O G-CSF-R é un receptor transmembrana que consta dunha porción de unión ao ligando extracelular, un dominio transmembrana, e a porción citoplasmática que é responsable da transdución de sinais. A unión do ligando do G-CSF-R está asociada coa dimerización do receptor e transdución de sinais por medio de proteínas como a Jak, Lyn, STAT, e Erk1/2.
Isoformas
Coñécense 4 isoformas.[4] A isoforma de clase IV funciona defectuosamente para a internalización de ligandos e a sinalización da diferenciación.
As mutacións na parte intracelular deste receptor están tamén asociadas con certos tipos de leucemia.[6]
En medicina clínica, suxeriuse que se debería evitar o uso do G-CSF, polo menos en nenos e adolescentes e quizais tamén en adultos cando está sobreexpresada a isoforma IV do G-CSF-R.[7]
Interaccións
O receptor do factor estimulante das colonias de granulocitos interacciona con Grb2,[8]HCK[9] e SHC1.[8]
Notas
↑Tweardy DJ, Anderson K, Cannizzaro LA, Steinman RA, Croce CM, Huebner K (1992). "Molecular cloning of cDNAs for the human granulocyte colony-stimulating factor receptor from HL-60 and mapping of the gene to chromosome region 1p32-34". Blood79 (5): 1148–54. PMID1371413.
↑Ehlers S, Herbst C, Zimmermann M; et al. (2010). "Granulocyte colony-stimulating factor (G-CSF) treatment of childhood acute myeloid leukemias that overexpress the differentiation-defective G-CSF receptor isoform IV is associated with a higher incidence of relapse". J. Clin. Oncol.28 (15): 2591–7. PMID20406937. doi:10.1200/JCO.2009.25.9010.
↑ 8,08,1Ward AC, Monkhouse JL, Hamilton JA, Csar XF (1998). "Direct binding of Shc, Grb2, SHP-2 and p40 to the murine granulocyte colony-stimulating factor receptor". Biochim. Biophys. Acta1448 (1): 70–6. PMID9824671. doi:10.1016/S0167-4889(98)00120-7.
↑Ward AC, Monkhouse JL, Csar XF, Touw IP, Bello PA (1998). "The Src-like tyrosine kinase Hck is activated by granulocyte colony-stimulating factor (G-CSF) and docks to the activated G-CSF receptor". Biochem. Biophys. Res. Commun.251 (1): 117–23. PMID9790917. doi:10.1006/bbrc.1998.9441.
Kimura A, Sultana TA (2005). "Granulocyte colony-stimulating factor receptors on CD34++ cells in patients with myelodysplastic syndrome (MDS) and MDS-acute myeloid leukemia.". Leuk. Lymphoma45 (10): 1995–2000. PMID15370243. doi:10.1080/10428190410001714034.
Tweardy DJ, Anderson K, Cannizzaro LA; et al. (1992). "Molecular cloning of cDNAs for the human granulocyte colony-stimulating factor receptor from HL-60 and mapping of the gene to chromosome region 1p32-34.". Blood79 (5): 1148–54. PMID1371413.
Seto Y, Fukunaga R, Nagata S (1992). "Chromosomal gene organization of the human granulocyte colony-stimulating factor receptor.". J. Immunol.148 (1): 259–66. PMID1530796.
Inazawa J, Fukunaga R, Seto Y; et al. (1991). "Assignment of the human granulocyte colony-stimulating factor receptor gene (CSF3R) to chromosome 1 at region p35-p34.3.". Genomics10 (4): 1075–8. PMID1833306. doi:10.1016/0888-7543(91)90202-P.
Dong F, Brynes RK, Tidow N; et al. (1995). "Mutations in the gene for the granulocyte colony-stimulating-factor receptor in patients with acute myeloid leukemia preceded by severe congenital neutropenia.". N. Engl. J. Med.333 (8): 487–93. PMID7542747. doi:10.1056/NEJM199508243330804.
Zhao Y, Wagner F, Frank SJ, Kraft AS (1995). "The amino-terminal portion of the JAK2 protein kinase is necessary for binding and phosphorylation of the granulocyte-macrophage colony-stimulating factor receptor beta c chain.". J. Biol. Chem.270 (23): 13814–8. PMID7775438. doi:10.1074/jbc.270.23.13814.
Haniu M, Horan T, Arakawa T; et al. (1996). "Extracellular domain of granulocyte-colony stimulating factor receptor. Interaction with its ligand and identification of a domain in close proximity of ligand-binding region.". Arch. Biochem. Biophys.324 (2): 344–56. PMID8554326. doi:10.1006/abbi.1995.0047.
Horan T, Wen J, Narhi L; et al. (1996). "Dimerization of the extracellular domain of granuloycte-colony stimulating factor receptor by ligand binding: a monovalent ligand induces 2:2 complexes.". Biochemistry35 (15): 4886–96. PMID8664280. doi:10.1021/bi9525841.
McCracken S, Layton JE, Shorter SC; et al. (1996). "Expression of granulocyte-colony stimulating factor and its receptor is regulated during the development of the human placenta.". J. Endocrinol.149 (2): 249–58. PMID8708536. doi:10.1677/joe.0.1490249.
Haniu M, Horan T, Arakawa T; et al. (1996). "Disulfide structure and N-glycosylation sites of an extracellular domain of granulocyte-colony stimulating factor receptor.". Biochemistry35 (40): 13040–6. PMID8855939. doi:10.1021/bi960213u.
Bonaldo MF, Lennon G, Soares MB (1997). "Normalization and subtraction: two approaches to facilitate gene discovery.". Genome Res.6 (9): 791–806. PMID8889548. doi:10.1101/gr.6.9.791.