JBIC Journal of Biological Inorganic Chemistry最新文献

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Evaluation of Au(III) complexes as Plasmodium falciparum aquaglyceroporin (PfAQP) inhibitors by in silico and in vitro methods 通过硅学和体外方法评估作为恶性疟原虫水甘油腺苷(PfAQP)抑制剂的 Au(III)配合物。
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-11-23 DOI: 10.1007/s00775-024-02081-x
Federico Balgera, Muyideen Kolapo Tijani, Johan Wennerberg, Kristina E. M. Persson, Ebbe Nordlander, Ricardo J. Ferreira
{"title":"Evaluation of Au(III) complexes as Plasmodium falciparum aquaglyceroporin (PfAQP) inhibitors by in silico and in vitro methods","authors":"Federico Balgera,&nbsp;Muyideen Kolapo Tijani,&nbsp;Johan Wennerberg,&nbsp;Kristina E. M. Persson,&nbsp;Ebbe Nordlander,&nbsp;Ricardo J. Ferreira","doi":"10.1007/s00775-024-02081-x","DOIUrl":"10.1007/s00775-024-02081-x","url":null,"abstract":"<div><p>The onset of resistance to artemisinin for malaria treatment has stimulated the quest for novel antimalarial drugs. Herein, the gold(III) coordination complexes Aubipy [Au(bipy)Cl]<sup>+</sup> (bipy = 2,2′-bipyridine), Auphen [Au(phen)Cl]<sup>+</sup> (phen = phenanthroline), Auterpy [Au(terpy)Cl]<sup>2+</sup> (terpy = 2,2′;6′,2″-terpyridine), and corresponding hydrolyzed species, have been investigated as inhibitors of the <i>Plasmodium falciparum</i> aquaglyceroporin (<i>Pf</i>AQP) protein by computational methods. Through an <i>in-silico</i> approach using an Umbrella Sampling protocol to sample how Aubipy, Auphen, and Auterpy permeate through the <i>Pf</i>AQP, their permeability coefficients were estimated using the Inhomogeneous Solubility Diffusion (ISD) model with promising results. The efficacy of the gold complexes was then probed by an in vitro assay testing the growth inhibition in chloroquine sensitive and resistant <i>P. falciparum</i> strains. In accordance with the computational data, Auterpy achieved the highest efficiency with an IC<sub>50</sub> in the nanomolar range (590 nM) on resistant strain cultures, additionally revealing a good selectivity as compared to its activity against the human aquaglyceroporin 3.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":603,"journal":{"name":"JBIC Journal of Biological Inorganic Chemistry","volume":"29 7-8","pages":"821 - 836"},"PeriodicalIF":2.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142695115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ascorbate: a forgotten component in the cytotoxicity of Cu(II) ATCUN peptide complexes 抗坏血酸:Cu(II) ATCUN 肽复合物细胞毒性中被遗忘的成分。
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-11-11 DOI: 10.1007/s00775-024-02083-9
Julian Heinrich, Elisa Siddiqui, Henrike Eckstein, Michael Naumann, Nora Kulak
{"title":"Ascorbate: a forgotten component in the cytotoxicity of Cu(II) ATCUN peptide complexes","authors":"Julian Heinrich,&nbsp;Elisa Siddiqui,&nbsp;Henrike Eckstein,&nbsp;Michael Naumann,&nbsp;Nora Kulak","doi":"10.1007/s00775-024-02083-9","DOIUrl":"10.1007/s00775-024-02083-9","url":null,"abstract":"<div><p>In 1983, Linus Pauling and colleagues reported about enhanced antitumor activity of the Cu(II) complex of the simplest ATCUN (amino terminal Cu(II) and Ni(II)-binding motif) peptide (NH<sub>2</sub>-Gly-Gly-His-COOH, GGH) in the presence of ascorbate as an additive. In the following 4 decades, structural modifications of this complex were implemented, however, anticancer activity could not be significantly increased. This has led to neglecting the ATCUN motif and its Cu(II) complexes as potential chemotherapeutic agents. Furthermore, the addition of ascorbate with its positive effect on the anticancer activity has fallen into oblivion. In this work, we compared Cu(II) GGH with Cu(II) ATCUN peptides bearing β-Ala instead of Gly at the 2nd position of the peptide sequence regarding their in vitro complex stability and cytotoxicity (MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) and annexin V-FITC (fluorescein isothiocyanate) apoptosis assay) towards three cancer cell lines (AGS, HeLa and NCI-N87). Such an exchange of amino acids led to an up to three-fold higher cytotoxic effect in the presence of ascorbate. We thus achieved a significant increase in the otherwise moderate cytotoxicity of Cu(II) ATCUN-like complexes. Lipophilicity assays (<i>n</i>-octanol/water coefficient, log <i>P</i> values) of the studied complexes were used to evaluate differences in the antiproliferative activity.