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Zheng Y, Yu L, Zou Y, Yang Y, Wang C. Steric Dependence of Chirality Effect in Surface-Mediated Peptide Assemblies Identified with Scanning Tunneling Microscopy. NANO LETTERS 2019; 19:5403-5409. [PMID: 31265784 DOI: 10.1021/acs.nanolett.9b01904] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Amino acid chirality has been recognized as an important driving force in constructing peptide architectures, via interactions such as chirality-induced stereochemical effect. The introduction of site-specific chiral conversion of l- and d-amino acids in peptide sequences could enable the pursuit of the chirality effects in peptide assembly. In this work, we characterized the assemblies of heptapeptides with various side chain moieties and their chiral variants using STM. Specifically, two pairs of amino acids, Gln (Q) and Asn (N), Glu (E) and Asp (D), having one methylene difference in their side chains, are selected to elucidate the steric dependence of amino acid chiral effects on surface-bound peptide assemblies. The observed heptapeptide assembly structures reveal that chirality switching of a single amino acid is able to destabilize the surface-mediated peptide assemblies, and this disturbance effect can be positively correlated with the steric hindrance of amino acid side chains. Furthermore, the strength of the impact due to chiral conversion on heptapeptide assembly structure is noticeably dependent on the mutation sites, indicative of structural heterogeneity of chiral effects. These results could contribute to the molecular insights of chirality-induced stereochemical interactions in peptide assembly.
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Affiliation(s)
- Yongfang Zheng
- CAS Key Laboratory of Biological Effects of Nanomaterials and Nanosafety, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Lanlan Yu
- CAS Key Laboratory of Biological Effects of Nanomaterials and Nanosafety, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Yimin Zou
- CAS Key Laboratory of Biological Effects of Nanomaterials and Nanosafety, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Yanlian Yang
- CAS Key Laboratory of Biological Effects of Nanomaterials and Nanosafety, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Chen Wang
- CAS Key Laboratory of Biological Effects of Nanomaterials and Nanosafety, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
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Sakai S, Hiro A, Kondo M, Mizuno T, Tanaka T, Dewa T, Nango M. Overexpression of Rhodobacter sphaeroides PufX-bearing maltose-binding protein and its effect on the stability of reconstituted light-harvesting core antenna complex. PHOTOSYNTHESIS RESEARCH 2012; 111:63-69. [PMID: 21809113 DOI: 10.1007/s11120-011-9673-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2011] [Accepted: 07/12/2011] [Indexed: 05/31/2023]
Abstract
The PufX protein, encoded by the pufX gene of Rhodobacter sphaeroides, plays a key role in the organization and function of the core antenna (LH1)-reaction centre (RC) complex, which collects photons and triggers primary photochemical reactions. We synthesized a PufX/maltose-binding protein (MBP) fusion protein to study the effect of the PufX protein on the reconstitution of B820 subunit-type and LH1-type complexes. The fusion protein was synthesized using an Escherichia coli expression system and purified by affinity chromatography. Reconstitution experiments demonstrated that the MBP-PufX protein destabilizes the subunit-type complex (20°C), consistent with previous reports. Interestingly, however, the preformed LH1-type complex was stable in the presence of MBP-PufX. The MBP-PufX protein did not influence the preformed LH1-type complexes (4°C). The LH1-type complex containing MBP-PufX showed a unique temperature-dependent structural transformation that was irreversible. The predominant form of the complex at 4°C was the LH1-type. When shifted to 20°C, subunit-type complexes became predominant. Upon subsequent cooling back to 4°C, instead of re-forming the LH1-type complexes, the predominant form remained the subunit-type complexes. In contrast, reversible transformation of LH1 (4°C) and subunit-type complexes (20°C) occurs in the absence of PufX. These results are consistent with the suggestion that MBP-PufX interacts with the LH1α- polypeptide in the subunit (α/β)-type complex (at 20°C), preventing oligomerization of the subunit to form LH1-type complexes.
