Family of unknown function (DUF5840)This family contains uncharacterized proteins. It also contains the anacyclamide synthesis protein AcyE. Cyanobactins are small, cyclic peptides found in cyanobacteria. They are ribosomally synthesized and post-translationally modified. Cyanobactin biosynthesis clusters contain 7-12 genes. Anaclyclamides are a type of cyanobactin produced in strains of the cyanobacteria Anabaena. AcyE is a 49-amino-acid protein with N-terminal homology to the peptide precursor proteins in the other cyanobactin pathways. The core peptide of AcyE is cleaved during post-translational processing of the precursor peptide.