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Ámon J, Varga G, Pfeiffer I, Farkas Z, Karácsony Z, Hegedűs Z, Vágvölgyi C, Hamari Z. The role of the Aspergillus nidulans high mobility group B protein HmbA, the orthologue of Saccharomyces cerevisiae Nhp6p. Sci Rep 2022; 12:17334. [PMID: 36243791 PMCID: PMC9569327 DOI: 10.1038/s41598-022-22202-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 10/11/2022] [Indexed: 01/10/2023] Open
Abstract
The mammalian HMGB1 is a high-mobility-group B protein, which is both an architectural and functional element of chromatin. Nhp6p, the extensively studied fungal homologue of HMGB1 in Saccharomyces cerevisiae has pleiotropic physiological functions. Despite the existence of Nhp6p orthologues in filamentous ascomycetes, little is known about their physiological roles besides their contribution to sexual development. Here we study the function of HmbA, the Aspergillus nidulans orthologue of Nhp6p. We show that HmbA influences the utilization of various carbon- and nitrogen sources, stress tolerance, secondary metabolism, hyphae elongation and maintenance of polarized growth. Additionally, by conducting heterologous expression studies, we demonstrate that HmbA and Nhp6p are partially interchangeable. HmbA restores SNR6 transcription and fitness of nhp6AΔBΔ mutant and reverses its heat sensitivity. Nhp6Ap complements several phenotypes of hmbAΔ, including ascospore formation, utilization of various carbon- and nitrogen-sources, radial growth rate, hypha elongation by polarized growth. However, Nhp6Ap does not complement sterigmatocystin production in a hmbAΔ strain. Finally, we also show that HmbA is necessary for the normal expression of the endochitinase chiA, a cell wall re-modeller that is pivotal for the normal mode of maintenance of polar growth.
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Affiliation(s)
- Judit Ámon
- grid.9008.10000 0001 1016 9625Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Gabriella Varga
- grid.9008.10000 0001 1016 9625Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Ilona Pfeiffer
- grid.9008.10000 0001 1016 9625Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Zoltán Farkas
- grid.481814.00000 0004 0479 9817Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Eötvös Loránd Research Network, Szeged, Hungary
| | - Zoltán Karácsony
- grid.9008.10000 0001 1016 9625Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary ,grid.424679.aPresent Address: Food and Wine Research Institute, Eszterházy Károly University, Eger, Hungary
| | - Zsófia Hegedűs
- grid.9008.10000 0001 1016 9625Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Csaba Vágvölgyi
- grid.9008.10000 0001 1016 9625Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Zsuzsanna Hamari
- grid.9008.10000 0001 1016 9625Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
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Lázár V, Martins A, Spohn R, Daruka L, Grézal G, Fekete G, Számel M, Jangir PK, Kintses B, Csörgő B, Nyerges Á, Györkei Á, Kincses A, Dér A, Walter FR, Deli MA, Urbán E, Hegedűs Z, Olajos G, Méhi O, Bálint B, Nagy I, Martinek TA, Papp B, Pál C. Antibiotic-resistant bacteria show widespread collateral sensitivity to antimicrobial peptides. Nat Microbiol 2018; 3:718-731. [PMID: 29795541 DOI: 10.1038/s41564-018-0164-0] [Citation(s) in RCA: 231] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 04/17/2018] [Indexed: 01/28/2023]
Abstract
Antimicrobial peptides are promising alternative antimicrobial agents. However, little is known about whether resistance to small-molecule antibiotics leads to cross-resistance (decreased sensitivity) or collateral sensitivity (increased sensitivity) to antimicrobial peptides. We systematically addressed this question by studying the susceptibilities of a comprehensive set of 60 antibiotic-resistant Escherichia coli strains towards 24 antimicrobial peptides. Strikingly, antibiotic-resistant bacteria show a high frequency of collateral sensitivity to antimicrobial peptides, whereas cross-resistance is relatively rare. We identify clinically relevant multidrug-resistance mutations that increase bacterial sensitivity to antimicrobial peptides. Collateral sensitivity in multidrug-resistant bacteria arises partly through regulatory changes shaping the lipopolysaccharide composition of the bacterial outer membrane. These advances allow the identification of antimicrobial peptide-antibiotic combinations that enhance antibiotic activity against multidrug-resistant bacteria and slow down de novo evolution of resistance. In particular, when co-administered as an adjuvant, the antimicrobial peptide glycine-leucine-amide caused up to 30-fold decrease in the antibiotic resistance level of resistant bacteria. Our work provides guidelines for the development of efficient peptide-based therapies of antibiotic-resistant infections.