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":603,"journal":{"name":"JBIC Journal of Biological Inorganic Chemistry","volume":"29 7-8","pages":"801 - 809"},"PeriodicalIF":2.7,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00775-024-02083-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142611676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction: Quantitative proteomic analysis reveals Ga(III) polypyridyl catecholate complexes disrupt Aspergillus fumigatus mitochondrial function 更正:定量蛋白质组分析显示,Ga(III)多吡啶儿茶酚复合物会破坏曲霉线粒体的功能。
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-10-30 DOI: 10.1007/s00775-024-02079-5
Magdalena Piatek, Brunella Grassiri, Lewis More O’Ferrall, Anna Maria Piras, Giovanna Batoni, Semih Esin, Christine O’Connor, Darren Griffith, Anne Marie Healy, Kevin Kavanagh
{"title":"Correction: Quantitative proteomic analysis reveals Ga(III) polypyridyl catecholate complexes disrupt Aspergillus fumigatus mitochondrial function","authors":"Magdalena Piatek,&nbsp;Brunella Grassiri,&nbsp;Lewis More O’Ferrall,&nbsp;Anna Maria Piras,&nbsp;Giovanna Batoni,&nbsp;Semih Esin,&nbsp;Christine O’Connor,&nbsp;Darren Griffith,&nbsp;Anne Marie Healy,&nbsp;Kevin Kavanagh","doi":"10.1007/s00775-024-02079-5","DOIUrl":"10.1007/s00775-024-02079-5","url":null,"abstract":"","PeriodicalId":603,"journal":{"name":"JBIC Journal of Biological Inorganic Chemistry","volume":"29 7-8","pages":"719 - 720"},"PeriodicalIF":2.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electron transfer in biological systems 生物系统中的电子转移
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-10-18 DOI: 10.1007/s00775-024-02076-8
Helder M. Marques
{"title":"Electron transfer in biological systems","authors":"Helder M. Marques","doi":"10.1007/s00775-024-02076-8","DOIUrl":"10.1007/s00775-024-02076-8","url":null,"abstract":"<div><p>Examples of how metalloproteins feature in electron transfer processes in biological systems are reviewed. Attention is focused on the electron transport chains of cellular respiration and photosynthesis, and on metalloproteins that directly couple electron transfer to a chemical reaction. Brief mention is also made of extracellular electron transport. While covering highlights of the recent and the current literature, this review is aimed primarily at introducing the senior undergraduate and the novice postgraduate student to this important aspect of bioinorganic chemistry.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":603,"journal":{"name":"JBIC Journal of Biological Inorganic Chemistry","volume":"29 7-8","pages":"641 - 683"},"PeriodicalIF":2.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00775-024-02076-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142455359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rapid method for screening of both calcium and magnesium chelation with comparison of 21 known metal chelators 通过比较 21 种已知金属螯合剂,快速筛选钙镁螯合剂的方法。
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-10-18 DOI: 10.1007/s00775-024-02078-6
Lukáš Konečný, Zuzana Lomozová, Galina Karabanovich, Jaroslav Roh, Kateřina Vávrová, Přemysl Mladěnka
{"title":"Rapid method for screening of both calcium and magnesium chelation with comparison of 21 known metal chelators","authors":"Lukáš Konečný,&nbsp;Zuzana Lomozová,&nbsp;Galina Karabanovich,&nbsp;Jaroslav Roh,&nbsp;Kateřina Vávrová,&nbsp;Přemysl Mladěnka","doi":"10.1007/s00775-024-02078-6","DOIUrl":"10.1007/s00775-024-02078-6","url":null,"abstract":"<div><p>Chelation is the rational treatment modality in metal overload conditions, but chelators are often non-selective and can, hence, cause an imbalance in the homeostasis of physiological metals including calcium and magnesium. The aim of this study was to develop an affordable, rapid but sensitive and precise method for determining the degree of chelation of calcium and magnesium ions and to employ this method for comparison on a panel of known metal chelators. Spectrophotometric method using <i>o</i>-cresolphthalein complexone (<i>o</i>-CC) was developed and its biological relevance was confirmed in human platelets by impedance aggregometry. The lowest detectable concentration of calcium and magnesium ions by <i>o-</i>CC