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Dai ZM, Guo W, Yu D, Zhu XJ, Sun S, Huang H, Jiang M, Xie B, Zhang Z, Qiu M. SECISBP2L-Mediated Selenoprotein Synthesis Is Essential for Autonomous Regulation of Oligodendrocyte Differentiation. J Neurosci 2022; 42:5860-5869. [PMID: 35760530 PMCID: PMC9337607 DOI: 10.1523/jneurosci.2141-21.2022] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 06/09/2022] [Accepted: 06/11/2022] [Indexed: 01/29/2023] Open
Abstract
Thyroid hormone (TH) controls the timely differentiation of oligodendrocytes (OLs), and its deficiency can delay myelin development and cause mental retardation. Previous studies showed that the active TH T3 is converted from its prohormone T4 by the selenoprotein DIO2, whose mRNA is primarily expressed in astrocytes in the CNS. In the present study, we discovered that SECISBP2L is highly expressed in differentiating OLs and is required for DIO2 translation. Conditional knock-out (CKO) of Secisbp2l in OL lineage resulted in a decreased level of DIO2 and T3, accompanied by impaired OL differentiation, hypomyelination and motor deficits in both sexes of mice. Moreover, the defective differentiation of OLs in Secisbp2l mutants can be alleviated by T3 or its analog, but not the prohormone T4. The present study has provided strong evidence for the autonomous regulation of OL differentiation by its intrinsic T3 production mediated by the novel SECISBP2L-DIO2-T3 pathway during myelin development.SIGNIFICANCE STATEMENT Secisbp2l is specifically expressed in differentiating oligodendrocytes (OLs) and is essential for selenoprotein translation in OLs. Secisbp2l regulates Dio2 translation for active thyroid hormone (TH) T3 production in the CNS. Autonomous regulation of OLs differentiation via SECISBP2L-DIO2-T3 pathway.
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Affiliation(s)
- Zhong-Min Dai
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Wei Guo
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Dan Yu
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Xiao-Jing Zhu
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
- The Affiliated Hospital, Hangzhou Normal University, Hangzhou, Zhejiang 310015, People's Republic of China
| | - Shuhui Sun
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Hao Huang
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Min Jiang
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Binghua Xie
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Zunyi Zhang
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Mengsheng Qiu
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
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Guo W, Xie B, Jiang M, Zhu XJ, Qiu M, Dai ZM. An improved overlap extension PCR for simultaneous multiple sites large fragments insertion, deletion and substitution. Sci Rep 2019; 9:15637. [PMID: 31666610 PMCID: PMC6821815 DOI: 10.1038/s41598-019-52122-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 10/14/2019] [Indexed: 11/30/2022] Open
Abstract
The existing molecular cloning methods are often limited by the availability of suitable restriction sites. It is still a challenge for simultaneous cloning of multiple fragments into different sites of a single vector. Here we developed a novel method named improved overlap extension PCR (IOEP) for restriction enzyme independent cloning of large fragments. The addition of primers enables IOEP to exponentially amplify the overlap extension product, thus greatly improves the amplification efficiency of large fragments. Moreover, coupled with the benefit of T4 DNA polymerase to improve cloning efficiency, our method can be used to simultaneously insert, delete and replace multiple DNA fragments at different sites.
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Affiliation(s)
- Wei Guo
- College of Life Sciences, Zhejiang University, 388 Yuhangtang Road, Hangzhou, Zhejiang, 310058, P.R. China.,Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xuelin Street, Hangzhou, Zhejiang, 310036, P.R. China
| | - Binhua Xie
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xuelin Street, Hangzhou, Zhejiang, 310036, P.R. China
| | - Min Jiang
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xuelin Street, Hangzhou, Zhejiang, 310036, P.R. China
| | - Xiao-Jing Zhu
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xuelin Street, Hangzhou, Zhejiang, 310036, P.R. China
| | - Mengsheng Qiu
- College of Life Sciences, Zhejiang University, 388 Yuhangtang Road, Hangzhou, Zhejiang, 310058, P.R. China. .,Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xuelin Street, Hangzhou, Zhejiang, 310036, P.R. China.
| | - Zhong-Min Dai
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, 16 Xuelin Street, Hangzhou, Zhejiang, 310036, P.R. China.