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Affiliation(s)
- Shunnsuke Sakai
- Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan
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Kondo M, Iida K, Dewa T, Tanaka H, Ogawa T, Nagashima S, Nagashima KVP, Shimada K, Hashimoto H, Gardiner AT, Cogdell RJ, Nango M. Photocurrent and electronic activities of oriented-His-tagged photosynthetic light-harvesting/reaction center core complexes assembled onto a gold electrode. Biomacromolecules 2012; 13:432-8. [PMID: 22239547 DOI: 10.1021/bm201457s] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A polyhistidine (His) tag was fused to the C- or N-terminus of the light-harvesting (LH1)-α chain of the photosynthetic antenna core complex (LH1-RC) from Rhodobacter sphaeroides to allow immobilization of the complex on a solid substrate with defined orientation. His-tagged LH1-RCs were adsorbed onto a gold electrode modified with Ni-NTA. The LH1-RC with the C-terminal His-tag (C-His LH1-RC) on the modified electrode produced a photovoltaic response upon illumination. Electron transfer is unidirectional within the RC and starts when the bacteriochlorophyll a dimer in the RC is activated by light absorbed by LH1. The LH1-RC with the N-terminal His-tag (N-His LH1-RC) produced very little or no photocurrent upon illumination at any wavelength. The conductivity of the His-tagged LH1-RC was measured with point-contact current imaging atomic force microscopy, indicating that 60% of the C-His LH1-RC are correctly oriented (N-His 63%). The oriented C-His LH1-RC or N-His LH1-RC showed semiconductive behavior, that is, had the opposite orientation. These results indicate that the His-tag successfully controlled the orientation of the RC on the solid substrate, and that the RC produced photocurrent depending upon the orientation on the electrode.
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Affiliation(s)
- Masaharu Kondo
- Department of Frontier Materials, Tsukuri College, Graduate School of Engineering, Nagoya Institute of Technology , Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Sakai S, Hiro A, Sumino A, Mizuno T, Tanaka T, Hashimoto H, Dewa T, Nango M. Reconstitution and Organization of Photosynthetic Antenna Protein Complex Bearing Functional Hydrophilic Domains. CHEM LETT 2011. [DOI: 10.1246/cl.2011.1280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Cohen-Ofri I, van Gastel M, Grzyb J, Brandis A, Pinkas I, Lubitz W, Noy D. Zinc-Bacteriochlorophyllide Dimers in de Novo Designed Four-Helix Bundle Proteins. A Model System for Natural Light Energy Harvesting and Dissipation. J Am Chem Soc 2011; 133:9526-35. [DOI: 10.1021/ja202054m] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ilit Cohen-Ofri
- Plant Sciences Department, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Maurice van Gastel
- Max Planck Institute for Bioinorganic Chemistry, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Joanna Grzyb
- Plant Sciences Department, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Alexander Brandis
- Plant Sciences Department, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Iddo Pinkas
- Plant Sciences Department, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Wolfgang Lubitz
- Max Planck Institute for Bioinorganic Chemistry, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Dror Noy
- Plant Sciences Department, Weizmann Institute of Science, Rehovot 76100, Israel
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Structure-Function Relationships in Bacterial Light-Harvesting Complexes Investigated by Reconstitution Techniques. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/978-1-4020-8815-5_10] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Ochiai T, Asaoka T, Kato T, Osaka S, Dewa T, Yamashita K, Gardiner AT, Hashimoto H, Nango M. Molecular assembly of Zn porphyrin complexes using synthetic light-harvesting model polypeptides. PHOTOSYNTHESIS RESEARCH 2008; 95:353-361. [PMID: 18049908 DOI: 10.1007/s11120-007-9280-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2007] [Accepted: 11/15/2007] [Indexed: 05/25/2023]
Abstract
Synthetic single alpha-helix hydrophobic polypeptides, which have similar amino acid sequences to the hydrophobic core in the native light-harvesting 1-beta polypeptide from Rhodobacter sphaeroides, formed Zn porphyrin complexes on a gold electrode, as well as in n-octyl-beta-glucoside micelles: this process is dependent on the structure of the pigments and the polypeptides. Interestingly, an enhanced photoelectric current was observed when Zn mesoporphyrin monomer complexed with the synthetic light-harvesting model polypeptide in an alpha-helical configuration was assembled with a defined orientation onto the electrode. Analog of these light-harvesting model complexes are also useful in providing insights into the effect of polypeptide structure on the formation of light-harvesting complexes on and off electrodes.
