A Hanks-type bacterial kinase, PknS, directly phosphorylates the alternative sigma factor EcfK to promote resistance to protist predation.

Lima LDP, Sriranganadane D, da Silva DL, Drebes Dörr NC, Mello EBS, Dos Reis CV, Lourenço RF, Santos JFTDS, Salmazo A, Miranda BW, Massirer KB, Couñago RM, Alvarez-Martinez CE