Article
Chemistry, Multidisciplinary
Giovanni Pierri, Rosaria Schettini, Francesco F. Summa, Francesco De Riccardis, Guglielmo Monaco, Irene Izzo, Consiglia Tedesco
Summary: Enantiomorphic right- and left-handed polyproline type I helices have been observed for the first time in four cyclic dodecapeptoids with methoxyethyl and propargyl side chains using single crystal X-ray diffraction. The absence of NH hydrogen bonds in peptoids reveals the role of intramolecular backbone-to-backbone interactions and CH hydrogen bonds in stabilizing the macrocycle conformation. Additionally, intramolecular backbone-side chain C5 CH hydrogen bonds emerge as a stabilizing factor.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Pei-Yin Lee, Abhilash Sahoo, Silvina Matysiak
Summary: Transmembrane helix folding and self-association are important processes in biological signaling and transportation across biomembranes. This study uses molecular simulations to investigate the folding and dimerization of Glycophorin A (GpA) and its mutants in the presence of Dodecyl-phosphocholine (DPC) micelles. The results reveal independent folding and dimerization events for transmembrane helices and identify specific features responsible for the structural stability of GpA. This work provides a comprehensive understanding of the structural stability of GpA in a micellar environment and demonstrates the potential of computationally efficient models for studying conformational alterations of transmembrane proteins with physiological relevance.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Naohiro Kameta, Wuxiao Ding, Mitsutoshi Masuda
Summary: Encapsulation and preorganization of diacetylene monomers in glycolipid nanotubes enable the production of polydiacetylene nanotubes with hydrophilic/hydrophobic surfaces and left/right-handed helicities.
CHEMICAL COMMUNICATIONS
(2021)
Review
Biochemistry & Molecular Biology
Ryan Brady, Nicola J. Harris, Grant A. Pellowe, Samuel Gulaidi Breen, Paula J. Booth
Summary: Membrane proteins need to fold precisely in the lipid membrane to function correctly, with the energy contributions from lipids affecting the insertion and folding processes. Altering lipid composition can influence the probability of successful folding and insertion of transmembrane helices.
BIOCHEMICAL SOCIETY TRANSACTIONS
(2022)
Article
Multidisciplinary Sciences
Shunji Suetaka, Yoshiki Oka, Tomoko Kunihara, Yuuki Hayashi, Munehito Arai
Summary: The researchers have developed an inhibitor to disrupt the interaction between c-Myb and KIX by stabilizing the helical structure of c-Myb using theoretical predictions and mutation design. These findings suggest that designing helical peptide inhibitors, particularly through conservative amino acid substitutions, is a simple and effective strategy for developing antitumor drugs.
SCIENTIFIC REPORTS
(2022)
Article
Biochemistry & Molecular Biology
Jessica Guillerm, Jean-Marie Frere, Filip Meersman, Andre Matagne
Summary: The study focused on a tandem-repeat protein and showed that it can fold in a highly cooperative manner.
Article
Biochemistry & Molecular Biology
Raja Banerjee, Tridip Sheet, Srijan Banerjee, Barbara Biondi, Fernando Formaggio, Claudio Toniolo, Cristina Peggion
Summary: In synthetic peptides, incorporating a large number of L-Ala residues and noncoded Aib units enhances their helical extent, but the achiral nature of Aib poses challenges in analyzing their helical conformations. By replacing Aib with L-AMV, it is found that the L-AMV-containing peptide exhibits a significantly stronger preference for alpha-helical character compared to its Aib parent. L-AMV, as a chiral amino acid, shows an intrinsic bias for a specific (right-handed) screw sense, emphasizing its relevance for designing right-handed alpha-helical peptide models.
Article
Chemistry, Inorganic & Nuclear
Y. Liu, W. Li, Y-Q Yang, M-S Chen, W-W Fu
Summary: Two novel compounds, [Zn(bitmb)(L)]•2H2O and [Co(bitmb)(L)]•2H2O, were successfully synthesized and characterized under hydrothermal conditions. Both complexes exhibit isostructural 3-fold right-handed helical 1D chains and have been studied for their IR and PXRD spectra, TG curves, and photoluminescent properties.
JOURNAL OF STRUCTURAL CHEMISTRY
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Qiang Sun, Yong-Ling Ban
Summary: This paper presents a miniaturized E-plane substrate integrate waveguide (SIW) Butler matrix based on the coexistence mode composite right/left-handed (Co-mode CRLH) technology. By introducing interdigital slot (IDS) and adjusting the size to control transmission characteristics, the miniaturized design of the E-plane BM is achieved, reducing its size by 22.1% compared to traditional methods.
