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FEBS Lett. 2000 Jun 16;475(2):107-10.

Identification of alternative splicing variants of the beta subunit of human Ca(2+)/calmodulin-dependent protein kinase II with different activities.

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  • 1Shanghai Institute of Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, PR China.


The beta subunit of human Ca(2+)/calmodulin-dependent protein kinase II (beta CaMKII) was identified by searching through an expressed sequence tag database and rapid amplification of cDNA 5'-ends and was assigned to chromosome 7. Reverse transcription-polymerase chain reaction and sequencing analysis identified at least five alternative splicing variants of beta CaMKII (beta, beta6, betae, beta'e, and beta7) in brain and two of them (beta6 and beta7) were first detected in any species. When expressed in HEK 293 cells, the Ca(2+)/calmodulin-dependent kinase activity of beta7, the shortest variant, was much lower than that of either beta (the longest one) or betae (the medium one), suggesting possible regulation of beta CaMKII activity by alternative splicing.

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