1
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Breausche F, Somerlot A, Walder J, Osei K, Okyem S, Driskell JD. Immobilization of Thiol-Modified Horseradish Peroxidase on Gold Nanoparticles Enhances Enzyme Stability and Prevents Proteolytic Digestion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:13957-13967. [PMID: 38919992 PMCID: PMC11238584 DOI: 10.1021/acs.langmuir.4c01180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/20/2024] [Accepted: 06/18/2024] [Indexed: 06/27/2024]
Abstract
The specificity and efficiency of enzyme-mediated reactions have the potential to positively impact many biotechnologies; however, many enzymes are easily degraded. Immobilization on a solid support has recently been explored to improve enzyme stability. This study aims to gain insights and facilitate enzyme adsorption onto gold nanoparticles (AuNPs) to form a stable bioconjugate through the installation of thiol functional groups that alter the protein chemistry. In specific, the model enzyme, horseradish peroxidase (HRP), is thiolated via Traut's reagent to increase the robustness and enzymatic activity of the bioconjugate. This study compares HRP and its thiolated analog (THRP) to deduce the impact of thiolation and AuNP-immobilization on the enzyme activity and stability. HRP, THRP, and their corresponding bioconjugates, HRP-AuNP and THRP-AuNP, were analyzed via UV-vis spectrophotometry, circular dichroism, zeta potential, and enzyme-substrate kinetics assays. Our data show a 5-fold greater adsorption for THRP on the AuNP, in comparison to HRP, that translated to a 5-fold increase in the THRP-AuNP bioconjugate activity. The thiolated and immobilized HRP exhibited a substantial improvement in stability at elevated temperatures (50 °C) and storage times (1 month) relative to the native enzyme in solution. Moreover, HRP, THRP, and their bioconjugates were incubated with trypsin to assess the susceptibility to proteolytic digestion. Our results demonstrate that THRP-AuNP bioconjugates maintain full enzymatic activity after 18 h of incubation with trypsin, whereas free HRP, free THRP, and HRP-AuNP conjugates are rendered inactive by trypsin treatment. These results highlight the potential for protein modification and immobilization to substantially extend enzyme shelf life, resist protease digestion, and enhance biological function to realize enzyme-enabled biotechnologies.
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Affiliation(s)
- Faith
E. Breausche
- Department
of Chemistry, Illinois State University, Normal, Illinois 61790, United States
| | - Annelise Somerlot
- Department
of Chemistry, Illinois State University, Normal, Illinois 61790, United States
| | - Jason Walder
- Department
of Chemistry, Illinois State University, Normal, Illinois 61790, United States
| | - Kwame Osei
- Department
of Chemistry, Illinois State University, Normal, Illinois 61790, United States
| | - Samuel Okyem
- Department
of Chemistry, University of Illinois at
Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Jeremy D. Driskell
- Department
of Chemistry, Illinois State University, Normal, Illinois 61790, United States
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2
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Somarathne RP, Amarasekara DL, Kariyawasam CS, Robertson HA, Mayatt R, Gwaltney SR, Fitzkee NC. Protein Binding Leads to Reduced Stability and Solvated Disorder in the Polystyrene Nanoparticle Corona. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2305684. [PMID: 38247186 PMCID: PMC11209821 DOI: 10.1002/smll.202305684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 01/03/2024] [Indexed: 01/23/2024]
Abstract
Understanding the conformation of proteins in the nanoparticle corona has important implications in how organisms respond to nanoparticle-based drugs. These proteins coat the nanoparticle surface, and their properties will influence the nanoparticle's interaction with cell targets and the immune system. While some coronas are thought to be disordered, two key unanswered questions are the degree of disorder and solvent accessibility. Here, a model is developed for protein corona disorder in polystyrene nanoparticles of varying size. For two different proteins, it is found that binding affinity decreases as nanoparticle size increases. The stoichiometry of binding, along with changes in the hydrodynamic size, supports a highly solvated, disordered protein corona anchored at a small number of attachment sites. The scaling of the stoichiometry versus nanoparticle size is consistent with disordered polymer dimensions. Moreover, it is found that proteins are destabilized less in the presence of larger nanoparticles, and hydrophobic exposure decreases at lower curvatures. The observations hold for proteins on flat polystyrene surfaces, which have the lowest hydrophobic exposure. The model provides an explanation for previous observations of increased amyloid fibrillation rates in the presence of larger nanoparticles, and it may rationalize how cell receptors can recognize protein disorder in therapeutic nanoparticles.
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Affiliation(s)
- Radha P Somarathne
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Dhanush L Amarasekara
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Chathuri S Kariyawasam
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Harley A Robertson
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Railey Mayatt
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Steven R Gwaltney
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Nicholas C Fitzkee
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
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3
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Mal S, Chakraborty S, Mahapatra M, Pakeeraiah K, Das S, Paidesetty SK, Roy P. Tackling breast cancer with gold nanoparticles: twinning synthesis and particle engineering with efficacy. NANOSCALE ADVANCES 2024; 6:2766-2812. [PMID: 38817429 PMCID: PMC11134266 DOI: 10.1039/d3na00988b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 04/10/2024] [Indexed: 06/01/2024]
Abstract
The World Health Organization identifies breast cancer as the most prevalent cancer despite predominantly affecting women. Surgery, hormonal therapy, chemotherapy, and radiation therapy are the current treatment modalities. Site-directed nanotherapeutics, engineered with multidimensional functionality are now the frontrunners in breast cancer diagnosis and treatment. Gold nanoparticles with their unique colloidal, optical, quantum, magnetic, mechanical, and electrical properties have become the most valuable weapon in this arsenal. Their advantages include facile modulation of shape and size, a high degree of reproducibility and stability, biocompatibility, and ease of particle engineering to induce multifunctionality. Additionally, the surface plasmon oscillation and high atomic number of gold provide distinct advantages for tailor-made diagnosis, therapy or theranostic applications in breast cancer such as photothermal therapy, radiotherapy, molecular labeling, imaging, and sensing. Although pre-clinical and clinical data are promising for nano-dimensional gold, their clinical translation is hampered by toxicity signs in major organs like the liver, kidneys and spleen. This has instigated global scientific brainstorming to explore feasible particle synthesis and engineering techniques to simultaneously improve the efficacy and versatility and widen the safety window of gold nanoparticles. The present work marks the first study on gold nanoparticle design and maneuvering techniques, elucidating their impact on the pharmacodynamics character and providing a clear-cut scientific roadmap for their fast-track entry into clinical practice.
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Affiliation(s)
- Suvadeep Mal
- Medicinal Chemistry Research Laboratory, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed to be University) Campus-2, Ghatikia, Kalinga Nagar Bhubaneswar Odisha 751003 India
| | | | - Monalisa Mahapatra
- Medicinal Chemistry Research Laboratory, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed to be University) Campus-2, Ghatikia, Kalinga Nagar Bhubaneswar Odisha 751003 India
| | - Kakarla Pakeeraiah
- Medicinal Chemistry Research Laboratory, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed to be University) Campus-2, Ghatikia, Kalinga Nagar Bhubaneswar Odisha 751003 India
| | - Suvadra Das
- Basic Science and Humanities Department, University of Engineering and Management Action Area III, B/5, Newtown Kolkata West Bengal 700160 India
| | - Sudhir Kumar Paidesetty
- Medicinal Chemistry Research Laboratory, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed to be University) Campus-2, Ghatikia, Kalinga Nagar Bhubaneswar Odisha 751003 India
| | - Partha Roy
- GITAM School of Pharmacy, GITAM (Deemed to be University) Vishakhapatnam 530045 India
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4
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Li N, Huang J, He S, Zheng Q, Ye F, Qin Z, Wang D, Xiao T, Mao M, Zhou Z, Tang T, Zhang L, Wang X, Wang Y, Lyu Y, Liu L, Dai L, Wang J, Guan J. The development of a novel zeolite-based assay for efficient and deep plasma proteomic profiling. J Nanobiotechnology 2024; 22:164. [PMID: 38600601 PMCID: PMC11007927 DOI: 10.1186/s12951-024-02404-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 03/18/2024] [Indexed: 04/12/2024] Open
Abstract
Plasma proteins are considered the most informative source of biomarkers for disease diagnosis and monitoring. Mass spectrometry (MS)-based proteomics has been applied to identify biomarkers in plasma, but the complexity of the plasma proteome and the extremely large dynamic range of protein abundances in plasma make the clinical application of plasma proteomics highly challenging. We designed and synthesized zeolite-based nanoparticles to deplete high-abundance plasma proteins. The resulting novel plasma proteomic assay can measure approximately 3000 plasma proteins in a 45 min chromatographic gradient. Compared to those in neat and depleted plasma, the plasma proteins identified by our assay exhibited distinct biological profiles, as validated in several public datasets. A pilot investigation of the proteomic profile of a hepatocellular carcinoma (HCC) cohort identified 15 promising protein features, highlighting the diagnostic value of the plasma proteome in distinguishing individuals with and without HCC. Furthermore, this assay can be easily integrated with all current downstream protein profiling methods and potentially extended to other biofluids. In conclusion, we established a robust and efficient plasma proteomic assay with unprecedented identification depth, paving the way for the translation of plasma proteomics into clinical applications.
