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Androgen hormones are responsible for the development and maintenance of male phenotype and reproductive functions and a range of other processes in nonreproductive tissues. Testosterone, the main androgen, is primarily synthesized in the testes; others are synthesized in the adrenal gland and can be converted to testosterone in peripheral tissues. Like all steroid hormones, androgens are derived from cholesterol; their biosynthesis is tightly regulated by the hypothalamus-pituitary-gonadal axis

Pathway Diagram:

Ariadne Genomics Inc. Srd5a1 Srd5a2 Hsd17b2 Sts Sult2a1 e Cyp17a1 Por Fdx1 Fdxr e(3) Cyp11a1 cholesterol 17-hydroxypregnenolone ---> DHEA DHEA ---> DHEAS DHEAS ---> DHEA DHEA DHEAS DHEA ---> androstenediol Hsd17b3 NADP+ NADPH(3) ---> e(3) NADP+(3) NADPH(3) Star NADPH NADPH ---> e pregnenolone ---> 17-hydroxypregnenolone cholesterol ---> pregnenolone 17-hydroxypregnenolone androstenediol pregnenolone NADPH ---> NADP+ NADPH(3) ---> NADP+(3) Hsd3b2 Hsd3b1 testosterone ---> dihydrotestosterone DHEA ---> androstenedione androstenediol ---> testosterone testosterone androstenedione testosterone ---> androstenedione androstenedione ---> testosterone dihydrotestosterone

Genes in Pathway:

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testosterone biosynthetic pathway term browser
Symbol Object Name JBrowse Chr Start Stop Reference
G Cyp11a1 cytochrome P450, family 11, subfamily a, polypeptide 1 JBrowse link 8 62,798,317 62,809,848 RGD:2325883
G Cyp17a1 cytochrome P450, family 17, subfamily a, polypeptide 1 JBrowse link 1 266,422,127 266,429,947 RGD:2325883
G Fdx1 ferredoxin 1 JBrowse link 8 56,373,729 56,393,199 RGD:2325883
G Fdxr ferredoxin reductase JBrowse link 10 103,817,724 103,826,413 RGD:2325883
G Hsd17b2 hydroxysteroid (17-beta) dehydrogenase 2 JBrowse link 19 50,246,404 50,317,892 RGD:4889549
G Hsd17b3 hydroxysteroid (17-beta) dehydrogenase 3 JBrowse link 17 1,579,319 1,610,745 RGD:2325883
G Hsd3b1 hydroxy-delta-5-steroid dehydrogenase, 3 beta- and steroid delta-isomerase 1 RGD:4889549
G Hsd3b2 hydroxy-delta-5-steroid dehydrogenase, 3 beta- and steroid delta-isomerase 2 JBrowse link 2 200,712,895 200,722,429 RGD:4889549
G Por cytochrome p450 oxidoreductase JBrowse link 12 23,998,411 24,017,063 RGD:2325883
G Srd5a1 steroid 5 alpha-reductase 1 JBrowse link 1 36,320,504 36,354,694 RGD:2325883
G Srd5a2 steroid 5 alpha-reductase 2 JBrowse link 6 25,279,635 25,315,501 RGD:2325883
G Star steroidogenic acute regulatory protein JBrowse link 16 71,036,204 71,040,847 RGD:2325883
G Sts steroid sulfatase JBrowse link X 45,420,418 45,428,748 RGD:6893583
G Sult2a1 sulfotransferase family 2A member 1 JBrowse link 1 76,558,721 76,614,315 RGD:2325883

Additional Elements in Pathway:

(includes Gene Groups, Small Molecules, Other Pathways..etc.)
Object TypePathway ObjectPathway Object Description
Small MoleculeDHEAdehydroepiandrosterone

