Article
Chemistry, Multidisciplinary
Saikat Pahan, Sanjit Dey, Gijo George, Souvik Panda Mahapatra, DRGKoppalu R. Puneeth Kumar, Hosahudya. N. Gopi
Summary: In this study, chiral beta-double helices constructed from specific amino acids were observed in both single crystals and in solution. These structures can transport ions across membranes, suggesting their potential applications in designing functional foldamers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Friedericke S. Menke, Barbara Wicher, Lars Allmendinger, Victor Maurizot, Ivan Huc
Summary: Through the synthesis of four helically folded aromatic oligoamide sequences, it was found that the 2-(2-aminophenoxy)-propionic acid unit can quantitatively bias helix handedness in chloroform and dichloromethane. Helix handedness control was achieved by introducing an N-terminal (1H)-camphanyl group or a 2-(2-aminophenoxy)-propionic acid unit in specific helical segments. The formation of stable helix-turn-helix tertiary folds was observed in some cases.
Review
Chemistry, Multidisciplinary
Nikhil Bajpayee, Thangavel Vijayakanth, Sigal Rencus-Lazar, Sneha Dasgupta, Aamod V. Desai, Rahul Jain, Ehud Gazit, Rajkumar Misra
Summary: Flexible and biocompatible metal peptide frameworks (MPFs) have been developed from short and ultra-short peptides for various applications such as greenhouse gas storage, molecular recognition, and chiral transformations. Recently, specifically folded peptides have been utilized to fabricate metal helix frameworks (MHFs) that control the formation of three-dimensional (3D)-MHFs. This article describes the recent progress of metal-driven folded peptide assembly for constructing 3D porous structures with potential applications in energy storage, chiral recognition, and biomedical fields, serving as an alternative to conventional metal-organic frameworks (MOFs).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Violeta Markovic, Jeelan Basha Shaik, Katarzyna Ozga, Agnieszka Ciesiolkiewicz, Juan Lizandra Perez, Ewa Rudzinska-Szostak, Lukasz Berlicki
Summary: The entry of the SARS-CoV-2 virus into a human host cell begins with the interaction between the viral spike protein (S protein) and human angiotensin-converting enzyme 2 (hACE2). A possible strategy for the treatment of this infection is based on inhibiting the interaction of the two abovementioned proteins.
JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY
(2023)
Article
Polymer Science
Shuang Cao, Chenchen Sun, Jing Wang, Qian Jiang, Yuan Qiu, Hong Wang, Yonggui Liao, Xiaolin Xie
Summary: This study demonstrates that the induction and inversion of helix in Poly-1 foldamer can be achieved by increasing the concentration of sterically hindered chiral amino acid perchlorate salts. The results show that the sandwich mode complex between chiral enantiomers and aza-18-crown-6 rings leads to helix induction, while the occupation of each aza-18-crown-6 ring by one enantiomer facilitates helix inversion. This work provides a new strategy for regulating folded helical conformations and has implications for the development of chiral recognition materials.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Cell Biology
Atreya Dey, Guang Shi, Ryota Takaki, D. Thirumalai
Summary: The study develops a computational framework that predicts changes in chromosome organization during mitosis using a loop extrusion (LE) mechanism facilitated by multiple condensin I/II motors. The framework accurately reproduces experimental contact probability profiles in HeLa and DT40 cells. The study also reveals the presence of a central dynamically changing helical scaffold formed by the motors during the LE process, with condensin II-mediated loops being larger than condensin I-mediated loops.
Article
Chemistry, Multidisciplinary
Ho Seong Hwang, Hong Ju Jung, Jin Goo Kim, Hyeon Su Jeong, Won Jun Lee, Sang Ouk Kim
Summary: This study presents a method for the macroscopic self-assembly of 2D materials into helical screws. The helical screws consist of multiple helices and perversions formed through the spontaneous rotation of 1D fiber assembly of 2D materials. The study also investigates the influence of spontaneous helix formation on the properties of the assembled fibers.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Multidisciplinary
Hui-Chuan Zhao, Li-Chun Bian, Tao Zhang, Jia-Jun Dong
Summary: This study establishes a double-layered composite beam model to investigate the influence of chiral microstructure of biomaterials on the formation of tendrils' chiral morphologies. The results demonstrate a significant dependence of the macro chiral phases of plant tendrils on their chiral microstructures.
Review
Chemistry, Multidisciplinary
Romain Costil, Mira Holzheimer, Stefano Crespi, Nadja A. Simeth, Ben L. Feringa
Summary: Molecular photoactuators can control the shape and properties of responsive systems through supramolecular interactions, allowing work to be done at micro- and macroscopic scales. Stereochmical cascades within photoresponsive structures can amplify motion to distant components, offering potential in designing the smallest imaginable machines.
