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Emilie Daniel - One of the best experts on this subject based on the ideXlab platform.
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plasmodium condensin core subunits SMC2 smc4 mediate atypical mitosis and are essential for parasite proliferation and transmission
Cell Reports, 2020Co-Authors: Rajan Pandey, Steven Abel, Matthew Boucher, Mohammad Zeeshan, Aline Freville, Xueqing Maggie Lu, Declan Brady, Emilie Daniel, Richard J Wall, Rebecca R StanwayAbstract:Summary Condensin is a multi-subunit protein complex regulating chromosome condensation and segregation during cell division. In Plasmodium spp., the causative agent of malaria, cell division is atypical and the role of condensin is unclear. Here we examine the role of SMC2 and SMC4, the core subunits of condensin, during endomitosis in schizogony and endoreduplication in male gametogenesis. During early schizogony, SMC2/SMC4 localize to a distinct focus, identified as the centromeres by NDC80 fluorescence and chromatin immunoprecipitation sequencing (ChIP-seq) analyses, but do not form condensin I or II complexes. In mature schizonts and during male gametogenesis, there is a diffuse SMC2/SMC4 distribution on chromosomes and in the nucleus, and both condensin I and condensin II complexes form at these stages. Knockdown of SMC2 and smc4 gene expression reveals essential roles in parasite proliferation and transmission. The condensin core subunits (SMC2/SMC4) form different complexes and may have distinct functions at various stages of the parasite life cycle.
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Plasmodium Condensin Core Subunits SMC2/SMC4 Mediate Atypical Mitosis and Are Essential for Parasite Proliferation and Transmission
Cell Reports, 2020Co-Authors: Rajan Pandey, Steven Abel, Matthew Boucher, Mohammad Zeeshan, Aline Freville, Declan Brady, Richard J Wall, Edward Rea, Emilie DanielAbstract:Condensin is a multi-subunit protein complex regulating chromosome condensation and segregation during cell division. In Plasmodium spp., the causative agent of malaria, cell division is atypical and the role of condensin is unclear. Here we examine the role of SMC2 and SMC4, the core subunits of condensin, during endomitosis in schizogony and endoreduplication in male gametogenesis. During early schizogony, SMC2/SMC4 localize to a distinct focus, identified as the centromeres by NDC80 fluorescence and chromatin immunoprecipitation sequencing (ChIP-seq) analyses, but do not form condensin I or II complexes. In mature schizonts and during male gametogenesis, there is a diffuse SMC2/SMC4 distribution on chromosomes and in the nucleus, and both condensin I and condensin II complexes form at these stages. Knockdown of SMC2 and smc4 gene expression reveals essential roles in parasite proliferation and transmission. The condensin core subunits (SMC2/SMC4) form different complexes and may have distinct functions at various stages of the parasite life cycle.
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plasmodium condensin core subunits SMC2 smc4 mediate atypical mitosis and are essential for parasite proliferation and transmission
bioRxiv, 2019Co-Authors: Rajan Pandey, Steven Abel, Matthew Boucher, Mohammad Zeeshan, Aline Freville, Xueqing Maggie Lu, Declan Brady, Emilie Daniel, Richard J Wall, Rebecca R StanwayAbstract:Condensin is a multi-subunit protein complex that regulates chromosome organization, segregation and condensation during cell division in eukaryotes. In Plasmodium spp., the causative agent of malaria, cell division is atypical and the role of condensin is unclear. Here we examine the role of SMC2 and SMC4, the core subunits of condensin during endomitosis in schizogony and endoreduplication in male gametogenesis. SMC2 and SMC4 localize at discrete foci during schizogony, and with a diffuse nuclear distribution during male gametogenesis. ChIP-seq analyses suggest a centromeric location of SMC2/SMC4 only during schizogony. Co-immunoprecipitation data reveal the presence of both condensin complex I and II during male gametogenesis, but only the SMC2/SMC4 heterodimer during schizogony. Finally, knockdown of SMC2 and smc4 gene expression revealed their essential roles in parasite proliferation and transmission. This study shows that condensin core subunits (SMC2/SMC4) have differential complex and distinct functions at different stages of the parasite life cycle.
Rajan Pandey - One of the best experts on this subject based on the ideXlab platform.