2021 IEEE MTT-S INTERNATIONAL WIRELESS SYMPOSIUM (IWS 2021)
(2021)
Article
Chemistry, Physical
Young Kee Kang, Hae Sook Park
CHEMICAL PHYSICS LETTERS
(2018)
Article
Chemistry, Physical
Young Kee Kang, Hae Sook Park
CHEMICAL PHYSICS LETTERS
(2018)
Article
Chemistry, Multidisciplinary
Julie Aguesseau-Kondrotas, Matthieu Simon, Baptiste Legrand, Jean-Louis Bantignies, Young Kee Kang, Dan Dumitrescu, Arie Van Der Lee, Jean-Marc Campagne, Renata Marcia de Figueiredo, Ludovic T. Maillard
CHEMISTRY-A EUROPEAN JOURNAL
(2019)
Article
Chemistry, Multidisciplinary
Ludovic T. Maillard, Hae Sook Park, Young Kee Kang
Article
Chemistry, Physical
Sung Bo Hwang, Chang Joon Lee, Sehan Lee, Songling Ma, Young-Mook Kang, Kwang Hwi Cho, Su-Yeon Kim, Oh Young Kwon, Chang No Yoon, Young Kee Kang, Jeong Hyeok Yoon, Ky-Youb Nam, Seong-Gon Kim, Youngyong In, Han Ha Chai, William E. Acree, J. Andrew Grant, Ken D. Gibson, Mu Shik Jhon, Harold A. Scheraga, Kyoung Tai No
JOURNAL OF PHYSICAL CHEMISTRY B
(2020)
Article
Chemistry, Medicinal
Clement Bonnel, Baptiste Legrand, Matthieu Simon, Margaux Clavie, Agnes Masnou, Estelle Jumas-Bilak, Young Kee Kang, Patricia Licznar-Fajardo, Ludovic T. Maillard, Nicolas Masurier
JOURNAL OF MEDICINAL CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Hae Sook Park, Young Kee Kang
Summary: The study found that folded structures with C-10 H-bonded pseudocycles were preferred for dimer and tetramer of δAc(5)a residues, while different helical structures preferences may exist in solution. Additionally, pyrrolidine-substituted analogues with adjacent amine diads could be potential catalysts.
Article
Chemistry, Multidisciplinary
Chanhyun Jung, Siyuan Li, Kwanghee Lee, Mayavan Viji, Heesoon Lee, Soonsil Hyun, Kiho Lee, Young Kee Kang, Chhabi Lal Chaudhary, Jae-Kyung Jung
Summary: In this study, solvent-directed intramolecular hydrofunctionalization of readily available o-alkynoylphenols was successfully achieved under reagent-free conditions. The strategy is remarkable for its regioselectivity, atom economy, and efficiency in terms of atom, carbon, and reaction mass.
Article
Chemistry, Multidisciplinary
Hae Sook Park, Young Kee Kang
Summary: The conformational preferences of oligopeptides with a cyclopentane substituent on epsilon-amino acid residues were studied in chloroform and water. Four residues were found to induce a substantial H-16 helix population. Amc(5)a oligomers preferred the H-16 helical structure, while Ampa oligomers exhibited different helical conformations in chloroform and water.
Article
Chemistry, Multidisciplinary
Hae Sook Park, Byung Jin Byun, Young Kee Kang
Summary: The conformational preferences of Leu-Enkephalin (Leu-Enk) were investigated using conformational search and density functional theory (DFT) calculations. The study found that neutral Leu-Enk adopts a folded structure in the gas phase, while zwitterionic Leu-Enk exhibits a folded structure stabilized by double beta-bends in water. These findings provide insights into the conformational characteristics of Leu-Enk in different environments.
Article
Chemistry, Multidisciplinary
Hae Sook Park, Young Kee Kang
Summary: The study investigated the puckering transitions of Ac-Pro-X with trans and cis prolyl peptide bonds using DFT methods in the gas phase and in water. It revealed differences in barriers to the puckering transition depending on the C-terminal end group, with the placement of specific residues expected to enhance the stability of collagen triple helices in collagen model peptides.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Young Kee Kang, Hae Sook Park
Article
Chemistry, Multidisciplinary
Hae Sook Park, Young Kee Kang
NEW JOURNAL OF CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Clement Bonnel, Baptiste Legrand, Matthieu Simon, Jean Martinez, Jean-Louis Bantignies, Young Kee Kang, Emmanuel Wenger, Francois Hoh, Nicolas Masurier, Ludovic T. Maillard
CHEMISTRY-A EUROPEAN JOURNAL
(2017)
Article
Chemistry, Physical
Nam Sook Kang, Young Kee Kang
CHEMICAL PHYSICS LETTERS
(2017)