CGB1

Chorionic gonadotropin, beta polypeptide 1
PDB rendering based on 1hcn.
Available structures PDB List of PDB id codes 1hcn​, 1hrp​, 1qfw​
Identifiers
Symbols	CGB1 ;
External IDs	Template:OMIM5
Gene ontology
RNA expression pattern
More reference expression data
Orthologs
Template:GNF Ortholog box
Species	Human	Mouse
Entrez	n/a	n/a
Ensembl	n/a	n/a
UniProt	n/a	n/a
RefSeq (mRNA)	n/a	n/a
RefSeq (protein)	n/a	n/a
Location (UCSC)	n/a	n/a
PubMed search	n/a	n/a

Chorionic gonadotropin, beta polypeptide 1, also known as CGB1, is a human gene.

The beta subunit of chorionic gonadotropin (CGB) is encoded by six highly homologous and structurally similar genes that are arranged in tandem and inverted pairs on chromosome 19q13.3, and contiguous with the luteinizing hormone beta (LHB) subunit gene. The CGB genes are primarily distinguished by differences in the 5' untranscribed region. This gene was originally thought to be one of the two pseudogenes (CGB1 and CGB2) of CGB subunit, however, detection of CGB1 and CGB2 transcripts in vivo, and their presence on the polysomes, suggested that these transcripts are translated. To date, a protein product corresponding to CGB1 has not been isolated. The deduced sequence of the hypothetical protein of 132 aa does not share any similarity with that of functional CGB subunits (PMID 8954017). However, a 155 aa protein, translated from a different frame, is about the same size, and shares 98% identity with other CGB subunits.

Further reading

• Bo M, Boime I (1992). "Identification of the transcriptionally active genes of the chorionic gonadotropin beta gene cluster in vivo". J. Biol. Chem. 267 (5): 3179–84. PMID 1371113.
• Policastro PF, Daniels-McQueen S, Carle G, Boime I (1986). "A map of the hCG beta-LH beta gene cluster". J. Biol. Chem. 261 (13): 5907–16. PMID 2422163.CS1 maint: Multiple names: authors list (link)
• Jameson JL, Lindell CM (1989). "Isolation and characterization of the human chorionic gonadotropin beta subunit (CG beta) gene cluster: regulation of transcriptionally active CG beta gene by cyclic AMP". Mol. Cell. Biol. 8 (12): 5100–7. PMID 2468994.
• Policastro P, Ovitt CE, Hoshina M; et al. (1983). "The beta subunit of human chorionic gonadotropin is encoded by multiple genes". J. Biol. Chem. 258 (19): 11492–9. PMID 6194155.CS1 maint: Explicit use of et al. (link) CS1 maint: Multiple names: authors list (link)
• Julier C, Weil D, Couillin P; et al. (1984). "The beta chorionic gonadotropin-beta luteinizing gene cluster maps to human chromosome 19". Hum. Genet. 67 (2): 174–7. PMID 6204923.CS1 maint: Explicit use of et al. (link) CS1 maint: Multiple names: authors list (link)
• Talmadge K, Boorstein WR, Vamvakopoulos NC; et al. (1985). "Only three of the seven human chorionic gonadotropin beta subunit genes can be expressed in the placenta". Nucleic Acids Res. 12 (22): 8415–36. PMID 6209613.CS1 maint: Explicit use of et al. (link) CS1 maint: Multiple names: authors list (link)
• Talmadge K, Boorstein WR, Fiddes JC (1984). "The human genome contains seven genes for the beta-subunit of chorionic gonadotropin but only one gene for the beta-subunit of luteinizing hormone". DNA. 2 (4): 281–9. PMID 6319099.CS1 maint: Multiple names: authors list (link)
• Talmadge K, Vamvakopoulos NC, Fiddes JC (1984). "Evolution of the genes for the beta subunits of human chorionic gonadotropin and luteinizing hormone". Nature. 307 (5946): 37–40. PMID 6690982.CS1 maint: Multiple names: authors list (link)
• Dirnhofer S, Hermann M, Hittmair A; et al. (1997). "Expression of the human chorionic gonadotropin-beta gene cluster in human pituitaries and alternate use of exon 1". J. Clin. Endocrinol. Metab. 81 (12): 4212–7. PMID 8954017.CS1 maint: Explicit use of et al. (link) CS1 maint: Multiple names: authors list (link)
• Venter JC, Adams MD, Myers EW; et al. (2001). "The sequence of the human genome". Science. 291 (5507): 1304–51. doi:10.1126/science.1058040. PMID 11181995.CS1 maint: Explicit use of et al. (link) CS1 maint: Multiple names: authors list (link)
• Giovangrandi Y, Parfait B, Asheuer M; et al. (2001). "Analysis of the human CGB/LHB gene cluster in breast tumors by real-time quantitative RT-PCR assays". Cancer Lett. 168 (1): 93–100. PMID 11368883.CS1 maint: Explicit use of et al. (link) CS1 maint: Multiple names: authors list (link)
• Strausberg RL, Feingold EA, Grouse LH; et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMID 12477932.CS1 maint: Explicit use of et al. (link) CS1 maint: Multiple names: authors list (link)
• Hallast P, Rull K, Laan M (2007). "The evolution and genomic landscape of CGB1 and CGB2 genes". Mol. Cell. Endocrinol. 260-262: 2–11. doi:10.1016/j.mce.2005.11.049. PMID 17055150.CS1 maint: Multiple names: authors list (link)