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Affiliation(s)
- Nan Li
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Jingnan Huang
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital, (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518020, Guangdong, China
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
| | - Shangwen He
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Qiaocong Zheng
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
- Department of Oncology, People's Hospital of YangJiang, Yangjiang, 529500, Guangdong, China
| | - Feng Ye
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Zhengxing Qin
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Dong Wang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Ting Xiao
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Mengyuan Mao
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Zhenhua Zhou
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Tingxi Tang
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Longshan Zhang
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Xiaoqing Wang
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Yingqiao Wang
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Ying Lyu
- Department of Traditional Chinese Medicine, Nanfang Hospital,, Southern Medical University, Guangzhou, 510515, Guangdong, China
| | - Laiyu Liu
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China.
| | - Lingyun Dai
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital, (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518020, Guangdong, China.
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
| | - Jigang Wang
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital, (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, 518020, Guangdong, China.
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
| | - Jian Guan
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, China.
- Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou, 510515, Guangdong, China.
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5
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Boselli L, Castagnola V, Armirotti A, Benfenati F, Pompa PP. Biomolecular Corona of Gold Nanoparticles: The Urgent Need for Strong Roots to Grow Strong Branches. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306474. [PMID: 38085683 DOI: 10.1002/smll.202306474] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 10/20/2023] [Indexed: 04/13/2024]
Abstract
Gold nanoparticles (GNPs) are largely employed in diagnostics/biosensors and are among the most investigated nanomaterials in biology/medicine. However, few GNP-based nanoformulations have received FDA approval to date, and promising in vitro studies have failed to translate to in vivo efficacy. One key factor is that biological fluids contain high concentrations of proteins, lipids, sugars, and metabolites, which can adsorb/interact with the GNP's surface, forming a layer called biomolecular corona (BMC). The BMC can mask prepared functionalities and target moieties, creating new surface chemistry and determining GNPs' biological fate. Here, the current knowledge is summarized on GNP-BMCs, analyzing the factors driving these interactions and the biological consequences. A partial fingerprint of GNP-BMC analyzing common patterns of composition in the literature is extrapolated. However, a red flag is also risen concerning the current lack of data availability and regulated form of knowledge on BMC. Nanomedicine is still in its infancy, and relying on recently developed analytical and informatic tools offers an unprecedented opportunity to make a leap forward. However, a restart through robust shared protocols and data sharing is necessary to obtain "stronger roots". This will create a path to exploiting BMC for human benefit, promoting the clinical translation of biomedical nanotools.
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Affiliation(s)
- Luca Boselli
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia (IIT), Via Morego 30, Genova, 16163, Italy
| | - Valentina Castagnola
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, Genova, 16132, Italy
- IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, Genova, 16132, Italy
| | - Andrea Armirotti
- Analytical Chemistry Lab, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Fabio Benfenati
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, Genova, 16132, Italy
- IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, Genova, 16132, Italy
| | - Pier Paolo Pompa
- Nanobiointeractions & Nanodiagnostics, Istituto Italiano di Tecnologia (IIT), Via Morego 30, Genova, 16163, Italy
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6
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Amarasekara DL, Kariyawasam CS, Hejny MA, Torgall VB, Werfel TA, Fitzkee NC. Protein-Functionalized Gold Nanospheres with Tunable Photothermal Efficiency for the Near-Infrared Photothermal Ablation of Biofilms. ACS APPLIED MATERIALS & INTERFACES 2024; 16:4321-4332. [PMID: 38236953 PMCID: PMC10843580 DOI: 10.1021/acsami.3c13288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Temperature-responsive nanostructures with high antimicrobial efficacy are attractive for therapeutic applications against multidrug-resistant bacteria. Here, we report temperature-responsive nanospheres (TRNs) engineered to undergo self-association and agglomeration above a tunable transition temperature (Tt). The temperature-responsive behavior of the nanoparticles is obtained by functionalizing citrate-capped spherical gold nanoparticles (AuNPs) with elastin-like polypeptides (ELPs). Using protein design principles, we achieve a broad range of attainable Tt values and photothermal conversion efficiencies (η). Two approaches were used to adjust this range: First, by altering the position of the cysteine residue used to attach ELP to the AuNP, we attained a Tt range from 34 to 42 °C. Then, by functionalizing the AuNP with an additional small globular protein, we could extend this range to 34-50 °C. Under near-infrared (NIR) light exposure, all TRNs exhibited reversible agglomeration. Moreover, they showed an enhanced photothermal conversion efficiency in their agglomerated state relative to the dispersed state. Despite their spherical shape, TRNs have a photothermal conversion efficiency approaching that of gold nanorods (η = 68 ± 6%), yet unlike nanorods, the synthesis of TRNs requires no cytotoxic compounds. Finally, we tested TRNs for the photothermal ablation of biofilms. Above Tt, NIR irradiation of TRNs resulted in a 10,000-fold improvement in killing efficiency compared to untreated controls (p < 0.0001). Below Tt, no enhanced antibiofilm effect was observed. In conclusion, engineering the interactions between proteins and nanoparticles enables the tunable control of TRNs, resulting in a novel antibiofilm nanomaterial with low cytotoxicity.
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Affiliation(s)
- Dhanush L Amarasekara
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Chathuri S Kariyawasam
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Madison A Hejny
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Veeresh B Torgall
- Department of Biomedical Engineering, University of Mississippi, University, Mississippi 38677, United States
| | - Thomas A Werfel
- Department of Biomedical Engineering, University of Mississippi, University, Mississippi 38677, United States
- Department of Chemical Engineering, University of Mississippi, University, Mississippi 38677, United States
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677, United States
- Cancer Center and Research Institute, University of Mississippi Medical Center, Jackson, Mississippi 39216, United States
| | - Nicholas C Fitzkee
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
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7
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Somarathne RP, Misra SK, Kariyawasam CS, Kessl JJ, Sharp JS, Fitzkee NC. Exploring Residue-Level Interactions between the Biofilm-Driving R2ab Protein and Polystyrene Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1213-1222. [PMID: 38174900 PMCID: PMC10843815 DOI: 10.1021/acs.langmuir.3c02609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
In biological systems, proteins can bind to nanoparticles to form a "corona" of adsorbed molecules. The nanoparticle corona is of significant interest because it impacts an organism's response to a nanomaterial. Understanding the corona requires knowledge of protein structure, orientation, and dynamics at the surface. A residue-level mapping of protein behavior on nanoparticle surfaces is needed, but this mapping is difficult to obtain with traditional approaches. Here, we have investigated the interaction between R2ab and polystyrene nanoparticles (PSNPs) at the level of individual residues. R2ab is a bacterial surface protein from Staphylococcus epidermidis and is known to interact strongly with polystyrene, leading to biofilm formation. We have used mass spectrometry after lysine methylation and hydrogen-deuterium exchange (HDX) NMR spectroscopy to understand how the R2ab protein interacts with PSNPs of different sizes. Lysine methylation experiments reveal subtle but statistically significant changes in methylation patterns in the presence of PSNPs, indicating altered protein surface accessibility. HDX rates become slower overall in the presence of PSNPs. However, some regions of the R2ab protein exhibit faster than average exchange rates in the presence of PSNPs, while others are slower than the average behavior, suggesting conformational changes upon binding. HDX rates and methylation ratios support a recently proposed "adsorbotope" model for PSNPs, wherein adsorbed proteins consist of unfolded anchor points interspersed with partially structured regions. Our data also highlight the challenges of characterizing complex protein-nanoparticle interactions using these techniques, such as fast exchange rates. While providing insights into how R2ab adsorbs onto PSNP surfaces, this research emphasizes the need for advanced methods to comprehend residue-level interactions in the nanoparticle corona.
