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8 citations found for Ju, H
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The hydrolase BL28 from B. licheniformis was crystallized in the tetragonal space group P41212 and diffraction data were collected to 1.67 Å resolution.
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In the title compound, C31H27N3, the cyclohexene ring has an envelope configuration. In the crystal structure, there is an 34 Å3 void around the inversion center, but the low electron density (0.13 e Å-3) in the difference Fourier map suggests no solvent molecule occupying this void. No hydrogen bonding is found in the crystal structure.
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The crystal structure of Est-Y29, a metagenomic homologue of the penicillin-binding protein/β-lactamase family, was determined at 1.70 Å resolution. The biochemical properties of Est-Y29 were also investigated for potential biotechnological applications.
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The crystal structure of Est25, a bacterial homologue of hormone-sensitive lipase (HSL), was determined at 1.49 Å resolution. The biochemical properties of Est25 were investigated to clarify the functional capacities of HSL and the potential applications of Est25 in biotechnology.
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This work demonstrates how small changes in the structural connectivity, arising from two different types of carboxylate bonding of benzene-1,4-dicarboxylate ligands to zinc(II), have an impact on the overall structural, physical and photochemical properties in two isomeric double-pillared-layer coordination polymeric structures.
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The complexation of an NO2S2 macrocycle with CdI2 offers an opportunity to identify the kinetic and thermodynamic products via visual methods because the direct observation and structural characterization of each product were available from sequential snapshots, single-crystal X-ray structures and powder X-ray diffraction patterns.
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Our interest in the development of MOFs with the cavities controlled by guest species has led us to investigate the MOFs based on calix[4]arene derivatives, in which metal ions link the calix unit to give the networks with the cavities accommodating several guest species, because the calix[4]arene-based MOFs contain porosity associated with both the ligand itself and the structural framework. In the present work, we employed a low rim-functionalized calix[4]arene tetraacetic acid (H4CTA) with 1,3-alternative conformation as a multidentate building block and alkyldiamines as the guest molecules. In the solvothermal reaction of H4CTA and Zn(II) ion in the presence of alkyldiamines, two types of new MOFs based on calix[4]arene tetraacetate (CTA4-) depending on the lengths of α,ω–alkyldiammonium guests have been synthesized by including suitable alkyldiammonium guests. Their single-crystal X-ray diffraction analyses reveal that the short alkyldiammonium guests such as ethyldiammonium, propyldiammonium, and butyldiammonium lead to form two-dimensional framework with the cavity consisting of two CTA4- and four Zn(II) ions whereas the alkyldiammonium guests such as heptyldiammonium, octyldiammonium, nonyldiammonium, and decyldiammonium give rise to generate three-dimensional network with the cavity surrounded by six CTA4- and four Zn(II) ions. The alkyldiammonium guests in both MOFs are well accommodated by each cavity via a variety of supramolecular interactions including electrostatic interactions, hydrogen bonds and van der Waals interactions. We will present and discuss a study on the syntheses and characterization of two new MOFs based on calix[4]arene derivative.
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Esterase A from C. crescentus CB15 was crystallized in space group C2221 and diffraction data were collected to a resolution of 1.62 Å.