1
|
Curran TP, Marrone A, Davidson LM, Pokharel N, Frempong JF, Tolbatov I, Phillip ML, Gober CB, Yang H, Stewart J. Parallel arrangement of peptides appended to a rigid, bimetallic, constrained ring system. Pept Sci (Hoboken) 2022. [DOI: 10.1002/pep2.24286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Alessandro Marrone
- Dipartimento di Farmacia Università degli Studi “G. D'Annunzio” Chieti‐Pescara Chieti Italy
| | | | | | | | - Iogann Tolbatov
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB) Université de Bourgogne Franche‐Comté (UBFC) Dijon France
| | | | - Cosmic B. Gober
- Department of Chemistry Trinity College Hartford Connecticut USA
| | - Haoyu Yang
- Department of Chemistry Trinity College Hartford Connecticut USA
| | - Joanne Stewart
- Department of Chemistry Hope College Holland Michigan USA
| |
Collapse
|
2
|
Zong Z, Hao A, Xing P, Zhao Y. Chiral molecular nanosilicas. Chem Sci 2022; 13:4029-4040. [PMID: 35440995 PMCID: PMC8985511 DOI: 10.1039/d2sc00793b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 03/14/2022] [Indexed: 11/21/2022] Open
Abstract
Molecular nanoparticles including polyoxometalates, proteins, fullerenes and polyhedral oligosiloxane (POSS) are nanosized objects with atomic precision, among which POSS derivatives are the smallest nanosilicas. Incorporation of molecular nanoparticles into chiral aggregates either by chiral matrices or self-assembly allows for the transfer of supramolecular chirality, yet the construction of intrinsic chirality with atomic precision in discrete molecules remains a great challenge. In this work, we present a molecular folding strategy to construct giant POSS molecules with inherent chirality. Ferrocenyl diamino acids are conjugated by two or four POSS segments. Hydrogen bonding-driven folding of diamino acid arms into parallel β-sheets facilitates the chirality transfer from amino acids to ferrocene and POSS respectively, disregarding the flexible alkyl spacers. Single crystal X-ray structures, density functional theory (DFT) calculations, circular dichroism and vibrational circular dichroism spectroscopy clearly verify the preferential formation of one enantiomer containing chiral molecular nanosilicas. The chiral orientation and chiroptical properties of POSS show pronounced dependence on the substituents of α-amino acids, affording an alternative way to control the folding behavior and POSS chirality in addition to the absolute configuration of amino acids. Through the kinetic nanoprecipitation protocol, one-dimensional aggregation enables chirality transfer from the molecular scale to the micrometer scale, self-assembling into helices in accordance with the packing propensity of POSS in a crystal phase. This work, by illustrating the construction of chiral molecular nanosilicas, paves a new way to obtain discrete chiral molecular nanoparticles for potential chiroptical applications.
Collapse
Affiliation(s)
- Zhaohui Zong
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University Jinan 250100 People's Republic of China
| | - Aiyou Hao
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University Jinan 250100 People's Republic of China
| | - Pengyao Xing
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University Jinan 250100 People's Republic of China .,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Yanli Zhao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| |
Collapse
|
3
|
Maurya SK, Pathak SS, Panchakarla LS, Singh HB. Synthesis and Self‐Assembly of Amphiphilic Ferrocene‐Selenopeptide Conjugates. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | | | - Harkesh B. Singh
- Indian Institute of Technology Department of Chemistry Powai 400076 Bombay INDIA
| |
Collapse
|
4
|
Singh H, Chenna A, Gangwar U, Borah J, Goel G, Haridas V. Bispidine as a β-strand nucleator: from a β-arch to self-assembled cages and vesicles. Chem Sci 2021; 12:15757-15764. [PMID: 35003608 PMCID: PMC8654037 DOI: 10.1039/d1sc04860k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 10/25/2021] [Indexed: 12/23/2022] Open
Abstract
The development of synthetic scaffolds that nucleate well-folded secondary structures is highly challenging. Herein, we designed and synthesized a series of core-modified peptides (F1, F2, F3, and F4) that fold into β-strand structures. These bispidine-scaffolded peptides were studied by CD, IR, NMR, single crystal XRD, and Molecular Dynamics (MD) simulations to investigate their conformational preferences. Solid-state and solution studies revealed that bispidine is a versatile scaffold that could be placed either at the terminal or at the middle of the peptide strand for nucleating the β-strand structure. Scaffolds that nucleate an isolated β-strand conformation are rare. Bispidine placed at the C-terminus of the peptide chain could nucleate a β-strand conformation, while bispidine placed at the middle resulted in a β-arch conformation. This nucleation activity stems from the ability to restrict the psi torsion angle (ψ) through intramolecular C5 hydrogen bonding between the equatorial hydrogen(s) of bispidine and the carbonyl oxygen(s) of the amino acid close to the scaffold. Furthermore, the bispidine peptidomimetic with a super secondary structure, namely β-arch, assembled into single-hole submicron cages and spherical vesicles as evident from microscopic studies. The design logic defined here will be a significant strategy for the development of β-strand mimetics and super secondary structures.