Article
Materials Science, Biomaterials
Ketav Kulkarni, Jenisi Kelderman, Harold Coleman, Marie-Isabel Aguilar, Helena Parkington, Mark Del Borgo
Summary: Researchers have successfully synthesized a novel beta-amino acid to allow for the self-assembly of a trifunctional beta-tripeptide, which acts as a bioactive neuronal scaffold, showing promise for studies involving neuronal cell growth and development.
JOURNAL OF MATERIALS CHEMISTRY B
(2021)
Article
Chemistry, Medicinal
Alicia Corlett, Jo-Anne Pinson, Marwa N. Rahimi, Jessica Van Zuylekom, Carleen Cullinane, Benjamin Blyth, Philip E. Thompson, Craig A. Hutton, Peter D. Roselt, Mohammad B. Haskali
Summary: This study synthesized and characterized a series of Lu-177-labeled peptides ([Lu-177]Lu-2b-4b) and compared them with the reference CCK(2)R-targeting peptide CP04 ([Lu-177]Lu-1b). [Lu-177]Lu-1b-4b showed high chemical purity, low Log D, strong binding affinity to CCK2R, and relatively high protein binding and internalization. Biodistribution studies showed that [Lu-177]Lu-2b-4b had higher uptake in tumors compared to CP04 at different time points. These findings suggest that [Lu-177]Lu-2b-4b could be a promising therapy for CCK2R-expressing tumors.
JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
DRGKoppalu Puneeth R. Kumar, Zahid Manzoor Bhat, Sanjit Dey, Souvik Roy, Souvik Panda Mahapatra, Saikat Pahan, Musthafa Ottakam Thotiyl, Hosahudya N. Gopi
Summary: The development of miniaturized lab-on-chip devices for the detection of small molecule-protein interactions at low concentrations is of great importance in drug discovery and biomedicine. In this study, label-free detection of small molecule-protein interactions was achieved using nanoscale capacitance and impedance spectroscopy on surface functionalizable nanotubes of α, γ-hybrid peptide helical foldamers. The functionalizable hybrid peptide nanotubes enabled the label-free detection of various small molecule-protein interactions at very low concentrations.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Li Zhou, Xun-Hui Xu, Zhi-Qiang Jiang, Lei Xu, Ben-Fa Chu, Na Liu, Zong-Quan Wu
Summary: Inspired by natural helices, this study focused on the fabrication of helical materials with controlled handedness. It was found that helices of opposite handedness exhibited different activity, with the unfavored handedness being self-terminated and the favored handedness showing high activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Sebastian Dengler, Ryan T. Howard, Vasily Morozov, Christos Tsiamantas, Wei-En Huang, Zhiwei Liu, Christopher Dobrzanski, Vojislava Pophristic, Sophie Brameyer, Celine Douat, Hiroaki Suga, Ivan Huc
Summary: Expanding the chemical diversity of peptide macrocycle libraries through the inclusion of a large aromatic helical foldamer has been implemented. A hybrid macrocyclic nanomolar binder to the C-lobe of the E6AP HECT domain was selected, and its crystal structure and molecular dynamics simulations revealed an intriguing reciprocal helical folding of the peptide and foldamer. The results represent a significant extension in the chemical space amenable to display selection and highlight the potential benefits of incorporating an aromatic foldamer into a peptide macrocycle for protein recognition.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Qi Lin, Hao Lan, Chunmiao Ma, Ryan T. Stendall, Kenneth Shankland, Rebecca A. Musgrave, Peter N. Horton, Carsten Baldauf, Hans-Joerg Hofmann, Craig P. Butts, Manuel M. Mueller, Alexander J. A. Cobb
Summary: We present the first structures of an unusual helix formed by a heteromeric sequence of alpha- and delta-amino acids and demonstrate its application in catalysis. The helix formation is driven by intramolecular hydrogen bonds, but we also observed an apolar interaction that stabilizes one type of helix over another. This unique stabilization enables the alpha-residues to engage in bifunctional catalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Jayasubba Reddy Yarava, Yusuke Nishiyama, Srinivasarao Raghothama, Krishna Venkatachala Ramanathan
CHEMICAL BIOLOGY & DRUG DESIGN
(2020)
Article
Chemistry, Multidisciplinary
Rahi M. Reja, Vivek Kumar, Gijo George, Rajat Patel, D. R. G. Koppalu R. Puneeth Kumar, Srinivasarao Raghothama, Hosahudya N. Gopi
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Article
Biochemistry & Molecular Biology
Ashwini Dolle, K. Kasi Amarnath Reddy, Shubha Shridhar Gunaga, Kiran Krishnamurthy, Dillip Kumar Senapati, Abhijit Rana, Kishorkumar Sindogi, Himansu S. Biswal, Srinivasarao Raghothama, Konkallu Hanumae Gowd
JOURNAL OF PEPTIDE SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
K. Kasi Amarnath Reddy, Smriti Moi, Ashwini Dolle, Basavaprabhu Hosamani, Kiran Krishnamurthy, Sunita Prakash, Srinivasarao Raghothama, Konkallu Hanumae Gowd
