ALK基因编码一种受体酪氨酸激酶(eceptor tyrosine kinase ,RTK),为跨膜蛋白,属于胰岛素受体超家族,在大脑发育与及特定的神经元中起重要作用。最初在间变性大细胞淋巴瘤(anaplastic large cell lymphoma, ALCL)发现ALK-NPM1融合蛋白,目前已在其它肿瘤中包括神经母细胞瘤和非小细胞肺癌,发现该基因出现突变、扩增或者重排,其中染色体重排最为常见,导致ALK与其他基因产生融合,包括ALK(2号染色体)/EML4(2号染色体),ALK / RANBP2(2号染色体),ALK /ATIC(2号染色体),ALK / TFG(3号染色体),ALK / NPM1(5号染色体),ALK / SQSTM1(5号染色体),ALK / KIF5B(10号染色体),ALK / CLTC(17号染色体),ALK / TPM4(19号染色体),和ALK / MSN(X染色体)。
V1180L错义突变在突变筛选中被鉴定,以发现在非小细胞肺癌细胞系中对阿来替尼产生耐药性的突变。该突变对环唑替尼和阿来替尼有耐药性,但对TAE684、西替尼敏感,对布赖卡汀尼敏感度较低。与I1171T相似,它存在于ALK的ATP袋中,可能干扰阿来替尼和环唑替尼的结合,作为一种抵抗机制。
The V1180L missense mutation was identified in a mutagenesis screen to find mutations that conferred resistance to alectinib in a non-small cell lung cancer cell line. This mutation shows resistance to crizotinib and alectinib but sensitivity to TAE684, ceritinib and more mild sensitivity to brigatinib. Similar to I1171T, it resides in the ATP pocket of ALK and likely interferes with alectinib and crizotinib binding as a mechanism of resistance.
| Chr. | Start | Stop | Ref. s | Var. Bases |
| 2 | 29443679 | 29443679 | C | G |
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| ENST00000389048.3 | ||||