Collapse
Affiliation(s)
- Hanuman Singh
- Department of Chemistry, Indian Institute of Technology Delhi Hauz Khas New Delhi-110016 India
| | - Akshay Chenna
- Department of Chemical Engineering, Indian Institute of Technology Delhi Hauz Khas New Delhi-110016 India
| | - Upanshu Gangwar
- Department of Chemistry, Indian Institute of Technology Delhi Hauz Khas New Delhi-110016 India
| | - Julie Borah
- Department of Chemical Engineering, Indian Institute of Technology Delhi Hauz Khas New Delhi-110016 India
| | - Gaurav Goel
- Department of Chemical Engineering, Indian Institute of Technology Delhi Hauz Khas New Delhi-110016 India
| | - V Haridas
- Department of Chemistry, Indian Institute of Technology Delhi Hauz Khas New Delhi-110016 India
| |
Collapse
|
5
|
Liu B, Hao A, Xing P. Water-Mediated Folding Behaviors and Chiroptical Inversion of Ferrocene-Conjugated Dipeptides. J Phys Chem Lett 2021; 12:6190-6196. [PMID: 34189923 DOI: 10.1021/acs.jpclett.1c01231] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The hydration effect on the folding behavior of oligopeptides is of vital importance both in the structure basis of biomolecules and in the rational design of peptide-based materials, which however has rarely been addressed. Here we present the hydration impact on the spontaneous folding of dipeptides conjugated by the ferrocene spacer. In organic phase, the ferrocene-glycine-phenylalanine dipeptide formed a parallel β-sheet structure and Herrick's conformation, which underwent conformational transformation encountering aqueous media, by significantly switching dipeptide arm angles around the ferrocene axis up to 72°. The conformational transformation behavior aroused inversion of the chiroptical activity. Solid X-ray structures, proton nuclear magnetic resonance, chiroptical spectroscopy, and the density functional theory calculation were employed to unveil the hydration effect in the secondary structure transition, in which the rearrangement of hydrogen bonds played the vital role. This work deepens the understanding of water functioning in the structure modulation of biomolecules and also provides an alternative protocol in designing novel chiroptical switches and adaptive peptide-based biomaterials.
Collapse
Affiliation(s)
- Bingyu Liu
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education and School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Aiyou Hao
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education and School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Pengyao Xing
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education and School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| |
Collapse
|
6
|
Meunier A, Singleton ML, Kauffmann B, Granier T, Lautrette G, Ferrand Y, Huc I. Aromatic foldamers as scaffolds for metal second coordination sphere design. Chem Sci 2020; 11:12178-12186. [PMID: 34094430 PMCID: PMC8162952 DOI: 10.1039/d0sc05143h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 10/11/2020] [Indexed: 11/21/2022] Open
Abstract
As metalloproteins exemplify, the chemical and physical properties of metal centers depend not only on their first but also on their second coordination sphere. Installing arrays of functional groups around the first coordination sphere of synthetic metal complexes is thus highly desirable, but it remains a challenging objective. Here we introduce a novel approach to produce tailored second coordination spheres. We used bioinspired artificial architectures based on aromatic oligoamide foldamers to construct a rigid, modular and well-defined environment around a metal complex. Specifically, aza-aromatic monomers having a tethered [2Fe-2S] cluster have been synthesized and incorporated in conical helical foldamer sequences. Exploiting the modularity and predictability of aromatic oligoamide structures allowed for the straightforward design of a conical architecture able to sequester the metal complex in a confined environment. Even though no direct metal complex-foldamer interactions were purposely designed in this first generation model, crystallography, NMR and IR spectroscopy concurred to show that the aromatic oligoamide backbone alters the structure and fluxional processes of the metal cluster.
