder than that in HCT116 cells. Our findings show that the RNase from G. lucidum may be one of the bioactive components that contribute to the anti-colorectal cancer activity of G. lucidum.
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Affiliation(s)
- Xiuli Dan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong Hong Kong, China
| | - Wenlong Liu
- Shenzhen Key Laboratory of Marine Biomedical Materials, Shenzhen Institutes of Advanced Technology, The Chinese Academy of Sciences Shenzhen, China
| | - Jack H Wong
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong Hong Kong, China
| | - Tzi B Ng
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong Hong Kong, China
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Zhang R, Tian G, Zhao Y, Zhao L, Wang H, Gong Z, Ng TB. A novel ribonuclease with HIV-1 reverse transcriptase inhibitory activity purified from the fungusRamaria formosa. J Basic Microbiol 2014; 55:269-75. [DOI: 10.1002/jobm.201300876] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2013] [Accepted: 01/13/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Rui Zhang
- State Key Laboratory for Agrobiotechnology and Department of Microbiology; China Agricultural University; Beijing China
| | - Guoting Tian
- Institute of Biotechnology and Germplasmic Resource; Yunnan Academy of Agricultural Science; Kunming China
| | - Yongchang Zhao
- Institute of Biotechnology and Germplasmic Resource; Yunnan Academy of Agricultural Science; Kunming China
| | - Liyan Zhao
- College of Food Science and Technology; Nanjing Agricultural University; Weigang Nanjing China
| | - Hexiang Wang
- State Key Laboratory for Agrobiotechnology and Department of Microbiology; China Agricultural University; Beijing China
| | - Zhiyuan Gong
- Institute of Agricultural Resources and Environment; Shandong Academy of Agricultural Sciences; Jinan Shandong China
| | - Tzi Bun Ng
- Faculty of Medicine; School of Biomedical Sciences; The Chinese University of Hong Kong; Shatin New Territories Hong Kong China
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ZHANG RUI, ZHAO LIYAN, WANG HEXIANG, NG TZIBUN. A novel ribonuclease with antiproliferative activity toward leukemia and lymphoma cells and HIV-1 reverse transcriptase inhibitory activity from the mushroom, Hohenbuehelia serotina. Int J Mol Med 2013; 33:209-14. [DOI: 10.3892/ijmm.2013.1553] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 10/30/2013] [Indexed: 11/06/2022] Open
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Xiao C, Feng S, Wang H, Gong Z, Ng T. Purification and characterization of a ribonuclease with antiproliferative activity from the mystical wild mushroom Tuber indicum. J Basic Microbiol 2013; 54 Suppl 1:S102-8. [PMID: 23787947 DOI: 10.1002/jobm.201300018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Accepted: 05/09/2013] [Indexed: 11/09/2022]
Abstract
An RNase with a molecular mass of 28 kDa and with high ribonucleolytic activity toward poly(A) was purified from the ascocarps of Tuber indicum. The purification procedure involved ion exchange chromatography on diethylaminoethyl cellulose, Q-Sepharose and Mono Q, and gel filtration by fast protein liquid chromatography on Superdex 75. The pH and temperature optima of the RNase were 7.2 and 50 °C, respectively. The ranking of its activity toward various polyhomoribonucleotides was poly(A)>poly(C)>poly(G) ≈ poly(U). All of the metal ions used in this study, except for the K(+) ions, curtailed the activity of the RNase. The RNase activity was reduced by ethylene diamine tetraacetic acid (EDTA), dithiothreitol (DTT), and sodium dodecyl sulfate (SDS) by 42.2%, 75.5%, and 96.6%, respectively. The RNase inhibited the proliferation of hepatoma (HepG2) and human breast cancer cell lines (MCF7), with half-maximal inhibitory concentrations (IC50 ) of 12.6 and 16.6 μM, respectively.
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Affiliation(s)
- Chen Xiao
- State Key Laboratory for Agrobiotechnology and Department of Microbiology, China Agricultural University, Beijing, China
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Sekete M, Ma D, Wang B, Wang H, Ng T. First biochemical characterization of a novel ribonuclease from wild mushroom Amanita hemibapha. SPRINGERPLUS 2012; 1:79. [PMID: 23419979 PMCID: PMC3568466 DOI: 10.1186/2193-1801-1-79] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Accepted: 12/04/2012] [Indexed: 12/05/2022]
Abstract
A 45-kDa ribonuclease (RNase) was purified from dried fruiting bodies of the wild mushroom Amanita hemibapha. It was adsorbed on DEAE-cellulose, S-sepharose, and finally purified on Superdex 75. The RNase exhibited maximal RNase activity at pH 5 and in a temperature range between 60-70°C. It demonstrated no ribonucleolytic activity toward four polyhomoribonucleotides. The amino acid sequence analysis (GDDETFWEHEWAK) showed this RNase was a ribonuclease T2-like RNase. It exhibited strong inhibitory activity against HIV-1 reverse transcriptase (HIV-1 RT) with an IC50 of 17 μM.