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Affiliation(s)
- Radha P Somarathne
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Sandeep K Misra
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677, United States
| | - Chathuri S Kariyawasam
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Jacques J Kessl
- Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Joshua S Sharp
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677, United States
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Nicholas C Fitzkee
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
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8
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Amarasekara DL, Kariyawasam CS, Hejny MA, Torgall VB, Werfel TA, Fitzkee NC. Near-Infrared Photothermal Ablation of Biofilms using ProteinFunctionalized Gold Nanospheres with a Tunable Temperature Response. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.12.553096. [PMID: 37645901 PMCID: PMC10462018 DOI: 10.1101/2023.08.12.553096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Temperature-responsive nanostructures with high antimicrobial efficacy are attractive for therapeutic applications against multi-drug-resistant bacteria. Here, we report temperature-responsive nanospheres (TRNs) that are engineered to undergo self-association and agglomeration above a tunable transition temperature (Tt). Temperature-responsive behavior of the nanoparticles is obtained by functionalizing citrate-capped, spherical gold nanoparticles (AuNPs) with elastin-like polypeptides (ELPs). Using protein design principles, we achieve a broad range of attainable Tt values and photothermal conversion efficiencies (η). Two approaches were used to adjust this range: First, by altering the position of the cysteine residue used to attach ELP to the AuNP, we attained a Tt range from 34-42 °C. Then, functionalizing the AuNP with an additional small globular protein, we were able to extend this range to 34-50 °C. Under near-infrared (NIR) light exposure, all TRNs exhibited reversible agglomeration. Moreover, they showed enhanced photothermal conversion efficiency in their agglomerated state relative to the dispersed state. Despite their spherical shape, TRNs have a photothermal conversion efficiency approaching that of gold nanorods (η = 68±6%), yet unlike nanorods, the synthesis of TRNs requires no cytotoxic compounds. Finally, we tested TRNs for photothermal ablation of biofilms. Above Tt, NIR irradiation of TRNs resulted in a 10,000-fold improvement in killing efficiency compared to untreated controls (p < 0.0001). Below Tt, no enhanced anti-biofilm effect was observed. In conclusion, engineering the interactions between proteins and nanoparticles enables the tunable control of TRNs, resulting in a novel, anti-biofilm nanomaterial with low cytotoxicity.
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Affiliation(s)
| | | | - Madison A. Hejny
- Department of Chemistry, Mississippi State University, Mississippi State, MS
| | - Veeresh B. Torgall
- Department of Biomedical Engineering, University of Mississippi, University, MS
| | - Thomas A. Werfel
- Department of Biomedical Engineering, University of Mississippi, University, MS
- Department of Chemical Engineering, University of Mississippi, University, MS
- Department of BioMolecular Sciences, University of Mississippi, University, MS
- Cancer Center and Research Institute, University of Mississippi Medical Center, Jackson, MS
| | - Nicholas C. Fitzkee
- Department of Chemistry, Mississippi State University, Mississippi State, MS
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9
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Somarathne RP, Amarasekara DL, Kariyawasam CS, Robertson HA, Mayatt R, Fitzkee NC. Protein Binding Leads to Reduced Stability and Solvated Disorder in the Polystyrene Nanoparticle Corona. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.06.548033. [PMID: 37461509 PMCID: PMC10350082 DOI: 10.1101/2023.07.06.548033] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
Understanding the conformation of proteins in the nanoparticle corona has important implications in how organisms respond to nanoparticle-based drugs. These proteins coat the nanoparticle surface, and their properties will influence the nanoparticle's interaction with cell targets and the immune system. While some coronas are thought to be disordered, two key unanswered questions are the degree of disorder and solvent accessibility. Here, using a comprehensive thermodynamic approach, along with supporting spectroscopic experiments, we develop a model for protein corona disorder in polystyrene nanoparticles of varying size. For two different proteins, we find that binding affinity decreases as nanoparticle size increases. The stoichiometry of binding, along with changes in the hydrodynamic size, support a highly solvated, disordered protein corona anchored at a small number of enthalpically-driven attachment sites. The scaling of the stoichiometry vs. nanoparticle size is consistent disordered polymer dimensions. Moreover, we find that proteins are destabilized less severely in the presence of larger nanoparticles, and this is supported by measurements of hydrophobic exposure, which becomes less pronounced at lower curvatures. Our observations hold for flat polystyrene surfaces, which, when controlled for total surface area, have the lowest hydrophobic exposure of all systems. Our model provides an explanation for previous observations of increased amyloid fibrillation rates in the presence of larger nanoparticles, and it may rationalize how cell receptors can recognize protein disorder in therapeutic nanoparticles.
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Affiliation(s)
- Radha P. Somarathne
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762 USA
| | | | | | - Harley A. Robertson
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762 USA
| | - Railey Mayatt
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762 USA
| | - Nicholas C. Fitzkee
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762 USA
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10
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Bashiri G, Padilla MS, Swingle KL, Shepherd SJ, Mitchell MJ, Wang K. Nanoparticle protein corona: from structure and function to therapeutic targeting. LAB ON A CHIP 2023; 23:1432-1466. [PMID: 36655824 PMCID: PMC10013352 DOI: 10.1039/d2lc00799a] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 11/29/2022] [Indexed: 05/31/2023]
Abstract
Nanoparticle (NP)-based therapeutics have ushered in a new era in translational medicine. However, despite the clinical success of NP technology, it is not well-understood how NPs fundamentally change in biological environments. When introduced into physiological fluids, NPs are coated by proteins, forming a protein corona (PC). The PC has the potential to endow NPs with a new identity and alter their bioactivity, stability, and destination. Additionally, the conformation of proteins is sensitive to their physical and chemical surroundings. Therefore, biological factors and protein-NP-interactions can induce changes in the conformation and orientation of proteins in vivo. Since the function of a protein is closely connected to its folded structure, slight differences in the surrounding environment as well as the surface characteristics of the NP materials may cause proteins to lose or gain a function. As a result, this can alter the downstream functionality of the NPs. This review introduces the main biological factors affecting the conformation of proteins associated with the PC. Then, four types of NPs with extensive utility in biomedical applications are described in greater detail, focusing on the conformation and orientation of adsorbed proteins. This is followed by a discussion on the instances in which the conformation of adsorbed proteins can be leveraged for therapeutic purposes, such as controlling protein conformation in assembled matrices in tissue, as well as controlling the PC conformation for modulating immune responses. The review concludes with a perspective on the remaining challenges and unexplored areas at the interface of PC and NP research.
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Affiliation(s)
- Ghazal Bashiri
- Department of Bioengineering, Temple University, Philadelphia, PA 19122, USA.
| | - Marshall S Padilla
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Kelsey L Swingle
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sarah J Shepherd
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Michael J Mitchell
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
- Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Cardiovascular Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
- Institute for Regenerative Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Karin Wang
- Department of Bioengineering, Temple University, Philadelphia, PA 19122, USA.
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11
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Handali PR, Webb LJ. Gold Nanoparticles Are an Immobilization Platform for Active and Stable Acetylcholinesterase: Demonstration of a General Surface Protein Functionalization Strategy. ACS APPLIED BIO MATERIALS 2023; 6:209-217. [PMID: 36508683 DOI: 10.1021/acsabm.2c00834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Immobilizing enzymes onto abiological surfaces is a key step for developing protein-based technologies that can be useful for applications such as biosensors and biofuel cells. A central impediment for the advancement of this effort is a lack of generalizable strategies for functionalizing surfaces with proteins in ways that prevent unfolding, aggregation, and uncontrolled binding, requiring surface chemistries to be developed for each surface-enzyme pair of interest. In this work, we demonstrate a significant advancement toward addressing this problem using a gold nanoparticle (AuNP) as an initial scaffold for the chemical bonding of the enzyme acetylcholinesterase (AChE), forming the conjugate AuNP-AChE. This can then be placed onto chemically and structurally distinct surfaces (e.g., metals, semiconductors, plastics, etc.), thereby bypassing the need to develop surface functionalization strategies for every substrate or condition of interest. Carbodiimide crosslinker chemistry was used to bind surface lysine residues in AChE to AuNPs functionalized with ligands containing carboxylic acid tails. Using amino acid analysis, we found that on average, 3.3 ± 0.1 AChE proteins were bound per 5.22 ± 1.25 nm AuNP. We used circular dichroism spectroscopy to measure the structure of the bound protein and determined that it remained essentially unchanged after binding. Finally, we performed Michaelis-Menten kinetics to determine that the enzyme retained 18.2 ± 2.0% of its activity and maintained that activity over a period of at least three weeks after conjugation to AuNPs. We hypothesize that structural changes to the peripheral active site of AChE are responsible for the differences in activity of bound AChE and unbound AChE. This work is a proof-of-concept demonstration of a generalizable method for placing proteins onto chemically and structurally diverse substrates and materials without the need for surface functionalization strategies.
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Affiliation(s)
- Paul R Handali
- The University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Lauren J Webb
- Department of Chemistry, Texas Materials Institute, and Interdisciplinary Life Sciences Program, The University of Texas at Austin, 105 E 24th St. STOP A5300, Austin, Texas 78712-1224, United States
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12
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Xu JX, Alom MS, Yadav R, Fitzkee NC. Predicting protein function and orientation on a gold nanoparticle surface using a residue-based affinity scale. Nat Commun 2022; 13:7313. [PMID: 36437251 PMCID: PMC9701677 DOI: 10.1038/s41467-022-34749-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 11/07/2022] [Indexed: 11/28/2022] Open
Abstract
The orientation adopted by proteins on nanoparticle surfaces determines the nanoparticle's bioactivity and its interactions with living systems. Here, we present a residue-based affinity scale for predicting protein orientation on citrate-gold nanoparticles (AuNPs). Competitive binding between protein variants accounts for thermodynamic and kinetic aspects of adsorption in this scale. For hydrophobic residues, the steric considerations dominate, whereas electrostatic interactions are critical for hydrophilic residues. The scale rationalizes the well-defined binding orientation of the small GB3 protein, and it subsequently predicts the orientation and active site accessibility of two enzymes on AuNPs. Additionally, our approach accounts for the AuNP-bound activity of five out of six additional enzymes from the literature. The model developed here enables high-throughput predictions of protein behavior on nanoparticles, and it enhances our understanding of protein orientation in the biomolecular corona, which should greatly enhance the performance and safety of nanomedicines used in vivo.
