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Yang X, Feng Y, Chong H, Wang D, Hu X, Pu J, Zhan CG, Liao F. High-throughput estimation of specific activities of enzyme/mutants in cell lysates through immunoturbidimetric assay of proteins. Anal Biochem 2017; 534:91-98. [DOI: 10.1016/j.ab.2017.05.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 05/14/2017] [Indexed: 01/02/2023]
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Feng Y, Yang X, Wang D, Hu X, Chong H, Liao J, Zhan CG, Liao F. Polyclonal Antibodies in Microplates to Predict the Maximum Adsorption Activities of Enzyme/Mutants from Cell Lysates. Protein J 2017; 36:212-219. [DOI: 10.1007/s10930-017-9716-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Yuan M, Yang X, Li Y, Liu H, Pu J, Zhan CG, Liao F. Facile Alkaline Lysis of Escherichia coli Cells in High-Throughput Mode for Screening Enzyme Mutants: Arylsulfatase as an Example. Appl Biochem Biotechnol 2016; 179:545-57. [DOI: 10.1007/s12010-016-2012-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 02/08/2016] [Indexed: 12/14/2022]
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Feng J, Wang L, Liu H, Yang X, Liu L, Xie Y, Liu M, Zhao Y, Li X, Wang D, Zhan C, Liao F. Crystal structure of Bacillus fastidious uricase reveals an unexpected folding of the C-terminus residues crucial for thermostability under physiological conditions. Appl Microbiol Biotechnol 2015; 99:7973-86. [DOI: 10.1007/s00253-015-6520-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 02/22/2015] [Accepted: 03/02/2015] [Indexed: 10/23/2022]
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Li Y, Long G, Yang X, Hu X, Feng Y, Tan D, Xie Y, Pu J, Liao F. Approximated maximum adsorption of His-tagged enzyme/mutants on Ni2+-NTA for comparison of specific activities. Int J Biol Macromol 2014; 74:211-7. [PMID: 25542175 DOI: 10.1016/j.ijbiomac.2014.12.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 12/02/2014] [Accepted: 12/03/2014] [Indexed: 11/17/2022]
Abstract
By approximating maximum activities of six-histidine (6His)-tagged enzyme/mutants adsorbed on Ni2+-NTA-magnetic-submicron-particle (Ni2+-NTA-MSP), a facile approach was tested for comparing enzyme specific activities in cell lysates. On a fixed quantity of Ni2+-NTA-MSP, the activity of an adsorbed 6His-tagged enzyme/mutant was measured via spectrophotometry; the activity after saturation adsorption (Vs) was predicted from response curve with quantities of total proteins from the same lysate as the predictor; Vs was equivalent of specific activity for comparison. This approach required abundance of a 6His-tagged enzyme/mutant over 3% among total proteins in lysate, an accurate series of quantities of total proteins from the same lysate, the largest activity generated by enzyme occupying over 85% binding sites on Ni2+-NTA-MSP and the minimum activity as absorbance change rates of 0.003 min(-1) for analysis. The prediction of Vs tolerated errors in concentrations of total proteins in lysates and was effective to 6His-tagged alkaline phosphatase and its 6His-tagged mutant in lysates. Notably, of those two 6His-tagged enzymes, Vs was effectively approximated with just one optimized quantity of lysates. Hence, this approach with Ni2+-NTA-MSP worked for comparison of specific activities of 6His-tagged enzyme/mutants in lysates when they had sufficient abundance among proteins and activities of adsorbed enzymes were measurable.
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Affiliation(s)
- Yuanli Li
- Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Medical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Gaobo Long
- Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Medical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Xiaolan Yang
- Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Medical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Xiaolei Hu
- Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Medical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Yiran Feng
- Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Medical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Deng Tan
- Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Medical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Yanling Xie
- Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Medical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Jun Pu
- Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Medical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Fei Liao
- Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Medical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China.
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