Protein: Probable tetraacyldisaccharide 4'-kinase, mitochondrial (EC 2.7.1.130) (Protein LIPID X 4'-kinase) (AtLpxK) (Q8LEA0)
Organism: Arabidopsis thaliana (Mouse-ear cress)
Function: Involved in the biosynthesis of lipid A, a phosphorylated glycolipid that in bacteria anchors the lipopolysaccharide to the outer membrane of the cell. Transfers the gamma-phosphate of ATP to the 4'-position of a tetraacyldisaccharide 1-phosphate intermediate (termed DS-1-P) to form tetraacyldisaccharide 1,4'-bis-phosphate (lipid IVA). Lipid A-like molecules in plants may serve as structural components of the outer membranes of mitochondria and/or chloroplasts, or may be involved in signal transduction or plant defense responses (Potential).
Subcellular location: Mitochondrion {ECO:0000269|PubMed:21709257}.
Sequence: MEKLRKVVNEIAYTRVHTNSPALHRSLVPFLTIASSLYGVALQIRRSLYRYSLLQKHRLPVPVISVGNLSWGGNGKTPMVEYISQFLVDSGLTPLILTRGYAGGDEVKMLERHLRGGPVKIGVGANRAATAALFLDKYGCVDSSSLRSFFDLHERAQVWTISEKIGCIILDDGMQHWSLSRDLEIVMLNGLNPWGNGHLMPHGPLREPLLALERADVAVVHHVDLITKQSLRDIENMIQGFKKSIPIFYSKMVPKYLFDVKNARSHVALEALRCASVLCVSAIGSADAFVKSIEMTGAHYVDRLDFSDHHLFEAEDVETMSRRAKGLEHKSNCKPIIVVTEKDYDRDPEILKCLDSYTVLVLCSELQITPILETDVDSFNYTLMKALAAKFYVSS
InterPro domains: - IPR003758: Tetraacyldisaccharide 4'-kinase (family) [1-388]
Interaction partners: - Probable UDP-3-O-acylglucosamine N-acyltransferase 1, mitochondrial
- Probable lipid-A-disaccharide synthase, mitochondrial
- Probable UDP-3-O-acylglucosamine N-acyltransferase 2, mitochondrial
- Probable UDP-3-O-acyl-N-acetylglucosamine deacetylase 5, mitochondrial
- Probable UDP-3-O-acyl-N-acetylglucosamine deacetylase 2, mitochondrial
- Probable UDP-3-O-acyl-N-acetylglucosamine deacetylase 3, mitochondrial
- Probable acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine O-acyltransferase, mitochondrial
- Probable 3-deoxy-D-manno-octulosonic acid transferase, mitochondrial
- Probable UDP-3-O-acyl-N-acetylglucosamine deacetylase 1, mitochondrial
- Is a member of the PF|00364 Biotin-requiring enzymes family
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0003824 (catalytic activity), GO:0016491 (oxidoreductase activity), GO:0016651 (oxidoreductase activity, acting on NAD(P)H)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0009058 (biosynthetic process), GO:0044237 (cellular metabolic process), GO:0071704 (organic substance metabolic process), GO:0042440 (pigment metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0044249 (cellular biosynthetic process), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:1901564 (organonitrogen compound metabolic process), GO:1901576 (organic substance biosynthetic process), GO:0042168 (heme metabolic process), GO:0046483 (heterocycle metabolic process), GO:0046148 (pigment biosynthetic process), GO:1901566 (organonitrogen compound biosynthetic process), GO:1901362 (organic cyclic compound biosynthetic process), GO:0044271 (cellular nitrogen compound biosynthetic process), GO:0033013 (tetrapyrrole metabolic process), GO:0019438 (aromatic compound biosynthetic process), GO:0018130 (heterocycle biosynthetic process), GO:0006783 (heme biosynthetic process), GO:0006778 (porphyrin-containing compound metabolic process), GO:0033014 (tetrapyrrole biosynthetic process), GO:0006779 (porphyrin-containing compound biosynthetic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0031975 (envelope), GO:0016020 (membrane), GO:0005737 (cytoplasm), GO:0031090 (organelle membrane), GO:0031967 (organelle envelope), GO:0005739 (mitochondrion), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0005740 (mitochondrial envelope), GO:0019866 (organelle inner membrane), GO:0043231 (intracellular membrane-bounded organelle), GO:0031966 (mitochondrial membrane), GO:0005743 (mitochondrial inner membrane)