was 2.5 μM and 2 μM, respectively. The indicator was stable for at least 110 days. Four and seven out of twenty-one chelators strongly chelated calcium and magnesium ions, respectively. Importantly, the chelation effect of clinically used chelators was not negligible. Structure–activity relationships for eight quinolin-8-ols showed improvements in chelation particularly in the cases of dihalogen substitution, and a negative linear relationship between pKa and magnesium chelation was observed. Calcium chelation led to inhibition of platelet aggregation in concentrations corresponding to the complex formation. A novel method for screening of efficacy and safety of calcium and magnesium ion chelation was developed and validated.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":603,"journal":{"name":"JBIC Journal of Biological Inorganic Chemistry","volume":"29 7-8","pages":"785 - 800"},"PeriodicalIF":2.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00775-024-02078-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142455360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development and validation of an ICP-MS method and its application in assessing heavy metals in whole blood samples among occupationally exposed lead smelting plant workers ICP-MS 方法的开发和验证及其在评估职业接触铅冶炼厂工人全血样本中重金属含量中的应用。
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-10-17 DOI: 10.1007/s00775-024-02077-7
Kuldip Upadhyay, Ankit Viramgami, Rakesh Balachandar, Ankit Sheth, P. Sivaperumal
{"title":"Development and validation of an ICP-MS method and its application in assessing heavy metals in whole blood samples among occupationally exposed lead smelting plant workers","authors":"Kuldip Upadhyay,&nbsp;Ankit Viramgami,&nbsp;Rakesh Balachandar,&nbsp;Ankit Sheth,&nbsp;P. Sivaperumal","doi":"10.1007/s00775-024-02077-7","DOIUrl":"10.1007/s00775-024-02077-7","url":null,"abstract":"<div><p>Occupational exposure to heavy metals affects various organ systems and poses a significant health risk to workers. Consequently, its precise estimation is of clinical concern and warrants the need for an analytical method with reliable precision and accuracy. The current study aimed to develop an analytical method using inductively coupled plasma‒mass spectrometry (ICP-MS) to detect trace to elevated levels of potentially toxic elements in human blood. The sample preparation was optimized using a two-step ramp temperature microwave acid digestion program. The toxic elements were quantified using ICP-MS operating in kinetic energy discrimination (KED) mode, adjusting the data acquisition parameters and instrumental settings. The analytical method was validated using standard performance parameters. Each validation parameter was aligned with the acceptable criteria outlined in standard guidelines. The method achieved optimal linearity (<i>r</i><sup>2</sup> &gt; 0.99), recovery (85.60–112.00%), and precision (1.35–7.03%), was capable of detecting the lowest concentrations of 0.32, 0.28, 0.28, and 0.19 µg/L, and was capable of quantifying trace levels of 1.01, 0.88, 0.90, and 0.62 µg/L for arsenic (As), cadmium (Cd), mercury (Hg), and lead (Pb), respectively. Post-validation, the method was applied to estimate heavy metals in blood samples from 250 Pb-smelting plant workers, revealing potential health implications of occupational exposure. The cohort analysis revealed that demographic and employment factors were associated with elevated blood Pb levels, leading to symptoms and health risks. Clinical analysis revealed that 33.6% of the participants experienced hypertension. These findings highlight the significant health risks associated with elevated blood Pb levels. The weak but significant correlation with systolic blood pressure underscores the need for improved monitoring and workplace safety. This emphasizes the importance of continuous monitoring, targeted interventions, and enhanced occupational hygiene to protect workers’ well-being.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":603,"journal":{"name":"JBIC Journal of Biological Inorganic Chemistry","volume":"29 7-8","pages":"763 - 771"},"PeriodicalIF":2.7,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142455358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Protoporphyrin IX iron(II) revisited. An overview of the Mössbauer spectroscopic parameters of low-spin porphyrin iron(II) complexes 原卟啉 IX 铁(II)重温。低自旋卟啉铁(II)配合物的莫斯鲍尔光谱参数概览。
