@article{MTMT:2868602,
	title = {Induced Folding of Protein-Sized Foldameric β-Sandwich Models with Core β-Amino Acid Residues},
	url = {https://m2.mtmt.hu/api/publication/2868602},
	author = {Olajos, Gábor and Hetényi, Anasztázia and Wéber, Edit and Németh, Lukács and Szakonyi, Zsolt and Fülöp, Ferenc and Martinek, Tamás},
	doi = {10.1002/chem.201405581},
	journal-iso = {CHEM-EUR J},
	journal = {CHEMISTRY-A EUROPEAN JOURNAL},
	volume = {21},
	unique-id = {2868602},
	issn = {0947-6539},
	abstract = {The mimicry of protein-sized β-sheet structures with unnatural peptidic sequences (foldamers) is a considerable challenge. In this work, the de novo designed betabellin-14 β-sheet has been used as a template, and α→β residue mutations were carried out in the hydrophobic core (positions 12 and 19). β-Residues with diverse structural properties were utilized: Homologous β3-amino acids, (1R,2S)-2-aminocyclopentanecarboxylic acid (ACPC), (1R,2S)-2-aminocyclohexanecarboxylic acid (ACHC), (1R,2S)-2-aminocyclohex-3-enecarboxylic acid (ACEC), and (1S,2S,3R,5S)-2-amino-6,6-dimethylbicyclo[3.1.1]heptane-3-carboxylic acid (ABHC). Six α/β-peptidic chains were constructed in both monomeric and disulfide-linked dimeric forms. Structural studies based on circular dichroism spectroscopy, the analysis of NMR chemical shifts, and molecular dynamics simulations revealed that dimerization induced β-sheet formation in the 64-residue foldameric systems. Core replacement with (1R,2S)-ACHC was found to be unique among the β-amino acid building blocks studied because it was simultaneously able to maintain the interstrand hydrogen-bonding network and to fit sterically into the hydrophobic interior of the β-sandwich. The novel β-sandwich model containing 25% unnatural building blocks afforded protein-like thermal denaturation behavior. Dissolving sandwiches: A water-soluble β-sandwich has been constructed by using cyclic β-amino acids in the hydrophobic core (see figure). The structural stability is highly dependent on the side-chain, and the destructuring effects of the β-residues could be minimized by using (1R,2S)-2-aminocyclohexanecarboxylic acid. The β-sandwich displays protein-like thermal denaturation behavior.},
	keywords = {PROTEINS; STABILITY; Protein Folding; Chemical bonds; amino acids; PEPTIDOMIMETICS; DICHROISM; molecular dynamics; chemical analysis; DYES; Hydrophobicity; Hydrogen bonds; molecular dynamics simulations; CHAINS; circular dichroism spectroscopy; Structural stabilities; Protein Engineering; Thermal denaturations; Hydrogen bonding network; NMR chemical shifts; PROTEIN STRUCTURES},
	year = {2015},
	eissn = {1521-3765},
	pages = {6173-6180},
	orcid-numbers = {Olajos, Gábor/0000-0002-2479-4891; Hetényi, Anasztázia/0000-0001-8080-6992; Wéber, Edit/0000-0002-5904-0619; Szakonyi, Zsolt/0000-0003-2432-8409; Fülöp, Ferenc/0000-0003-1066-5287; Martinek, Tamás/0000-0003-3168-8066}
}

@article{MTMT:2817673,
	title = {Peptides containing β-amino acid patterns: Challenges and successes in medicinal chemistry},
	url = {https://m2.mtmt.hu/api/publication/2817673},
	author = {Cabrele, C and Martinek, Tamás and Reiser, O and Berlicki, Ł},
	doi = {10.1021/jm5010896},
	journal-iso = {J MED CHEM},
	journal = {JOURNAL OF MEDICINAL CHEMISTRY},
	volume = {57},
	unique-id = {2817673},
	issn = {0022-2623},
	abstract = {The construction of bioactive peptides using β-amino acid-containing sequence patterns is a very promising strategy to obtain analogues that exhibit properties of high interest for medicinal chemistry applications. β-Amino acids have been shown to modulate the conformation, dynamics, and proteolytic susceptibility of native peptides. They can be either combined with α-amino acids by following specific patterns, which results in backbone architectures with well-defined orientations of the side chain functional groups, or assembled in de novo-designed bioactive β- or α,β-peptidic sequences. Such peptides display various biological functions, including antimicrobial activity, inhibition of protein-protein interactions, agonism/antagonism of GPCR ligands, and anti-angiogenic activity.},
	year = {2014},
	eissn = {1520-4804},
	pages = {9718-9739},
	orcid-numbers = {Martinek, Tamás/0000-0003-3168-8066}
}