Pathway Gene Annotations

Disease Annotations Associated with Genes in the testosterone biosynthetic pathway
Disease TermsGene Symbols
17,20-Lyase Deficiency, IsolatedCyp17a1
17-Hydroxysteroid Dehydrogenase DeficiencyHsd17b3
46, XY Disorders of Sex DevelopmentCyp11a1
Adrenal Hyperplasia 2Hsd3b2
Adrenal Hyperplasia, Congenital, Type 5Cyp17a1
Adrenal InsufficiencyCyp11a1
alcoholic hepatitisSts
Alzheimer's diseaseHsd17b3 , Hsd3b1
amenorrheaCyp17a1 , Por
Antley-Bixler syndromePor
Antley-Bixler Syndrome with Genital Anomalies and Disordered SteroidogenesisPor
attention deficit hyperactivity disorderSts
autistic disorderSts
Brain InjuriesCyp11a1
breast cancerCyp17a1
breast carcinomaSrd5a1 , Srd5a2
Breast NeoplasmsCyp17a1
CardiomegalyCyp11a1 , Srd5a1 , Star
Cell Transformation, NeoplasticPor
congenital adrenal hyperplasiaCyp11a1 , Cyp17a1 , Hsd3b2 , Por , Star
congenital adrenal insufficiencyCyp11a1
cryptorchidismHsd3b2 , Sts
diabetes mellitusSrd5a2
Diabetes Mellitus, Experimental Cyp11a1 , Star , Sts
Endometrial NeoplasmsCyp11a1 , Hsd17b2 , Srd5a2 , Star
endometriosisHsd17b2 , Srd5a1 , Srd5a2
Experimental Liver CirrhosisCyp17a1 , Hsd17b2 , Srd5a1 , Sult2a1
fatty liver diseaseSts
Female InfertilityCyp17a1
Fetal Growth RetardationCyp11a1 , Star
gallbladder cancerCyp17a1
genetic diseaseFdxr , Hsd17b3 , Sts
Gonadal Dysgenesis, XX Type, with DeafnessCyp17a1
hepatocellular carcinomaCyp17a1 , Hsd3b2
hyperprolactinemiaHsd3b1 , Hsd3b2 , Srd5a1 , Srd5a2
hypertensionCyp11a1 , Hsd3b1 , Hsd3b2 , Sts
hypogonadismCyp11a1 , Cyp17a1 , Hsd3b1 , Star
hypospadiasHsd3b1 , Hsd3b2 , Srd5a2
hypothyroidismHsd3b1 , Srd5a1 , Star
Insulin ResistanceSts
intellectual disabilitySrd5a1
learning disabilityPor
Lipoid Congenital Adrenal HyperplasiaCyp11a1 , Star
male infertilityCyp17a1
malignant gliomaHsd3b2
malignant hypertensionCyp17a1
melanomaCyp17a1 , Srd5a2
Musculoskeletal AbnormalitiesPor
nephrosisCyp11a1 , Star
neural tube defectPor
nonalcoholic fatty liver diseaseCyp17a1
obesitySrd5a1 , Sts
ovarian cystCyp17a1
pancreatic cancerCyp17a1
Paranoid DisordersHsd3b2
Penis AgenesisSrd5a2
pleomorphic xanthoastrocytomaPor
polycystic ovary syndromeCyp17a1 , Hsd3b1 , Hsd3b2 , Srd5a1 , Star
prostate cancerCyp17a1 , Srd5a1 , Srd5a2 , Sult2a1
prostatic hypertrophySrd5a1 , Srd5a2
Prostatic NeoplasmsCyp17a1 , Hsd17b3 , Hsd3b1 , Hsd3b2 , Srd5a1 , Srd5a2 , Sult2a1
Pseudovaginal Perineoscrotal HypospadiasSrd5a2
rheumatoid arthritisSts
schizophreniaCyp11a1 , Sts
sciatic neuropathyCyp11a1 , Cyp17a1 , Hsd3b1
sex development disorderHsd17b3
sexual disorderCyp17a1
status epilepticusCyp11a1
type 2 diabetes mellitusCyp11a1 , Hsd17b3 , Hsd3b1 , Srd5a1 , Star
urinary bladder cancerPor
visual epilepsyCyp11a1
Weight GainSts
X-linked ichthyosisSts
Pathway Annotations Associated with Genes in the testosterone biosynthetic pathway

References Associated with the testosterone biosynthetic pathway:

Ontology Path Diagram:

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