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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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2
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Averill AM, Rehman HT, Charles JW, Dinh TA, Danyal K, Verschraegen CF, Stein GS, Dostmann WR, Ramsey JE. Inhibition of the chimeric DnaJ-PKAc enzyme by endogenous inhibitor proteins. J Cell Biochem 2019; 120:13783-13791. [PMID: 30938854 DOI: 10.1002/jcb.28651] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 01/16/2019] [Indexed: 12/22/2022]
Abstract
The chimeric DnaJ-PKAc enzymeresulting from an approximately 400-kb deletion of chromosome 19 is a primary contributor to the oncogenic transformation that occurs in fibrolamellar hepatocellular carcinoma, also called fibrolamellar carcinoma (FLC). This oncogenic deletion juxtaposes exon 1 of the DNAJB1 heat shock protein gene with exon 2 of the PRKACA gene encoding the protein kinase A catalytic subunit, resulting in DnaJ-PKAc fusion under the transcriptional control of the DNAJB1 promoter. The expression of DnaJ-PKAc is approximately 10 times that of wild-type (wt) PKAc catalytic subunits, causing elevated and dysregulated kinase activity that contributes to oncogenic transformation. In normal cells, PKAc activity is regulated by a group of endogenous proteins, termed protein kinase inhibitors (PKI) that competitively inhibit PKAc and assist with the nuclear export of the enzyme. Currently, it is scarcely known whether interactions with PKI are perturbed in DnaJ-PKAc. In this report, we survey existing data sets to assess the expression levels of the various PKI isoforms that exist in humans to identify those that are candidates to encounter DnaJ-PKAc in both normal liver and FLC tumors. We then compare inhibition profiles of wtPKAc and DnaJ-PKAc against PKI and demonstrate that extensive structural homology in the active site clefts of the two enzymes confers similar kinase activities and inhibition by full-length PKI and PKI-derived peptides.
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Affiliation(s)
- April M Averill
- Department of Microbiology and Molecular Genetics, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Hibba Tul Rehman
- Division of Hematology and Oncology, Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont.,University of Vermont Cancer Center, Burlington, Vermont
| | - Joseph W Charles
- Department of Pharmacology, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Timothy A Dinh
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York.,Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Karamatullah Danyal
- Department of Pathology, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Claire F Verschraegen
- Division of Medical Oncology, The Ohio State Comprehensive Cancer Center, Columbus, Ohio
| | - Gary S Stein
- University of Vermont Cancer Center, Burlington, Vermont.,Department of Biochemistry,, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Wolfgang R Dostmann
- Department of Pharmacology, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Jon E Ramsey
- University of Vermont Cancer Center, Burlington, Vermont.,Department of Biochemistry,, Larner College of Medicine, University of Vermont, Burlington, Vermont
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Li S, Lu J, Lai W. Mechanistic insights into ring cleavage of hydroquinone by PnpCD from quantum mechanical/molecular mechanical calculations. Org Biomol Chem 2019; 17:8194-8205. [DOI: 10.1039/c9ob01084j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
QM/MM calculations for ring cleavage of hydroquinone by PnpCD show that Asn258 loses coordination to the iron when the reaction begins. The first-sphere Glu262 can act as an acid–base catalyst to lower the rate-limiting barrier.
