Apolipoprotein D is a protein that in humans is encoded by the APODgene. Unlike other lipoproteins, which are mainly produced in the liver, apolipoprotein D is mainly produced in the brain and testes.
Apolipoprotein D (Apo-D) is a component of high-density lipoprotein that has no marked similarity to other apolipoprotein sequences. It has a high degree of homology to plasma retinol-binding protein and other members of the alpha 2 microglobulin protein superfamily of carrier proteins, also known as lipocalins. It is a glycoprotein of estimated molecular weight 33 KDa. Apo-D is closely associated with the enzyme lecithin:cholesterol acyltransferase - an enzyme involved in lipoprotein metabolism. ApoD has also been shown to be an important link in the transient interaction between HDL and LDL particles and between HDL particles and cells.
APOD is a biomarker of androgen insensitivity syndrome (AIS). APOD is an androgen up-regulated gene in normal scrotal fibroblast cells in comparison to CAIS labia majora cells.
↑Appari M, Werner R, Wünsch L, Cario G, Demeter J, Hiort O, Riepe F, Brooks JD, Holterhus PM (June 2009). "Apolipoprotein D (APOD) is a putative biomarker of androgen receptor function in androgen insensitivity syndrome". J. Mol. Med. 87 (6): 623–32. doi:10.1007/s00109-009-0462-3. PMID19330472.
Yang CY, Gu ZW, Blanco-Vaca F, et al. (1994). "Structure of human apolipoprotein D: locations of the intermolecular and intramolecular disulfide links". Biochemistry. 33 (41): 12451–5. doi:10.1021/bi00207a011. PMID7918467.
Holzfeind P, Merschak P, Dieplinger H, Redl B (1996). "The human lacrimal gland synthesizes apolipoprotein D mRNA in addition to tear prealbumin mRNA, both species encoding members of the lipocalin superfamily". Exp. Eye Res. 61 (4): 495–500. doi:10.1016/S0014-4835(05)80145-9. PMID8549691.
Cargill M, Altshuler D, Ireland J, et al. (1999). "Characterization of single-nucleotide polymorphisms in coding regions of human genes". Nat. Genet. 22 (3): 231–8. doi:10.1038/10290. PMID10391209.
Liu Z, Chang GQ, Leibowitz SF (2001). "Apolipoprotein D interacts with the long-form leptin receptor: a hypothalamic function in the control of energy homeostasis". FASEB J. 15 (7): 1329–31. doi:10.1096/fj.00-0530fje. PMID11344130.
Desai PP, Hendrie HC, Evans RM, et al. (2003). "Genetic variation in apolipoprotein D affects the risk of Alzheimer disease in African-Americans". Am. J. Med. Genet. B Neuropsychiatr. Genet. 116 (1): 98–101. doi:10.1002/ajmg.b.10798. PMID12497622.
Thomas EA, Laws SM, Sutcliffe JG, et al. (2003). "Apolipoprotein D levels are elevated in prefrontal cortex of subjects with Alzheimer's disease: no relation to apolipoprotein E expression or genotype". Biol. Psychiatry. 54 (2): 136–41. doi:10.1016/S0006-3223(02)01976-5. PMID12873803.