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Affiliation(s)
- Joanna Xiuzhu Xu
- grid.260120.70000 0001 0816 8287Department of Chemistry, Mississippi State University, Mississippi State, MS 39762 USA
| | - Md. Siddik Alom
- grid.260120.70000 0001 0816 8287Department of Chemistry, Mississippi State University, Mississippi State, MS 39762 USA
| | - Rahul Yadav
- grid.260120.70000 0001 0816 8287Department of Chemistry, Mississippi State University, Mississippi State, MS 39762 USA
| | - Nicholas C. Fitzkee
- grid.260120.70000 0001 0816 8287Department of Chemistry, Mississippi State University, Mississippi State, MS 39762 USA
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13
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Riley MB, Strandquist E, Weitzel CS, Driskell JD. Structure and activity of native and thiolated α-chymotrypsin adsorbed onto gold nanoparticles. Colloids Surf B Biointerfaces 2022; 220:112867. [PMID: 36182820 DOI: 10.1016/j.colsurfb.2022.112867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 11/16/2022]
Abstract
A detailed understanding of protein-nanoparticle interactions is critical to realize the full potential of bioconjugate-enabled technologies. Parameters that lead to conformational changes in protein structure upon adsorption must be identified and controlled to mitigate loss of biological function. We hypothesized that the installation of thiol functional groups on a protein will facilitate robust adsorption to gold nanoparticles (AuNPs) and prevent protein unfolding to achieve thermodynamic stability. Here we investigated the adsorption behavior of α-chymotrypsin (ChT) and a thiolated analog of α-chymotrypsin (T-ChT) with AuNPs. ChT, which does not present any free thiols, was modified with 2-iminothiolane (Traut's reagent) to synthesize T-ChT consisting of two free thiols. Protein adsorption to AuNPs was monitored with dynamic light scattering and UV-vis spectrophotometry, and fluorescence spectra were acquired to assess changes in protein structure induced by interaction with the AuNP. The biological function of ChT, T-ChT, and respective bioconjugates were compared using a colorimetric enzymatic assay. The thiolated analog exhibited a greater affinity for the AuNP than the unmodified ChT, as determined from adsorption isotherms. The ChT protein formed a soft protein corona in which the enzyme denatures with prolonged exposure to AuNPs and, subsequently, lost enzymatic function. Conversely, the T-ChT formed a robust hard corona on the AuNP and retained structure and function. These data support the hypothesis, provide further insight into protein-AuNP interactions, and identify a simple chemical approach to synthesize robust and functional conjugates.
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Affiliation(s)
- McKenzie B Riley
- Department of Chemistry, Illinois State University, Normal, IL 61790, United States
| | - Evan Strandquist
- Department of Chemistry, Illinois State University, Normal, IL 61790, United States
| | | | - Jeremy D Driskell
- Department of Chemistry, Illinois State University, Normal, IL 61790, United States.
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14
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“Soft Protein Corona” as the Stabilizer of the Methionine-Coated Silver Nanoparticles in the Physiological Environment: Insights into the Mechanism of the Interaction. Int J Mol Sci 2022; 23:ijms23168985. [PMID: 36012248 PMCID: PMC9409063 DOI: 10.3390/ijms23168985] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 08/08/2022] [Accepted: 08/10/2022] [Indexed: 11/17/2022] Open
Abstract
The study of the interactions between nanoparticles (NPs) and proteins has had a pivotal role in facilitating the understanding of biological effects and safe application of NPs after exposure to the physiological environment. Herein, for the first time, the interaction between L-methionine capped silver nanoparticles (AgMet), and bovine serum albumin (BSA) is investigated in order to predict the fate of AgMet after its contact with the most abundant blood transport protein. The detailed insights into the mechanism of interaction were achieved using different physicochemical techniques. The UV/Vis, TEM, and DLS were used for the characterization of the newly formed “entity”, while the kinetic and thermodynamic parameters were utilized to describe the adsorption process. Additionally, the fluorescence quenching and synchronous fluorescence studies enabled the prediction of the binding affinity and gave us insight into the influence of the adsorption on the conformation state of the BSA. According to the best of our knowledge, for the first time, we show that BSA can be used as an external stabilizer agent which is able to induce the peptization of previously agglomerated AgMet. We believe that the obtained results could contribute to further improvement of AgNPs’ performances as well as to the understanding of their in vivo behavior, which could contribute to their potential use in preclinical research studies.
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15
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Latreille PL, Le Goas M, Salimi S, Robert J, De Crescenzo G, Boffito DC, Martinez VA, Hildgen P, Banquy X. Scratching the Surface of the Protein Corona: Challenging Measurements and Controversies. ACS NANO 2022; 16:1689-1707. [PMID: 35138808 DOI: 10.1021/acsnano.1c05901] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This Review aims to provide a systematic analysis of the literature regarding ongoing debates in protein corona research. Our goal is to portray the current understanding of two fundamental and debated characteristics of the protein corona, namely, the formation of mono- or multilayers of proteins and their binding (ir)reversibility. The statistical analysis we perform reveals that these characterisitics are strongly correlated to some physicochemical factors of the NP-protein system (particle size, bulk material, protein type), whereas the technique of investigation or the type of measurement (in situ or ex situ) do not impact the results, unlike commonly assumed. Regarding the binding reversibility, the experimental design (either dilution or competition experiments) is also shown to be a key factor, probably due to nontrivial protein binding mechanisms, which could explain the paradoxical phenomena reported in the literature. Overall, we suggest that to truly predict and control the protein corona, future efforts should be directed toward the mechanistic aspects of protein adsorption.
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Affiliation(s)
- Pierre-Luc Latreille
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada
| | - Marine Le Goas
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada
| | - Sina Salimi
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada
| | - Jordan Robert
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada
| | - Gregory De Crescenzo
- Department of Chemical Engineering, Polytechnique Montréal, Montreal H3C 3A7, Canada
| | - Daria C Boffito
- Department of Chemical Engineering, Polytechnique Montréal, Montreal H3C 3A7, Canada
| | - Vincent A Martinez
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, U.K
| | - Patrice Hildgen
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada
| | - Xavier Banquy
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada
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16
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Dar AI, Abidi SMS, Randhawa S, Joshi R, Kumar R, Acharya A. Protein-Cloaked Nanoparticles for Enhanced Cellular Association and Controlled Pathophysiology via Immunosurveillance Escape. ACS APPLIED MATERIALS & INTERFACES 2022; 14:337-349. [PMID: 34969244 DOI: 10.1021/acsami.1c20719] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Weak interactions play an important role in soft corona (SC) formation and thus help in evaluating the biological fate of the nanoparticles (NPs). Preadsorption of specific proteins on the NP surface, leading to SC formation, has been found to help NPs in evading immunosurveillance. However, the role of different preadsorbed biomolecules in determining the NP pathophysiology and cellular association, upon their re-exposure to in vivo conditions, still remains elusive. Here, differently charged gold NPs were precoated with two different blood components, viz. red blood cells and human serum albumin protein, and these were then re-exposed to human serum. Cloaking NPs with protein improved the NP colloidal stability and other physico-chemical properties along with increased cellular association. Detailed proteomic analysis suggested that protein-camouflaged NPs showed a decrease in immune-responsive proteins compared to their bare counterparts. Further, it was also observed that the secondary protein signature on the NP surface was governed by primary protein coating; however, the event was more or less NP charge-independent. This study will pave the path for future strategies to make NPs invincible to the immunosurveillance system of the body.
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Affiliation(s)
- Aqib Iqbal Dar
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Syed M S Abidi
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shiwani Randhawa
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Robin Joshi
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rajiv Kumar
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Amitabha Acharya
- Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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17
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Nanda A, Nasker SS, Kushwaha AK, Ojha DK, Dearden AK, Nayak SK, Nayak S. Gold Nanoparticles Augment N-Terminal Cleavage and Splicing Reactions in Mycobacterium tuberculosis SufB. Front Bioeng Biotechnol 2021; 9:773303. [PMID: 35004641 PMCID: PMC8735848 DOI: 10.3389/fbioe.2021.773303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 11/12/2021] [Indexed: 11/13/2022] Open
Abstract
Protein splicing is a self-catalyzed event where the intervening sequence intein cleaves off, joining the flanking exteins together to generate a functional protein. Attempts have been made to regulate the splicing rate through variations in temperature, pH, and metals. Although metal-regulated protein splicing has been more captivating to researchers, metals were shown to only inhibit splicing reactions that confine their application. This is the first study to show the effect of nanoparticles (NPs) on protein splicing. We found that gold nanoparticles (AuNPs) of various sizes can increase the splicing efficiency by more than 50% and the N-terminal cleavage efficiency by more than 45% in Mycobacterium tuberculosis SufB precursor protein. This study provides an effective strategy for engineering splicing-enhanced intein platforms. UV-vis absorption spectroscopy, isothermal titration calorimetry (ITC), and transmission electron microscopy (TEM) confirmed AuNP interaction with the native protein. Quantum mechanics/molecular mechanics (QM/MM) analysis suggested a significant reduction in the energy barrier at the N-terminal cleavage site in the presence of gold atom, strengthening our experimental evidence on heightened the N-terminal cleavage reaction. The encouraging observation of enhanced N-terminal cleavage and splicing reaction can have potential implementations from developing a rapid drug delivery system to designing a contemporary protein purification system.
