1
|
Wu IL, Narayan K, Castaing JP, Tian F, Subramaniam S, Ramamurthi KS. A versatile nano display platform from bacterial spore coat proteins. Nat Commun 2015; 6:6777. [PMID: 25854653 PMCID: PMC4396682 DOI: 10.1038/ncomms7777] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 02/26/2015] [Indexed: 12/20/2022] Open
Abstract
Dormant bacterial spores are encased in a thick protein shell, the ‘coat', which contains ∼70 different proteins. The coat protects the spore from environmental insults, and is among the most durable static structures in biology. Owing to extensive cross-linking among coat proteins, this structure has been recalcitrant to detailed biochemical analysis, so molecular details of how it assembles are largely unknown. Here, we reconstitute the basement layer of the coat atop spherical membranes supported by silica beads to create artificial spore-like particles. We report that these synthetic spore husk-encased lipid bilayers (SSHELs) assemble and polymerize into a static structure, mimicking in vivo basement layer assembly during sporulation in Bacillus subtilis. In addition, we demonstrate that SSHELs may be easily covalently modified with small molecules and proteins. We propose that SSHELs may be versatile display platforms for drugs and vaccines in clinical settings, or for enzymes that neutralize pollutants for environmental remediation. The densely crosslinked protein coats of bacterial spores are among the most durable static structures in biology. Wu et al. reconstitute the basement layer of a bacterial spore coat on membrane-coated beads, and generate covalently-modified spore-like particles with therapeutic potential.
Collapse
Affiliation(s)
- I-Lin Wu
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Kedar Narayan
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Jean-Philippe Castaing
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Fang Tian
- Department of Biochemistry and Molecular Biology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033, USA
| | - Sriram Subramaniam
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Kumaran S Ramamurthi
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| |
Collapse
|
2
|
Zhang X, Liu H, Miao Z, Kimura R, Fan F, Cheng Z. Macrocyclic chelator assembled RGD multimers for tumor targeting. Bioorg Med Chem Lett 2011; 21:3423-6. [PMID: 21524578 PMCID: PMC3098922 DOI: 10.1016/j.bmcl.2011.03.110] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 03/24/2011] [Accepted: 03/29/2011] [Indexed: 10/18/2022]
Abstract
Macrocyclic chelators have been extensively used for complexation of metal ions. A widely used chelator, DOTA, has been explored as a molecular platform to assemble multiple bioactive peptides in this paper. The multivalent DOTA-peptide bioconjugates demonstrate promising tumor targeting ability.
Collapse
Affiliation(s)
- Xiaofen Zhang
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University Medical Center, California, 94305, USA
- Institute of Radiation Medicine, Chinese Academy of Medical Science, Peking Union Medical College, Tsinghua University, Tianjin, 300192, China
| | - Hongguang Liu
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University Medical Center, California, 94305, USA
| | - Zheng Miao
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University Medical Center, California, 94305, USA
| | - Richard Kimura
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University Medical Center, California, 94305, USA
| | - Feiyue Fan
- Institute of Radiation Medicine, Chinese Academy of Medical Science, Peking Union Medical College, Tsinghua University, Tianjin, 300192, China
| | - Zhen Cheng
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University Medical Center, California, 94305, USA
| |
Collapse
|
3
|
Bastings MMC, Helms BA, van Baal I, Hackeng TM, Merkx M, Meijer EW. From phage display to dendrimer display: insights into multivalent binding. J Am Chem Soc 2011; 133:6636-41. [PMID: 21473586 DOI: 10.1021/ja110700x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Phage display is widely used for the selection of target-specific peptide sequences. Presentation of phage peptides on a multivalent platform can be used to (partially) restore the binding affinity. Here, we present a detailed analysis of the effects of valency, linker choice, and receptor density on binding affinity of a multivalent architecture, using streptavidin (SA) as model multivalent receptor. For surfaces with low receptor densities, the SA binding affinity of multivalent dendritic phage peptide constructs increases over 2 orders of magnitude over the monovalent species (e.g., K(d,mono) = 120 μM vs K(d,tetra) = 1 μM), consistent with previous work. However, the affinity of the SA-binding phage presenting the exact same peptides was 16 pM when dense receptor surfaces used for initial phage display were used in assays. The phage affinity for SA-coated surfaces weakens severely toward the nanomolar regime when surface density of SA is decreased. A similarly strong dependence in this respect was observed for dendritic phage analogues. When presented with a dense SA-coated surface, dendrimer display affords up to a 10(4)-fold gain in affinity over the monovalent peptide. The interplay between ligand valency and receptor density is a fundamental aspect of multivalent targeting strategies in biological systems. The perspective offered here suggests that in vivo targeting schemes might best be served to conduct ligand selection under physiologically relevant receptor density surfaces, either by controlling the receptor density placed at the selection surface or by using more biologically relevant intact cells and tissues.
Collapse
Affiliation(s)
- Maartje M C Bastings
- Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | | | | | | | | | | |
Collapse
|
4
|
Lempens EHM, Merkx M, Tirrell M, Meijer EW. Dendrimer Display of Tumor-Homing Peptides. Bioconjug Chem 2011; 22:397-405. [DOI: 10.1021/bc100403e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Edith H. M. Lempens
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Maarten Merkx
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Matthew Tirrell
- Department of Chemical Engineering and Materials Research Laboratory, University of California Santa Barbara, California 93106-5080, United States
| | - E. W. Meijer
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|
5
|
Ein Meisterstück in der Synthese: wohldefinierte, multivalente und multimodale dendritische Architekturen für biomedizinische Anwendungen. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003968] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
6
|
Röglin L, Lempens EHM, Meijer EW. A Synthetic “Tour de Force”: Well‐Defined Multivalent and Multimodal Dendritic Structures for Biomedical Applications. Angew Chem Int Ed Engl 2010; 50:102-12. [DOI: 10.1002/anie.201003968] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Lars Röglin
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven (The Netherlands), Fax: (+31) 40‐245‐1036
| | - Edith H. M. Lempens
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven (The Netherlands), Fax: (+31) 40‐245‐1036
| | - E. W. Meijer
- Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven (The Netherlands), Fax: (+31) 40‐245‐1036
| |
Collapse
|
7
|
Peptide and glycopeptide dendrimers and analogous dendrimeric structures and their biomedical applications. Amino Acids 2010; 40:301-70. [DOI: 10.1007/s00726-010-0707-z] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Accepted: 07/15/2010] [Indexed: 02/08/2023]
|
8
|
Helms BA, Reulen SWA, Nijhuis S, Graaf-Heuvelmans PTHMD, Merkx M, Meijer EW. High-Affinity Peptide-Based Collagen Targeting Using Synthetic Phage Mimics: From Phage Display to Dendrimer Display. J Am Chem Soc 2009; 131:11683-5. [DOI: 10.1021/ja902285m] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Brett A. Helms
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Sanne W. A. Reulen
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Sebastiaan Nijhuis
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Peggy T. H. M. de Graaf-Heuvelmans
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Maarten Merkx
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - E. W. Meijer
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| |
Collapse
|