The chiral 3D MOFs resulted from the packing of chiral 1D SBBs were studied. It was demonstrated that the final packing pattern is sensitively dependent on the dimension of SBBs. In addition, we were able to identify a new plywood-like network from ligand 2H(2) exhibiting an unprecedented six-way chiral helical packing motif, which extends the list of invariant rod packings.
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http://dx.doi.org/10.1039/c1cc12908b | DOI Listing |
Cell
December 2024
Schaller Research Groups, Department of Infectious Diseases, Virology, Heidelberg University, Heidelberg, Germany; BioQuant, Heidelberg University, Heidelberg, Germany. Electronic address:
Structure
December 2024
Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur, NH 62, Nagaur Road, Karwar 342030, Jodhpur, Rajasthan, India. Electronic address:
Ferritins are ubiquitous and play a critical role in iron homeostasis. They are classified into four main subfamilies: classical, bacterial, bacterioferritin, and Dps. These are characterized by subunits with a four-helical bundle domain and interact through three distinct regions-one antiparallel interface (IntA) and two perpendicular interfaces (IntB and IntC), collectively forming a cage-like structure.
View Article and Find Full Text PDFJ Pept Sci
February 2025
Plant Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, UP, India.
Interactions between aromatic side chains of amino acids stabilize the fold and assembly of short peptides. The aromatic π…π and C-H…π interactions have been widely explored in the design of short peptides with specific folding and aggregation patterns. In the present study, we investigated the effect of homologated phenylalanine side chains on the conformation and assembly of peptide helices through X-ray crystallographic structure determination and analysis of five pentapeptides.
View Article and Find Full Text PDFChemistry
December 2024
Ulsan National Institute of Science and Technology, Chemistry, UNIST-gil 50, Bldg.108, Rm901-5, 44919, Ulsan, KOREA, REPUBLIC OF.
Nanographenes and polycyclic aromatic hydrocarbons, both finite forms of graphene, are promising organic semiconducting materials because their optoelectronic and magnetic properties can be modulated through precise control of their molecular peripheries. Several atomically precise edge structures have been prepared by bottom-up synthesis; however, no systematic elucidation of these edge topologies at the molecular level has been reported. Herein, we describe rationally designed modular syntheses of isomeric dibenzoixenes with diverse molecular peripheries, including cove, zigzag, bay, fjord, and gulf structured.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
October 2024
Laboratory of Organic and Physical Chemistry, Applied Bioorganic Chemistry Team, Faculty of Sciences, Ibnou Zohr University, Agadir, Morocco.
The title mol-ecule, CHBrNO, adopts a cup shaped conformation with the distinctly ruffled imidazolidine ring as the base. In the crystal, weak C-H⋯O hydrogen bonds and C-H⋯π(ring) inter-actions form helical chains of mol-ecules extending along the -axis direction that are linked by additional weak C-H⋯π(ring) inter-actions across inversion centres. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H⋯H (51.
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