Internal scaffolding protein B

UniProtKB accession:  P03633

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UniProtKB description:  Participates in the assembly of the viral procapsid in the cytoplasm. Forms first a 12S pre-assembly complex with protein H, and F and G pentamers, then twelve 12S complexes are joined by the D protein to form the procapsid. Internal scaffold protein B is released from the procapsid upon genome packaging (PubMed:159449). Autoproteolytic activity cleaves protein B and probably facilitates its removal through the pores of the procapsid (PubMed:12473449).