Collapse
Affiliation(s)
- Antoine Meunier
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Michael L Singleton
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Brice Kauffmann
- Université de Bordeaux, CNRS, INSERM, Institut Européen de Chimie et Biologie (UMS 3033) 2 Rue Robert Escarpit 33600 Pessac France
| | - Thierry Granier
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Guillaume Lautrette
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Yann Ferrand
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
| | - Ivan Huc
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB 2 Rue Robert Escarpit 33600 Pessac France
- Department of Pharmacy, Centre for Integrated Protein Science, Ludwig-Maximilians-Universität Butenandtstraße 5-13 D-81377 Munich Germany
| |
Collapse
|
7
|
|
8
|
Hu B, Lian Z, Zhou Z, Shi L, Yu Z. Reactive Oxygen Species-Responsive Adaptable Self-Assembly of Peptides toward Advanced Biomaterials. ACS APPLIED BIO MATERIALS 2020; 3:5529-5551. [DOI: 10.1021/acsabm.0c00758] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Binbin Hu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University Weijin Road 94, Tianjin 300071, China
| | - Zhengwen Lian
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University Weijin Road 94, Tianjin 300071, China
| | - Zhifei Zhou
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University Weijin Road 94, Tianjin 300071, China
| | - Linqi Shi
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University Weijin Road 94, Tianjin 300071, China
| | - Zhilin Yu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University Weijin Road 94, Tianjin 300071, China
| |
Collapse
|
9
|
Liu YZ, Wang H, Chan CK, Mu X, Robeyns K, Wang CC, Singleton ML. Structure-Dependent Guest Recognition with Flexible Ferrocene-Based Aromatic Oligoamide β-Sheet Mimics. Chemistry 2020; 26:181-185. [PMID: 31691432 DOI: 10.1002/chem.201904719] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Indexed: 12/27/2022]
Abstract
A series of aromatic oligoamides incorporating an inherently flexible ferrocene dicarboxylic acid unit was synthesized. Solid state, solution, and computational studies on these systems indicated that the aromatic strands can adopt a syn parallel stacked conformation. This results in modular β-sheet-like molecular clefts that display structure-dependent recognition of small polar molecules. NMR and theoretical studies of the host-guest interaction support an in cleft binding mode and allowed the selectivity of the oligomers to be rationalized on the basis of minor changes in functional-group presentation on the edge of the aromatic strands.
Collapse
Affiliation(s)
- Ya-Zhou Liu
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1, Louvain-la-Neuve, 1348, Belgium
| | - Hu Wang
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1, Louvain-la-Neuve, 1348, Belgium
| | - Chieh-Kai Chan
- Institute of Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Xiao Mu
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1, Louvain-la-Neuve, 1348, Belgium
| | - Koen Robeyns
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1, Louvain-la-Neuve, 1348, Belgium
| | | | - Michael L Singleton
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1, Louvain-la-Neuve, 1348, Belgium
| |
Collapse
|
10
|
Zhai L, Wang S, Nara M, Takeuchi K, Shimada I, Otani Y, Ohwada T. Application of C-Terminal 7-Azabicyclo[2.2.1]heptane to Stabilize β-Strand-like Extended Conformation of a Neighboring α-Amino Acid. J Org Chem 2018; 83:13063-13079. [DOI: 10.1021/acs.joc.8b01756] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luhan Zhai
- Laboratory of Organic and Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Siyuan Wang
- Laboratory of Organic and Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masayuki Nara
- Department of Chemistry, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827, Japan
| | - Koh Takeuchi
- Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Ichio Shimada
- Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Aomi, Koto-ku, Tokyo 135-0064, Japan
- Laboratory of Physical Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuko Otani
- Laboratory of Organic and Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tomohiko Ohwada
- Laboratory of Organic and Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| |
Collapse
|
11
|
Falcone N, Kraatz HB. Supramolecular Assembly of Peptide and Metallopeptide Gelators and Their Stimuli-Responsive Properties in Biomedical Applications. Chemistry 2018; 24:14316-14328. [DOI: 10.1002/chem.201801247] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/17/2018] [Indexed: 01/24/2023]