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Affiliation(s)
- Ananya Nanda
- School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, India
| | - Sourya Subhra Nasker
- School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, India
| | - Anoop K. Kushwaha
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar, India
| | - Deepak Kumar Ojha
- School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, India
| | - Albert K. Dearden
- Departments of Physics and Astronomy, College of Arts and Sciences, University of South Carolina, Columbia, SC, United States
| | - Saroj K. Nayak
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar, India
| | - Sasmita Nayak
- School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, India
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18
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Mishra A, Mishra K, Bose D, Chakrabarti A, Das PK. Thermodynamics of adsorption of alcohol dehydrogenase on the gold nanoparticle surface: a model based analysis versus direct measurement. Phys Chem Chem Phys 2021; 23:24365-24376. [PMID: 34676852 DOI: 10.1039/d1cp03897d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Characterization of the nanoparticle protein corona has gained tremendous importance lately. The parameters which quantitatively establish a specific nanoparticle-protein interaction need to be measured accurately since good quality data are necessary for the elucidation of the underlying mechanism and accurate molecular dynamics simulation. Here, we have employed surface sensitive second harmonic light scattering (SHLS) for investigating the adsorption of a tetrameric protein, alcohol dehydrogenase (ADH, Saccharomyces cerevisiae 147 kDa), on 16 nm, 27 nm, 41 nm, and 69 nm citrate capped gold nanoparticles (GNPs) in aqueous phosphate buffer at pH 7. We have extracted the binding constant, number of ADH bound per GNP, Gibbs free energy (ΔG°) from the decay of the second harmonic scattered signal as a function of protein concentration using a modified version of the Langmuir adsorption isotherm. The data obtained were checked with another technique, dynamic light scattering, using the same modified Langmuir model (MLM). While the binding constants measured by the two methods are in agreement, the number of ADH bound to each GNP obtained by the two methods varies a lot. In order to further probe this binding independent of a model fitting, we used an orthogonal fluorescence assay which measures the number of ADH bound to a GNP directly, and no model-fitting is necessary. We then used temperature dependent SHLS to measure the heat of adsorption (ΔH°) and entropy (ΔS°) for ADH-GNP corona formation. We found that the equilibrium binding constant (Kb) obtained from SHLS is of the order of 109 M-1 and the formation of the GNP-ADH corona is spontaneous with ΔG° ∼ -55 kJ mol-1. However, the adsorption is modestly endothermic, accompanied by a large increase in entropy. Stated differently, GNP-ADH corona formation is entropically driven. This is perhaps due to the tremendous disruption of the water structure at the negatively charged interface upon the arrival of the protein within the bonding distance to it. We believe that the SHLS technique is highly sensitive and reliable, at very low concentrations of both nanoparticles and proteins, for the quantitative estimation of the thermodynamic parameters of nanoparticle-protein corona formation, where many other techniques may fall short.
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Affiliation(s)
- Akriti Mishra
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
| | - Kamini Mishra
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
| | - Dipayan Bose
- Crystallography & Molecular Biology Div., Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Abhijit Chakrabarti
- Crystallography & Molecular Biology Div., Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Puspendu K Das
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
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19
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Understanding the Adsorption of Peptides and Proteins onto PEGylated Gold Nanoparticles. Molecules 2021; 26:molecules26195788. [PMID: 34641335 PMCID: PMC8510204 DOI: 10.3390/molecules26195788] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/18/2021] [Accepted: 09/20/2021] [Indexed: 11/25/2022] Open
Abstract
Polyethylene glycol (PEG) surface conjugations are widely employed to render passivating properties to nanoparticles in biological applications. The benefits of surface passivation by PEG are reduced protein adsorption, diminished non-specific interactions, and improvement in pharmacokinetics. However, the limitations of PEG passivation remain an active area of research, and recent examples from the literature demonstrate how PEG passivation can fail. Here, we study the adsorption amount of biomolecules to PEGylated gold nanoparticles (AuNPs), focusing on how different protein properties influence binding. The AuNPs are PEGylated with three different sizes of conjugated PEG chains, and we examine interactions with proteins of different sizes, charges, and surface cysteine content. The experiments are carried out in vitro at physiologically relevant timescales to obtain the adsorption amounts and rates of each biomolecule on AuNP-PEGs of varying compositions. Our findings are relevant in understanding how protein size and the surface cysteine content affect binding, and our work reveals that cysteine residues can dramatically increase adsorption rates on PEGylated AuNPs. Moreover, shorter chain PEG molecules passivate the AuNP surface more effectively against all protein types.
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20
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Xu JX, Alom MS, Fitzkee NC. Quantitative Measurement of Multiprotein Nanoparticle Interactions Using NMR Spectroscopy. Anal Chem 2021; 93:11982-11990. [PMID: 34432422 DOI: 10.1021/acs.analchem.1c01911] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An effective intensity-based reference is a cornerstone for quantitative nuclear magnetic resonance (NMR) studies, as the molecular concentration is encoded in its signal. In theory, NMR is well suited for the measurement of competitive protein adsorption onto nanoparticle (NP) surfaces, but current referencing systems are not optimized for multidimensional experiments. Presented herein is a simple and novel referencing system using 15N tryptophan (Trp) as an external reference for 1H-15N 2D NMR experiments. The referencing system is validated by the determination of the binding capacity of a single protein onto gold NPs. Then, the Trp reference is applied to protein mixtures, and signals from each protein are accurately quantified. All results are consistent with previous studies, but with substantially higher precision, indicating that the Trp reference can accurately calibrate the residue peak intensities and reduce systematic errors. Finally, the proposed Trp reference is used to kinetically monitor in situ and in real time the competitive adsorption of different proteins. As a challenging test case, we successfully apply our approach to a mixture of protein variants differing by only a single residue. Our results show that the binding of one protein will affect the binding of the other, leading to an altered NP corona composition. This work therefore highlights the importance of studying protein-NP interactions in protein mixtures in situ, and the referencing system developed here enables the quantification of binding kinetics and thermodynamics of multiple proteins using various 1H-15N 2D NMR techniques.
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Affiliation(s)
- Joanna Xiuzhu Xu
- Department of Chemistry, Mississippi State University, Starkville, Mississippi 39762, United States
| | - Md Siddik Alom
- Department of Chemistry, Mississippi State University, Starkville, Mississippi 39762, United States
| | - Nicholas C Fitzkee
- Department of Chemistry, Mississippi State University, Starkville, Mississippi 39762, United States
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21
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Somarathne RP, Chappell ER, Perera YR, Yadav R, Park JY, Fitzkee NC. Understanding How Staphylococcal Autolysin Domains Interact With Polystyrene Surfaces. Front Microbiol 2021; 12:658373. [PMID: 34093472 PMCID: PMC8170090 DOI: 10.3389/fmicb.2021.658373] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 04/19/2021] [Indexed: 01/04/2023] Open
Abstract
Biofilms, when formed on medical devices, can cause malfunctions and reduce the efficiency of these devices, thus complicating treatments and serving as a source of infection. The autolysin protein of Staphylococcus epidermidis contributes to its biofilm forming ability, especially on polystyrene surfaces. R2ab and amidase are autolysin protein domains thought to have high affinity to polystyrene surfaces, and they are involved in initial bacterial attachment in S. epidermidis biofilm formation. However, the structural details of R2ab and amidase binding to surfaces are poorly understood. In this study, we have investigated how R2ab and amidase influence biofilm formation on polystyrene surfaces. We have also studied how these proteins interact with polystyrene nanoparticles (PSNPs) using biophysical techniques. Pretreating polystyrene plates with R2ab and amidase domains inhibits biofilm growth relative to a control protein, indicating that these domains bind tightly to polystyrene surfaces and can block bacterial attachment. Correspondingly, we find that both domains interact strongly with anionic, carboxylate-functionalized as well as neutral, non-functionalized PSNPs, suggesting a similar binding interaction for nanoparticles and macroscopic surfaces. Both anionic and neutral PSNPs induce changes to the secondary structure of both R2ab and amidase as monitored by circular dichroism (CD) spectroscopy. These changes are very similar, though not identical, for both types of PSNPs, suggesting that carboxylate functionalization is only a small perturbation for R2ab and amidase binding. This structural change is also seen in limited proteolysis experiments, which exhibit substantial differences for both proteins when in the presence of carboxylate PSNPs. Overall, our results demonstrate that the R2ab and amidase domains strongly favor adsorption to polystyrene surfaces, and that surface adsorption destabilizes the secondary structure of these domains. Bacterial attachment to polystyrene surfaces during the initial phases of biofilm formation, therefore, may be mediated by aromatic residues, since these residues are known to drive adsorption to PSNPs. Together, these experiments can be used to develop new strategies for biofilm eradication, ensuring the proper long-lived functioning of medical devices.
