A screen of random sequences for those that alter the trafficking of the influenza virus hemagglutinin in vivo.

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Abstract

In order to determine if the sequence patterns known to specify internalization represent the majority of possible internalization signals, we identified random sequences capable of causing a reporter protein to be internalized at least several-fold faster than the rate of non-selective internalization of membrane by clathrin-coated pits. A library of influenza hemagglutinin (HA) proteins, bearing short random sequences in place of the wild-type cytoplasmic domain, was prepared in recombinant SV40 virus. The library was expressed and screened for HAs that could internalize anti-HA antibody from the medium. The cytoplasmic sequences of the selected proteins were determined. From a small sample of sequences we detected several that did not resemble those previously identified. The known internalization signals must represent only a subset of the sequences that can serve as internalization signals.

Original languageEnglish (US)
Pages (from-to)282-290
Number of pages9
JournalTraffic (Copenhagen, Denmark)
Volume1
Issue number3
Publication statusPublished - Mar 2000

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ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Structural Biology
  • Molecular Biology
  • Genetics

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