NDPKB真核表达载体的构建及其对细胞生长活性的影响

将目的基因NDPKB连接到pEGFP—N1真核表达载体，转染Vero细胞，通过增强型绿色荧光蛋白（EGFP）和Westernblotting分析，鉴定构建的pEGFP—NDPKB真核表达载体的正确性；利用生物信息学工具分析预测NDPKB蛋白的三维结构和可能存在的活性位点；MTT试验检测NDPKB对细胞生长活性的影响。结果显示，pEGFP-NDPKB真核表达载体构建成功，在Vero细胞中NDPKB和GFP蛋白能有效地融合表达。在线预测了NDPKB蛋白的三维结构和可能存在的活性位点。MTT试验结果表明，NDPKB对Vero细胞生长活性的抑制率为25．8％，对A549细胞生长活性的抑制率为22．7％。结果表明，NDPKB能够抑制细胞的生长，对细胞的凋亡具有正调节作用。

Construction of NDPK B eukaryotic expression vector and influence on cellular growth activity

Construct pEGFP-NDPK B eukaryotic expression vector,forecast NDPK B protein 3D structure and activi- ty sites,research the influence of NDPK B expression on cellular growth activity. Connected the NDPK B gene to pEGFP-N1 eukaryotic expression vector,transfected into Vero cells,through the enhanced green fluorescent protein （EGFP） and western blot identified the eukaryotic expression vector . Used the bioinformatics analysis tools to pre- dict NDPK B protein 3D structure and putative activity sites, MTT test detected the influence of NDPK B expression on cellular growth activity, pEGFP- NDPK B eukaryotic expression vector was constructed successfully, the NDPK B-GFP could express in Vero cells effectively, the 3D structure and activity sites of NDPK B had been predicted, the MTT results suggested the suppression ratio in Vero cells was 25.8% ,and 22.7% in A549 cells. NDPK B can inhib- it the cellular growth,and has a positive regulatory role in cellular apoptosis.