| First Author | Mühlebach SM | Year | 1996 |
| Journal | J Biol Chem | Volume | 271 |
| Issue | 20 | Pages | 11920-9 |
| PubMed ID | 8662608 | Mgi Jnum | J:33024 |
| Mgi Id | MGI:80512 | Doi | 10.1074/jbc.271.20.11920 |
| Citation | Muhlebach SM, et al. (1996) Evolution of the creative kinases. The chicken acidic type mitochondrial creatine kinase gene as the first nonmammalian gene. J Biol Chem 271(20):11920-9 |
| abstractText | In both mammals and birds, the creatine kinase (CK) family consists of four types of genes: cytosolic brain type (B-CK); cytosolic muscle type (M-CK); mitochondrial ubiquitous, acidic type (Mia-CK); and mitochondrial sarcomeric, basic type (Mib-CK). We report here the cloning of the chicken Mia-CK cDNA and its gene. Amino acid sequences of the mature chicken Mi-CK proteins show about 90% identity to the homologous mammalian isoforms. The leader peptides, however, which are isoenzyme-specifically conserved among the mammalian Mi-CKs, are quite different in the chicken with amino acid identity values compared with the mammalian leader peptides of 38.5-51.3%. The chicken Mia-CK gene spans about 7.6 kilobases and contains 9 exons. The region around exon 1 shows a peculiar base composition, with more than 80% GC, and has the characteristics of a CpG island. The upstream sequences lack TATA or CCAAT boxes and display further properties of housekeeping genes. Several transcription factor binding sites known from mammalian Mi-CK genes are absent from the chicken gene. Although the promoter structure suggests a ubiquitous range of expression, analysis of Mia-CK transcripts in chicken tissues shows a restricted pattern and therefore does not fulfill all criteria of a housekeeping enzyme. |