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Affiliation(s)
- Senzhi Li
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Jiarui Lu
- Department of Chemistry
- Renmin University of China
- Beijing
- China
| | - Wenzhen Lai
- Department of Chemistry
- Renmin University of China
- Beijing
- China
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Schumacher J, Bacic T, Staritzbichler R, Daneschdar M, Klamp T, Arnold P, Jägle S, Türeci Ö, Markl J, Sahin U. Enhanced stability of a chimeric hepatitis B core antigen virus-like-particle (HBcAg-VLP) by a C-terminal linker-hexahistidine-peptide. J Nanobiotechnology 2018; 16:39. [PMID: 29653575 PMCID: PMC5897928 DOI: 10.1186/s12951-018-0363-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 03/21/2018] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Virus-like-particles (VLPs) are attractive nanoparticulate scaffolds for broad applications in material/biological sciences and medicine. Prior their functionalization, specific adaptations have to be carried out. These adjustments frequently lead to disordered particles, but the particle integrity is an essential factor for the VLP suitability. Therefore, major requirements for particle stabilization exist. The objective of this study was to evaluate novel stabilizing elements for functionalized chimeric hepatitis B virus core antigen virus-like particles (HBcAg-VLP), with beneficial characteristics for vaccine development, imaging or delivery. RESULTS The effects of a carboxy-terminal polyhistidine-peptide and an intradimer disulfide-bridge on the stability of preclinically approved chimeric HBcAg-VLPs were assessed. We purified recombinant chimeric HBcAg-VLPs bearing different modified C-termini and compared their physical and chemical particle stability by quantitative protein-biochemical and biophysical techniques. We observed lower chemical resistance of T = 3- compared to T = 4-VLP (triangulation number) capsids and profound impairment of accessibility of hexahistidine-peptides in assembled VLPs. Histidines attached to the C-terminus were associated with superior mechanical and/or chemical particle stability depending on the number of histidine moieties. A molecular modeling approach based on cryo-electron microscopy and biolayer interferometry revealed the underlying structural mechanism for the strengthening of the integrity of VLPs. Interactions triggering capsid stabilization occur on a highly conserved residue on the basis of HBcAg-monomers as well as on hexahistidine-peptides of adjacent monomers. This new stabilization mechanism appears to mimic an evolutionary conserved stabilization concept for hepadnavirus core proteins. CONCLUSIONS These findings establish the genetically simply transferable C-terminal polyhistidine-peptide as a general stabilizing element for chimeric HBcAg-VLPs to increase their suitability.
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Affiliation(s)
- Jens Schumacher
- Biopharmaceutical New Technologies (BioNTech) Protein Therapeutics Corporation, An der Goldgrube 12, 55131, Mainz, Germany.,Department of Internal Medicine III, Translational and Experimental Oncology, University Medical Center of Johannes Gutenberg University, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Tijana Bacic
- Biopharmaceutical New Technologies (BioNTech) Protein Therapeutics Corporation, An der Goldgrube 12, 55131, Mainz, Germany.,Department of Internal Medicine III, Translational and Experimental Oncology, University Medical Center of Johannes Gutenberg University, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - René Staritzbichler
- TRON Translational Oncology, University Medical Center of Johannes Gutenberg University, TRON gGmbH, Freiligrathstrasse 12, 55131, Mainz, Germany
| | - Matin Daneschdar
- Department of Internal Medicine III, Translational and Experimental Oncology, University Medical Center of Johannes Gutenberg University, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Thorsten Klamp
- Biopharmaceutical New Technologies (BioNTech) Protein Therapeutics Corporation, An der Goldgrube 12, 55131, Mainz, Germany.,Department of Internal Medicine III, Translational and Experimental Oncology, University Medical Center of Johannes Gutenberg University, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Philipp Arnold
- Institute of Zoology, Johannes Gutenberg University, Johannes-von-Müller-Weg 6, 55128, Mainz, Germany.,Anatomical Institute, Otto-Hahn Platz 8, 24118, Kiel, Germany
| | - Sabrina Jägle
- Biopharmaceutical New Technologies (BioNTech) Protein Therapeutics Corporation, An der Goldgrube 12, 55131, Mainz, Germany.,Department of Internal Medicine III, Translational and Experimental Oncology, University Medical Center of Johannes Gutenberg University, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Özlem Türeci
- Ganymed Pharmaceuticals AG, An der Goldgrube 12, 55131, Mainz, Germany
| | - Jürgen Markl
- Institute of Zoology, Johannes Gutenberg University, Johannes-von-Müller-Weg 6, 55128, Mainz, Germany
| | - Ugur Sahin
- Biopharmaceutical New Technologies (BioNTech) Protein Therapeutics Corporation, An der Goldgrube 12, 55131, Mainz, Germany. .,Department of Internal Medicine III, Translational and Experimental Oncology, University Medical Center of Johannes Gutenberg University, Langenbeckstrasse 1, 55131, Mainz, Germany. .,TRON Translational Oncology, University Medical Center of Johannes Gutenberg University, TRON gGmbH, Freiligrathstrasse 12, 55131, Mainz, Germany.