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plasmodium condensin core subunits SMC2 smc4 mediate atypical mitosis and are essential for parasite proliferation and transmission
Cell Reports, 2020Co-Authors: Rajan Pandey, Steven Abel, Matthew Boucher, Mohammad Zeeshan, Aline Freville, Xueqing Maggie Lu, Declan Brady, Emilie Daniel, Richard J Wall, Rebecca R StanwayAbstract:Summary Condensin is a multi-subunit protein complex regulating chromosome condensation and segregation during cell division. In Plasmodium spp., the causative agent of malaria, cell division is atypical and the role of condensin is unclear. Here we examine the role of SMC2 and SMC4, the core subunits of condensin, during endomitosis in schizogony and endoreduplication in male gametogenesis. During early schizogony, SMC2/SMC4 localize to a distinct focus, identified as the centromeres by NDC80 fluorescence and chromatin immunoprecipitation sequencing (ChIP-seq) analyses, but do not form condensin I or II complexes. In mature schizonts and during male gametogenesis, there is a diffuse SMC2/SMC4 distribution on chromosomes and in the nucleus, and both condensin I and condensin II complexes form at these stages. Knockdown of SMC2 and smc4 gene expression reveals essential roles in parasite proliferation and transmission. The condensin core subunits (SMC2/SMC4) form different complexes and may have distinct functions at various stages of the parasite life cycle.
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Plasmodium Condensin Core Subunits SMC2/SMC4 Mediate Atypical Mitosis and Are Essential for Parasite Proliferation and Transmission
Cell Reports, 2020Co-Authors: Rajan Pandey, Steven Abel, Matthew Boucher, Mohammad Zeeshan, Aline Freville, Declan Brady, Richard J Wall, Edward Rea, Emilie DanielAbstract:Condensin is a multi-subunit protein complex regulating chromosome condensation and segregation during cell division. In Plasmodium spp., the causative agent of malaria, cell division is atypical and the role of condensin is unclear. Here we examine the role of SMC2 and SMC4, the core subunits of condensin, during endomitosis in schizogony and endoreduplication in male gametogenesis. During early schizogony, SMC2/SMC4 localize to a distinct focus, identified as the centromeres by NDC80 fluorescence and chromatin immunoprecipitation sequencing (ChIP-seq) analyses, but do not form condensin I or II complexes. In mature schizonts and during male gametogenesis, there is a diffuse SMC2/SMC4 distribution on chromosomes and in the nucleus, and both condensin I and condensin II complexes form at these stages. Knockdown of SMC2 and smc4 gene expression reveals essential roles in parasite proliferation and transmission. The condensin core subunits (SMC2/SMC4) form different complexes and may have distinct functions at various stages of the parasite life cycle.
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plasmodium condensin core subunits SMC2 smc4 mediate atypical mitosis and are essential for parasite proliferation and transmission
bioRxiv, 2019Co-Authors: Rajan Pandey, Steven Abel, Matthew Boucher, Mohammad Zeeshan, Aline Freville, Xueqing Maggie Lu, Declan Brady, Emilie Daniel, Richard J Wall, Rebecca R StanwayAbstract:Condensin is a multi-subunit protein complex that regulates chromosome organization, segregation and condensation during cell division in eukaryotes. In Plasmodium spp., the causative agent of malaria, cell division is atypical and the role of condensin is unclear. Here we examine the role of SMC2 and SMC4, the core subunits of condensin during endomitosis in schizogony and endoreduplication in male gametogenesis. SMC2 and SMC4 localize at discrete foci during schizogony, and with a diffuse nuclear distribution during male gametogenesis. ChIP-seq analyses suggest a centromeric location of SMC2/SMC4 only during schizogony. Co-immunoprecipitation data reveal the presence of both condensin complex I and II during male gametogenesis, but only the SMC2/SMC4 heterodimer during schizogony. Finally, knockdown of SMC2 and smc4 gene expression revealed their essential roles in parasite proliferation and transmission. This study shows that condensin core subunits (SMC2/SMC4) have differential complex and distinct functions at different stages of the parasite life cycle.
Zhirui Wang - One of the best experts on this subject based on the ideXlab platform.
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n terminal syndecan 2 domain selectively enhances 6 o heparan sulfate chains sulfation and promotes vegfa 165 dependent neovascularization
Nature Communications, 2019Co-Authors: Federico Corti, Yingdi Wang, John Rhodes, Deepak Atri, Zhen W Zhuang, Dongying Chen, Tianyun Wang, Stephanie A Archerhartmann, Jiasheng Zhang, Zhirui WangAbstract:The proteoglycan Syndecan-2 (Sdc2) has been implicated in regulation of cytoskeleton organization, integrin signaling and developmental angiogenesis in zebrafish. Here we report that mice with global and inducible endothelial-specific deletion of Sdc2 display marked angiogenic and arteriogenic defects and impaired VEGFA165 signaling. No such abnormalities are observed in mice with deletion of the closely related Syndecan-4 (Sdc4) gene. These differences are due to a significantly higher 6-O sulfation level in Sdc2 versus Sdc4 heparan sulfate (HS) chains, leading to an increase in VEGFA165 binding sites and formation of a ternary Sdc2-VEGFA165-VEGFR2 complex which enhances VEGFR2 activation. The increased Sdc2 HS chains 6-O sulfation is driven by a specific N-terminal domain sequence; the insertion of this sequence in Sdc4 N-terminal domain increases 6-O sulfation of its HS chains and promotes Sdc2-VEGFA165-VEGFR2 complex formation. This demonstrates the existence of core protein-determined HS sulfation patterns that regulate specific biological activities. Proteoglycans are glycosylated proteins that play a number of structural and signalling functions. Here, Corti, Wang et al. show that the N-terminal sequence of proteoglycan Syndecan-2 selectively increases 6-O sulfation of its heparan sulfate chains, and that this promotes formation of a ternary Sdc2/VEGFA/VEGFR2 complex leading to increased angiogenesis.