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Affiliation(s)
- Tsuyoshi Ochiai
- Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan
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Ochiai T, Ota M, Asaoka T, Kato T, Osaka S, Dewa T, Yamashita K, Hashimoto H, Nango M. Molecular Assembly of BChlaComplexes onto ITO Electrode Using Synthetic Light-harvesting Model Polypeptides Bearing Spermine Derivative. CHEM LETT 2008. [DOI: 10.1246/cl.2008.98] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ochiai T, Asaoka T, Kato T, Osaka S, Dewa T, Yamashita K, Hashimoto H, Nango M. Molecular assembly of Zn porphyrin complexes onto a gold electrode using synthetic light-harvesting model polypeptides. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.09.158] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Dewa T, Sugiura R, Suemori Y, Sugimoto M, Takeuchi T, Hiro A, Iida K, Gardiner AT, Cogdell RJ, Nango M. Lateral organization of a membrane protein in a supported binary lipid domain: direct observation of the organization of bacterial light-harvesting complex 2 by total internal reflection fluorescence microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:5412-8. [PMID: 16732671 DOI: 10.1021/la060275d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
A unique method is described for directly observing the lateral organization of a membrane protein (bacterial light-harvesting complex LH2) in a supported lipid bilayer using total internal reflection fluorescence (TIRF) microscopy. The supported lipid bilayer consisted of anionic 1,2-dioleoyl-sn-glycero-3-[phospho-rac-(1'-glycerol)] (DOPG) and 1,2-distearoly-sn-3-[phospho-rac-(1'-glycerol)] (DSPG) and was formed through the rupture of a giant vesicle on a positively charged coverslip. TIRF microscopy revealed that the bilayer was composed of phase-separated domains. When a suspension of cationic phospholipid (1,2-dioleoyl-sn-glycero-3-ethylphosphocholine: EDOPC) vesicles (approximately 400 nm in diameter), containing LH2 complexes (EDOPC/LH2 = 1000/1), was put into contact with the supported lipid bilayer, the cationic vesicles immediately began to fuse and did so specifically with the fluid phase (DOPG-rich domain) of the supported bilayer. Fluorescence from the incorporated LH2 complexes gradually (over approximately 20 min) spread from the domain boundary into the gel domain (DSPG-rich domain). Similar diffusion into the domain-structured supported lipid membrane was observed when the fluorescent lipid (1,2-dioleoyl-sn-glycero-3-phosphoethanolamine-N-lissamine-rhodamine B sulfonyl: N-Rh-DOPE) was incorporated into the vesicles instead of LH2. These results indicate that vesicles containing LH2 and lipids preferentially fuse with the fluid domain, after which they laterally diffuse into the gel domain. This report describes for first time the lateral organization of a membrane protein, LH2, via vesicle fusion and subsequent lateral diffusion of the LH2 from the fluid to the gel domains in the supported lipid bilayer. The biological implications and applications of the present study are briefly discussed.
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Affiliation(s)
- Takehisa Dewa
- Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan.
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Selective Organization of an .ALPHA.-Helical Hydrophobic Polypeptide/Pigment Complex in a Lipid Domain of Binary Lipid Bilayers. E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY 2005. [DOI: 10.1380/ejssnt.2005.145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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