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Zhou XW, Cong WR, Su KQ, Zhang YM. Ligninolytic enzymes fromGanodermaspp: Current status and potential applications. Crit Rev Microbiol 2012; 39:416-26. [DOI: 10.3109/1040841x.2012.722606] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Purification and characterization of a novel RNase with antiproliferative activity from the mushroom Lactarius flavidulus. J Antibiot (Tokyo) 2011; 65:67-72. [DOI: 10.1038/ja.2011.112] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhao YC, Zhang GQ, Ng TB, Wang HX. A novel ribonuclease with potent HIV-1 reverse transcriptase inhibitory activity from cultured mushroom Schizophyllum commune. J Microbiol 2011; 49:803-8. [PMID: 22068498 DOI: 10.1007/s12275-011-1098-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Accepted: 04/25/2011] [Indexed: 01/02/2023]
Abstract
A 20-kDa ribonuclease (RNase) was purified from fresh fruiting bodies of cultured Schizophyllum commune mushrooms. The RNase was not adsorbed on Affi-gel blue gel but adsorbed on DEAE-cellulose and CM-cellulose. It exhibited maximal RNase activity at pH 6.0 and 70°C. It demonstrated the highest ribonucleolytic activity toward poly (U) (379.5 μ/mg), the second highest activity toward poly (C) (244.7 μ/mg), less activity toward poly (A) (167.4 μ/mg), and much weaker activity toward poly (G) (114.5 μ/mg). The RNase inhibited HIV-1 reverse transcriptase with an IC(50) of 65 μM. No effect on [(3)H-methyl]-thymidine uptake by lymphoma MBL2 cells and leukemia L1210 cells was observed at 100 μM concentration of the RNase. A comparison of RNases from S. commune and Volvariella volvacea revealed that they demonstrated some similarities in N-terminal amino acid sequence, optimum pH and polyhomoribonucleotide specificity. However, some differences in chromatographic behavior and molecular mass were observed.
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Affiliation(s)
- Yong-Chang Zhao
- Institute of Biotechnology and Germplasmic Resource, Yunnan Academy of Agricultural Science, Kunming, 650223, P. R. China
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Fang EF, Ng TB. Ribonucleases of different origins with a wide spectrum of medicinal applications. Biochim Biophys Acta Rev Cancer 2010; 1815:65-74. [PMID: 20843477 DOI: 10.1016/j.bbcan.2010.09.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2010] [Revised: 09/03/2010] [Accepted: 09/03/2010] [Indexed: 12/18/2022]
Abstract
Ribonucleases (RNases) are a type of nucleases that catalyze the degradation of RNA into smaller components. They exist in a wide range of life forms from prokaryotes to eukaryotes. RNase-controlled RNA degradation is a determining factor in the control of gene expression, maturation and turnover, which are further associated with the progression of cancers and infectious diseases. Over the years, RNases purified from multiple origins have drawn increasing attention from medical scientists due to their remarkable antitumor properties. In this review, we present a brief summary of the representative RNases of fungal, bacterial, plant, and animal origins and outline their potential medicinal value in the treatment of tumor and AIDS. Among them, the most clinically promising RNases are mushroom RNases, Binase and Barnase from bacteria, ginseng RNases, and Onconase from frog (Rana pipiens). Fast developing protein engineering of RNases, which display more potent cytotoxic activity on and greater selectivity for malignant cells, has also aroused the interest of researchers. The multiple anti-cancer mechanisms of RNases are also included. To sum up, these inspiring studies unveil a new perspective for RNases as potential therapeutic agents.
