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Baramov T, Schmid B, Ryu H, Jeong J, Keijzer K, von Eckardstein L, Baik MH, Süssmuth RD. How Many O-Donor Groups in Enterobactin Does It Take to Bind a Metal Cation? Chemistry 2019; 25:6955-6962. [PMID: 30816591 DOI: 10.1002/chem.201900453] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Indexed: 12/16/2022]
Abstract
The E. coli siderophore enterobactin, the strongest FeIII chelator known to date, forms hexacoordinate complexes with SiIV , GeIV , and TiIV . Synthetic protocols have been developed to prepare non-symmetric enterobactin analogues with varying denticities. Various benzoic acid residues were coupled to the macrocyclic lactone to afford a diverse library of ligands. These enterobactin analogues were bound to SiIV , GeIV , and TiIV , and the complexes were investigated through experimental and computational techniques. The binding behavior of the synthesized chelators enabled assessment of the contribution of each of the phenolic hydroxy groups in enterobactin to metal-ion complexation. It was found that at least four O-donors are needed for enterobactin derivatives to act as metal binders. Density functional theory calculations indicate that the strong binding behavior of enterobactin can be ascribed to a diminished translational entropy penalty, a common feature of the chelate effect, coupled with the structural arrangement of the three catechol moieties, which allows the triseryl base to be installed without distorting the preferred local metal-binding geometry of the catecholate ligands.
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Affiliation(s)
- Todor Baramov
- Institut für Chemie, Technische Universität Berlin, Fakultät II, Strasse des 17. Juni 124, 10623, Berlin, Germany
| | - Bianca Schmid
- Institut für Chemie, Technische Universität Berlin, Fakultät II, Strasse des 17. Juni 124, 10623, Berlin, Germany
| | - Ho Ryu
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Korea
| | - Jinhoon Jeong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Korea
| | - Karlijn Keijzer
- Institut für Chemie, Technische Universität Berlin, Fakultät II, Strasse des 17. Juni 124, 10623, Berlin, Germany
| | - Leonard von Eckardstein
- Institut für Chemie, Technische Universität Berlin, Fakultät II, Strasse des 17. Juni 124, 10623, Berlin, Germany
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Korea
| | - Roderich D Süssmuth
- Institut für Chemie, Technische Universität Berlin, Fakultät II, Strasse des 17. Juni 124, 10623, Berlin, Germany
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Henker J, Wirmer-Bartoschek J, Bendel LE, Xiang Y, Fu C, Harms K, Schwalbe H, Meggers E. Progress in the Synthesis and Bioactivity of Hexacoordinate Silicon(IV) Complexes. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600953] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jens Henker
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Julia Wirmer-Bartoschek
- Institute for Organic Chemistry and Chemical Biology; Center of Biomolecular Magnetic Resonance (BMRZ); Goethe University Frankfurt/Main; Max-von-Laue Strasse 7 60438 Frankfurt Germany
| | - Lars Erik Bendel
- Institute for Organic Chemistry and Chemical Biology; Center of Biomolecular Magnetic Resonance (BMRZ); Goethe University Frankfurt/Main; Max-von-Laue Strasse 7 60438 Frankfurt Germany
| | - Yonggang Xiang
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Chen Fu
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Klaus Harms
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Harald Schwalbe
- Institute for Organic Chemistry and Chemical Biology; Center of Biomolecular Magnetic Resonance (BMRZ); Goethe University Frankfurt/Main; Max-von-Laue Strasse 7 60438 Frankfurt Germany
| | - Eric Meggers
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
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Baramov T, Keijzer K, Irran E, Mösker E, Baik MH, Süssmuth R. Synthesis and structural characterization of hexacoordinate silicon, germanium, and titanium complexes of the E. coli siderophore enterobactin. Chemistry 2013; 19:10536-42. [PMID: 23821482 DOI: 10.1002/chem.201301825] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Indexed: 11/07/2022]
Abstract
The E. coli siderophore enterobactin, one of the strongest Fe(III) chelators known to date, is also capable of binding Si(IV) under physiological conditions. We report on the synthesis and structural characterization of the tris(catecholate) Si(IV) -enterobactin complex and its Ge(IV) and Ti(IV) analogues. Comparative structural analysis, supported by quantum-chemical calculations, reveals the correlation between the ionic radius and the structural changes in enterobactin upon complexation.
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Affiliation(s)
- Todor Baramov
- Technische Universität Berlin, Fakultät II, Institut für Chemie, Strasse des 17. Juni 124, 10623 Berlin, Germany
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Theis B, Weiß J, Lippert WP, Bertermann R, Burschka C, Tacke R. Zwitterionic and Anionic Multinuclear Pentacoordinate Silicon(IV) Complexes with Bridging (R,R)-Tartrato(4−) Ligands and SiO5 Skeletons: Synthesis and Reactivity in Aqueous Solution. Chemistry 2012; 18:2202-6. [DOI: 10.1002/chem.201102815] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Indexed: 11/08/2022]
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