Nucleotide sequence of the flgD gene of Salmonella typhimurium which is essential for flagellar hook formation.

We determined the complete nucleotide sequence of the flgD gene of Salmonella typhimurium which is essential for flagellar hook formation. The sequence predicts a protein of 232 amino acids and a calculated molecular mass of 23,987 Da. However, the N-terminal 86 amino acids of FlgD were found sufficient to complement all the flgD mutations examined. The predicted secondary structure suggested that FlgD has a high content of beta structure.