| First Author | Holzman LB | Year | 1994 |
| Journal | J Biol Chem | Volume | 269 |
| Issue | 49 | Pages | 30808-17 |
| PubMed ID | 7983011 | Mgi Jnum | J:20630 |
| Mgi Id | MGI:69622 | Doi | 10.1016/S0021-9258(18)47353-X |
| Citation | Holzman LB, et al. (1994) Identification, molecular cloning, and characterization of dual leucine zipper bearing kinase. A novel serine/threonine protein kinase that defines a second subfamily of mixed lineage kinases. J Biol Chem 269(49):30808-17 |
| abstractText | Molecular cloning using a degenerate oligonucleotide-based polymerase chain reaction was undertaken to test the possibility that novel, developmentally regulated protein kinases are expressed in the embryonic mouse kidney. Several receptor tyrosine kinase and serine/threonine kinase cDNA clones were identified. One of these, designated DLK, represented a novel gene product whose 3.6-kilobase transcript was expressed in a tissue-specific and developmentally regulated fashion. Several clones encoding the entire open reading frame were isolated and sequenced. The identified open reading frame encodes an 888-amino acid polypeptide that defines a new subfamily within the mixed lineage protein kinase family. Sequence analysis revealed: 1) a kinase catalytic domain most characteristic of serine/threonine kinases but hybrid between members of the family of microtubule-associated protein kinase kinase kinases and the fibroblast growth factor receptor family; 2) two putative alpha-helical leucine zipper motifs separated by a 25-amino acid charged intermediate segment but lacking an NH2-terminal basic domain; and 3) COOH-terminal and NH2-terminal proline-rich domains suggestive of src homology 3 (SH3) domain binding regions. Rabbit polyclonal immune sera generated against a carboxyl-terminal bacterial fusion protein recognized a protein with an apparent molecular mass of 130 kDa in COS 7 cells that were transiently transfected with a full-length DLK cDNA expression vector. Moreover, COS 7 cells transiently transfected with an epitope-tagged DLK expression vector expressed protein with an apparent molecular mass of 130 kDa that became autophosphorylated on serine and threonine in an in vitro kinase assay. |
