Hierarchical Self‐Assembly of Luminescent Eu
III
Complexes on Silicon
摘要:
AbstractWe have combined the metal‐coordinating features of phenanthroline with the remarkable complexing properties of tetraphosphonate (Tiiii) cavitands towards N‐methylammonium salts with the aim of assembling novel luminescent ternary complexes. The formation of such complexes was first tested in solution: the charged sarcosine derivative 1, bearing a phenanthroline moiety, was complexed by the cavitand Tiiii‐A, followed by coordination of EuIII–tris(β‐diketonate) complex 2. The occurrence of the self‐assembly has been proven by NMR spectroscopy, mass spectrometry and photophysical measurements. The transfer of this binding protocol to the surface showed the complete orthogonality of these interactions, as verified by control experiments on complexation‐inactive surfaces. The formation of the ternary complexes on the silicon surface was monitored by means of X‐ray photoelectron spectroscopy and luminescence spectroscopy. The emission properties of the silicon‐bound Si‐Tiiii‐B·1·2 and the corresponding ternary complex Tiiii‐A·1·2 in solution are similar, which indicates that the transfer of the self‐assembly process onto silicon does not significantly perturb the EuIII coordination environment. The self‐assembly protocol illustrated here can be extended to a wide variety of lanthanide ions and can be implemented for applications in sensing, bioimaging and optoelectronic devices.
Hierarchical Self‐Assembly of Luminescent Eu
III
Complexes on Silicon
摘要:
AbstractWe have combined the metal‐coordinating features of phenanthroline with the remarkable complexing properties of tetraphosphonate (Tiiii) cavitands towards N‐methylammonium salts with the aim of assembling novel luminescent ternary complexes. The formation of such complexes was first tested in solution: the charged sarcosine derivative 1, bearing a phenanthroline moiety, was complexed by the cavitand Tiiii‐A, followed by coordination of EuIII–tris(β‐diketonate) complex 2. The occurrence of the self‐assembly has been proven by NMR spectroscopy, mass spectrometry and photophysical measurements. The transfer of this binding protocol to the surface showed the complete orthogonality of these interactions, as verified by control experiments on complexation‐inactive surfaces. The formation of the ternary complexes on the silicon surface was monitored by means of X‐ray photoelectron spectroscopy and luminescence spectroscopy. The emission properties of the silicon‐bound Si‐Tiiii‐B·1·2 and the corresponding ternary complex Tiiii‐A·1·2 in solution are similar, which indicates that the transfer of the self‐assembly process onto silicon does not significantly perturb the EuIII coordination environment. The self‐assembly protocol illustrated here can be extended to a wide variety of lanthanide ions and can be implemented for applications in sensing, bioimaging and optoelectronic devices.
Comparative Studies of the Cellular Uptake, Subcellular Localization, and Cytotoxic and Phototoxic Antitumor Properties of Ruthenium(II)–Porphyrin Conjugates with Different Linkers
作者:Jing-Xiang Zhang、Jun-Wei Zhou、Chi-Fai Chan、Terrence Chi-Kong Lau、Daniel W. J. Kwong、Hoi-Lam Tam、Nai-Ki Mak、Ka-Leung Wong、Wai-Kwok Wong
DOI:10.1021/bc300201h
日期:2012.8.15
free-base porphyrin-Ru(II) conjugates, 1–3, and Zn(II) porphyrin-Ru(II) conjugates, 4–6, with differentlinkers between the hydrophobic porphyrin moiety and the hydrophilic Ru(II)-polypyridyl complex, have been synthesized. The linear and two-photon-induced photophysical properties of these conjugates were measured and evaluated for their potential application as dual in vitro imaging and photodynamic
Method for determining activity of cell cycle regulatory factor and method for diagnosing cancer using the same
申请人:Sysmex Corporation
公开号:EP1233060A2
公开(公告)日:2002-08-21
A method for determining the activity of a cell cycle regulatory factor comprising the steps of:
preparing a sample for measuring a cyclin-dependent kinase/cyclin complex from living cells;
reacting adenosine 5'-O-(3-thiotriphosphate) (ATP-γ S) with a substrate for the cyclin-dependent kinase in presence of the sample in order to introduce a monothiophosphate group into a serine or threonine residue of the substrate;
labeling the substrate by coupling a labeling fluorophore or a labeling enzyme with a sulfur atom of the introduced monothiophosphate group;
measuring the amount of fluorescence from the labeling fluorophore labeling the substrate, or reacting the labeling enzyme labeling the substrate with a substance which generates an optically detectable product by reaction with the labeling enzyme and optically measuring the amount of the generated product; and
calculating the activity of the cyclin-dependent kinase from the measured amount of fluorescence or the measured amount of the generated product with reference to a pre-produced reference curve.
