Department of Genetics, The Royal Veterinary and Agricultural University, Bülowsvej 13, 1870, Copenhagen V, Denmark.
Plant Mol Biol. 1986 Jan;7(1):3-10. doi: 10.1007/BF00020126.
The genes encoding the two P700 chlorophyll a-apoproteins of the photosystem I complex were localized on the pea (Pisum sativum) chloroplast genome. The nucleotide sequence of the genes and the flanking regions has been determined. The genes are separated by 25 bp and are probably cotranscribed. The 5' terminal gene (psaA1) codes for a 761-residue protein (MW 84.1 kD) and the 3' terminal gene (psaA2) for a 734-residue protein (MW 82.4 kD). Both proteins are highly hydrophobic and contain eleven putative membrane-spanning domains. The homology to the corresponding polypeptides from maize are 89% and 95% for psaA1 and psaA2, respectively. A putative promoter has been identified for the psaA1 gene, and potential ribosome binding sites are present before both genes.
编码光合系统 I 复合物中两个 P700 叶绿素 a 脱辅基蛋白的基因被定位在豌豆（Pisum sativum）叶绿体基因组上。基因和侧翼区域的核苷酸序列已经确定。这两个基因被 25 个碱基隔开，可能是共转录的。5'末端基因（psaA1）编码一个 761 个残基的蛋白质（MW 84.1 kD），3'末端基因（psaA2）编码一个 734 个残基的蛋白质（MW 82.4 kD）。这两种蛋白质都具有高度疏水性，并且含有十一个潜在的跨膜结构域。psaA1 和 psaA2 与玉米相应多肽的同源性分别为 89%和 95%。已经鉴定出 psaA1 基因的启动子，并且在这两个基因之前都存在潜在的核糖体结合位点。
