Defective CYP1B1 does not 4-hydroxylate EST17b

Stable Identifier
Reaction [transition]
Homo sapiens
Locations in the PathwayBrowser
SVG |   | PPTX  | SBGN
Click the image above or here to open this reaction in the Pathway Browser
The layout of this reaction may differ from that in the pathway view due to the constraints in pathway layout

Cytochrome P450 1B1 (CYP1B1) can oxidise a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics as well as activating a range of procarcinogens. A specific substrate is the female sex hormone estradiol-17beta (EST17b) which is 4-hydroxylated to 4-hydroxyestradiol-17beta 4OH-EST17b) (Badawi et al. 2001). Defects in CYP1B1 can cause glaucoma disorders such as Glaucoma 3, primary congenital, A (GLC3A; MIM:231300), Glaucoma, primary open angle (POAG; MIM:137760), Glaucoma 1, open angle, A (GLC1A; MIM:137750) and Peters anomaly (PAN; MIM:604229). These disorders cause a progressive optic neuropathy characterised by visual field defects that ultimately lead to irreversible blindness. Common mutations causing GLC3A include G61E, E387K, R368H, R390H and R469W (Bejjani et al. 1998, Plasilova et al. 1999, Vincent et al. 2002, Passuto et al. 2010). A loss-of-function mutation causing POAG is P52L (Passuto et al. 2010). A mutation causing GLC1A is V432L (Vincent et al. 2002). Mutations causing PAN are M1T and W57* (Vincent et al. 2001).

Literature References
PubMed ID Title Journal Year
19643970 Heterozygous loss-of-function variants in CYP1B1 predispose to primary open-angle glaucoma

Pasutto, F, Chavarria-Soley, G, Mardin, CY, Michels-Rautenstrauss, K, Ingelman-Sundberg, M, Fernández-Martínez, L, Weber, BH, Rautenstrauss, B, Reis, A

Invest. Ophthalmol. Vis. Sci. 2010
9463332 Mutations in CYP1B1, the gene for cytochrome P4501B1, are the predominant cause of primary congenital glaucoma in Saudi Arabia

Bejjani, BA, Lewis, RA, Tomey, KF, Anderson, KL, Dueker, DK, Jabak, M, Astle, WF, Otterud, B, Leppert, M, Lupski, JR

Am. J. Hum. Genet. 1998
11774072 Digenic inheritance of early-onset glaucoma: CYP1B1, a potential modifier gene

Vincent, AL, Billingsley, G, Buys, Y, Levin, AV, Priston, M, Trope, G, Williams-Lyn, D, Héon, E

Am. J. Hum. Genet. 2002
11403040 Phenotypic heterogeneity of CYP1B1: mutations in a patient with Peters' anomaly

Vincent, A, Billingsley, G, Priston, M, Williams-Lyn, D, Sutherland, J, Glaser, T, Oliver, E, Walter, MA, Heathcote, G, Levin, A, Héon, E

J. Med. Genet. 2001
11555828 Role of human cytochrome P450 1A1, 1A2, 1B1, and 3A4 in the 2-, 4-, and 16alpha-hydroxylation of 17beta-estradiol

Badawi, AF, Cavalieri, EL, Rogan, EG

Metabolism 2001
10227395 Identification of a single ancestral CYP1B1 mutation in Slovak Gypsies (Roms) affected with primary congenital glaucoma

Plásilová, M, Stoilov, I, Sarfarazi, M, Kádasi, L, Feráková, E, Ferák, V

J. Med. Genet. 1999
Participant Of
Catalyst Activity
Catalyst Activity
monooxygenase activity of CYP1B1 mutants [endoplasmic reticulum membrane]
Physical Entity
Normal reaction
Name Identifier Synonyms
primary congenital glaucoma 0050593
glaucoma 1686
open-angle glaucoma 1067 Open-angle glaucoma, unspecified, Open-angle glaucoma NOS (disorder), Glaucoma simplex, Pigmentary glaucoma (disorder), Pigmentary glaucoma, Open Angle Glaucoma, Open-angle glaucoma, Unspecified open-angle glaucoma (disorder), Pigmentary glaucoma, Wide-angle glaucoma NOS, Open-angle glaucoma (disorder)
primary open angle glaucoma 1070 primary open angle glaucoma, primary Open Angle Glaucoma, chronic simple glaucoma, primary open-angle glaucoma
Cite Us!