Amino-terminal sequence, synthesis, and membrane insertion of glycoprotein B of herpes simplex virus type 1

  • Claesson-Welsh L
  • Spear P
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Abstract

Glycoprotein B (gB) was purified from cells infected with two strains (KOS and F) of herpes simplex virus type 1. Determination of amino acid sequence at the NH2 termini revealed, by comparison with amino acid sequence deduced from previously published nucleotide sequence, that gB is made with a cleavable signal sequence of 29 or 30 amino acids, depending on the virus strain. Analysis of gB translated in vitro in the presence and absence of membranes showed that gB is inserted into membranes and glycosylated cotranslationally; a large portion of the gB polypeptide made in vitro is protected from proteolysis by membranes; the large protected fragment carries N-linked carbohydrate and is probably the NH2 terminus based on locations of signals for the addition of N-linked carbohydrate; and the size of the protected fragment is 93 kilodaltons (kDa) for gB made in vitro and associated with dog pancreas membranes, whereas both 93- and 98-kDa protected fragments can be detected for gB made in vivo. These last results are consistent with a previous proposal that gB may traverse the membrane three times.

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Claesson-Welsh, L., & Spear, P. G. (1987). Amino-terminal sequence, synthesis, and membrane insertion of glycoprotein B of herpes simplex virus type 1. Journal of Virology, 61(1), 1–7. https://doi.org/10.1128/jvi.61.1.1-7.1987

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