Glycoprotein hormone beta-5
experimentalAlso known as: Thyrostimulin subunit beta, GPHB5, Q86YW7
Glycoprotein hormone beta-5 (GPHB5), also known as thyrostimulin subunit beta, forms a heterodimer with glycoprotein hormone alpha-2 (GPHA2) to create thyrostimulin. This complex binds to and activates the thyroid-stimulating hormone receptor (TSHR), initiating a signaling cascade that increases intracellular cyclic AMP (cAMP) production. Unlike classical TSH, thyrostimulin exhibits broader tissue expression, suggesting potential roles beyond thyroid regulation. Current research on GPHB5 remains at an experimental stage, with only two PubMed-indexed studies available. Preliminary findings indicate that thyrostimulin may influence energy metabolism and bone remodeling, as TSHR is expressed in osteoclasts and adipocytes. However, the physiological significance of GPHB5 in humans is not yet established, and its precise role in endocrine or paracrine signaling requires further investigation. Given the limited evidence, GPHB5 has no established clinical applications. Its potential relevance to thyroid disorders, metabolic diseases, or bone pathology remains speculative. For research purposes only — not medical advice.
Key data
MKLAFLFLGPMALLLLAGYGCVLGASSGNLRTFVGCAVREFTFLAKKPGCRGLRITTDACWGRCETWEKPILEPPYIEAHHRVCTYNETKQVTVKLPNCAPGVDPFYTYPVAIRCDCGACSTATTECETIMechanism of action
Functions as a heterodimeric glycoprotein hormone with GPHA2 able to bind and activate the thyroid-stimulating hormone receptor (TSHR), leading to increased cAMP production. Plays a central role in controlling thyroid cell metabolism
Research & studies
Genomic regions on several chromosomes were associated with iteroparous spawning phenology in female steelhead trout.; A region on chromosome 25 containing ER and GPHB5 genes differed in allele frequencies among females of different age-at-maturity, but not males.; The ER/GPHB5 region shared an island of linkage disequilibrium with the SIX6 gene, a known age-at-maturity locus.; Results suggest overlapping genetic pathways between age-at-maturity and iteroparity phenology.
Frequently asked questions
What is Glycoprotein hormone beta-5?
Glycoprotein hormone beta-5 (GPHB5), also known as thyrostimulin subunit beta, forms a heterodimer with glycoprotein hormone alpha-2 (GPHA2) to create thyrostimulin. This complex binds to and activates the thyroid-stimulating hormone receptor (TSHR), initiating a signaling cascade that increases intracellular cyclic AM
How does Glycoprotein hormone beta-5 work?
Functions as a heterodimeric glycoprotein hormone with GPHA2 able to bind and activate the thyroid-stimulating hormone receptor (TSHR), leading to increased cAMP production. Plays a central role in controlling thyroid cell metabolism
What is the research status of Glycoprotein hormone beta-5?
Glycoprotein hormone beta-5 is currently classified as experimental, with 2 research references on record. This is for research purposes only and is not medical advice.
What is the molecular weight of Glycoprotein hormone beta-5?
Glycoprotein hormone beta-5 has a molecular weight of approximately 14232 g/mol.
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