Method for determining activity of cell cycle regulatory factor and method for diagnosing cancer using the same
申请人:SYSMEX CORPORATION
公开号:EP1609854A1
公开(公告)日:2005-12-28
A method for determining the activity of a cell cycle regulatory factor comprising the steps of:
preparing a sample for measuring a cyclin-dependent kinase/cyclin complex from living cells;
reacting adenosine 5'-O-(3-thiotriphosphate) (ATP-γ S) with a substrate for the cyclin-dependent kinase in presence of the sample in order to introduce a monothiophosphate group into a serine or threonine residue of the substrate;
labeling the substrate by coupling a labeling fluorophore or a labeling enzyme with a sulfur atom of the introduced monothiophosphate group;
measuring the amount of fluorescence from the labeling fluorophore labeling the substrate, or reacting the labeling enzyme labeling the substrate with a substance which generates an optically detectable product by reaction with the labeling enzyme and optically measuring the amount of the generated product; and
calculating the activity of the cyclin-dependent kinase from the measured amount of fluorescence or the measured amount of the generated product with reference to a pre-produced reference curve.
Disclosed is a cyclin-dependent kinase substrate including a polypeptide that contains an amino acid sequence represented by formula (1): R1-P (wherein R1 represents a serine residue or a threonine residue, P represents a proline residue, "-" represents a single bond, and the left side represents the N-terminal side), and satisfies the following (al) and/or (bl): (al) the second amino acid residue counting from the proline residue toward the N-terminal side in the formula (1) is an aromatic amino acid residue, and/or (bl) at least two amino acid residues from the proline residue toward the C-terminal side in the formula (1) are acidic amino acid residues.
本发明公开了一种细胞周期蛋白依赖性激酶底物,包括一种多肽,该多肽含有由式(1)表示的氨基酸序列:R1-P(其中 R1 代表丝氨酸残基或苏氨酸残基,P 代表脯氨酸残基,"-"代表单键,左侧代表 N 端),并满足以下(al)和/或(bl):(al) 式(1)中从脯氨酸残基向 N 端侧数的第二个氨基酸残基是芳香族氨基酸残基,和/或 (bl) 式(1)中从脯氨酸残基向 C 端侧数的至少两个氨基酸残基是酸性氨基酸残基。
Cyclin-dependent kinase substrate
申请人:SYSMEX CORPORATION
公开号:US10851403B2
公开(公告)日:2020-12-01
Disclosed is a cyclin-dependent kinase substrate including a polypeptide that contains an amino acid sequence represented by formula (1): R1—P (wherein R1 represents a serine residue or a threonine residue, P represents a proline residue, “—” represents a single bond, and the left side represents the N-terminal side), and satisfies the following (a1) and/or (b1): (a1) the second amino acid residue counting from the proline residue toward the N-terminal side in the formula (1) is an aromatic amino acid residue, and/or (b1) at least two amino acid residues from the proline residue toward the C-terminal side in the formula (1) are acidic amino acid residues.
本发明公开了一种细胞周期蛋白依赖性激酶底物,包括一种多肽,该多肽含有由式(1)表示的氨基酸序列:R1-P(其中 R1 代表丝氨酸残基或苏氨酸残基,P 代表脯氨酸残基,"-"代表单键,左侧代表 N 端),并满足以下(a1)和/或(b1):(a1) 式(1)中从脯氨酸残基向 N 端侧数的第二个氨基酸残基是芳香族氨基酸残基,和/或 (b1) 式(1)中从脯氨酸残基向 C 端侧数的至少两个氨基酸残基是酸性氨基酸残基。