16S rRNA (cytosine<sup>967</sup>-C<sup>5</sup>)-methyltransferase (, rsmB (gene), fmu (gene), 16S rRNA m5C967 methyltransferase) is an enzyme with systematic name S-adenosyl-L-methionine:16S rRNA (cytosine<sup>967</sup>-C<sup>5</sup>)-methyltransferase. This enzyme catalyses the following chemical reaction
The enzyme specifically methylates cytosine<sup>967</sup> at C<sup>5</sup> in 16S rRNA.