Glucocorticoid biosynthesis

Summary
Organism
Homo sapiens (human)
Reactome
R-HSA-194002
PubChem
R-HSA-194002
Description
  • Cortisol, the major human glucocorticoid, is synthesized in the zona fasciculata of the adrenal cortex from pregnenolone. Pregnenolone is converted to 17alpha-hydoxyprogesterone in two reactions, both catalyzed by 3-beta-hydroxysteroid dehydrogenase/isomerase. 17Alpha-hydroxyprogesterone is hydroxylated by CYP21A2 to form 11-deoxycortisol, which in turn is converted to cortisol by CYP11B1. The conversion of the active steroid hormone, cortisol, to inactive cortisone occurs in many tissues, notably the liver (Payne and Hales 2004).
Click on a node on the pathway to see its details. Glycoproteins are marked with a glycoprotein icon in their name.
Displaying all 4 entries
UniProt ID Protein Name Gene Symbol Pathway Viewer
P01189 Pro-opiomelanocortin
  • POMC
view
P08185 Corticosteroid-binding globulin
  • CBG
  • SERPINA6
view
P26439 3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 2
  • HSD3B2
  • HSDB3B
view
P28845 11-beta-hydroxysteroid dehydrogenase 1
  • HSD11
  • HSD11B1
  • HSD11L
  • SDR26C1
view

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Acknowledgements

Supported by JST NBDC Grant Number JPMJND2204

Partly supported by NIH Common Fund Grant #1U01GM125267-01


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Last updated: April 6, 2026