Morse D, Salois P, Markovic P, Hastings J W
Institut de Recherche en Biologie Végétal, Université de Montréal, PQ, Canada.
Science. 1995 Jun 16;268(5217):1622-4. doi: 10.1126/science.7777861.
The chloroplasts of most dinoflagellates are unusual in that they are surrounded by three membranes and contain the carotenoid peridinin. The ribulose-1,5-bisphosphate carboxylase-oxygenase (RuBisCO) in dinoflagellate chloroplasts was found here to also be unusual. Unlike other eukaryotes, dinoflagellates containing peridinin use a form of RuBisCO (form II) previously found only in some species of proteobacteria. Furthermore, this RuBisCO is not encoded in the chloroplast DNA, as is the case in other organisms, but is encoded by the nuclear DNA. The unusual nature of this enzyme and location of its gene support the idea that dinoflagellate chloroplasts may have had a distinctive evolutionary origin.
大多数甲藻的叶绿体不同寻常，因为它们被三层膜包围，并且含有类胡萝卜素多甲藻素。在此发现，甲藻叶绿体中的1,5-二磷酸核酮糖羧化酶加氧酶（RuBisCO）也不同寻常。与其他真核生物不同，含有多甲藻素的甲藻使用一种之前仅在某些变形杆菌物种中发现的RuBisCO形式（II型）。此外，这种RuBisCO不像其他生物那样由叶绿体DNA编码，而是由核DNA编码。这种酶的不同寻常性质及其基因位置支持了甲藻叶绿体可能有独特进化起源的观点。