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Affiliation(s)
- Evandro Fei Fang
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
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Fang EF, Wong JH, Lin P, Ng TB. Biochemical characterization of the RNA-hydrolytic activity of a pumpkin 2S albumin. FEBS Lett 2010; 584:4089-96. [DOI: 10.1016/j.febslet.2010.08.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 08/27/2010] [Accepted: 08/27/2010] [Indexed: 02/04/2023]
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12
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Zhang RY, Zhang GQ, Hu DD, Wang HX, Ng TB. A Novel Ribonuclease with Antiproliferative Activity from Fresh Fruiting Bodies of the Edible Mushroom Lyophyllum shimeiji. Biochem Genet 2010; 48:658-68. [DOI: 10.1007/s10528-010-9347-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Accepted: 02/24/2010] [Indexed: 11/30/2022]
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13
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Guan G, Wang H, Ng T. A novel ribonuclease with antiproliferative activity from fresh fruiting bodies of the edible mushroom Hypsizigus marmoreus. Biochim Biophys Acta Gen Subj 2007; 1770:1593-7. [DOI: 10.1016/j.bbagen.2007.07.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2007] [Revised: 07/27/2007] [Accepted: 07/30/2007] [Indexed: 10/22/2022]
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Boh B, Berovic M, Zhang J, Zhi-Bin L. Ganoderma lucidum and its pharmaceutically active compounds. BIOTECHNOLOGY ANNUAL REVIEW 2007; 13:265-301. [PMID: 17875480 DOI: 10.1016/s1387-2656(07)13010-6] [Citation(s) in RCA: 314] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Ganoderma lucidum is a wood-degrading basidiomycete with numerous pharmacological effects. Since the mushroom is very rare in nature, artificial cultivation of fruiting bodies has been known on wood logs and on sawdust in plastic bags or bottles. Biotechnological cultivation of G. lucidum mycelia in bioreactors has also been established, both on solid substrates and in liquid media by submerged cultivation of fungal biomass. The most important pharmacologically active constituents of G. lucidum are triterpenoids and polysaccharides. Triterpenoids have been reported to possess hepatoprotective, anti-hypertensive, hypocholesterolemic and anti-histaminic effects, anti-tumor and anti-engiogenic activity, effects on platelet aggregation and complement inhibition. Polysaccharides, especially beta-d-glucans, have been known to possess anti-tumor effects through immunomodulation and anti-angiogenesis. In addition, polysaccharides have a protective effect against free radicals and reduce cell damage caused by mutagens.
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Affiliation(s)
- Bojana Boh
- Faculty of Natural Sciences and Engineering, University of Ljubljana, Vegova 4, 1000 Ljubljana, Slovenia
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Wang HX, Ng TB. A laccase from the medicinal mushroom Ganoderma lucidum. Appl Microbiol Biotechnol 2006; 72:508-13. [PMID: 16636832 DOI: 10.1007/s00253-006-0314-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2005] [Revised: 12/23/2005] [Accepted: 12/29/2005] [Indexed: 11/24/2022]
Abstract
A protein demonstrating laccase activity and potent inhibitory activity towards human immunodeficiency virus (HIV)-1 reverse transcriptase (IC50 1.2 microM) was isolated from fresh fruiting bodies of the medicinal mushroom Ganoderma lucidum. The laccase had a novel N-terminal sequence and a molecular mass of 75 kDa, which is higher than the range (55-56 kDa) reported for most other mushroom laccases. It was isolated by sequential chromatography on DEAE-cellulose and Affi-gel blue gel and adsorption on Con A-Sepharose. Unlike some of the previously isolated laccases, it was adsorbed only on Con A-Sepharose. The enzyme required a pH of 3-5 and a temperature of 70 degrees C to exhibit maximal activity. Minimal activity was detected at pH 6 and 7. Activity was undetectable at pH 8 and 9 and after exposure to 100 degrees C for 10 min.
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Affiliation(s)
- H X Wang
- State Key Laboratory for Agrobiotechnology and Department of Microbiology, China Agricultural University, Beijing 100094, China
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Wang HX, Ng TB. A novel ribonuclease from fresh fruiting bodies of the portabella mushroom Agaricus bisporus. Biochem Cell Biol 2006; 84:178-83. [PMID: 16609698 DOI: 10.1139/o06-033] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 14 kDa ribonuclease with a novel N-terminal sequence was isolated from fresh fruiting bodies of the portabella mushroom. It was adsorbed on DEAE-cellulose and carboxymethyl-cellulose, and demonstrated the highest ribonucleolytic potency toward poly (A), 60% as much activity toward poly (C), 40% as much activity toward poly (U), and the least activity (7% as much) toward poly (G). It exhibited a pH optimum at pH 4.5 and a temperature optimum at 60 °C. Its activity at 100 °C was higher than that at 20 °C.Key words: ribonuclease, portabella mushroom, isolation.