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Sun S, Zhu XJ, Huang H, Guo W, Tang T, Xie B, Xu X, Zhang Z, Shen Y, Dai ZM, Qiu M. WNT signaling represses astrogliogenesis via Ngn2-dependent direct suppression of astrocyte gene expression. Glia 2019; 67:1333-1343. [PMID: 30889310 DOI: 10.1002/glia.23608] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 01/21/2019] [Accepted: 02/19/2019] [Indexed: 12/19/2022]
Abstract
Neural progenitor cells (NPCs) are sequentially specified into neurons and glia during the development of central nervous system. WNT/β-catenin signaling is known to regulate the balance between the proliferation and differentiation of NPCs during neurogenesis. However, the function of WNT/β-catenin signaling during gliogenesis remains poorly defined. Here, we report that activation of WNT/β-catenin signaling disrupts astrogliogenesis in the developing spinal cord. Conversely, inhibition of WNT/β-catenin signaling leads to precocious astrogliogenesis. Further analysis reveals that activation of WNT/β-catenin pathway results in a dramatic increase of neurogenin 2 (Ngn2) expression in transgenic mice, and knockdown of Ngn2 expression in neural precursor cells can reverse the inhibitory effect of WNT/β-catenin on astrocytic differentiation. Moreover, Ngn2 can directly bind to the promoters of several astrocyte specific genes and suppress their expression independent of STATs activity. Together, our studies provide the first in vivo evidence that WNT/β-catenin signaling inhibits early astrogliogenesis via an Ngn2-dependent transcriptional repression mechanism.
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Affiliation(s)
- Shuhui Sun
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China.,College of Life Sciences, Zhejiang University, Hangzhou, PR China
| | - Xiao-Jing Zhu
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Hao Huang
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Wei Guo
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China.,College of Life Sciences, Zhejiang University, Hangzhou, PR China
| | - Tao Tang
- Department of Anatomical Sciences and Neurobiology, University of Louisville, Louisville, Kentucky
| | - Binghua Xie
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Xiaofeng Xu
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Zunyi Zhang
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Ying Shen
- Department of Neurobiology, Key Laboratory of Medical Neurobiology of Ministry of Health, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, Hangzhou, PR China
| | - Zhong-Min Dai
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Mengsheng Qiu
- Institute of Life Sciences, Key Laboratory of Organ Development and Regeneration of Zhejiang Province, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China.,College of Life Sciences, Zhejiang University, Hangzhou, PR China
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TT(N)mGCCTC inhibits archaeal family B DNA polymerases. Sci Rep 2018; 8:1990. [PMID: 29386523 PMCID: PMC5792436 DOI: 10.1038/s41598-018-20127-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 12/13/2017] [Indexed: 11/23/2022] Open
Abstract
The proofreading activity of the archaeal family B DNA polymerases enables PCR with high fidelity. However, thermostable proofreading DNA polymerases occasionally failed to amplify target fragment that could be amplified by Taq DNA polymerase. We have previously showed that G-rich sequences, which form G-quadruplex, can bind to and inhibit proofreading DNA polymerases. Here we showed that single-stranded oligonucleotides containing sequences of TT(N)mGCCTC can bind and inhibit archaeal family B DNA polymerases but not Taq DNA polymerase. It is very likely that TT(N)mGCCTC inhibits thermostable DNA polymerases during PCR in a single-stranded form. To the best of our knowledge, this is the first example of DNA sequence that could inhibit DNA polymerase in its single-stranded form.