Affiliation(s)
- Natashya Falcone
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; 200 College St M5S 3E5 Toronto Canada
- Department of Physical and Environmental Science; University of Toronto Scarborough; 1065 Military Trail M1C 1A4 Toronto Canada
| | - Heinz-Bernhard Kraatz
- Department of Chemical Engineering and Applied Chemistry; University of Toronto; 200 College St M5S 3E5 Toronto Canada
- Department of Physical and Environmental Science; University of Toronto Scarborough; 1065 Military Trail M1C 1A4 Toronto Canada
- Department of Chemistry; University of Toronto; 80 St. George St M5S 3H6 Toronto Canada
| |
Collapse
|
12
|
Chanawanno K, Holstrom C, Nemykin VN, Herrick RS, Ziegler CJ. New 1,1'-Ferrocene Bis(sulfonyl) Reagents. ChemistrySelect 2016; 1:6438-6441. [PMID: 29322090 DOI: 10.1002/slct.201601748] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Several new 1,1'-bis(sulfonyl)ferrocenes designed for the synthesis of sulfonamide linked biological conjugates have been prepared. 1,1'-Bis(sulfonylbromide)ferrocene can be produced from the corresponding sulfonylchloride via a bis(sulfonylhydrazide) intermediate. Bis(sulfonyl-N-hydroxybenzotriazole)ferrocene can also be synthesized from the sulfonyl chloride, and reaction of glycine methyl ester with the sulfonyl chloride affords a [3]ferrocenophane complex. All new compounds have been structurally characterized by X-ray crystallography.
Collapse
Affiliation(s)
- Kullapa Chanawanno
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200 (Thailand)
| | - Cole Holstrom
- Department of Chemistry & Biochemistry University of Minnesota - Duluth 1039 University Drive, Duluth, MN 55812 (USA)
| | - Victor N Nemykin
- Department of Chemistry & Biochemistry University of Minnesota - Duluth 1039 University Drive, Duluth, MN 55812 (USA).,Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Richard S Herrick
- Department of Chemistry, College of the Holy Cross, 1 College St, Worcester, MA 01610 (USA)
| | | |
Collapse
|
13
|
Chanawanno K, Holstrom C, Crandall LA, Dodge H, Nemykin VN, Herrick RS, Ziegler CJ. The synthesis and structures of 1,1'-bis(sulfonyl)ferrocene derivatives. Dalton Trans 2016; 45:14320-6. [PMID: 27539927 DOI: 10.1039/c6dt02669a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A series of 1,1'-bis(sulfonyl)ferrocene compounds were produced via the 1,1'-bis(sulfonate)ferrocene ammonium salt. This compound can be readily converted to 1,1' bis(sulfonylchloride)ferrocene. By varying stoichiometry and reaction times, both mono- and bis-sulfonamide derivatives can be synthesized. All new compounds presented in this report have been structurally characterized. The structures of the bis-sulfonamide systems are similar to the well-studied bis(amide) ferrocene compounds. Intermolecular hydrogen bonding is observed, typically between NH and SO groups of neighboring sulfonamides. However in the bis(GABA) derivative, intermolecular NH to CO hydrogen bonding interactions are present.
Collapse
Affiliation(s)
- Kullapa Chanawanno
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | | | | | | | | | | | | |
Collapse
|
14
|
Ghosh D, Lahiri P, Verma H, Mukherjee S, Chatterjee J. Engineering β-sheets employing N-methylated heterochiral amino acids. Chem Sci 2016; 7:5212-5218. [PMID: 29449932 PMCID: PMC5784515 DOI: 10.1039/c6sc00518g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/19/2016] [Indexed: 01/01/2023] Open
Abstract
There is a lack of functional group diversity in the reverse turn motifs nucleating a β-sheet conformation in designed peptides, proteins and foldamers. The majority of these sequences consist of d-Pro-l-Pro, d-Pro-Gly or Asn-Gly as the turn inducing motif restricting their biological application and physicochemical modulation. In this report, for the first time we elucidate that N-methylation of heterochiral amino acids in linear peptides nucleates β-sheet conformation without the necessity of having a ring or covalent constraint at the reverse turn. Our results show that d-Pro can be conveniently substituted by any other N-methylated d-amino acid followed by an N-methylated l-amino acid or sarcosine to adopt a βII' turn inducing the β-sheet folding. Furthermore, we reveal that a single amino acid either at the i + 1 or i + 2 site of the reverse turn can modulate the right-handed twist, which eventually dictates the extent of the foldedness of the β-hairpin.
