Entry
Name
GnRH signaling pathway - Xenopus laevis (African clawed frog)
Description
Gonadotropin-releasing hormone (GnRH) secretion from the hypothalamus acts upon its receptor in the anterior pituitary to regulate the production and release of the gonadotropins, LH and FSH. The GnRHR is coupled to Gq/11 proteins to activate phospholipase C which transmits its signal to diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3). DAG activates the intracellular protein kinase C (PKC) pathway and IP3 stimulates release of intracellular calcium. In addition to the classical Gq/11, coupling of Gs is occasionally observed in a cell-specific fashion. Signaling downstream of protein kinase C (PKC) leads to transactivation of the epidermal growth factor (EGF) receptor and activation of mitogen-activated protein kinases (MAPKs), including extracellular-signal-regulated kinase (ERK), Jun N-terminal kinase (JNK) and p38 MAPK. Active MAPKs translocate to the nucleus, resulting in activation of transcription factors and rapid induction of early genes.
Class
Organismal Systems; Endocrine system
BRITE hierarchy
Pathway map
Organism
Xenopus laevis (African clawed frog) [GN:
xla ]
Gene
100190767 elk1.S; ELK1, member of ETS oncogene family S homeolog [KO:K04375 ]
100381134 cacna1s.S; voltage-dependent L-type calcium channel subunit alpha-1S [KO:K04857 ]
100462911 cacna1c.S; voltage-dependent L-type calcium channel subunit alpha-1C isoform X11 [KO:K04850 ]
100462912 cacna1d.L; voltage-dependent L-type calcium channel subunit alpha-1D isoform X1 [KO:K04851 ]
100462913 cacna1f.L; voltage-dependent L-type calcium channel subunit alpha-1D isoform X3 [KO:K04853 ]
108696257 camk2g.L; calcium/calmodulin-dependent protein kinase type II subunit gamma isoform X1 [KO:K04515 ] [EC:2.7.11.17 ]
108697660 cdc42.S; cell division control protein 42 homolog isoform X1 [KO:K04393 ]
108698108 elk1.L; ETS domain-containing protein Elk-1 isoform X2 [KO:K04375 ]
108704565 cacna1c.L; voltage-dependent L-type calcium channel subunit alpha-1C isoform X1 [KO:K04850 ]
108712658 map2k7.S; dual specificity mitogen-activated protein kinase kinase 7 isoform X1 [KO:K04431 ] [EC:2.7.12.2 ]
108713286 hbegf.S; proheparin-binding EGF-like growth factor isoform X1 [KO:K08523 ]
108716399 plcb4.L; 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-4 isoform X3 [KO:K05858 ] [EC:3.1.4.11 ]
373765 gnrhr1-A; gonadotropin releasing hormone receptor type I [KO:K04280 ]
373823 gnrhr.L; gonadotropin releasing hormone receptor L homeolog [KO:K04280 ]
373843 lhb.L; luteinizing hormone subunit beta L homeolog precursor [KO:K08521 ]
379055 cdc42.L; cell division cycle 42 L homeolog [KO:K04393 ]
379991 map2k1.L; dual specificity mitogen-activated protein kinase kinase 1 [KO:K04368 ] [EC:2.7.12.2 ]
380388 prkacb.S; protein kinase cAMP-activated catalytic subunit beta S homeolog [KO:K04345 ] [EC:2.7.11.11 ]
380508 camk2g.S; calcium/calmodulin dependent protein kinase (CaM kinase) II gamma S homeolog [KO:K04515 ] [EC:2.7.11.17 ]
380535 gna11.S; guanine nucleotide binding protein (G protein), alpha 11 (Gq class) S homeolog [KO:K04635 ]
394391 map2k7.L; dual specificity mitogen-activated protein kinase kinase 7 [KO:K04431 ] [EC:2.7.12.2 ]
394414 gnas.S; guanine nucleotide-binding protein G(s) subunit alpha [KO:K04632 ]
394425 gnaq.L; guanine nucleotide binding protein (G protein), q polypeptide L homeolog [KO:K04634 ]
397771 kras.L; kirsten rat sarcoma viral oncogene homolog L homeolog [KO:K07827 ]
