A NUCLEAR-ENCODED FORM-II RUBISCO IN DINOFLAGELLATES
A NUCLEAR-ENCODED FORM-II RUBISCO IN DINOFLAGELLATES
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DOI：
10.1126/science.7777861
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发表时间：
1995-06-16
期刊：
影响因子：
56.9
通讯作者：
HASTINGS, JW
中科院分区：
文献类型：
--
作者：
MORSE, D;SALOIS, P;HASTINGS, JW
大多数甲藻的叶绿体是不寻常的，因为它们被三层膜包围，含有类胡萝卜素周围素。甲藻叶绿体中的核酮糖-1，5-二磷酸羧基加氧酶(Rubisco)在这里也被发现是不寻常的。与其他真核生物不同，含有附着素的甲藻使用一种以前只在某些种类的变形杆菌中发现的Rubisco形式(形式II)。此外，这种Rubisco不像其他生物那样编码在叶绿体DNA中，而是由核DNA编码。这种酶的不同寻常的性质及其基因的位置支持了这样的观点，即甲藻类叶绿体可能具有独特的进化起源。
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.