Collapse
Affiliation(s)
- Dipan Ghosh
- Molecular Biophysics Unit , Indian Institute of Science , Bangalore 560012 , India .
| | - Priyanka Lahiri
- Molecular Biophysics Unit , Indian Institute of Science , Bangalore 560012 , India .
| | - Hitesh Verma
- Molecular Biophysics Unit , Indian Institute of Science , Bangalore 560012 , India .
| | - Somnath Mukherjee
- Molecular Biophysics Unit , Indian Institute of Science , Bangalore 560012 , India .
| | - Jayanta Chatterjee
- Molecular Biophysics Unit , Indian Institute of Science , Bangalore 560012 , India .
| |
Collapse
|
15
|
Kovačević M, Kodrin I, Cetina M, Kmetič I, Murati T, Semenčić MČ, Roca S, Barišić L. The conjugates of ferrocene-1,1'-diamine and amino acids. A novel synthetic approach and conformational analysis. Dalton Trans 2016; 44:16405-20. [PMID: 26308626 DOI: 10.1039/c5dt01610j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel synthetic approach toward a poorly explored bioorganometallic consisting of ferrocene-1,1'-diamine bearing structurally and chirally diverse amino acid sequences is reported. Until now, ferrocene-1,1'-diamine was suitable for accommodating only identical amino acid sequences at its N-termini, leading to the symmetrically disubstituted homochiral products stabilized through a 14-membered intramolecular hydrogen-bonded ring as is seen in antiparallel β-sheet peptides. The key step of the novel synthetic pathway is the transformation of Ac-Ala-NH-Fn-COOH (5) (Fn = 1,1'-ferrocenylene) to orthogonally protected Ac-Ala-NH-Fn-NHBoc (7). The spectroscopic analysis (IR, NMR, CD) of the novel compounds, corroborated with DFT studies, suggests the interesting feature of the ferrocene-1,1'-diamine scaffold. The same hydrogen-bonding pattern, i.e. a 14-membered hydrogen-bonded ring, was determined both in solution and in the solid state, thus making them promising, yet simple scaffolds capable of mimicking β-sheet peptides. In vitro screening of potential anticancer activity in Hep G2 human liver carcinoma cells and Hs 578 T human breast cancer cells revealed a cytotoxic pattern for novel compounds (150-500 μM) with significantly decreased cell proliferation.
Collapse
Affiliation(s)
- Monika Kovačević
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, Zagreb, Croatia.
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Srinivas P, Prabhakar S, Chevallier F, Nassar E, Erb W, Dorcet V, Jouikov V, Radha Krishna P, Mongin F. Synthesis of ferrocene amides and esters from aminoferrocene and 2-substituted ferrocenecarboxylic acid and properties thereof. NEW J CHEM 2016. [DOI: 10.1039/c6nj02018f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The X-ray diffraction structure of the ferrocene ester FcE-1 showed the presence of an intermolecular hydrogen bond between the amide functional groups.
Collapse
Affiliation(s)
- Palabindela Srinivas
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- Bâtiment 10A
| | - Sunchu Prabhakar
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- Bâtiment 10A
| | - Floris Chevallier
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- Bâtiment 10A
| | - Ekhlass Nassar
- Chemistry Department
- Faculty of Women for Arts
- Science and Education
- Ain Shams University
- 11566 Cairo
| | - William Erb
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- Bâtiment 10A
| | - Vincent Dorcet
- Centre de Diffractométrie X
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- Bâtiment 10B
| | - Viatcheslav Jouikov
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- Bâtiment 10A
| | - Palakodety Radha Krishna
- Organic & Biomolecular Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- D-211
- Discovery Laboratory
- Hyderabad-500007
| | - Florence Mongin
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- Bâtiment 10A
| |
Collapse
|
17
|
Pelay-Gimeno M, Glas A, Koch O, Grossmann TN. Structure-Based Design of Inhibitors of Protein-Protein Interactions: Mimicking Peptide Binding Epitopes. Angew Chem Int Ed Engl 2015; 54:8896-927. [PMID: 26119925 PMCID: PMC4557054 DOI: 10.1002/anie.201412070] [Citation(s) in RCA: 496] [Impact Index Per Article: 55.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Indexed: 12/15/2022]
Abstract
Protein-protein interactions (PPIs) are involved at all levels of cellular organization, thus making the development of PPI inhibitors extremely valuable. The identification of selective inhibitors is challenging because of the shallow and extended nature of PPI interfaces. Inhibitors can be obtained by mimicking peptide binding epitopes in their bioactive conformation. For this purpose, several strategies have been evolved to enable a projection of side chain functionalities in analogy to peptide secondary structures, thereby yielding molecules that are generally referred to as peptidomimetics. Herein, we introduce a new classification of peptidomimetics (classes A-D) that enables a clear assignment of available approaches. Based on this classification, the Review summarizes strategies that have been applied for the structure-based design of PPI inhibitors through stabilizing or mimicking turns, β-sheets, and helices.
