RAS p21 proteinski aktivator 1
RAS p21 proteinski aktivator (Protein aktivacije GTPaze) 1 | |||||||||||
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Доступне структуре | |||||||||||
1WER, 1WQ1, 2GQI, 2GSB, 2J05, 2J06, 2M51, 4FSS | |||||||||||
Идентификатори | |||||||||||
Симболи | RASA1; CM-AVM; CMAVM; GAP; PKWS; RASA; RASGAP; p120GAP; p120RASGAP | ||||||||||
Вањски ИД | OMIM: 139150 MGI: 97860 HomoloGene: 2168 GeneCards: RASA1 Gene | ||||||||||
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Преглед РНК изражавања | |||||||||||
подаци | |||||||||||
Ортолози | |||||||||||
Врста | Човек | Миш | |||||||||
Ентрез | 5921 | 218397 | |||||||||
Eнсембл | ENSG00000145715 | ENSMUSG00000021549 | |||||||||
UниПрот | P20936 | E9PYG6 | |||||||||
Реф. Секв. (иРНК) | NM_002890 | NM_145452 | |||||||||
Реф. Секв. (протеин) | NP_002881 | NP_663427 | |||||||||
Локација (УЦСЦ) |
Chr 5: 86.56 - 86.69 Mb |
Chr 13: 85.21 - 85.29 Mb | |||||||||
ПубМед претрага | [1] | [2] |
RAS p21 proteinski aktivator 1 ili RasGAP (aktivirajući protein Ras GTPaze), takođe poznat kao RASA1, je 120-kDa citosolni ljudski protein koji ima dve glavne aktivnosti:
- Inakctivacija Ras proteina iz njegove aktivne GTP-vezane forme do njegove neaktivne GDP-vezane forme pojačavanjem endogene GTPazne Ras aktivnosti, preko njegovog C-terminalnog GAP domena
- Mitogena transmisija signala u smeru daljih interakcionih partnera putemn njegovih N-terminalnih SH2-SH3-SH2 domena
Protein kodiran ovim genom je lociran u citoplazmi i deo je GAP1 familije GTPazno-aktiviranih proteina. Ovaj genski produkt stimuliše GTPaznu aktivnost normalnog RAS p21, ali ne i njegovog onkogenog pandana. Delujući kao supresor RAS funkcije, ovaj protein pojačava slabu unutrašnju GTPaznu aktivnost RAS proteina, što dovodi do inaktiviranje GDP-vezane forme RAS-a, čime pospešuje kontrolu ćelijske proliferacije i diferencijacije. Mutacije koje dovode do promena u mestima vezivanja ovog proteina su vezane za bazalne ćelijske kacinome. Alternativnim splajsovanjem se formiraju dve izoforme, pri čemu kraća izoforma, kojoj nedostaje N-terminusni hidrofobni region zadržava aktivnost. Ona je izobilno izražena u materičnim, ali ne i odraslim tkivima.[1]
Domeni
[уреди | уреди извор]RasGAP sadrži jedan SH3 domen i dva SH2 domena, PH domen, i GAP domen.
Interakcije
[уреди | уреди извор]RAS p21 proteinski aktivator 1 formira interakcije sa:
iRNK može da formira interakcije sa Mir-132 mikroRNK. Ovaj protein učestvuje u angiogenezi.[28]
Baza podataka bolesti
[уреди | уреди извор]Reference
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- ^ Molloy DP, Owen D, Grand RJ (jul 1995). „Ras binding to a C-terminal region of GAP”. FEBS Lett. 368 (2): 297—303. PMID 7628625. doi:10.1016/0014-5793(95)00657-u.
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- ^ Sánchez-Margalet V, Najib S (oktobar 2001). „Sam68 is a docking protein linking GAP and PI3K in insulin receptor signaling”. Mol. Cell. Endocrinol. 183 (1-2): 113—21. PMID 11604231. doi:10.1016/s0303-7207(01)00587-1.
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- ^ Farooqui T, Kelley T, Coggeshall KM, Rampersaud AA, Yates AJ (1999). „GM1 inhibits early signaling events mediated by PDGF receptor in cultured human glioma cells”. Anticancer Res. 19 (6B): 5007—13. PMID 10697503.
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- ^ Zrihan-Licht S, Fu Y, Settleman J, Schinkmann K, Shaw L, Keydar I, Avraham S, Avraham H (mart 2000). „RAFTK/Pyk2 tyrosine kinase mediates the association of p190 RhoGAP with RasGAP and is involved in breast cancer cell invasion”. Oncogene. 19 (10): 1318—28. PMID 10713673. doi:10.1038/sj.onc.1203422.
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Literatura
[уреди | уреди извор]- Tocque B; Delumeau I; Parker F; et al. (1997). „Ras-GTPase activating protein (GAP): a putative effector for Ras”. Cell. Signal. 9 (2): 153—8. PMID 9113414. doi:10.1016/S0898-6568(96)00135-0.
- Boon LM, Mulliken JB, Vikkula M (2005). „RASA1: variable phenotype with capillary and arteriovenous malformations”. Curr. Opin. Genet. Dev. 15 (3): 265—9. PMID 15917201. doi:10.1016/j.gde.2005.03.004.