@article{MTMT:2730808,
	title = {Continuous-Flow Solid-Phase Peptide Synthesis: A Revolutionary Reduction of the Amino Acid Excess},
	url = {https://m2.mtmt.hu/api/publication/2730808},
	author = {Mándity, István and Olasz, Balázs and Ötvös, Sándor Balázs and Fülöp, Ferenc},
	doi = {10.1002/cssc.201402436},
	journal-iso = {CHEMSUSCHEM},
	journal = {CHEMSUSCHEM},
	volume = {7},
	unique-id = {2730808},
	issn = {1864-5631},
	year = {2014},
	eissn = {1864-564X},
	pages = {3172-3176},
	orcid-numbers = {Mándity, István/0000-0003-2865-6143; Olasz, Balázs/0000-0003-4132-0054; Ötvös, Sándor Balázs/0000-0001-6673-1744; Fülöp, Ferenc/0000-0003-1066-5287}
}

@article{MTMT:2459240,
	title = {Foldameric α/β-Peptide Analogs of the β-Sheet-Forming Antiangiogenic Anginex: Structure and Bioactivity},
	url = {https://m2.mtmt.hu/api/publication/2459240},
	author = {Hegedüs, Zsófia and Wéber, Edit and Kriston-Pál, Éva and Makra, Ildikó and Czibula, Ágnes and Monostori, Éva and Martinek, Tamás},
	doi = {10.1021/ja408054f},
	journal-iso = {J AM CHEM SOC},
	journal = {JOURNAL OF THE AMERICAN CHEMICAL SOCIETY},
	volume = {135},
	unique-id = {2459240},
	issn = {0002-7863},
	abstract = {The principles of beta-sheet folding and design for alpha-peptidic sequences are well established, while those for sheet mimetics containing homologated amino acid building blocks are still under investigation. To reveal the structure-function relations of beta-amino-acid-containing foldamers, we followed a top-down approach to study a series of alpha/beta-peptidic analogs of anginex, a beta-sheet-forming antiangiogenic peptide. Eight anginex analogs were developed by systematic alpha --> beta(3) substitutions and analyzed by using NMR and CD spectroscopy. The foldamers retained the beta-sheet tendency, though with a decreased folding propensity. beta-Sheet formation could be induced by a micellar environment, similarly to that of the parent peptide. The destructuring effect was higher when the alpha --> beta(3) exchange was located in the beta-sheet core. Analysis of the beta-sheet stability versus substitution pattern and the local conformational bias of the bulky beta(3)V and beta(3)I residues revealed that a mismatch between the H-bonding preferences of the alpha- and beta-residues played a minor role in the structure-breaking effect. Temperature-dependent CD and NMR measurements showed that the hydrophobic stabilization was scaled-down for the alpha/beta-peptides. Analysis of the biological activity of the foldamer peptides showed that four anginex derivatives dose-dependently inhibited the proliferation of a mouse endothelial cell line. The alpha --> beta(3) substitution strategy applied in this work can be a useful approach to the construction of bioactive beta-sheet mimetics with a reduced aggregation tendency and improved pharmacokinetic properties.},
	year = {2013},
	eissn = {1520-5126},
	pages = {16578-16584},
	orcid-numbers = {Hegedüs, Zsófia/0000-0002-5546-8167; Wéber, Edit/0000-0002-5904-0619; Czibula, Ágnes/0000-0003-4461-2773; Monostori, Éva/0000-0002-7442-3562; Martinek, Tamás/0000-0003-3168-8066}
}

@article{MTMT:2750,
	title = {ANALYSIS OF THE CIRCULAR-DICHROISM SPECTRUM OF PROTEINS USING THE CONVEX CONSTRAINT ALGORITHM - A PRACTICAL GUIDE},
	url = {https://m2.mtmt.hu/api/publication/2750},
	author = {Perczel, András and Park, K and Fasman, GD},
	doi = {10.1016/0003-2697(92)90046-A},
	journal-iso = {ANAL BIOCHEM},
	journal = {ANALYTICAL BIOCHEMISTRY},
	volume = {203},
	unique-id = {2750},
	issn = {0003-2697},
	year = {1992},
	eissn = {1096-0309},
	pages = {83-93},
	orcid-numbers = {Perczel, András/0000-0003-1252-6416}
}