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10.1002/pro.225

http://scihub22266oqcxt.onion/10.1002/pro.225
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19691129!2788276!19691129
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suck abstract from ncbi


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pmid19691129      Protein+Sci 2009 ; 18 (11): 2209-18
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  • Elucidation of the stability and functional regions of the human coronavirus OC43 nucleocapsid protein #MMPMID19691129
  • Huang CY; Hsu YL; Chiang WL; Hou MH
  • Protein Sci 2009[Nov]; 18 (11): 2209-18 PMID19691129show ga
  • Human coronavirus OC43 (HCoV-OC43) is one of the causes of the "common cold" in human during seasons of cold weather. The primary function of the HCoV-OC43 nucleocapsid protein (N protein) is to recognize viral genomic RNA, which leads to ribonucleocapsid formation. Here, we characterized the stability and identified the functional regions of the recombinant HCoV-OC43 N protein. Circular dichroism and fluorescence measurements revealed that the HCoV-OC43 N protein is more highly ordered and stabler than the SARS-CoV N protein previously studied. Surface plasmon resonance (SPR) experiments showed that the affinity of HCoV-OC43 N protein for RNA was approximately fivefold higher than that of N protein for DNA. Moreover, we found that the HCoV-OC43 N protein contains three RNA-binding regions in its N-terminal region (residues 1-173) and central-linker region (residues 174-232 and 233-300). The binding affinities of the truncated N proteins and RNA follow the order: residues 1-173-residues 233-300 > residues 174-232. SPR experiments demonstrated that the C-terminal region (residues 301-448) of HCoV-OC43 N protein lacks RNA-binding activity, while crosslinking and gel filtration analyses revealed that the C-terminal region is mainly involved in the oligomerization of the HCoV-OC43 N protein. This study may benefit the understanding of the mechanism of HCoV-OC43 nucleocapsid formation.
  • |Binding Sites[MESH]
  • |Circular Dichroism[MESH]
  • |Coronavirus Nucleocapsid Proteins[MESH]
  • |Coronavirus OC43, Human/*chemistry[MESH]
  • |Glutaral/chemistry[MESH]
  • |Humans[MESH]
  • |Nucleic Acids/metabolism[MESH]
  • |Nucleocapsid Proteins/chemistry/*metabolism[MESH]
  • |Protein Multimerization[MESH]
  • |Protein Stability[MESH]
  • |RNA-Binding Proteins/chemistry/*metabolism[MESH]
  • |Recombinant Proteins/chemistry/*metabolism[MESH]
  • |Spectrometry, Fluorescence[MESH]


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