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Thakur AK, Larimi MG, Gooden K, Movileanu L. Aberrantly Large Single-Channel Conductance of Polyhistidine Arm-Containing Protein Nanopores. Biochemistry 2017; 56:4895-4905. [PMID: 28812882 DOI: 10.1021/acs.biochem.7b00577] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
There have been only a few studies reporting on the impact of polyhistidine affinity tags on the structure, function, and dynamics of proteins. Because of the relatively short size of the tags, they are often thought to have little or no effect on the conformation or activity of a protein. Here, using membrane protein design and single-molecule electrophysiology, we determined that the presence of a hexahistidine arm at the N-terminus of a truncated FhuA-based protein nanopore, leaving the C-terminus untagged, produces an unusual increase in the unitary conductance to ∼8 nS in 1 M KCl. To the best of our knowledge, this is the largest single-channel conductance ever recorded with a monomeric β-barrel outer membrane protein. The hexahistidine arm was captured by an anti-polyhistidine tag monoclonal antibody added to the side of the channel-forming protein addition, but not to the opposite side, documenting that this truncated FhuA-based protein nanopore inserts into a planar lipid bilayer with a preferred orientation. This finding is in agreement with the protein insertion in vivo, in which the large loops face the extracellular side of the membrane. The aberrantly large single-channel conductance, likely induced by a greater cross-sectional area of the pore lumen, along with the vectorial insertion into a lipid membrane, will have profound implications for further developments of engineered protein nanopores.
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Affiliation(s)
- Avinash Kumar Thakur
- Department of Physics, Syracuse University , 201 Physics Building, Syracuse, New York 13244-1130, United States.,Structural Biology, Biochemistry, and Biophysics Program, Syracuse University , 111 College Place, Syracuse, New York 13244-4100, United States
| | - Motahareh Ghahari Larimi
- Department of Physics, Syracuse University , 201 Physics Building, Syracuse, New York 13244-1130, United States
| | - Kristin Gooden
- Department of Physics and Astronomy, University of Missouri , 223 Physics Building, Columbia, Missouri 65211-7010, United States
| | - Liviu Movileanu
- Department of Physics, Syracuse University , 201 Physics Building, Syracuse, New York 13244-1130, United States.,Structural Biology, Biochemistry, and Biophysics Program, Syracuse University , 111 College Place, Syracuse, New York 13244-4100, United States.,Department of Biomedical and Chemical Engineering, Syracuse University , 329 Link Hall, Syracuse, New York 13244, United States
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Kosobokova EN, Skrypnik KA, Kosorukov VS. Overview of Fusion Tags for Recombinant Proteins. BIOCHEMISTRY (MOSCOW) 2017; 81:187-200. [PMID: 27262188 DOI: 10.1134/s0006297916030019] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Virtually all recombinant proteins are now prepared using fusion domains also known as "tags". The use of tags helps to solve some serious problems: to simplify procedures of protein isolation, to increase expression and solubility of the desired protein, to simplify protein refolding and increase its efficiency, and to prevent proteolysis. In this review, advantages and disadvantages of such fusion tags are analyzed and data on both well-known and new tags are generalized. The authors own data are also presented.
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Affiliation(s)
- E N Kosobokova
- Blokhin Russian Cancer Research Center, Moscow, 115478, Russia.
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Biochemical and structural characterization of a novel ubiquitin-conjugating enzyme E2 from Agrocybe aegeria reveals Ube2w family-specific properties. Sci Rep 2015; 5:16056. [PMID: 26525192 PMCID: PMC4630614 DOI: 10.1038/srep16056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 10/01/2015] [Indexed: 11/08/2022] Open
Abstract
Ubiquitination is a post-translational modification that is involved in myriad cellar regulation and disease pathways. The ubiquitin-conjugating enzyme (E2) is an important player in the ubiquitin transfer pathway. Although many E2 structures are available, not all E2 families have known structures, and three-dimensional structures from fungal organisms other than yeast are lacking. We report here the crystal structure of UbcA1, which is a novel ubiquitin-conjugating enzyme identified from the edible and medicinal mushroom Agrocybe aegerita and displays potential antitumor properties. The protein belongs to the Ube2w family and shows similar biochemical characteristics to human Ube2w, including monomer-dimer equilibrium in solution, α-NH2 ubiquitin-transfer activity and a mechanism to recognize backbone atoms of intrinsically disordered N-termini in substrates. Its structure displays a unique C-terminal conformation with an orientation of helix α3 that is completely different from the reported E2 structures but similar to a recently reported NMR ensemble of Ube2w. A mutagenesis study on this novel enzyme revealed that an intact C-terminus is significant for protein dimerization and enzymatic activity. As the first crystallized full-length protein of this family, UbcA1 may supersede the truncated X-ray structure of Ube2w (PDB entry 2A7L) as the representative structure of the Ube2w family.
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