A C-terminal pseudogene fragment of BcsQ, which has a premature stop codon at position 6 of the intact protein. The mutation prevents cellulose synthesis, and has polar effects on transcription of downstream gene bcsA and probably also bcsB, bcsZ and bcsC (PubMed:24097954). When the reading frame is restored cellulose biosynthesis is also restored, see (AC P0DP92) for an intact protein. May play a role in subcellular localization of an active cellulose biosynthesis apparatus at the bacterial cell pole (By similarity). Part of the yhjR-bcsQABZC operon (PubMed:24097954). Cellulose production is abolished in E.coli K12 /MG1655 and W3110 due to a premature stop codon in this gene. The sequence given here starts on a GTG codon 6 nucleotides downstream of the premature stop codon. Belongs to the BcsQ family. Could be the product of a pseudogene. The protein is missing 8 N-terminal amino acids due to a premature stop codon; when the reading frame is restored strain W3110 synthesizes cellulose. See (AC P0DP92) for a functional intact protein.