Protein Kinase Classification: Atypical/Alpha※ Alpha family introduction Alpha kinases belong to atypical kinase group and lack significant sequence similarity to ePK (1). Six members have been identified in mammals, including elongation factor 2 kinase, Dictyostelium myosin heavy chain kinases and other protein kinases. eEF-2 is involve in regulation of the global rate of protein synthesis and MHCK A is essential in regualtion of myosin assembly and disassembly. Although no detectable sequence identity between ePK and Alpha kinases has been found, the structure, sequence motifs and key amino acid residue position are very similar. The differences may impact on substrate recognition (2).
Reference
1. Manning, G., Whyte, D.B., Martinez, R., Hunter, T. and Sudarsanam, S. (2002) The protein kinase complement of the human genome. Science, 298, 1912-1934. PMID: 12471243
2. Drennan, D. and Ryazanov, A.G. (2004) Alpha-kinases: analysis of the family and comparison with conventional protein kinases. Prog Biophys Mol Biol, 85, 1-32. PMID: 15050379
Atypical Alpha in eukaryotes:
1. Manning, G., Whyte, D.B., Martinez, R., Hunter, T. and Sudarsanam, S. (2002) The protein kinase complement of the human genome. Science, 298, 1912-1934. PMID: 12471243
2. Drennan, D. and Ryazanov, A.G. (2004) Alpha-kinases: analysis of the family and comparison with conventional protein kinases. Prog Biophys Mol Biol, 85, 1-32. PMID: 15050379
Atypical Alpha in eukaryotes: