The product of this gene belongs to a small family of adaptor proteins that are known to interact with a number of receptor tyrosine kinases and signaling molecules. This gene encodes a growth factor receptor-binding protein that interacts with epidermal growth factor receptor (EGFR) and ephrin receptors. The protein plays a role in the integrin signaling pathway and cell migration by binding with focal adhesion kinase (FAK). Alternative splicing results in multiple transcript variants encoding different isoforms, although the full-length natures of only two of the variants have been determined to date.[5]
Clinical significance[]
GRB7 is an SH2-domain adaptor protein that binds to receptor tyrosine kinases and provides the intra-cellular direct link to the Rasproto-oncogene.
Human GRB7 is located on the long arm of chromosome 17, next to the ERBB2 (alias HER2/neu) proto-oncogene.
These two genes are commonly co-amplified (present in excess copies) in breast cancers.
GRB7 thought to be involved in migration[citation needed], is well known to be over-expressed in testicular germ cell tumors, esophageal cancers, and gastric cancers.
Model organisms have been used in the study of GRB7 function. A conditional knockout mouse line called Grb7tm1b(EUCOMM)Wtsi was generated at the Wellcome Trust Sanger Institute.[12] Male and female animals underwent a standardized phenotypic screen[13] to determine the effects of deletion.[14][15][16][17] Additional screens performed: - In-depth immunological phenotyping[18]
^Vayssière B, Zalcman G, Mahé Y, Mirey G, Ligensa T, Weidner KM, Chardin P, Camonis J (Feb 2000). "Interaction of the Grb7 adapter protein with Rnd1, a new member of the Rho family". FEBS Letters. 467 (1): 91–6. doi:10.1016/s0014-5793(99)01530-6. PMID10664463. S2CID4901644.
^Gerdin AK (2010). "The Sanger Mouse Genetics Programme: high throughput characterisation of knockout mice". Acta Ophthalmologica. 88: 925–7. doi:10.1111/j.1755-3768.2010.4142.x. S2CID85911512.
Maruyama K, Sugano S (Jan 1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID8125298.
Tanaka S, Mori M, Akiyoshi T, Tanaka Y, Mafune K, Wands JR, Sugimachi K (Jan 1997). "Coexpression of Grb7 with epidermal growth factor receptor or Her2/erbB2 in human advanced esophageal carcinoma". Cancer Research. 57 (1): 28–31. PMID8988034.
Kishi T, Sasaki H, Akiyama N, Ishizuka T, Sakamoto H, Aizawa S, Sugimura T, Terada M (Mar 1997). "Molecular cloning of human GRB-7 co-amplified with CAB1 and c-ERBB-2 in primary gastric cancer". Biochemical and Biophysical Research Communications. 232 (1): 5–9. doi:10.1006/bbrc.1997.6218. PMID9125150.
Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, Suyama A, Sugano S (Oct 1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene. 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID9373149.
Vayssière B, Zalcman G, Mahé Y, Mirey G, Ligensa T, Weidner KM, Chardin P, Camonis J (Feb 2000). "Interaction of the Grb7 adapter protein with Rnd1, a new member of the Rho family". FEBS Letters. 467 (1): 91–6. doi:10.1016/S0014-5793(99)01530-6. PMID10664463. S2CID4901644.