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Affiliation(s)
- Radha P. Somarathne
- Department of Chemistry, Mississippi State University, Mississippi State, MS, United States
| | - Emily R. Chappell
- Department of Chemistry, Mississippi State University, Mississippi State, MS, United States
| | - Y. Randika Perera
- Department of Biochemistry, Chemistry, and Center for Structural Biology, Vanderbilt University, Nashville, TN, United States
| | - Rahul Yadav
- Department of Chemistry, Mississippi State University, Mississippi State, MS, United States
| | - Joo Youn Park
- Department of Comparative Biomedical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, United States
| | - Nicholas C. Fitzkee
- Department of Chemistry, Mississippi State University, Mississippi State, MS, United States
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22
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Xu H, Casabianca LB. Dual Fluorescence and NMR Study for the Interaction between Xanthene Dyes and Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:385-390. [PMID: 33356333 DOI: 10.1021/acs.langmuir.0c03020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Fluorescent dyes and nanoparticles (NPs) have been widely used together to make novel biosensors, taking advantage of their unique characteristics. It is crucial to have techniques that enable us to gain detailed and high-resolution information regarding the interaction between NPs and fluorescent dyes. In this work, we chose rhodamine B (RhB) and amidine- and carboxylate-modified polystyrene (CML) NPs as models and employed both NMR (1H and STD-NMR) and optical (UV-vis and fluorescence) techniques to investigate the interaction between NPs and fluorescent dyes. From UV-vis and fluorescence spectroscopy, we see that there are larger red shifts when rhodamine B binds to carboxylate-modified polystyrene NPs than amidine-modified NPs. Correspondingly, RhB has broader NMR peaks and a larger STD effect when binding to CML NPs than amidine NPs. Results from these two techniques validate each other. It is notable that the NMR techniques provide more reliable data than UV-vis and fluorescence methods. Moreover, we show that NMR techniques, especially STD-NMR, can provide more atomic-level binding geometry information. The higher STD effect of the smaller aromatic ring of RhB implies that this aromatic ring is closer to the surface of NPs when binding to polystyrene NPs.
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Affiliation(s)
- Hui Xu
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
| | - Leah Beck Casabianca
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
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Nakhjiri MZ, Asadi S, Hasan A, Babadaei MMN, Vahdani Y, Rasti B, Ale-Ebrahim M, Arsalan N, Goorabjavari SVM, Haghighat S, Sharifi M, Shahpasand K, Akhtari K, Falahati M. Exploring the interaction of synthesized nickel oxide nanoparticles through hydrothermal method with hemoglobin and lymphocytes: Bio-thermodynamic and cellular studies. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113893] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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24
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Ranoszek-Soliwoda K, Czechowska E, Tomaszewska E, Pudlarz A, Szemraj J, Celichowski G, Grobelny J. Differences in corona formation of catalase immobilised on gold and silver nanoparticles. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Park SJ. Protein-Nanoparticle Interaction: Corona Formation and Conformational Changes in Proteins on Nanoparticles. Int J Nanomedicine 2020; 15:5783-5802. [PMID: 32821101 PMCID: PMC7418457 DOI: 10.2147/ijn.s254808] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 05/21/2020] [Indexed: 12/11/2022] Open
Abstract
Nanoparticles (NPs) are highly potent tools for the diagnosis of diseases and specific delivery of therapeutic agents. Their development and application are scientifically and industrially important. The engineering of NPs and the modulation of their in vivo behavior have been extensively studied, and significant achievements have been made in the past decades. However, in vivo applications of NPs are often limited by several difficulties, including inflammatory responses and cellular toxicity, unexpected distribution and clearance from the body, and insufficient delivery to a specific target. These unfavorable phenomena may largely be related to the in vivo protein-NP interaction, termed "protein corona." The layer of adsorbed proteins on the surface of NPs affects the biological behavior of NPs and changes their functionality, occasionally resulting in loss-of-function or gain-of-function. The formation of a protein corona is an intricate process involving complex kinetics and dynamics between the two interacting entities. Structural changes in corona proteins have been reported in many cases after their adsorption on the surfaces of NPs that strongly influence the functions of NPs. Thus, understanding of the conformational changes and unfolding process of proteins is very important to accelerate the biomedical applications of NPs. Here, we describe several protein corona characteristics and specifically focus on the conformational fluctuations in corona proteins induced by NPs.
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Affiliation(s)
- Sung Jean Park
- College of Pharmacy and Gachon Institute of Pharmaceutical Sciences, Gachon University, Incheon21936, Korea
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26
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Luo L, Liu YY, Gao T, Wang X, Chen J, Wang H, Liu Y, Cao A. Characterization of the Specific Interactions between Nanoparticles and Proteins at Residue-Resolution by Alanine Scanning Mutagenesis. ACS APPLIED MATERIALS & INTERFACES 2020; 12:34514-34523. [PMID: 32672033 DOI: 10.1021/acsami.0c05994] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The interaction between nanoparticles and proteins is a central problem in the nano-bio-fields. However, it is still a great challenge to characterize the specific interaction between nanoparticles and proteins in structural details. Using the Goldbodies, the artificial antibodies created by grafting complementary-determining regions (CDRs) of natural antibodies onto gold nanoparticles, as the models, we manage to identify the key residues of the CDR peptides on gold nanoparticles for the specific interactions by alanine scanning mutagenesis. Each and every residue of the CDR peptides on two Goldbodies (which specifically bind with hen egg white lysozyme and epidermal growth factor receptor, respectively) is mutated to alanine one by one, generating a total of 18 single-mutants of the two Goldbodies. Experimental results reveal that the key residues of the CDR peptides for the specific interactions between the two Goldbodies and the corresponding antigens are exactly the same as those in the natural antibodies, thus proving that the correct conformations of the CDRs of natural antibodies have been successfully reconstructed on AuNPs. This is the first residue-resolution structural illustration for the specific interaction between a designed nanoparticle and a protein.
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Affiliation(s)
- Lei Luo
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Yuan-Yuan Liu
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Tiange Gao
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Xinping Wang
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Jingqi Chen
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Haifang Wang
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
| | - Yuanfang Liu
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Aoneng Cao
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, China
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27
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Duan Y, Wu W, Zhao Q, Liu S, Liu H, Huang M, Wang T, Liang M, Wang Z. Enzyme-Antibody-Modified Gold Nanoparticle Probes for the Ultrasensitive Detection of Nucleocapsid Protein in SFTSV. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17124427. [PMID: 32575570 PMCID: PMC7344430 DOI: 10.3390/ijerph17124427] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/11/2020] [Accepted: 06/16/2020] [Indexed: 12/22/2022]
Abstract
As humans and climate change continue to alter the landscape, novel disease risk scenarios have emerged. Sever fever with thrombocytopenia syndrome (SFTS), an emerging tick-borne infectious disease first discovered in rural areas of central China in 2009, is caused by a novel bunyavirus (SFTSV). The potential for SFTS to spread to other countries in combination with its high fatality rate, possible human-to-human transmission, and extensive prevalence among residents and domesticated animals in endemic regions make the disease a severe threat to public health. Because of the lack of preventive vaccines or useful antiviral drugs, diagnosis of SFTS is the key to prevention and control of the SFTSV infection. The development of serological detection methods will greatly improve our understanding of SFTSV ecology and host tropism. We describe a highly sensitive protein detection method based on gold nanoparticles (AuNPs) and enzyme-linked immunosorbent assay (ELISA)—AuNP-based ELISA. The optical sensitivity enhancement of this method is due to the high loading efficiency of AuNPs to McAb. This enhances the concentration of the HRP enzyme in each immune sandwich structure. The detection limit of this method to the nucleocapsid protein (NP) of SFTSV was 0.9 pg mL−1 with good specificity and reproducibility. The sensitivity of AuNP-based ELISA was higher than that of traditional ELISA and was comparable to real-time quantitative polymerase chain reaction (qRT-PCR). The probes are stable for 120 days at 4 °C. This can be applied to diagnosis and hopefully can be developed into a commercial ELISA kit. The ultrasensitive detection of SFTSV will increase our understanding of the distribution and spread of SFTSV, thus helping to monitor the changes in tick-borne pathogen SFTSV risk in the environment.