Collapse
Affiliation(s)
- Marta Pelay-Gimeno
- Chemical Genomics Centre of the Max Planck SocietyOtto-Hahn-Strasse 15, 44227 Dortmund (Germany) E-mail:
| | - Adrian Glas
- Chemical Genomics Centre of the Max Planck SocietyOtto-Hahn-Strasse 15, 44227 Dortmund (Germany) E-mail:
| | - Oliver Koch
- TU Dortmund University, Department of Chemistry and Chemical BiologyOtto-Hahn-Strasse 6, 44227 Dortmund (Germany)
| | - Tom N Grossmann
- Chemical Genomics Centre of the Max Planck SocietyOtto-Hahn-Strasse 15, 44227 Dortmund (Germany) E-mail:
- TU Dortmund University, Department of Chemistry and Chemical BiologyOtto-Hahn-Strasse 6, 44227 Dortmund (Germany)
| |
Collapse
|
18
|
Adhikari B, Singh C, Shah A, Lough AJ, Kraatz H. Amino Acid Chirality and Ferrocene Conformation Guided Self‐Assembly and Gelation of Ferrocene–Peptide Conjugates. Chemistry 2015; 21:11560-72. [DOI: 10.1002/chem.201501395] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Bimalendu Adhikari
- Department of Physical and Environmental Sciences, University of Toronto, 1265 Military Trail, Toronto, M1C 1A4 (Canada)
| | - Charanpreet Singh
- Department of Physical and Environmental Sciences, University of Toronto, 1265 Military Trail, Toronto, M1C 1A4 (Canada)
| | - Afzal Shah
- Department of Physical and Environmental Sciences, University of Toronto, 1265 Military Trail, Toronto, M1C 1A4 (Canada)
- Present address: Department of Chemistry, Quaid‐i‐Azam University, 45320 (Pakistan)
| | - Alan J. Lough
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada)
| | - Heinz‐Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto, 1265 Military Trail, Toronto, M1C 1A4 (Canada)
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada)
| |
Collapse
|
19
|
Pelay-Gimeno M, Glas A, Koch O, Grossmann TN. Strukturbasierte Entwicklung von Protein-Protein-Interaktionsinhibitoren: Stabilisierung und Nachahmung von Peptidliganden. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412070] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
20
|
Alkynyl β-sheet peptidomimetics retain their anti-parallel sheet conformation when coordinated to tungsten. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.08.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
21
|
Adhikari B, Lough AJ, Barker B, Shah A, Xiang C, Kraatz HB. Bis-amino Acid Derivatives of 1,1′-Ferrocenedicarboxylic Acid: Structural, Electrochemical, and Metal Ion Binding Studies. Organometallics 2014. [DOI: 10.1021/om500032p] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Bimalendu Adhikari
- Department
of Physical and Environmental Sciences, University of Toronto, 1265 Military Trail, Toronto, M1C 1 A4 Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 Canada
| | - Alan J. Lough
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 Canada
| | - Bryan Barker
- Department
of Physical and Environmental Sciences, University of Toronto, 1265 Military Trail, Toronto, M1C 1 A4 Canada
| | - Afzal Shah
- Department
of Physical and Environmental Sciences, University of Toronto, 1265 Military Trail, Toronto, M1C 1 A4 Canada
- Department
of Chemistry, Quaid-i-Azam University, 45320 Islamabad, Pakistan
| | - Cuili Xiang
- Department
of Physical and Environmental Sciences, University of Toronto, 1265 Military Trail, Toronto, M1C 1 A4 Canada
| | - Heinz-Bernhard Kraatz
- Department
of Physical and Environmental Sciences, University of Toronto, 1265 Military Trail, Toronto, M1C 1 A4 Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 Canada
| |
Collapse
|
22
|
Lingard H, Han JT, Thompson AL, Leung IKH, Scott RTW, Thompson S, Hamilton AD. Diphenylacetylene-linked peptide strands induce bidirectional β-sheet formation. Angew Chem Int Ed Engl 2014; 53:3650-3. [PMID: 24554626 DOI: 10.1002/anie.201309353] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 12/17/2013] [Indexed: 12/31/2022]
Abstract
In the search for synthetic mimics of protein secondary structures relevant to the mediation of protein-protein interactions, we have synthesized a series of tetrasubstituted diphenylacetylenes that display β-sheet structures in two directions. Extensive X-ray crystallographic and NMR solution phase studies are consistent with these proteomimetics adopting sheet structures, displaying both hydrophobic and hydrophilic amino acid side chains.
