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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Structure and expression of a cluster of human hematopoietic serine protease genes found on chromosome 14q11.2.

We previously identified a cluster of hematopoietic serine protease genes on chromosome 14 at band q11. 2. This cluster contains the cathepsin G gene and the two related cathepsin G-like genes CGL-1 and CGL-2. The CGL-1 gene is identical with the cytotoxic T cell serine protease CSP-B (also called SECT, and in mice, CCP1, granzyme B, or CTLA-1). In this report, we determined that CGL-2 is identical with a recently described gene called h-CCPX. The coding sequences of CG, CGL-1, and CGL-2 are 65-75% identical at the DNA level. The intervening sequences are much less conserved, except for introns 3 of the CGL-1 and CGL-2 genes, which are 93% identical. Each of the genes has the same overall organization, with 5 exons and 4 introns, very short 5' untranslated regions, and identical splice phases for all of the introns. Cathepsin G is expressed at high levels in promyelocytes/promonocytes, and CGL-1/CSP-B is expressed at high levels in activated cytolytic T cells, lymphokine-activated killer (LAK), and natural killer (NK) cells. CGL-2/h-CCPX is expressed at much lower levels in activated peripheral blood lymphocytes, LAK and NK cells. To begin to define the regulatory elements that target expression of each of these genes to their specific lineages at specific times, the 5' flanking region of each gene was sequenced. The 5' flanking regions are minimally related and have few conserved consensus elements. Further experiments will be required to determine the critical cis-acting regulatory sequences required for tissue- and development-specific expression of each of these genes.[1]


  1. Structure and expression of a cluster of human hematopoietic serine protease genes found on chromosome 14q11.2. Heusel, J.W., Hanson, R.D., Silverman, G.A., Ley, T.J. J. Biol. Chem. (1991) [Pubmed]
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