一条KRAB型锌指蛋白全长新基因的克隆与功能初探

从人胎脑cDNA文库中克隆到一条全长的锌指蛋白新基因的cDNA,命名为ZNF303。序列分析表明,ZNF303的C末端含有7个保守的锌指基序,N末端含有一个KRAB(Krüppel?associated box)结构域。利用肝癌组织表达谱基因芯片杂交证明,该基因在肝癌组织中的表达量有明显降低。认为这种降低可能跟肝癌的形成和转移有密切的关系。利用辐射杂交基因定位技术,得出该基因在人类染色体上的位置是19q13.2。 Abstract: We have cloned a full?length novel zinc finger cDNA of the Krüppel family from human fetal brain cDNA library. Sequence analysis indicates that ZNF303 contains 7 highly conserved zinc finger motifs at the C-terminus and a KRAB(Krüppel-associated box)domain at the N-terminus of the deduced rotein.Hybridization using gene chip of hepatic cancer tissue demonstrates the expressive amount in hepatic cancer tissue is lower than control. We hypothecate that the decreasing of expression amount is related to the formation and metastasis of hepatic cancer.Finally,we show that ZNF303 maps on human chromosome 19q13.2 by radiation hybrid.