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Sequence of the cDNA encoding murine CRK4 protein kinase
Stepanova LYu1, M A Ershler, A V Belyavsky
1Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow.
Gene
|November 18, 1994
Summary
Researchers isolated and sequenced a murine CRK4 protein kinase cDNA clone. This kinase shows high sequence identity to Xenopus laevis MO15 protein kinase, suggesting conserved function.
Area of Science:
- Molecular Biology
- Biochemistry
- Genetics
Background:
- CRK4 is a murine protein kinase.
- Protein kinases play crucial roles in cellular signaling pathways.
- Understanding kinase structure and function is vital for biological research.
Purpose of the Study:
- To isolate and sequence the cDNA encoding murine CRK4 protein kinase.
- To compare the CRK4 sequence with known protein kinases.
- To investigate potential functional similarities between CRK4 and other kinases.
Main Methods:
- cDNA cloning and sequencing.
- Amino acid sequence analysis.
- Sequence homology comparison.
Main Results:
- A cDNA clone for murine CRK4 protein kinase was successfully isolated and sequenced.
- The deduced amino acid sequence of CRK4 exhibits 85% overall identity to Xenopus laevis MO15 protein kinase (CAK).
- A highly conserved region (97.5% amino acid identity) was identified in the central domains of CRK4 and MO15.
Conclusions:
- Murine CRK4 protein kinase shares significant sequence homology with Xenopus laevis MO15 PK.
- The high conservation suggests a conserved catalytic subunit of a kinase, likely a CDK-Activating Kinase (CAK).
- These findings provide insights into the evolutionary conservation of protein kinases and their functions.