Some articles on adenylation:

Amino Acid Synthesis - Amino Acid Biosynthesis Is Regulated By Feedback Inhibition - Additional Regulation Based On Amino Acid Families - α-ketoglutarate Family
... Alterations of the enzyme due to adenylation and deadenylation ... divalent cations and is also related to adenylation ... Glutamine synthase actiivty is also inhibited via adenylation ...