397789 camk2b.L; calcium/calmodulin dependent protein kinase (CaM kinase) II beta L homeolog [KO:K04515 ] [EC:2.7.11.17 ]
398376 camk2d.L; calcium/calmodulin-dependent protein kinase type II delta chain-like isoform X8 [KO:K04515 ] [EC:2.7.11.17 ]
398804 atf4.L; activating transcription factor 4 L homeolog [KO:K04374 ]
399059 gnas.L; uncharacterized protein LOC399059 [KO:K04632 ]
399160 camk2d.S; calcium/calmodulin-dependent protein kinase type II delta chain [KO:K04515 ] [EC:2.7.11.17 ]
399162 egr1.L; early growth response protein 1-A [KO:K09203 ]
399254 itpr1.S; inositol 1,4,5-trisphosphate receptor type 1 S homeolog [KO:K04958 ]
399261 gnaq.S; guanine nucleotide-binding protein G(q) subunit alpha [KO:K04634 ]
399406 hras.L; Harvey rat sarcoma viral oncogene homolog L homeolog [KO:K02833 ]
399458 grb2.L; growth factor receptor-bound protein 2-A [KO:K04364 ]
399471 map2k4.L; dual specificity mitogen-activated protein kinase kinase 2 [KO:K04430 ] [EC:2.7.12.2 ]
407843 fshb.L; follicle stimulating hormone subunit beta L homeolog precursor [KO:K05250 ]
414518 egr1.S; early growth response protein 1-B [KO:K09203 ]
431908 map2k4.S; dual specificity mitogen-activated protein kinase kinase 2-like [KO:K04430 ] [EC:2.7.12.2 ]
432256 cga.L; glycoprotein hormones, alpha polypeptide L homeolog precursor [KO:K08522 ]
444095 grb2.S; growth factor receptor-bound protein 2-B [KO:K04364 ]
445848 plcb4.S; 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-4 isoform X1 [KO:K05858 ] [EC:3.1.4.11 ]
733258 plcb1.S; 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-1 isoform X1 [KO:K05858 ] [EC:3.1.4.11 ]
734165 atf4.S; activating transcription factor 4 S homeolog [KO:K04374 ]
734336 map3k22.L; mitogen-activated protein kinase kinase kinase 22 L homeolog [KO:K04421 ] [EC:2.7.11.25 ]
779103 gna11.L; guanine nucleotide-binding protein subunit alpha-11 [KO:K04635 ]
Compound
C01245 D-myo-Inositol 1,4,5-trisphosphate
Reference
Authors
Ruf F, Sealfon SC.
Title
Genomics view of gonadotrope signaling circuits.
Journal
Reference
Authors
Harrison GS, Wierman ME, Nett TM, Glode LM.
Title
Gonadotropin-releasing hormone and its receptor in normal and malignant cells.
Journal
Reference
Authors
Pawson AJ, McNeilly AS.
Title
The pituitary effects of GnRH.
Journal
Reference
Authors
DeGroot LJ, Jameson JL (ed).
Title
Endocrinology (Fifth edition)
Journal
Elsevier Saunders (2006)
Reference
Authors
Naor Z, Benard O, Seger R.
Title
Activation of MAPK cascades by G-protein-coupled receptors: the case of gonadotropin-releasing hormone receptor.
Journal
Reference
Authors
Ruf F, Fink MY, Sealfon SC.
Title
Structure of the GnRH receptor-stimulated signaling network: insights from genomics.
Journal
Reference
Authors
Farshori PQ, Shah BH, Arora KK, Martinez-Fuentes A, Catt KJ.
Title
Activation and nuclear translocation of PKCdelta, Pyk2 and ERK1/2 by gonadotropin releasing hormone in HEK293 cells.
Journal
Reference
Authors
Shah BH, Catt KJ.
Title
Matrix metalloproteinases in reproductive endocrinology.
Journal
Reference
Authors
Roelle S, Grosse R, Aigner A, Krell HW, Czubayko F, Gudermann T.
Title
Matrix metalloproteinases 2 and 9 mediate epidermal growth factor receptor transactivation by gonadotropin-releasing hormone.
Journal
Reference
Authors
Naor Z
Title
Signaling by G-protein-coupled receptor (GPCR): studies on the GnRH receptor.
Journal
Related pathway
xla04060 Cytokine-cytokine receptor interaction
xla04080 Neuroactive ligand-receptor interaction
KO pathway