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Rahman K, Mandalasi M, Zhao P, Sheikh MO, Taujale R, Kim HW, van der Wel H, Matta K, Kannan N, Glushka JN, Wells L, West CM. Characterization of a cytoplasmic glucosyltransferase that extends the core trisaccharide of the Toxoplasma Skp1 E3 ubiquitin ligase subunit. J Biol Chem 2017; 292:18644-18659. [PMID: 28928220 DOI: 10.1074/jbc.m117.809301] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 09/12/2017] [Indexed: 01/06/2023] Open
Abstract
Skp1 is a subunit of the SCF (Skp1/Cullin 1/F-box protein) class of E3 ubiquitin ligases that are important for eukaryotic protein degradation. Unlike its animal counterparts, Skp1 from Toxoplasma gondii is hydroxylated by an O2-dependent prolyl-4-hydroxylase (PhyA), and the resulting hydroxyproline can subsequently be modified by a five-sugar chain. A similar modification is found in the social amoeba Dictyostelium, where it regulates SCF assembly and O2-dependent development. Homologous glycosyltransferases assemble a similar core trisaccharide in both organisms, and a bifunctional α-galactosyltransferase from CAZy family GT77 mediates the addition of the final two sugars in Dictyostelium, generating Galα1, 3Galα1,3Fucα1,2Galβ1,3GlcNAcα1-. Here, we found that Toxoplasma utilizes a cytoplasmic glycosyltransferase from an ancient clade of CAZy family GT32 to catalyze transfer of the fourth sugar. Catalytically active Glt1 was required for the addition of the terminal disaccharide in cells, and cytosolic extracts catalyzed transfer of [3H]glucose from UDP-[3H]glucose to the trisaccharide form of Skp1 in a glt1-dependent fashion. Recombinant Glt1 catalyzed the same reaction, confirming that it directly mediates Skp1 glucosylation, and NMR demonstrated formation of a Glcα1,3Fuc linkage. Recombinant Glt1 strongly preferred the full core trisaccharide attached to Skp1 and labeled only Skp1 in glt1Δ extracts, suggesting specificity for Skp1. glt1-knock-out parasites exhibited a growth defect not rescued by catalytically inactive Glt1, indicating that the glycan acts in concert with the first enzyme in the pathway, PhyA, in cells. A genomic bioinformatics survey suggested that Glt1 belongs to the ancestral Skp1 glycosylation pathway in protists and evolved separately from related Golgi-resident GT32 glycosyltransferases.
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Affiliation(s)
- Kazi Rahman
- From the Department of Biochemistry and Molecular Biology.,the Departments of Microbiology and Immunology and
| | - Msano Mandalasi
- From the Department of Biochemistry and Molecular Biology.,Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, and
| | - Peng Zhao
- the Complex Carbohydrate Research Center, and
| | | | - Rahil Taujale
- the Complex Carbohydrate Research Center, and.,the Institute of Bioinformatics, University of Georgia, Athens, Georgia 30602
| | - Hyun W Kim
- From the Department of Biochemistry and Molecular Biology
| | | | - Khushi Matta
- the Department of Chemical and Biological Engineering, State University of New York, Buffalo, New York 14260
| | - Natarajan Kannan
- From the Department of Biochemistry and Molecular Biology.,the Institute of Bioinformatics, University of Georgia, Athens, Georgia 30602
| | | | - Lance Wells
- From the Department of Biochemistry and Molecular Biology.,the Complex Carbohydrate Research Center, and
| | - Christopher M West
- From the Department of Biochemistry and Molecular Biology, .,Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, and
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Xu JZ, Zhang WG. Strategies used for genetically modifying bacterial genome: site-directed mutagenesis, gene inactivation, and gene over-expression. J Zhejiang Univ Sci B 2016; 17:83-99. [PMID: 26834010 DOI: 10.1631/jzus.b1500187] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
With the availability of the whole genome sequence of Escherichia coli or Corynebacterium glutamicum, strategies for directed DNA manipulation have developed rapidly. DNA manipulation plays an important role in understanding the function of genes and in constructing novel engineering bacteria according to requirement. DNA manipulation involves modifying the autologous genes and expressing the heterogenous genes. Two alternative approaches, using electroporation linear DNA or recombinant suicide plasmid, allow a wide variety of DNA manipulation. However, the over-expression of the desired gene is generally executed via plasmid-mediation. The current review summarizes the common strategies used for genetically modifying E. coli and C. glutamicum genomes, and discusses the technical problem of multi-layered DNA manipulation. Strategies for gene over-expression via integrating into genome are proposed. This review is intended to be an accessible introduction to DNA manipulation within the bacterial genome for novices and a source of the latest experimental information for experienced investigators.
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Affiliation(s)
- Jian-zhong Xu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Wei-guo Zhang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
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Guo W, Sun S, Xie B, Zhu XJ, Dai ZM. T4 DNA polymerase improves the efficiency of multiple site-directed mutagenesis. BIOTECHNOL BIOTEC EQ 2016. [DOI: 10.1080/13102818.2016.1170630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- Wei Guo
- Institute of Life Sciences, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Shuhui Sun
- Institute of Life Sciences, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Binghua Xie
- Institute of Life Sciences, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Xiao-Jing Zhu
- Institute of Life Sciences, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
| | - Zhong-Min Dai
- Institute of Life Sciences, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, PR China
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