6bql

Structural highlights

Function

[KKCC2_HUMAN] Calcium/calmodulin-dependent protein kinase belonging to a proposed calcium-triggered signaling cascade involved in a number of cellular processes. Isoform 1, isoform 2 and isoform 3 phosphorylate CAMK1 and CAMK4. Isoform 3 phosphorylates CAMK1D. Isoform 4, isoform 5 and isoform 6 lacking part of the calmodulin-binding domain are inactive. Efficiently phosphorylates 5'-AMP-activated protein kinase (AMPK) trimer, including that consisting of PRKAA1, PRKAB1 and PRKAG1. This phosphorylation is stimulated in response to Ca(2+) signals (By similarity). Seems to be involved in hippocampal activation of CREB1 (By similarity). May play a role in neurite growth. Isoform 3 may promote neurite elongation, while isoform 1 may promoter neurite branching.^{[1] [2] [3] [4]}

References

1. ↑ Hsu LS, Chen GD, Lee LS, Chi CW, Cheng JF, Chen JY. Human Ca2+/calmodulin-dependent protein kinase kinase beta gene encodes multiple isoforms that display distinct kinase activity. J Biol Chem. 2001 Aug 17;276(33):31113-23. Epub 2001 Jun 6. PMID:11395482 doi:http://dx.doi.org/10.1074/jbc.M011720200
2. ↑ Ishikawa Y, Tokumitsu H, Inuzuka H, Murata-Hori M, Hosoya H, Kobayashi R. Identification and characterization of novel components of a Ca2+/calmodulin-dependent protein kinase cascade in HeLa cells. FEBS Lett. 2003 Aug 28;550(1-3):57-63. PMID:12935886
3. ↑ Hsu LS, Tsou AP, Chi CW, Lee CH, Chen JY. Cloning, expression and chromosomal localization of human Ca2+/calmodulin-dependent protein kinase kinase. J Biomed Sci. 1998;5(2):141-9. PMID:9662074
4. ↑ Cao W, Sohail M, Liu G, Koumbadinga GA, Lobo VG, Xie J. Differential effects of PKA-controlled CaMKK2 variants on neuronal differentiation. RNA Biol. 2011 Nov-Dec;8(6):1061-72. doi: 10.4161/rna.8.6.16691. Epub 2011 Nov 1. PMID:21957496 doi:http://dx.doi.org/10.4161/rna.8.6.16691