Collapse
Affiliation(s)
- Hannah Lingard
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA (UK) http://hamilton.chem.ox.ac.uk
| | | | | | | | | | | | | |
Collapse
|
23
|
Lingard H, Han JT, Thompson AL, Leung IKH, Scott RTW, Thompson S, Hamilton AD. Diphenylacetylene-Linked Peptide Strands Induce Bidirectional β-Sheet Formation. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309353] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
24
|
Affiliation(s)
- Shohei Tashiro
- Department of Chemistry, Graduate School of Science, The University of Tokyo
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo
| |
Collapse
|
25
|
Beheshti S, Martić S, Kraatz HB. Hierarchical Organization of Ferrocene-Peptides. Chemistry 2012; 18:9099-105. [DOI: 10.1002/chem.201200666] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 04/24/2012] [Indexed: 01/09/2023]
|
26
|
|
27
|
Zhang S, Zhao Y. Flexible oligocholate foldamers as membrane transporters and their guest-dependent transport mechanism. Org Biomol Chem 2012; 10:260-6. [DOI: 10.1039/c1ob06364b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
28
|
Beheshti S, Lataifeh A, Kraatz HB. Hydrogen-bonding interactions in ferrocene-peptide conjugates containing valine. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.10.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
29
|
Beeren SR, Sanders JKM. Discovery of linear receptors for multiple dihydrogen phosphate ions using dynamic combinatorial chemistry. J Am Chem Soc 2011; 133:3804-7. [PMID: 21361379 DOI: 10.1021/ja200130h] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We describe the use of dynamic combinatorial chemistry to discover a new series of linear hydrazone-based receptors that bind multiple dihydrogen phosphate ions. Through the use of a template-driven, selection-based approach to receptor synthesis, dynamic combinatorial chemistry allows for the identification of unexpected host structures and binding motifs. Notably, we observed the unprecedented selection of these linear receptors in preference to competing macrocyclic hosts. Furthermore, linear receptors containing up to nine building blocks and three different building blocks were amplified in the dynamic combinatorial library. The receptors were formed using a dihydrazide building block based on an amino acid-disubstituted ferrocene scaffold. A detailed study of the linear pentamer revealed that it forms a helical ditopic receptor that employs four acylhydrazone hydrogen-bond donor motifs to cooperatively bind two dihydrogen phosphate ions.
Collapse
Affiliation(s)
- Sophie R Beeren
- University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | | |
Collapse
|
30
|
Cheng LY, Long YT, Tian H, Kraatz HB. Spectroscopic and Electrochemical Investigations into the Interactions of Metal Ions with a Ferrocenoyl-Histidine Peptide Conjugate. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000658] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
31
|
Cho H, Zhao Y. Environmental Effects Dominate the Folding of Oligocholates in Solution, Surfactant Micelles, and Lipid Membranes. J Am Chem Soc 2010; 132:9890-9. [DOI: 10.1021/ja103694p] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Hongkwan Cho
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| |
Collapse
|
32
|
Lataifeh A, Kraatz HB. Ferrocene–Aspartate Dendrimers: Conformational Analysis and Electrochemical Studies. J Inorg Organomet Polym Mater 2010. [DOI: 10.1007/s10904-010-9381-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
33
|
Ross NT, Katt WP, Hamilton AD. Synthetic mimetics of protein secondary structure domains. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2010; 368:989-1008. [PMID: 20123744 PMCID: PMC3263801 DOI: 10.1098/rsta.2009.0210] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Proteins modulate the majority of all biological functions and are primarily composed of highly organized secondary structural elements such as helices, turns and sheets. Many of these functions are affected by a small number of key protein-protein contacts, often involving one or more of these well-defined structural elements. Given the ubiquitous nature of these protein recognition domains, their mimicry by peptidic and non-peptidic scaffolds has become a major focus of contemporary research. This review examines several key advances in secondary structure mimicry over the past several years, particularly focusing upon scaffolds that show not only promising projection of functional groups, but also a proven effect in biological systems.
