Mapping the human growth hormone-releasing hormone receptor (GHRHR) gene to the short arm of chromosome 7(7p13-p21) near the epidermal growth factor receptor (EGFR) gene
- National Institutes of Health, Bethesda, MA (United States)
- Universitat Marburg (Germany)
- Hospital for Sick Children, Toronto, Ontario (Canada)
- Univ. of Athens Medical School (Greece)
- American Type Culture Collection, Rockville, MD (United States)
In this report, the authors have assigned the human GHRHR gene to chromosome 7p13-p21, using polymerase chain reaction (PCR) amplification of DNA from well-defined human-rodent somatic cell hybrids. The GHRHR gene was assigned to human chromosome 7 by discordancy analysis (data not shown) of PCR amplification products from NIGMS mapping panel Nos. 1 and 2 DNA templates. The PCR primers (p[sub f], 5[prime]-GCTGCCTCATCACGCCACTGGAGTCCAC-3[prime]; and P[sub r], 5[prime]-CAGGTTTATTGGCTCCTCTGAGCCTTGG-3[prime]) amplified a 276-bp-long fragment from the 3[prime] untranslated region of the human GHRHR gene. Subsequently, they determined the location of the GHRHR gene within human chromosome 7 by PCR amplification of genomic DNA template from somatic cell hybrids that contain deletions of this chromosome. Amplification of the 276-bp DNA fragment was seen only in the cell lines that contained an intact chromosome 7 short arm. The lack of amplification using genomic DNA from 0044 Rag 1-15 and It A9 2-21-14 maps this gene to 7p13-p21. Additionally, the appropriate amplified product was observed from the human chromosome 4 containing NIGMS panel 2 cell line GM10115. This line was reported to have retained a small region of human chromosome 7 containing the epidermal growth factor receptor (EGFR) gene that is mapped to 7p12-p13. The authors conclude that the human GHRHR gene maps to the small arm of chromosome 7 within 7p13-p21 and close to the EGFR gene. This assignment is consistent with the syntenic relationship between mouse chromosome 6 and human chromosome 7 in this region.
- DOE Contract Number:
- FG05-91ER61232
- OSTI ID:
- 7062321
- Journal Information:
- Genomics; (United States), Vol. 20:2; ISSN 0888-7543
- Country of Publication:
- United States
- Language:
- English
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