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-10-10 DOI: 10.1007/s00775-024-02075-9
Jack Silver, Daniel den Engelsen, Golzar al-Jaff, Jehad A. Taies, Michael T. Wilson, George R. Fern
{"title":"Protoporphyrin IX iron(II) revisited. An overview of the Mössbauer spectroscopic parameters of low-spin porphyrin iron(II) complexes","authors":"Jack Silver,&nbsp;Daniel den Engelsen,&nbsp;Golzar al-Jaff,&nbsp;Jehad A. Taies,&nbsp;Michael T. Wilson,&nbsp;George R. Fern","doi":"10.1007/s00775-024-02075-9","DOIUrl":"10.1007/s00775-024-02075-9","url":null,"abstract":"<div><p>Mössbauer parameters of low-spin six-coordinate [Fe(II)(Por)L<sub>2</sub>] complexes (where Por is a synthetic porphyrin; L is a nitrogenous aliphatic, an aromatic base or a heterocyclic ligand, a P-bonding ligand, CO or CN) and low-spin [Fe(Por)LX] complexes (where L and X are different ligands) are reported. A known point charge calculation approach was extended to investigate how the axial ligands and the four porphyrinato-N atoms generate the observed quadrupole splittings (<i>Δ</i><i>E</i><sub>Q</sub>) for the complexes. Partial quadrupole splitting (p.q.s.) and partial chemical shifts (p.c.s.) values were derived for all the axial ligands, and porphyrins reported in the literature. The values for each porphyrin are different emphasising the importance/uniqueness of the [Fe(PPIX)] moiety, (which is ubiquitous in nature). This new analysis enabled the construction of figures relating p.c.s and p.q.s values. The relationships presented in the figures indicates that strong field ligands such as CO can, and do change the sign of the electric field gradient in the [Fe(II)(Por)L<sub>2</sub>] complexes. The limiting p.q.s. value a ligand can have and still form a six-coordinate low-spin [Fe(II)(Por)L<sub>2</sub>] complex is established. It is shown that the control the porphyrin ligands exert on the low-spin Fe(II) atom limits its bonding to a defined range of axial ligands; outside this range the spin state of the iron is unstable and five-coordinate high-spin complexes are favoured. Amongst many conclusions, it was found that oxygen cannot form a stable low-spin [Fe(II)(Por)L(O<sub>2</sub>)] complex and that oxy-haemoglobin is best described as an [Fe(III)(Por)L(O<sub>2</sub><sup>−</sup>)] complex, the iron is ferric bound to the superoxide molecule.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":603,"journal":{"name":"JBIC Journal of Biological Inorganic Chemistry","volume":"29 7-8","pages":"721 - 761"},"PeriodicalIF":2.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00775-024-02075-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142387178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantitative proteomic analysis reveals Ga(III) polypyridyl catecholate complexes disrupt Aspergillus fumigatus mitochondrial function 定量蛋白质组分析表明,Ga(III)多吡啶儿茶酚复合物会破坏曲霉线粒体的功能。
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-09-23 DOI: 10.1007/s00775-024-02074-w
Magdalena Piatek, Brunella Grassiri, Lewis More O’Ferrall, Anna Maria Piras, Giovanna Batoni, Semih Esin, Christine O’Connor, Darren Griffith, Anne Marie Healy, Kevin Kavanagh
{"title":"Quantitative proteomic analysis reveals Ga(III) polypyridyl catecholate complexes disrupt Aspergillus fumigatus mitochondrial function","authors":"Magdalena Piatek,&nbsp;Brunella Grassiri,&nbsp;Lewis More O’Ferrall,&nbsp;Anna Maria Piras,&nbsp;Giovanna Batoni,&nbsp;Semih Esin,&nbsp;Christine O’Connor,&nbsp;Darren Griffith,&nbsp;Anne Marie Healy,&nbsp;Kevin Kavanagh","doi":"10.1007/s00775-024-02074-w","DOIUrl":"10.1007/s00775-024-02074-w","url":null,"abstract":"<div><p>Infections caused by the airborne fungal pathogen, <i>Aspergillus fumigatus</i>, are increasing in severity due to growing numbers of immunocompromised individuals and the increasing incidence of antifungal drug resistance, exacerbating treatment challenges. Gallium has proven to be a strong candidate in the fight against microbial pathogens due to its iron-mimicking capability and substitution of Ga(III) in place of Fe(III), disrupting iron-dependent pathways. Since the antimicrobial properties of 2,2′-bipyridine and derivatives have been previously reported, we assessed the in