HELVETICA CHIMICA ACTA
(2020)
Article
Chemistry, Multidisciplinary
Sanjit Dey, Rajkumar Misra, Abhijith Saseendran, Saikat Pahan, Hosahudya N. Gopi
Summary: Short alpha,gamma-hybrid tripeptide sequences can form stable helical structures even in the presence of amino acids favoring beta-sheets, and their hybrid helix can coordinate with metal ions to form selective metallogels. X-ray diffraction analysis of peptide single crystals obtained from the gel matrix shows that the helical structure is maintained during the self-assembly process, and a 3D helical crystalline coordination polymer with permanent porosity can be generated by varying the counter anion.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Editorial Material
Chemistry, Multidisciplinary
Haribabu Arthanari, Kandala V. R. Chary, Thomas Szyperski, Krishna V. Ramanathan, Ramakrishna V. Hosur, Nagarajarao Suryaprakash, Srinivasarao Raghothama, Naranamangalam R. Jagannathan, Raymond S. Norton, Erode N. Prabhakaran, Paturu Kondaish, Sulakshana P. Mukherjee, Satish Kumar Adiga, RamaKrishna Vadrevu, Anirban Bhunia, David Joseph
MAGNETIC RESONANCE IN CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Ashwini Dolle, Marimuthu Vijayasarathy, Shamasoddin Shekh, Yamanappa Hunashal, K. Kasi Amarnath Reddy, Sunita Prakash, Abhijit Rana, Himansu S. Biswal, Srinivasarao Raghothama, Konkallu Hanumae Gowd
Summary: The novel conopeptides Li504 and Li520, derived from the venom duct transcriptome of the marine cone snail Conus lividus, may act as oxidoreductases and have a certain impact on the oxidative folding of conotoxins.
Article
Chemistry, Physical
Smriti Moi, Basavaprabhu Hosamani, Kiran Kumar, Shubha Gunaga, Srinivasarao Raghothama, Konkallu Hanumae Gowd
Summary: This study focused on improving the photostability of avobenzone by adopting a skeletal modification approach and synthesizing new derivatives. The new avobenzone derivatives showed improved photostability, rapid recovery from degradation products, and enhanced response to the photostabilizer glutathione compared to the original avobenzone. Computational calculations using density functional theory supported the experimental observations, suggesting that these new derivatives could potentially serve as alternatives to avobenzone in sunscreen formulations.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
DRGKoppalu Puneeth R. Kumar, Zahid Manzoor Bhat, Sanjit Dey, Souvik Roy, Souvik Panda Mahapatra, Saikat Pahan, Musthafa Ottakam Thotiyl, Hosahudya N. Gopi
Summary: The development of miniaturized lab-on-chip devices for the detection of small molecule-protein interactions at low concentrations is of great importance in drug discovery and biomedicine. In this study, label-free detection of small molecule-protein interactions was achieved using nanoscale capacitance and impedance spectroscopy on surface functionalizable nanotubes of α, γ-hybrid peptide helical foldamers. The functionalizable hybrid peptide nanotubes enabled the label-free detection of various small molecule-protein interactions at very low concentrations.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Souvik Roy, Aman Chaturvedi, Sanjit Dey, DRGKoppalu R. Puneeth Kumar, Saikat Pahan, Souvik Panda Mahapatra, Pankaj Mandal, Hosahudya N. Gopi
Summary: Metals are crucial for the structure and functions of proteins. The combination of metal ions and peptides is an attractive method to create advanced structures and biomaterials. In this study, short peptides were able to form diverse metal-coordinated networks and helical structures through interactions with silver salts.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
DRGKoppalu R. Puneeth R. Kumar, Rahi M. M. Reja, Dillip K. K. Senapati, Manjeet Singh, Sachin A. A. Nalawade, Gijo George, Grace Kaul, Abdul Akhir, Sidharth Chopra, Srinivasarao Raghothama, Hosahudya N. N. Gopi
Summary: Directing A beta(42) to adopt a conformation that is free from aggregation and cell toxicity is an attractive and viable strategy to design therapeutics for Alzheimer's disease. Over the years, extensive efforts have been made to disrupt the aggregation of A beta(42) using various types of inhibitors but with limited success. Herein, we report the inhibition of aggregation of A beta(42) and disintegration of matured fibrils of A beta(42) into smaller assemblies by a 15-mer cationic amphiphilic peptide.
RSC MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Deepika Yadav, A. K. Dixit, S. Raghothama, Satish Kumar Awasthi
DALTON TRANSACTIONS
(2020)
Article
Chemistry, Multidisciplinary
Rajkumar Misra, Gijo George, Rahi M. Reja, Sanjit Dey, Srinivasarao Raghothama, Hosahudya N. Gopi
CHEMICAL COMMUNICATIONS
(2020)