Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword mapping
UniProtKB record for P13336 (28_BPT4)
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gp28 functions as a baseplate hub assembly chaperone in T4 tail assembly and combines with gp27 to form an early hub precursor during morphogenesis.
"The gp27 and gp28 proteins seem to combine to form a small hub precursor during morphogenesis."
Deep research summary for Bacteriophage T4 gene 28 (gp28)
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Gene 28 amber mutants fail to form the central hub density of the baseplate, and modern models propose that gp28 acts as a hub assembly chaperone not retained in the mature baseplate-tube complex.
"Cells infected with gene 28 amber mutants accumulated normal 15S arm complexes but produced only small amounts of organized 70S baseplate-like structures that were unstable and, critically, lacked the density at the very center of the baseplate when examined by electron microscopy."