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Affiliation(s)
- Yuqin Duan
- School of Life Sciences, Tianjin University, Tianjin 300072, China; (Y.D.); (Q.Z.); (S.L.); (H.L.); (M.H.); (T.W.)
| | - Wei Wu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100000, China;
| | - Qiuzi Zhao
- School of Life Sciences, Tianjin University, Tianjin 300072, China; (Y.D.); (Q.Z.); (S.L.); (H.L.); (M.H.); (T.W.)
| | - Sihua Liu
- School of Life Sciences, Tianjin University, Tianjin 300072, China; (Y.D.); (Q.Z.); (S.L.); (H.L.); (M.H.); (T.W.)
| | - Hongyun Liu
- School of Life Sciences, Tianjin University, Tianjin 300072, China; (Y.D.); (Q.Z.); (S.L.); (H.L.); (M.H.); (T.W.)
| | - Mengqian Huang
- School of Life Sciences, Tianjin University, Tianjin 300072, China; (Y.D.); (Q.Z.); (S.L.); (H.L.); (M.H.); (T.W.)
| | - Tao Wang
- School of Life Sciences, Tianjin University, Tianjin 300072, China; (Y.D.); (Q.Z.); (S.L.); (H.L.); (M.H.); (T.W.)
| | - Mifang Liang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100000, China;
- Correspondence: (M.L.); (Z.W.)
| | - Zhiyun Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
- Correspondence: (M.L.); (Z.W.)
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28
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Lopes Rodrigues R, Xie F, Porter AE, Ryan MP. Geometry-induced protein reorientation on the spikes of plasmonic gold nanostars. NANOSCALE ADVANCES 2020; 2:1144-1151. [PMID: 36133070 PMCID: PMC9418033 DOI: 10.1039/c9na00584f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 01/06/2020] [Indexed: 05/23/2023]
Abstract
Functionalized gold nanostars (AuStrs) are remarkable candidates for drug delivery, photothermal therapy and imaging due to their large surface area to volume ratio and plasmonic properties. In this study, we address the challenge of achieving therapeutically controlled dosing using these high aspect ratio nanoparticle vectors by tailoring the nanostar loading area and protein conformation. We synthesized a library of different Au nanostars with varied geometries for potential biomedical applications. The Au nanostars were subsequently coated with different amounts of transferrin (Tf) and a novel depletion method was devised to measure the amount of Tf bound to the surface of the nanostructures. This methodology allowed us to show that coating thickness could be controllably varied and moulded onto the nanoparticle's high index features, whilst simultaneously preserving the key properties of the particle. The orientation of the Tf was measured on nanostars and spheres using transmission electron microscopy by negatively staining the Tf. The Tf was conformal on the nanostars, and protein packing efficiency increased on the AuStrs by 14-fold due to a geometry-induced protein reorientation at the nanoparticle surface. Interestingly, the reorientation of the transferrin observed at the AuStrs spikes did not occur at the AuStrs tips thus highlighting surface energy effects associated with surface curvature.
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Affiliation(s)
- Rosália Lopes Rodrigues
- London Centre for Nanotechnology, Department of Materials, Imperial College London Exhibition Road London SW7 2AZ UK
| | - Fang Xie
- London Centre for Nanotechnology, Department of Materials, Imperial College London Exhibition Road London SW7 2AZ UK
| | - Alexandra E Porter
- London Centre for Nanotechnology, Department of Materials, Imperial College London Exhibition Road London SW7 2AZ UK
| | - Mary P Ryan
- London Centre for Nanotechnology, Department of Materials, Imperial College London Exhibition Road London SW7 2AZ UK
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29
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Perera YR, South TM, Hughes AC, Parkhurst AN, Williams OC, Davidson MB, Wilks CA, Mlsna DA, Fitzkee NC. Using NMR Spectroscopy To Measure Protein Binding Capacity on Gold Nanoparticles. JOURNAL OF CHEMICAL EDUCATION 2020; 97:820-824. [PMID: 34045774 PMCID: PMC8152810 DOI: 10.1021/acs.jchemed.9b00625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A simple one-dimensional 1H NMR experiment that quantifies protein bound to gold nanoparticles has been developed for upper-division biochemistry and physical chemistry students. This laboratory experiment teaches the basics of NMR techniques, which is a highly effective tool in protein studies and supports students to understand the concepts of NMR spectroscopy and nanoparticle-protein interactions. Understanding the interactions of gold nanoparticles (AuNPs) with biological macromolecules is becoming increasingly important as interest in the clinical use of nanoparticles has been on the rise. Applications in drug delivery, biosensing, diagnostics, and enhanced imaging are all tangible possibilities with a better understanding of AuNP-protein interactions. The ability to use AuNPs as biosensors for drug delivery methods in cellular uptake is dependent on the amount of protein that is able to bind to the surface of the nanoparticle. This laboratory experiment solidifies concepts such as quantitative NMR spectroscopy while reinforcing precision laboratory titrations. Students learn how 1H proton NMR spectra can be used to measure free protein in solution and protein bound to AuNPs. A simple formula is used to determine the binding capacity of the nanoparticle. This analysis helps students to understand the impact of nanoparticle-protein interactions, and it allows them to conceptualize macromolecular binding using NMR spectroscopy.
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Affiliation(s)
| | - Taylor M South
- Mississippi State University, Mississippi State, Mississippi
| | - Alex C Hughes
- Mississippi State University, Mississippi State, Mississippi
| | | | | | | | - Chloe A Wilks
- Mississippi State University, Mississippi State, Mississippi
| | - Debra A Mlsna
- Mississippi State University, Mississippi State, Mississippi
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30
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Perera YR, Hill RA, Fitzkee NC. Protein Interactions with Nanoparticle Surfaces: Highlighting Solution NMR Techniques. Isr J Chem 2019; 59:962-979. [PMID: 34045771 PMCID: PMC8152826 DOI: 10.1002/ijch.201900080] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 09/02/2019] [Indexed: 12/14/2022]
Abstract
In the last decade, nanoparticles (NPs) have become a key tool in medicine and biotechnology as drug delivery systems, biosensors and diagnostic devices. The composition and surface chemistry of NPs vary based on the materials used: typically organic polymers, inorganic materials, or lipids. Nanoparticle classes can be further divided into sub-categories depending on the surface modification and functionalization. These surface properties matter when NPs are introduced into a physiological environment, as they will influence how nucleic acids, lipids, and proteins will interact with the NP surface. While small-molecule interactions are easily probed using NMR spectroscopy, studying protein-NP interactions using NMR introduces several challenges. For example, globular proteins may have a perturbed conformation when attached to a foreign surface, and the size of NP-protein conjugates can lead to excessive line broadening. Many of these challenges have been addressed, and NMR spectroscopy is becoming a mature technique for in situ analysis of NP binding behavior. It is therefore not surprising that NMR has been applied to NP systems and has been used to study biomolecules on NP surfaces. Important considerations include corona composition, protein behavior, and ligand architecture. These features are difficult to resolve using classical surface and material characterization strategies, and NMR provides a complementary avenue of characterization. In this review, we examine how solution NMR can be combined with other analytical techniques to investigate protein behavior on NP surfaces.
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Affiliation(s)
- Y Randika Perera
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
| | - Rebecca A Hill
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
| | - Nicholas C Fitzkee
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
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31
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Tollefson EJ, Allen CR, Chong G, Zhang X, Rozanov ND, Bautista A, Cerda JJ, Pedersen JA, Murphy CJ, Carlson EE, Hernandez R. Preferential Binding of Cytochrome c to Anionic Ligand-Coated Gold Nanoparticles: A Complementary Computational and Experimental Approach. ACS NANO 2019; 13:6856-6866. [PMID: 31082259 DOI: 10.1021/acsnano.9b01622] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Membrane-bound proteins can play a role in the binding of anionic gold nanoparticles (AuNPs) to model bilayers; however, the mechanism for this binding remains unresolved. In this work, we determine the relative orientation of the peripheral membrane protein cytochrome c in binding to a mercaptopropionic acid-functionalized AuNP (MPA-AuNP). As this is nonrigid binding, traditional methods involving crystallographic or rigid molecular docking techniques are ineffective at resolving the question. Instead, we have implemented a computational assay technique using a cross-correlation of a small ensemble of 200 ns long molecular dynamics trajectories to identify a preferred nonrigid binding orientation or pose of cytochrome c on MPA-AuNPs. We have also employed a mass spectrometry-based footprinting method that enables the characterization of the stable protein corona that forms at long time-scales in solution but remains in a dynamic state. Through the combination of these computational and experimental primary results, we have established a consensus result establishing the identity of the exposed regions of cytochrome c in proximity to MPA-AuNPs and its complementary pose(s) with amino-acid specificity. Moreover, the tandem use of the two methods can be applied broadly to determine the accessibility of membrane-binding sites for peripheral membrane proteins upon adsorption to AuNPs or to determine the exposed amino-acid residues of the hard corona that drive the acquisition of dynamic soft coronas. We anticipate that the combined use of simulation and experimental methods to characterize biomolecule-nanoparticle interactions, as demonstrated here, will become increasingly necessary as the complexity of such target systems grows.