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n terminal syndecan 2 domain selectively enhances 6 o heparan sulfate chains sulfation and promotes vegfa 165 dependent neovascularization
Nature Communications, 2019Co-Authors: Federico Corti, Yingdi Wang, John Rhodes, Deepak Atri, Zhen W Zhuang, Dongying Chen, Tianyun Wang, Stephanie A Archerhartmann, Jiasheng Zhang, Zhirui WangAbstract:The proteoglycan Syndecan-2 (Sdc2) has been implicated in regulation of cytoskeleton organization, integrin signaling and developmental angiogenesis in zebrafish. Here we report that mice with global and inducible endothelial-specific deletion of Sdc2 display marked angiogenic and arteriogenic defects and impaired VEGFA165 signaling. No such abnormalities are observed in mice with deletion of the closely related Syndecan-4 (Sdc4) gene. These differences are due to a significantly higher 6-O sulfation level in Sdc2 versus Sdc4 heparan sulfate (HS) chains, leading to an increase in VEGFA165 binding sites and formation of a ternary Sdc2-VEGFA165-VEGFR2 complex which enhances VEGFR2 activation. The increased Sdc2 HS chains 6-O sulfation is driven by a specific N-terminal domain sequence; the insertion of this sequence in Sdc4 N-terminal domain increases 6-O sulfation of its HS chains and promotes Sdc2-VEGFA165-VEGFR2 complex formation. This demonstrates the existence of core protein-determined HS sulfation patterns that regulate specific biological activities. Proteoglycans are glycosylated proteins that play a number of structural and signalling functions. Here, Corti, Wang et al. show that the N-terminal sequence of proteoglycan Syndecan-2 selectively increases 6-O sulfation of its heparan sulfate chains, and that this promotes formation of a ternary Sdc2/VEGFA/VEGFR2 complex leading to increased angiogenesis.
Rebecca R Stanway - One of the best experts on this subject based on the ideXlab platform.
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plasmodium condensin core subunits SMC2 smc4 mediate atypical mitosis and are essential for parasite proliferation and transmission
Cell Reports, 2020Co-Authors: Rajan Pandey, Steven Abel, Matthew Boucher, Mohammad Zeeshan, Aline Freville, Xueqing Maggie Lu, Declan Brady, Emilie Daniel, Richard J Wall, Rebecca R StanwayAbstract:Summary Condensin is a multi-subunit protein complex regulating chromosome condensation and segregation during cell division. In Plasmodium spp., the causative agent of malaria, cell division is atypical and the role of condensin is unclear. Here we examine the role of SMC2 and SMC4, the core subunits of condensin, during endomitosis in schizogony and endoreduplication in male gametogenesis. During early schizogony, SMC2/SMC4 localize to a distinct focus, identified as the centromeres by NDC80 fluorescence and chromatin immunoprecipitation sequencing (ChIP-seq) analyses, but do not form condensin I or II complexes. In mature schizonts and during male gametogenesis, there is a diffuse SMC2/SMC4 distribution on chromosomes and in the nucleus, and both condensin I and condensin II complexes form at these stages. Knockdown of SMC2 and smc4 gene expression reveals essential roles in parasite proliferation and transmission. The condensin core subunits (SMC2/SMC4) form different complexes and may have distinct functions at various stages of the parasite life cycle.
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plasmodium condensin core subunits SMC2 smc4 mediate atypical mitosis and are essential for parasite proliferation and transmission
bioRxiv, 2019Co-Authors: Rajan Pandey, Steven Abel, Matthew Boucher, Mohammad Zeeshan, Aline Freville, Xueqing Maggie Lu, Declan Brady, Emilie Daniel, Richard J Wall, Rebecca R StanwayAbstract:Condensin is a multi-subunit protein complex that regulates chromosome organization, segregation and condensation during cell division in eukaryotes. In Plasmodium spp., the causative agent of malaria, cell division is atypical and the role of condensin is unclear. Here we examine the role of SMC2 and SMC4, the core subunits of condensin during endomitosis in schizogony and endoreduplication in male gametogenesis. SMC2 and SMC4 localize at discrete foci during schizogony, and with a diffuse nuclear distribution during male gametogenesis. ChIP-seq analyses suggest a centromeric location of SMC2/SMC4 only during schizogony. Co-immunoprecipitation data reveal the presence of both condensin complex I and II during male gametogenesis, but only the SMC2/SMC4 heterodimer during schizogony. Finally, knockdown of SMC2 and smc4 gene expression revealed their essential roles in parasite proliferation and transmission. This study shows that condensin core subunits (SMC2/SMC4) have differential complex and distinct functions at different stages of the parasite life cycle.
