1887

Abstract

SUMMARY

A temperature-sensitive mutant ( 1/9) obtained by undiluted passage of fowl plague virus (FPV) at 33 °C carried a strong defect in RNA segment 6 [neuraminidase (NA) gene] and a weak defect in RNA segment 8 [non-structural (NS) protein gene]. Although the viral proteins have normal migration rates, the NS gene migrated during polyacrylamide gel electrophoresis (PAGE) significantly faster than the NS gene of wild-type FPV, even after denaturation by glyoxal. Despite this observation, the NS gene of 1/9 did not carry a deletion as shown by sequence determination. There were only five base replacements which resulted in three changes in amino acids. Three of the base replacements led to a more compact secondary structure of RNA segment 8, which seems to be responsible for the faster migration rate during PAGE and which seems to resist, at least partially, the treatment with glyoxal.

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/content/journal/jgv/10.1099/0022-1317-66-8-1679
1985-08-01
2022-01-23
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