Annotation of sequences of transposon insertion sites in the chromosome of Escherichia coli O157:H7 cells that had lost their acid-resistance properties revealed four genes: two encoding isoforms of glutamate decarboxylase (GadA and GadB) and one encoding a glutamate/gamma-aminobutyric acid (GABA) antiporter. What does the fourth gene encode?

Question

Quizplus · Accepted Answer

The fourth gene likely encodes a possible regulator, as the other genes mentioned are directly involved in the acid resistance mechanism through the glutamate decarboxylase system and GABA transport, suggesting the involvement of regulatory elements in this pathway.

Annotation of Sequences of Transposon Insertion Sites in the Chromosome