Thomas Lubberstedt - One of the best experts on this subject based on the ideXlab platform.
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origin of scm1 and scm2 two loci conferring resistance to sugarcane mosaic virus scmv in maize
Theoretical and Applied Genetics, 2000Co-Authors: Mingliang Xu, Thomas LubberstedtAbstract:Sugarcane mosaic virus (SCMV) causes serious losses of grain and forage yield of maize (Zea mays L.) in Europe. Two dominant genes, Scm1 and Scm2, have been identified to confer resistance to SCMV. Scm1 is located on the short arm of chromosome 6 and Scm2 near the centromere region of chromosome 3. In the present study,resistant, partially resistant, and susceptible maize inbred lines, together with their ancestral lines, were evaluated with molecular markers to trace back the origin of Scm1 and Scm2. The banding patterns indicated that the Scm1 region, originally identified in resistant European line FAP1360A, was derived from its ancestral line FAP954A. The other two resistant European lines, D21 and D32, most likely carry the same Scm1 region, which originated from their common ancestral line A632. This Scm1 region was also present in three partially resistant lines, D09, FAP1396A and FAP693A, but not in the resistant U.S. inbred Pa405. Apart from FAP954A and A632, none of the remaining ancestral lines and none of the susceptible lines harbored the Scm1 region. The Scm2 region present in FAP1360A was obviously transmitted from its ancestral line Co125. However, the presence of the respective Scm2 region was not confirmed in the other three resistant lines (D21, D32 and Pa405), the remaining ancestral lines, and all partially resistant lines by using closely linked markers.
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high resolution mapping of loci conferring resistance to sugarcane mosaic virus in maize using rflp ssr and aflp markers
Molecular Genetics and Genomics, 1999Co-Authors: Mingliang Xu, Thomas LubberstedtAbstract:Sugarcane mosaic virus (SCMV) is one of the most important virus diseases of maize in Europe. Genetic analysis on backcross five (BC5) progeny derived from the cross FAP1360A (resistant) × F7 (susceptible) confirmed that at least two dominant genes, Scm1 and Scm2, are required for resistance to SCMV in the progeny of this cross. With the aid of RFLP and SSR marker analyses, Scm1 was mapped in the region of 8.7 cM – between the nucleolus organizer region (nor) and RFLP marker bnl6.29 on the short arm of chromosome 6, while Scm2 was mapped to an interval of 26.8 cM flanked by the RFLP markers umc92 and umc102 near the centromere region of chromosome 3. Both chromosome regions were further enriched for AFLP markers by successful application of a bulked segregant analysis to this oligogenic trait. A total of 23 linked AFLP markers were identified, clustered in chromosome regions adjacent to either Scm1 or Scm2. Seven AFLP markers linked to Scm1 resided within the nor-bnl6.29 interval, and one of them, E3M8-1, showed no recombination with Scm1. Three AFLP markers linked to Scm2 are located between umc92 and umc102.
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high resolution mapping of loci conferring resistance to sugarcane mosaic virus in maize using rflp ssr and aflp markers
Molecular Genetics and Genomics, 1999Co-Authors: Mingliang Xu, Albrecht E Melchinger, Thomas LubberstedtAbstract:Sugarcane mosaic virus (SCMV) is one of the most important virus diseases of maize in Europe. Genetic analysis on backcross five (BC5) progeny derived from the cross FAP1360A (resistant) × F7 (susceptible) confirmed that at least two dominant genes, Scm1 and Scm2, are required for resistance to SCMV in the progeny of this cross. With the aid of RFLP and SSR marker analyses, Scm1 was mapped in the region of 8.7 cM – between the nucleolus organizer region (nor) and RFLP marker bnl6.29 on the short arm of chromosome 6, while Scm2 was mapped to an interval of 26.8 cM flanked by the RFLP markers umc92 and umc102 near the centromere region of chromosome 3. Both chromosome regions were further enriched for AFLP markers by successful application of a bulked segregant analysis to this oligogenic trait. A total of 23 linked AFLP markers were identified, clustered in chromosome regions adjacent to either Scm1 or Scm2. Seven AFLP markers linked to Scm1 resided within the nor-bnl6.29 interval, and one of them, E3M8-1, showed no recombination with Scm1. Three AFLP markers linked to Scm2 are located between umc92 and umc102.