Structural and Biochemical Investigation of Heptad Repeat Derived Peptides of Human SARS Corona Virus (hSARS-CoV) Spike Protein+

Author(s): Sarmistha Basak, Xiaolei Hao, Andrew Chen, Michel Chretien, Ajoy Basak

Journal Name: Protein & Peptide Letters

Volume 15 , Issue 9 , 2008

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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 Cterminal 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-N892-931 domain. These peptides may find useful therapeutic applications in SARS intervention.

Keywords: Severe acute respiratory syndrome, Spike protein, Heptad repeat domains, Host-virus fusion, Helical structure, Proteolysis

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Article Details

VOLUME: 15
ISSUE: 9
Year: 2008
Page: [874 - 886]
Pages: 13
DOI: 10.2174/092986608785849173
Price: $65

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