This domain is found in the catalytic subunit (alpha) of the enzymatic complex AMP-activated protein kinase (AMPK). This protein is organised into an N-terminal kinase domain (KD, Pfam:PF00069) and a regulatory C-terminus, which contains an autoinhibitory domain (AID, this entry). This domain can form a compact domain that stabilizes the KD and binds to CBS-2 of the gamma-subunit [1-7].

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2: Structure of mammalian AMPK and its regulation by ADP. Xiao B, Sanders MJ, Underwood E, Heath R, Mayer FV, Carmena D, Jing C, Walker PA, Eccleston JF, Haire LF, Saiu P, Howell SA, Aasland R, Martin SR, Carling D, Gamblin SJ; Nature. 2011;472:230-233. PMID:21399626

3: Conserved regulatory elements in AMPK. Chen L, Xin FJ, Wang J, Hu J, Zhang YY, Wan S, Cao LS, Lu C, Li P, Yan SF, Neumann D, Schlattner U, Xia B, Wang ZX, Wu JW; Nature. 2013;498:E8-10. PMID:23765502

4: Structural basis for AMPK activation: natural and synthetic ligands regulate kinase activity from opposite poles by different molecular mechanisms. Calabrese MF, Rajamohan F, Harris MS, Caspers NL, Magyar R, Withka JM, Wang H, Borzilleri KA, Sahasrabudhe PV, Hoth LR, Geoghegan KF, Han S, Brown J, Subashi TA, Reyes AR, Frisbie RK, Ward J, Miller RA, Landro JA, Londregan AT, Carpino PA, Cabral S, Smith AC, Conn EL, Cameron KO, Qiu X, Kurumbail RG; Structure. 2014;22:1161-1172. PMID:25066137

5: Structural basis of AMPK regulation by adenine nucleotides and glycogen. Li X, Wang L, Zhou XE, Ke J, de Waal PW, Gu X, Tan MH, Wang D, Wu D, Xu HE, Melcher K; Cell Res. 2015;25:50-66. PMID:25412657

6: Functional domains of the alpha1 catalytic subunit of the AMP-activated protein kinase. Crute BE, Seefeld K, Gamble J, Kemp BE, Witters LA; J Biol Chem. 1998;273:35347-35354. PMID:9857077

7: Conserved alpha-helix acts as autoinhibitory sequence in AMP-activated protein kinase alpha subunits. Pang T, Xiong B, Li JY, Qiu BY, Jin GZ, Shen JK, Li J; J Biol Chem. 2007;282:495-506. PMID:17088252