Setagin and secretagogin-R22: Posttranscriptional modification products of the secretagogin gene

• Published in: Biochemical and biophysical research communications Vol. 329; no. 4; pp. 1193 - 1199
• Main Authors: Zierhut, Barbara, Daneva, Teodora, Gartner, Wolfgang, Brunnmaier, Barbara, Mineva, Ivelina, Berggård, Tord, Wagner, Ludwig
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 22-04-2005
• Subjects: Alternative Splicing - genetics; Amino Acid Sequence; Antibodies - immunology; Biologi; Biological Sciences; Calcium - metabolism; Calcium-Binding Proteins - chemistry; Calcium-Binding Proteins - genetics; Calcium-Binding Proteins - metabolism; Cloning, Molecular; DNA, Complementary - genetics; EF-hand calcium binding protein; Escherichia coli - genetics; Humans; Molecular Sequence Data; Natural Sciences; Naturvetenskap; RNA editing; RNA, Messenger - genetics; RNA, Messenger - metabolism; Secretagogin; Secretagogin-R22; Secretagogins; Sequence Alignment; Setagin; Transcription, Genetic - genetics; Secretagogin; RNA editing; Secretagogin-R22; Setagin; EF-hand calcium binding protein
• ISSN: 0006-291X; 1090-2104; 1090-2104
• DOI: 10.1016/j.bbrc.2005.02.093

We describe two new variants of the recently identified hexa-EF-hand calcium binding protein secretagogin. The first variant (secretagogin-R22) is characterized by one single amino acid exchange (Q/R) at codon 22, most likely due to RNA editing. The second variant of secretagogin (setagin) consists of 49 amino acids. Due to a frame shift, only the first 27 amino acids are identical to secretagogin. We demonstrate that this protein truncation results in complete loss of the calcium binding capacity. Setagin expression was found in considerable amounts in the pancreas whereas secretagogin and secretagogin-R22 were also found in the central nervous system and organs containing neurendocrine cells.