Collapse
|
34
|
Wei KJ, Ni J, Liu Y. Heterobimetallic metal-complex assemblies constructed from the flexible arm-like ligand 1,1'-bis[(3-pyridylamino)carbonyl]ferrocene: structural versatility in the solid state. Inorg Chem 2010; 49:1834-48. [PMID: 20095640 DOI: 10.1021/ic9021855] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The bidentate ferrocenyl sandwich molecule 1,1'-bis[(3-pyridylamino)carbonyl]ferrocene (3-BPFA) has been employed as an organometallic ligand in reactions with a series of transition metal salts to construct heterobimetallic architectures. X-ray crystallographic characterization reveals that the crystal packing of free ligand 3-BPFA induces spontaneous resolution of helical chains via intermolecular hydrogen bonds. By combining the flexibility from the arm-like molecule (3-BPFA) with the variation of the coordination property from different metal ions and/or the different counteranions, five different types of architectures are prepared: one octahedral coordination cage (copper(II) complex 1); two discrete pseudocapsules for combination of chlorine anions (nickel(II) complex 2 and cobalt(II) complex 3); two dimers with metal-metal interactions (silver(I) complexes 4 and 5); one macrocyclic complex (mercury(II) complex 6); and five two-dimensional mixed-metal-organic frameworks (M'-MOFs) (zinc(II), cadmium(II), and mercury(II) complexes 7-11). The structures of all complexes are characterized in detail by IR, elementary analysis, and single-crystal X-ray diffraction analysis. The factors inducing the structure variation among the complexes are discussed by taking account of the coordination geometry of different metal ions, the span angle between the two "arms", and the coordination mode of the 3-BPFA ligand.
Collapse
Affiliation(s)
- Kai-Ju Wei
- Department of Chemistry, University of Science & Technology of China, Hefei 230026, PR China.
| | | | | |
Collapse
|
35
|
George J, Thomas KG. Surface Plasmon Coupled Circular Dichroism of Au Nanoparticles on Peptide Nanotubes. J Am Chem Soc 2010; 132:2502-3. [DOI: 10.1021/ja908574j] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jino George
- Photosciences and Photonics Section, National Institute for Interdisciplinary Science and Technology, CSIR, Trivandrum, 695 019, India
| | - K. George Thomas
- Photosciences and Photonics Section, National Institute for Interdisciplinary Science and Technology, CSIR, Trivandrum, 695 019, India
| |
Collapse
|
36
|
Zhao Y. Spacer-Dependent Folding and Aggregation of Oligocholates in SDS Micelles. J Org Chem 2009; 74:7470-80. [DOI: 10.1021/jo901651h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| |
Collapse
|
37
|
|
38
|
Lataifeh A, Beheshti S, Kraatz H. Designer Peptides: Attempt to Control Peptide Structure by Exploiting Ferrocene as a Scaffold. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900268] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anas Lataifeh
- Department of Chemistry, University of Western Ontario, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada, Fax: +1‐519‐661‐3022
| | - Samaneh Beheshti
- Department of Chemistry, University of Western Ontario, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada, Fax: +1‐519‐661‐3022
| | - Heinz‐Bernhard Kraatz
- Department of Chemistry, University of Western Ontario, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada, Fax: +1‐519‐661‐3022
| |
Collapse
|
39
|
Moriuchi T, Fujiwara T, Hirao T. β-Turn-structure-assembled palladium complexes by complexation-induced self-organization of ferrocene–dipeptide conjugates. Dalton Trans 2009:4286-8. [DOI: 10.1039/b817652c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
40
|
Zhao Y. Conformation of Oligocholate Foldamers with 4-Aminobutyroyl Spacers. J Org Chem 2008; 74:834-43. [DOI: 10.1021/jo802201b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| |
Collapse
|