title: Structural and biochemical investigation of heptad repeat derived peptides of human SARS corona virus (hSARS-CoV) spike protein.
abstract: hSARS-CoV is the causative agent for SARS infection. Its spike glycoprotein (S) is processed by host furin enzyme to produce S1 and S2 fragments, the latter being crucial for fusion with the host membrane. This takes place via formation of a coiled coil 6-helix bundle involving N and C-terminal heptad repeat domains (HR-N and HR-C) of S2. Several fluorescent and non-fluorescent peptides from these domains were synthesized to examine their interactions by circular dichroism, thermal denaturation, native-page, mass spectrometry and fluorescence spectroscopy studies. Data revealed that HR-C domains (1153-1189), (1153-1172) and (1164-1184) all exhibit potent binding interactions with HR-N(892-931) domain. These peptides may find useful therapeutic applications in SARS intervention.
authors.affiliation: Chronic Disease Program, Regional Protein Chemistry Center, Ottawa Health Research Institute, 725 Parkdale Ave, Ottawa, Ontario K1Y 4E9, Canada.
authors.forename: Sarmistha
authors.initials: S
authors.lastname: Basak
authors.forename: Xiaolei
authors.initials: X
authors.lastname: Hao
authors.forename: Andrew
authors.initials: A
authors.lastname: Chen
authors.forename: Michel
authors.initials: M
authors.lastname: Chrétien
authors.forename: Ajoy
authors.initials: A
authors.lastname: Basak
mesh_terms: D000595:Amino Acid Sequence; D002851:Chromatography, High Pressure Liquid; D002942:Circular Dichroism; D004591:Electrophoresis, Polyacrylamide Gel; D013058:Mass Spectrometry; D050576:Membrane Fusion Proteins; D008562:Membrane Glycoproteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D010455:Peptides / Q000138:chemical synthesis / Q000737:chemistry / Q000378:metabolism*; D011485:Protein Binding; D011489:Protein Denaturation; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary; D045473:Severe acute respiratory syndrome-related coronavirus / Q000737:chemistry* / Q000378:metabolism; D020539:Sequence Analysis, Protein; D013050:Spectrometry, Fluorescence; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D064370:Spike Glycoprotein, Coronavirus; D014759:Viral Envelope Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism
chemical_list: D050576:Membrane Fusion Proteins; D008562:Membrane Glycoproteins; D010455:Peptides; D064370:Spike Glycoprotein, Coronavirus; D014759:Viral Envelope Proteins