Abstract:
:Until today, 14 isoforms of mammalian calpains have been identified, including calpain-5. The C. elegans calpain-5 homologue tra-3 is reported to be essential for necrotic neuronal cell death. In this study, we cloned and characterized rat calpain-5, which is highly homologous to human and mouse sequences. The nucleotide sequence is 87% and 93% identical with human and mouse calpain-5, respectively. The protein sequence is well conserved, showing 96% identity in mouse and 92% in human. RT-PCR analysis revealed strong expression of calpain-5 in rat lungs, kidneys, and brain while week expression in heart, whereas in rat brain regions it is ubiquitously expressed. The mRNA expression in different human tissues showed equal expression. However, in human brain regions calpain-5 was strongly expressed in hypothalamus, thalamus, cerebellum, and frontal lobe. Western blot analysis on human neuroblastoma SH-SY5Y cells demonstrated calcium-dependent processing of calpain-5, despite the absence of calmodulin-like domain.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Waghray A,Wang DS,McKinsey D,Hayes RL,Wang KKdoi
10.1016/j.bbrc.2004.09.012subject
Has Abstractpub_date
2004-11-05 00:00:00pages
46-51issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(04)02046-7journal_volume
324pub_type
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