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Pishesha N, Ingram JR, Ploegh HL. Sortase A: A Model for Transpeptidation and Its Biological Applications. Annu Rev Cell Dev Biol 2018; 34:163-188. [PMID: 30110557 DOI: 10.1146/annurev-cellbio-100617-062527] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Molecular biologists and chemists alike have long sought to modify proteins with substituents that cannot be installed by standard or even advanced genetic approaches. We here describe the use of transpeptidases to achieve these goals. Living systems encode a variety of transpeptidases and peptide ligases that allow for the enzyme-catalyzed formation of peptide bonds, and protein engineers have used directed evolution to enhance these enzymes for biological applications. We focus primarily on the transpeptidase sortase A, which has become popular over the past few years for its ability to perform a remarkably wide variety of protein modifications, both in vitro and in living cells.
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Affiliation(s)
- Novalia Pishesha
- Program in Molecular and Cellular Medicine, Boston Children's Hospital, Boston, Massachusetts 02115, USA; .,Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Jessica R Ingram
- Department of Cancer Immunology and Virology, Dana Farber Cancer Institute, Boston, Massachusetts 02215, USA
| | - Hidde L Ploegh
- Program in Molecular and Cellular Medicine, Boston Children's Hospital, Boston, Massachusetts 02115, USA;
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Pan D, Li G, Hu H, Xue H, Zhang M, Zhu M, Gong X, Zhang Y, Wan Y, Shen Y. Direct Immunoassay for Facile and Sensitive Detection of Small Molecule Aflatoxin B 1 based on Nanobody. Chemistry 2018; 24:9869-9876. [PMID: 29766584 DOI: 10.1002/chem.201801202] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 05/14/2018] [Indexed: 01/07/2023]
Abstract
Aflatoxin B1 (AFB1 ), one of the most toxic mycotoxins, is classified as a group I carcinogen and ubiquitous in various foods and agriproducts. Thus, accurate and sensitive determination of AFB1 is of great significance to meet the criteria of food safety. Direct detection of AFB1 is difficult by monoclonal antibody (mAb) with large molecular size (≈150 kD) since the target is too small to produce a detectable signal change. Herein, by combining the electrochemical properties of nanomaterials and the advantages of nanobodies, we developed a direct, highly selective and sensitive electrochemical immunosensor for small molecule detection. The proposed immunosensor had a wide calibration range of 0.01 to 100 ng mL-1 and a low detection limit of 3.3 pg mL-1 (S/N=3). Compared with the immunosensor prepared with mAb which was applied in the typical indirect immunoassay, the immunosensor in this work possessed two orders of magnitudes wider linear range and 10-fold more sensitivity. The as-obtained immunosensor was further successfully applied for sensing AFB1 in real samples. This proposed assay would provide a simple, highly sensitive and selective approach for the direct immunoassay of small molecule AFB1 , and is extendable to the development of direct immunosensing systems for other small molecules detection by coupling nanocarbon and nanobody.
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Affiliation(s)
- Deng Pan
- Medical School, School of Chemistry and Chemical Engineering, Southeast University, 210009, Nanjing, China
| | - Guanghui Li
- Shanghai Novamab Biopharmaceuticals Co., Ltd., 201203, Shanghai, China
| | - Huizhen Hu
- Medical School, School of Chemistry and Chemical Engineering, Southeast University, 210009, Nanjing, China
| | - Huaijia Xue
- Medical School, School of Chemistry and Chemical Engineering, Southeast University, 210009, Nanjing, China
| | - Mingming Zhang
- Medical School, School of Chemistry and Chemical Engineering, Southeast University, 210009, Nanjing, China
| | - Min Zhu
- Shanghai Novamab Biopharmaceuticals Co., Ltd., 201203, Shanghai, China
| | - Xue Gong
- Medical School, School of Chemistry and Chemical Engineering, Southeast University, 210009, Nanjing, China
| | - Yuanjian Zhang
- Medical School, School of Chemistry and Chemical Engineering, Southeast University, 210009, Nanjing, China
| | - Yakun Wan
- Shanghai Novamab Biopharmaceuticals Co., Ltd., 201203, Shanghai, China
| | - Yanfei Shen
- Medical School, School of Chemistry and Chemical Engineering, Southeast University, 210009, Nanjing, China
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New Members of the National Academy of Sciences: H. Dai, H. L. Ploegh, and M. S. Sanford / Chirality Medal: Andreas Pfaltz / Elected to the Akademie der Wissenschaften zu Göttingen and Award for International Cooperation of the Chinese Academy of Sciences. Angew Chem Int Ed Engl 2016; 55:7889. [DOI: 10.1002/anie.201605263] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Neue Mitglieder der National Academy of Sciences: H. Dai, H. L. Ploegh und M. S. Sanford / Chirality Medal: Andreas Pfaltz / In die Akademie der Wissenschaften zu Göttingen gewählt und Preis für internationale Zusammenarbeit der chinesischen Akademie der. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605263] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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