Bryant D A, Schluchter W M, Stirewalt V L
Department of Molecular and Cell Biology, Pennsylvania State University, University Park 16802.
Gene. 1991 Feb 15;98(2):169-75. doi: 10.1016/0378-1119(91)90170-g.
The petF and rsp10 genes of the cyanellar genome of the taxonomically ambiguous flagellate Cyanophora paradoxa have been cloned, mapped, and sequenced. In higher plants these genes are not encoded in the chloroplast DNA, but are encoded in the nucleus. The C. paradoxa petF gene predicts a protein of 99 amino acids (aa) which is more similar to type-I ferredoxins of diverse cyanobacteria than to those of green algae, dinoflagellates, and higher plants. The rsp10 gene (rspJ) predicts a protein of 105 aa which is about 50% identical and 71% homologous to the proteins of Escherichia coli and Mycoplasma capricolum. The results are discussed within the context of the endosymbiotic origins of chloroplasts from cyanobacteria.
分类地位尚不明确的鞭毛虫蓝氏拟色球藻（Cyanophora paradoxa）蓝小体基因组中的petF和rsp10基因已被克隆、定位并测序。在高等植物中，这些基因并非由叶绿体DNA编码，而是由细胞核编码。蓝氏拟色球藻的petF基因预测编码一种含99个氨基酸的蛋白质，该蛋白质与多种蓝细菌的I型铁氧化还原蛋白更为相似，而与绿藻、甲藻和高等植物的I型铁氧化还原蛋白差异较大。rsp10基因（rspJ）预测编码一种含105个氨基酸的蛋白质，该蛋白质与大肠杆菌和山羊支原体的蛋白质约50%相同，71%同源。本文在叶绿体起源于蓝细菌的内共生学说背景下对研究结果进行了讨论。
