Accepted name: low-density-lipoprotein receptor kinase
Reaction: ATP + [low-density-lipoprotein receptor]-L-serine = ADP + [low-density-lipoprotein receptor]-O-phospho-L-serine
Other name(s): ATP:low-density-lipoprotein-L-serine O-phosphotransferase; LDL receptor kinase; [low-density-lipoprotein] kinase; low-density lipoprotein kinase; low-density-lipoprotein receptor kinase (phosphorylating); STK7
Systematic name: ATP:[low-density-lipoprotein receptor]-L-serine O-phosphotransferase
Comments: Phosphorylates the last serine residue (Ser-833) in the cytoplasmic domain of the low-density lipoprotein receptor from bovine adrenal cortex. Casein can also act as a substrate but with lower affinity. GTP can act instead of ATP.
1.  Kishimoto, A., Brown, M.S., Slaughter, C.A. and Goldstein, J.L. Phosphorylation of serine 833 in cytoplasmic domain of low density lipoprotein receptor by a high molecular weight enzyme resembling casein kinase II. J. Biol. Chem. 262 (1987) 1344–1351. [PMID: 3100530]
2.  Kishimoto, A., Goldstein, J.L. and Brown, M.S. Purification of catalytic subunit of low density lipoprotein receptor kinase and identification of heat-stable activator protein. J. Biol. Chem. 262 (1987) 9367–9373. [PMID: 3597414]
[EC created 1990 as EC, transferred 2005 to EC]

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