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Affiliation(s)
- Viktória Lázár
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary.,Faculty of Biology, Technion - Israel Institute of Technology, Haifa, Israel
| | - Ana Martins
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Réka Spohn
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Lejla Daruka
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Gábor Grézal
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Gergely Fekete
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Mónika Számel
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Pramod K Jangir
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Bálint Kintses
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Bálint Csörgő
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Ákos Nyerges
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Ádám Györkei
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - András Kincses
- Biomolecular Electronics Research Group, Bionanoscience Unit, Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - András Dér
- Biomolecular Electronics Research Group, Bionanoscience Unit, Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Fruzsina R Walter
- Biological Barriers Research Group, Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Mária A Deli
- Biological Barriers Research Group, Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Edit Urbán
- Institute of Clinical Microbiology, Albert Szent-Györgyi Medical and Pharmaceutical Center, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Zsófia Hegedűs
- Institute of Pharmaceutical Analysis, University of Szeged, Szeged, Hungary
| | - Gábor Olajos
- Institute of Pharmaceutical Analysis, University of Szeged, Szeged, Hungary
| | - Orsolya Méhi
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | | | - István Nagy
- SeqOmics Biotechnology Ltd, Mórahalom, Hungary.,Sequencing Platform, Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, Hungary
| | - Tamás A Martinek
- Institute of Pharmaceutical Analysis, University of Szeged, Szeged, Hungary
| | - Balázs Papp
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary.
| | - Csaba Pál
- Synthetic and Systems Biology Unit, Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary.
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Hetényi A, Hegedűs Z, Fajka-Boja R, Monostori É, Kövér KE, Martinek TA. Target-specific NMR detection of protein-ligand interactions with antibody-relayed 15N-group selective STD. J Biomol NMR 2016; 66:227-232. [PMID: 27885546 DOI: 10.1007/s10858-016-0076-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 11/07/2016] [Indexed: 06/06/2023]
Abstract
Fragment-based drug design has been successfully applied to challenging targets where the detection of the weak protein-ligand interactions is a key element. 1H saturation transfer difference (STD) NMR spectroscopy is a powerful technique for this work but it requires pure homogeneous proteins as targets. Monoclonal antibody (mAb)-relayed 15N-GS STD spectroscopy has been developed to resolve the problem of protein mixtures and impure proteins. A 15N-labelled target-specific mAb is selectively irradiated and the saturation is relayed through the target to the ligand. Tests on the anti-Gal-1 mAb/Gal-1/lactose system showed that the approach is experimentally feasible in a reasonable time frame. This method allows detection and identification of binding molecules directly from a protein mixture in a multicomponent system.
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Affiliation(s)
- Anasztázia Hetényi
- Department of Medical Chemistry, University of Szeged, Dóm t. 8., Szeged, 6720, Hungary
| | - Zsófia Hegedűs
- SZTE-MTA Lendület Foldamer Research Group, Institute of Pharmaceutical Analysis Department, University of Szeged, Somogyi u. 4, Szeged, 6720, Hungary
| | - Roberta Fajka-Boja
- Lymphocyte Signal Transduction Laboratory, Institute of Genetics, Biological Research Center of the Hungarian Academy of Sciences, Temesvári krt. 62, Szeged, 6726, Hungary
| | - Éva Monostori
- Lymphocyte Signal Transduction Laboratory, Institute of Genetics, Biological Research Center of the Hungarian Academy of Sciences, Temesvári krt. 62, Szeged, 6726, Hungary
| | - Katalin E Kövér
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1., Debrecen, 4032, Hungary
| | - Tamás A Martinek
- SZTE-MTA Lendület Foldamer Research Group, Institute of Pharmaceutical Analysis Department, University of Szeged, Somogyi u. 4, Szeged, 6720, Hungary.
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