Protein: Choline kinase alpha (CK) (EC 2.7.1.32) (CHETK-alpha) (Ethanolamine kinase) (EK) (EC 2.7.1.82) (Q01134)
Organism: Rattus norvegicus (Rat)
Function: Plays a key role in phospholipid biosynthesis by catalyzing the phosphorylation of free choline to phosphocholine, the first step in phosphatidylcholine biosynthesis. Also phosphorylates ethanolamine, thereby contributing to phosphatidylethanolamine biosynthesis. Has higher activity with choline. May contribute to tumor cell growth.
Subcellular location: Cytoplasm, cytosol {ECO:0000250|UniProtKB:P35790}.; SUBCELLULAR LOCATION: [Isoform 1]: Lipid droplet {ECO:0000250|UniProtKB:P35790}. Note=Isoform 1 localizes to lipid droplets following phosphorylation by AMPK. {ECO:0000250|UniProtKB:P35790}.
Sequence: MKTKFCTGGEAEPSPLGLLLSCGGSAAPTPGVGQQRDAAGELESKQLGGRSQPLALPPPPPPPLPLPPPPSPPLADEQPEPRTRRRAYLWCKEFLPGAWRGLREDQFHISVIRGGLSNMLFQCSLPDSIASVGDEPRKVLLRLYGAILKMRSCNKEGSEQAQNENEFQGAEAMVLESVMFAILAERSLGPKLYGIFPQGRLEQFIPSRRLDTEELCLPDISAEIAEKMATFHGMKMPFNKEPKWLFGTMEKYLNQVLRLKFSREARVQQLHKFLSYNLPLELENLRSLLQYTRSPVVFCHNDCQEGNILLLEGQENSEKQKLMLIDFEYSSYNYRGFDIGNHFCEWMYDYTYEKYPFFRANIQKYPTRKQQLHFISSYLTTFQNDFESLSSEEQSATKEDMLLEVNRFALASHFLWGLWSIVQAKISSIEFGYMEYAQARFDAYFDQKRKLGV
InterPro domains: - IPR011009: Protein kinase-like domain superfamily (homologous_superfamily) [77-451]
Interaction partners: - Ethanolamine-phosphate cytidylyltransferase
- Choline-phosphate cytidylyltransferase A
- Choline-phosphate cytidylyltransferase B
- Ethanolamine-phosphate phospho-lyase
- Glycerophosphocholine phosphodiesterase GPCPD1
- Choline/ethanolamine kinase
- Phosphoethanolamine/phosphocholine phosphatase
- Choline O-acetyltransferase
- Acetylcholinesterase
- Choline/ethanolaminephosphotransferase 1
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0003824 (catalytic activity), GO:0036094 (small molecule binding), GO:1901363 (heterocyclic compound binding), GO:0016740 (transferase activity), GO:0043167 (ion binding), GO:0097159 (organic cyclic compound binding), GO:0097367 (carbohydrate derivative binding), GO:1901265 (nucleoside phosphate binding), GO:0016772 (transferase activity, transferring phosphorus-containing groups), GO:0043168 (anion binding), GO:0000166 (nucleotide binding), GO:0032553 (ribonucleotide binding), GO:0035639 (purine ribonucleoside triphosphate binding), GO:0016301 (kinase activity), GO:0016773 (phosphotransferase activity, alcohol group as acceptor), GO:0032555 (purine ribonucleotide binding), GO:0017076 (purine nucleotide binding), GO:0005524 (ATP binding), GO:0032559 (adenyl ribonucleotide binding), GO:0030554 (adenyl nucleotide binding)
Biological Process (BP): GO:0008150 (biological process), GO:0050896 (response to stimulus), GO:0009605 (response to external stimulus), GO:0009719 (response to endogenous stimulus), GO:0009991 (response to extracellular stimulus), GO:0071495 (cellular response to endogenous stimulus), GO:0031667 (response to nutrient levels), GO:0070848 (response to growth factor), GO:0071363 (cellular response to growth factor stimulus), GO:1990089 (response to nerve growth factor), GO:1990090 (cellular response to nerve growth factor stimulus)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005829 (cytosol), GO:0005737 (cytoplasm), GO:0012505 (endomembrane system), GO:0005794 (Golgi apparatus), GO:0005783 (endoplasmic reticulum), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle)