Scientific background: |
PCSK2(Proprotein Convertase, Subtilisin/Kexin-Type, 2), also known as PC2 or NEC2, is an enzyme responsible for the first step in the maturation of many neuroendocrine peptides from their precursors, such as the conversion of proinsulin to insulin intermediates. Seidah et al. (1991) mapped the NEC2 gene to human chromosome 20p11.2-p11.1. Ohagi et al. (1992) observed expression of the chloramphenicol acetyltransferase reporter fusions containing the putative promoter region in insulinoma cells but not in hepatoma cells, consistent with the known tissue-specific pattern of expression of the PC2 gene. Analysis of the level of CAT activity with several deletion mutants identified the region from -1100 to -539 from the translation start site as essential for PC2 promoter activity. |
References: |
1. Maglott, D. R., Feldblyum, T. V., Durkin, A. S., Nierman, W. C. Radiation hybrid mapping of SNAP, PCSK2, and THBD (human chromosome 20p). Mammalian Genome 7: 400-401, 1996.
2. Ohagi, S., LaMendola, J., LeBeau, M. M., Espinosa, R., III, Takeda, J., Smeekens, S. P., Chan, S. J., Steiner, D. F. Identification and analysis of the gene encoding human PC2, a prohormone convertase expressed in neuroendocrine tissues. Proc. Nat. Acad. Sci. 89: 4977-4981, 1992.
3. Seidah, N. G., Mattei, M. G., Gaspar, L., Benjannet, S., Mbikay, M., Chretien, M. Chromosomal assignments of the genes for neuroendocrine convertase PC1 (NEC1) to human 5q15-21, neuroendocrine convertase PC2 (NEC2) to human 20p11.1-11.2, and furin (mouse 7[D1-E2] region). Genomics 11: 103-107, 1991. |