枳PPF-1同源基因的克隆及分析

以枳[Poncirus trifoliata(L.)Raf.]实生苗为材料,采用RT-PCR及RACE技术,获得了PPF-1(开花、衰老相关基因)同源基因的cDNA全长序列PtPPF-1,该cDNA全长1 493 bp,编码452个氨基酸,与豌豆PPF-1、拟南芥ALB3、水稻PPF-1及葡萄一未命名基因的氨基酸序列同源性较高,说明PPF-1基因在进化过程中可能变异较小。半定量RT-PCR分析表明PtPPF-1在叶片中表达量最高,顶芽和茎中相似,在根中未检测到,表明该基因功能与叶绿体有关。     

中华鳖不同组织Sox基因表达的RTPCR分析

本文采用ＲＴ－ＰＣＲ技术,研究了中华鳖不同组织Ｓｏｘ基因的表达,并通过ＰＣＲ直接克隆法,分析了来自睾丸、脑和脾组织中的Ｓｏｘ基因序列。结果表明：在中华鳖的成本组织中,Ｓｏｘ基因在脑、心肌、肾、脾和雄性的睾丸组织中均有不同程度的表达,而在肌肉、肝脏和雌性的卵巢中则无表达,显示该基因具有组织表达特异性。克隆分析显示,在睾丸组织中表达的是ＴＳＳｏｘ１和ＴＳＳｏｘ４基因,而在脑组织中表达的是ＴＳＳｏｘ２和     

Cloning and characterization of the promoter regions from the parent and paralogous creatine transporter genes

Interconversion between phosphocreatine and creatine, catalyzed by creatine kinase is crucial in the supply of ATP to tissues with high energy demand. Creatine's importance has been established by its use as an ergogenic aid in sport, as well as the development of intellectual disability in patients with congenital creatine deficiency. Creatine biosynthesis is complemented by dietary creatine uptake. Intracellular transport of creatine is carried out by a creatine transporter protein (CT1/CRT/CRTR) encoded by the SLC6A8 gene. Most tissues express this gene, with highest levels detected in skeletal muscle and kidney. There are lower levels of the gene detected in colon, brain, heart, testis and prostate. The mechanism(s) by which this regulation occurs is still poorly understood. A duplicated unprocessed pseudogene of SLC6A8–SLC6A10P has been mapped to chromosome 16p11.2 (contains the entire SLC6A8 gene, plus 2293 bp of 5′flanking sequence and its entire 3′UTR). Expression of SLC6A10P has so far only been shown in human testis and brain. It is still unclear as to what is the function of SLC6A10P. In a patient with autism, a chromosomal breakpoint that intersects the 5′flanking region of SLC6A10P was identified; suggesting that SLC6A10P is a non-coding RNA involved in autism. Our aim was to investigate the presence of cis-acting factor(s) that regulate expression of the creatine transporter, as well as to determine if these factors are functionally conserved upstream of the creatine transporter pseudogene.