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| Content Provider | PubMed Central |
|---|---|
| Author | West, B. L. Babbitt, P. C. Mendez, B. Baxter, J. D. |
| Abstract | Creatine kinase (ATP creatine N-phosphotransferase, EC 2.7.3.2) is important in the maintenance of ATP levels in high energy-requiring tissues such as muscle and brain. A complete understanding of its function requires knowledge of its amino acid sequence. To obtain cDNA clones encoding creatine kinase sequences, a cDNA bank was constructed using mRNA from the electric organ of Torpedo californica and was screened by comparing differential colony hybridization of electric organ and liver-derived 32P-labeled cDNAs. Cloned DNAs have been isolated that can arrest the abundant synthesis of Mr 40,000-43,000 material seen after in vitro translation of electric organ mRNA. One of the clones, CK52g8, was sequenced by the dideoxy M13 method and was found to encode a Mr 42,941 protein, which is 68% homologous to a known partial sequence of rabbit muscle creatine kinase and which has a composition similar to creatine kinases from chicken and rabbit tissues. By contrast, no significant homology was found with the known sequences of kinases that use other substrates. RNA blot hybridization analysis indicated that CK52g8 is complementary to a 1600-base-pair mRNA. Primer extension analysis indicated that CK52g8 is only 5 nucleotides short of a full-length cDNA, implying that it encodes a complete protein sequence. The availability of this complete sequence should be useful in further studies of creatine kinase structure and function using techniques such as site-specific mutagenesis. |
| Starting Page | 7007 |
| File Format | |
| ISSN | 10916490 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 22 |
| Volume Number | 81 |
| Language | English |
| Publisher Date | 1984-11-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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