vitro activity and proteomic effects of a recently reported heteroleptic Ga(III) polypyridyl catecholate compound against <i>A. fumigatus</i>. This compound has demonstrated promising growth-inhibition and impact on the <i>A. fumigatus</i> proteome compared to untreated controls. Proteins associated with DNA replication and repair mechanisms along with lipid metabolism and the oxidative stress responses were elevated in abundance compared to control. Crucially, a large number of mitochondrial proteins were reduced in abundance. Respiration is an important source of energy to fuel metabolic processes required for growth, survival and virulence, the disruption of which may be a viable strategy for the treatment of microbial infections.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":603,"journal":{"name":"JBIC Journal of Biological Inorganic Chemistry","volume":"29 7-8","pages":"707 - 717"},"PeriodicalIF":2.7,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142306905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Antibacterial activity of Au(I), Pt(II), and Ir(III) biotin conjugates prepared by the iClick reaction: influence of the metal coordination sphere on the biological activity 通过 iClick 反应制备的 Au(I)、Pt(II) 和 Ir(III) 生物素共轭物的抗菌活性:金属配位层对生物活性的影响。
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-08-29 DOI: 10.1007/s00775-024-02073-x
Dominik Moreth, Lars Stevens-Cullinane, Thomas W. Rees, Victoria V. L. Müller, Adrien Pasquier, Ok-Ryul Song, Scott Warchal, Michael Howell, Jeannine Hess, Ulrich Schatzschneider
{"title":"Antibacterial activity of Au(I), Pt(II), and Ir(III) biotin conjugates prepared by the iClick reaction: influence of the metal coordination sphere on the biological activity","authors":"Dominik Moreth,&nbsp;Lars Stevens-Cullinane,&nbsp;Thomas W. Rees,&nbsp;Victoria V. L. Müller,&nbsp;Adrien Pasquier,&nbsp;Ok-Ryul Song,&nbsp;Scott Warchal,&nbsp;Michael Howell,&nbsp;Jeannine Hess,&nbsp;Ulrich Schatzschneider","doi":"10.1007/s00775-024-02073-x","DOIUrl":"10.1007/s00775-024-02073-x","url":null,"abstract":"<div><p>A series of biotin-functionalized transition metal complexes was prepared by iClick reaction from the corresponding azido complexes with a novel alkyne-functionalized biotin derivative ([Au(triazolato<sup>R,R′</sup>)(PPh<sub>3</sub>)], [Pt(dpb)(triazolato<sup>R,R′</sup>)], [Pt(triazolato<sup>R,R′</sup>)(terpy)]PF<sub>6</sub>, and [Ir(ppy)(triazolato<sup>R,R′</sup>)(terpy)]PF<sub>6</sub> with dpb = 1,3-di(2-pyridyl)benzene, ppy = 2-phenylpyridine, and terpy = 2,2′:6′,2′′-terpyridine and R = C<sub>6</sub>H<sub>5</sub>, R′ = biotin). The complexes were compared to reference compounds lacking the biotin moiety. The binding affinity toward avidin and streptavidin was evaluated with the HABA assay as well as isothermal titration calorimetry (ITC). All compounds exhibit the same binding stoichiometry of complex-to-avidin of 4:1, but the ITC results show that the octahedral Ir(III) compound exhibits a higher binding affinity than the square-planar Pt(II) complex. The antibacterial activity of the compounds was evaluated on a series of Gram-negative and Gram-positive bacterial strains. In particular, the neutral Au(I) and Pt(II) complexes showed significant antibacterial activity against <i>Staphylococcus aureus</i> and <i>Enterococcus faecium</i> at very low micromolar concentrations. The cytotoxicity against a range of eukaryotic cell lines was studied and revealed that the octahedral Ir(III) complex was non-toxic, while the square-planar Pt(II) and linear Au(I) complexes displayed non-selective micromolar activity.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":603,"journal":{"name":"JBIC Journal of Biological Inorganic Chemistry","volume":"29 6","pages":"573 - 582"},"PeriodicalIF":2.7,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142091367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Understanding the role of negative charge in the scaffold of an artificial enzyme for CO2 hydrogenation on catalysis 了解负电荷在二氧化碳氢化人工催化酶支架中的作用。
IF 2.7 3区 化学
JBIC Journal of Biological Inorganic Chemistry Pub Date : 2024-08-29 DOI: 10.1007/s00775-024-02070-0
Regina E. Trevino, Jack T. Fuller III, Deseree J. Reid, Joseph A. Laureanti, Bojana Ginovska, John C. Linehan, Wendy J. Shaw
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