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Affiliation(s)
- Emily J Tollefson
- Department of Chemistry , University of Minnesota-Twin Cities , Minneapolis , Minnesota 55455 , United States
| | - Caley R Allen
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Gene Chong
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Xi Zhang
- Department of Chemistry , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Nikita D Rozanov
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Anthony Bautista
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Jennifer J Cerda
- Department of Chemistry , University of Minnesota-Twin Cities , Minneapolis , Minnesota 55455 , United States
| | - Joel A Pedersen
- Environmental Chemistry and Technology Program , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Catherine J Murphy
- Department of Chemistry , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Erin E Carlson
- Department of Chemistry , University of Minnesota-Twin Cities , Minneapolis , Minnesota 55455 , United States
| | - Rigoberto Hernandez
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
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32
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Athukorale S, Leng X, Xu JX, Perera YR, Fitzkee NC, Zhang D. Surface Plasmon Resonance, Formation Mechanism, and Surface Enhanced Raman Spectroscopy of Ag +-Stained Gold Nanoparticles. Front Chem 2019; 7:27. [PMID: 30838197 PMCID: PMC6382679 DOI: 10.3389/fchem.2019.00027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 01/11/2019] [Indexed: 12/26/2022] Open
Abstract
A series of recent works have demonstrated the spontaneous Ag+ adsorption onto gold surfaces. However, a mechanistic understanding of the Ag+ interactions with gold has been controversial. Reported herein is a systematic study of the Ag+ binding to AuNPs using several in-situ and ex-situ measurement techniques. The time-resolved UV-vis measurements of the AuNP surface plasmonic resonance revealed that the silver adsorption proceeds through two parallel pseudo-first order processes with a time constant of 16(±2) and 1,000(±35) s, respectively. About 95% of the Ag+ adsorption proceeds through the fast adsorption process. The in-situ zeta potential data indicated that this fast Ag+ adsorption is driven primarily by the long-range electrostatic forces that lead to AuNP charge neutralization, while the time-dependent pH data shows that the slow Ag+ binding process involves proton-releasing reactions that must be driven by near-range interactions. These experimental data, together with the ex-situ XPS measurement indicates that adsorbed silver remains cationic, but not as a charged-neutral silver atom proposed by the anti-galvanic reaction mechanism. The surface-enhanced Raman activities of the Ag+-stained AuNPs are slightly higher than that for AuNPs, but significantly lower than that for the silver nanoparticles (AgNPs). The SERS feature of the ligands on the Ag+-stained AuNPs can differ from that on both AuNPs and AgNPs. Besides the new insights to formation mechanism, properties, and applications of the Ag+-stained AuNPs, the experimental methodology presented in this work can also be important for studying nanoparticle interfacial interactions.
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Affiliation(s)
- Sumudu Athukorale
- Department of Chemistry, Mississippi State University, Starkville, MS, United States
| | - Xue Leng
- Department of Chemistry, Chengdu University of Technology, Chengdu, China
| | - Joanna Xiuzhu Xu
- Department of Chemistry, Mississippi State University, Starkville, MS, United States
| | - Y Randika Perera
- Department of Chemistry, Mississippi State University, Starkville, MS, United States
| | - Nicholas C Fitzkee
- Department of Chemistry, Mississippi State University, Starkville, MS, United States
| | - Dongmao Zhang
- Department of Chemistry, Mississippi State University, Starkville, MS, United States.,Department of Chemistry, Xihua University, Chengdu, China
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Berlina AN, Bartosh AV, Sotnikov DV, Zherdev AV, Xu C, Dzantiev BB. Complexes of Gold Nanoparticles with Antibodies in Immunochromatography: Comparison of Direct and Indirect Immobilization of Antibodies for the Detection of Antibiotics. ACTA ACUST UNITED AC 2019. [DOI: 10.1134/s1995078018040031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Sotnikov DV, Berlina AN, Ivanov VS, Zherdev AV, Dzantiev BB. Adsorption of proteins on gold nanoparticles: One or more layers? Colloids Surf B Biointerfaces 2019; 173:557-563. [DOI: 10.1016/j.colsurfb.2018.10.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 10/04/2018] [Accepted: 10/09/2018] [Indexed: 01/10/2023]
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35
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Zhang Y, Xu H, Casabianca LB. Interaction between cyanine dye IR-783 and polystyrene nanoparticles in solution. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2018; 56:1054-1060. [PMID: 29771468 DOI: 10.1002/mrc.4751] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 05/04/2018] [Accepted: 05/08/2018] [Indexed: 06/08/2023]
Abstract
The interactions between small molecule drugs or dyes and nanoparticles are important to the use of nanoparticles in medicine. Noncovalent adsorption of dyes on nanoparticle surfaces is also important to the development of nanoparticle dual-use imaging contrast agents. In this work, solution-state NMR is used to examine the noncovalent interaction between a near-infrared cyanine dye and the surface of polystyrene nanoparticles in solution. Using 1D proton NMR, we can approximate the number of dye molecules that associate with each nanoparticle for different sized nanoparticles. Saturation-Transfer Difference NMR was also used to show that protons near the positively charged nitrogen in the dye are more strongly associated with the negatively charged nanoparticle surface than protons near the negatively charged sulfate groups of the dye. The methods described here can be used to study similar drug or dye molecules interacting with the surface of organic nanoparticles.
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Affiliation(s)
- Yunzhi Zhang
- Department of Chemistry, Clemson University, Clemson, SC, USA
| | - Hui Xu
- Department of Chemistry, Clemson University, Clemson, SC, USA
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36
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Gurtu A, Bakshi MS. Ag Nanometallic Surfaces for Self-Assembled Ordered Morphologies of Zein. ACS OMEGA 2018; 3:10851-10857. [PMID: 31459197 PMCID: PMC6645513 DOI: 10.1021/acsomega.8b02086] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 08/27/2018] [Indexed: 06/09/2023]
Abstract
Nanometallic surfaces of Ag nanoparticles (NPs) catalyzed the self-aggregation behavior of zein in different ordered morphologies such as cubes, rectangles, and bars. This was studied in a ternary in situ reaction (AgNO3 + zein + water), where zein performed the reduction as well as stabilization of Ag NPs. This reaction produced small Ag NPs of less than 10 nm predominantly bound with {111} crystal planes, which attracted the surface adsorption of zein. Surface-adsorbed zein initiated the protein seeding and converted the tertiary structure of protein into open β-pleated structure with aqueous exposed hydrophobic domains. A layered deposition of β-pleats on different crystal planes of Ag NPs derived them to nearly monodispersed cubic morphologies. The mechanistic aspects of self-aggregation of zein in the presence of nanometallic surfaces hold possible scenarios for simple and straightforward routes of protein crystallization.
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37
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Catalase-modified gold nanoparticles: Determination of the degree of protein adsorption by gel electrophoresis. Colloids Surf B Biointerfaces 2017; 159:533-539. [DOI: 10.1016/j.colsurfb.2017.08.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 05/24/2017] [Accepted: 08/12/2017] [Indexed: 11/24/2022]
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38
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Dennison JM, Zupancic JM, Lin W, Dwyer JH, Murphy CJ. Protein Adsorption to Charged Gold Nanospheres as a Function of Protein Deformability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7751-7761. [PMID: 28704605 DOI: 10.1021/acs.langmuir.7b01909] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The corona that forms as protein adsorbs to gold nanospheres (AuNSs) is directly influenced by the surface chemistry of the AuNS. Tools to predict adsorption outcomes are needed for intelligent design of nanomaterials for biological applications. We hypothesized that the denaturation behavior of a protein might be a useful predictor of adsorption behavior to AuNSs, and used this idea to study protein adsorption to anionic citrate-capped AuNSs and to cationic poly(allylamine hydrochloride) (PAH) wrapped AuNSs. Three proteins (α-amylase (A-Amy), β-lactoglobulin (BLG), and bovine serum albumin (BSA)), representing three different classes of acid denaturation behavior, were selected with BLG being the least deformable and BSA being the most deformable. Protein adsorption to AuNSs was monitored via UV-vis spectrophotometry and dynamic light scattering. Changes to the protein structure upon AuNS interaction were monitored via circular dichroism spectroscopy. Binding constants were determined using the Langmuir adsorption isotherm, resulting in BSA > BLG ≫ A-Amy affinities for citrate-capped gold nanospheres. PAH-coated AuNSs displayed little affinity for these proteins at similar concentrations as citrate-coated AuNSs and became agglomerated at high protein concentrations. The enzymatic activity of A-Amy/citrate AuNS conjugates was measured via colorimetric assay, and found to be 11% of free A-Amy, suggesting that binding restricts access to the active site. Across both citrate AuNSs and PAH AuNSs, the changes in secondary structure were greatest for BSA > A-Amy > BLG, which does follow the trends predicted by acid denaturation characteristics.
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Affiliation(s)
- Jordan M Dennison
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jennifer M Zupancic
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Wayne Lin
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jonathan H Dwyer
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Catherine J Murphy
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
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