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Affiliation(s)
- H X Wang
- Department of Microbiology, China Agricultural University, Beijing and State Key Laboratory for Agrobiotechnology, China
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Wang H, Ng TB. Ganodermin, an antifungal protein from fruiting bodies of the medicinal mushroom Ganoderma lucidum. Peptides 2006; 27:27-30. [PMID: 16039755 DOI: 10.1016/j.peptides.2005.06.009] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2005] [Revised: 06/10/2005] [Accepted: 06/10/2005] [Indexed: 10/25/2022]
Abstract
A 15-kDa antifungal protein, designated ganodermin, was isolated from the medical mushroom Ganoderma lucidum. The isolation procedure utilized chromatography on DEAE-cellulose, Affi-gel blue gel, CM-Sepharose and Superdex 75. Ganodermin was unadsorbed on DEAE-cellulose and adsorbed on Affi-gel blue gel and CM-Sepharose. Ganodermin inhibited the mycelial growth of Botrytis cinerea, Fusarium oxysporum and Physalospora piricola with an IC50 value of 15.2 microM, 12.4 microM and 18.1 microM, respectively. It was devoid of hemagglutinating, deoxyribonuclease, ribonuclease and protease inhibitory activities.
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Affiliation(s)
- Hexiang Wang
- Department of Microbiology, College of Biological Science, China Agricultural University, Beijing, China
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Wang HX, Ng TB. Purification of a novel ribonuclease from dried fruiting bodies of the edible wild mushroom Thelephora ganbajun. Biochem Biophys Res Commun 2004; 324:855-9. [PMID: 15474506 DOI: 10.1016/j.bbrc.2004.09.132] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2004] [Indexed: 11/29/2022]
Abstract
A ribonuclease, with a molecular mass of 30 kDa and a potent inhibitory activity toward HIV-1 reverse transcriptase (IC50=300 nM), was isolated from dried fruiting bodies of the edible wild mushroom Thelephora ganbajun. The ribonuclease exhibited a unique polyhomoribonucleotide specificity, with the highest activity toward poly(U), about 50% and 25% as much activity toward poly(A) and poly(C), respectively, and minimal activity toward poly(G). Unlike other mushroom RNases, the ribonuclease was adsorbed on DEAE-cellulose and Q-Sepharose, and unadsorbed on CM-cellulose. A temperature of 40 degrees C and a pH of 6-7 were required for maximal activity of the enzyme. The enzyme was characterized by an N-terminal sequence without any homology to known proteins.
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Affiliation(s)
- H X Wang
- Department of Microbiology, China Agricultural University, Beijing and State Key Laboratory for Agrobiotechnology, Beijing, China.
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Abstract
The peptides and proteins secreted by fungi are reviewed in this article. They include ribosome inactivating peptides and proteins, antifungal peptides and proteins, lectins, ubiquitin-like peptides and proteins, peptides and proteins with nucleolytic activity, proteases, xylanases, cellulases, sugar oxidoreductases, laccases, invertases, trehalose phosphorylases, and various enzymes with applications in food industry, chemical production and the medical sector.
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Affiliation(s)
- T B Ng
- Department of Biochemistry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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Wang H, Ng TB. Isolation of a new ribonuclease from fruiting bodies of the silver plate mushroom Clitocybe maxima. Peptides 2004; 25:935-9. [PMID: 15203239 DOI: 10.1016/j.peptides.2004.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2003] [Revised: 03/16/2004] [Accepted: 03/17/2004] [Indexed: 10/26/2022]
Abstract
A ribonuclease, with an N-terminal sequence exhibiting some homology to ribonuclease from Pleurotus ostreatus (Family Pleurotaceae), has been purified from fruiting bodies of the silver plate mushroom Clitocybe maxima (Family Tricholomataceae). However, there is little resemblance between the N-terminal sequences of ribonucleases from various Pleurotus species, and a lesser extent of resemblance between ribonucleases from C. maxima and Pleurotus tuber-regium. No structural relationship exists between ribonuclease from C. maxima, and those from Volvariella volvacea, Lentinus edodes and Irpex lacteus. The purification protocol involved ion exchange chromatography on DEAE-cellulose, affinity chromatography on Affi-gel blue gel, ion exchange chromatography on CM-Sepharose, and fast protein liquid chromatography on Superdex 75. The ribonuclease was unadsorbed on DEAE-cellulose and adsorbed on Affi-gel blue gel and CM-Sepharose. It exhibited a molecular mass of 17.5 kDa in both gel filtration and sodium dodecyl sulfate-polyacrylamide gel electrophoresis. It manifested roughly the same ribonucleolytic potency toward poly A and poly G followed by poly U. Its activity toward poly C was, by comparison, meager. The temperature and pH required for its optimal activity were, respectively, 70 degrees C and 6.5-7.0.
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Affiliation(s)
- Hexiang Wang
- Department of Biochemistry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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