Iron acquisition and allocation in stramenopile algae.
Iron acquisition and allocation in stramenopile algae.
复制标题
原生藻藻中铁的获取和分配。
DOI：
--
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发表时间：
2013
影响因子：
6.9
通讯作者：
J. Raven
中科院分区：
文献类型：
--
作者：
J. Raven
在光合生物生活的海洋表层，铁这一必需元素的生物利用率很低。在我们的理解铁收购机制在褐藻和硅藻（stratomile藻类）的最新进展表明，在吸收过程中的运输之前，或期间，铁还原为亚铁的重要性。铁在光合细菌中的作用类似于在其他产氧生物中的作用，（除了来自海洋缺铁部分的硅藻海链藻外）它们缺乏质体蓝蛋白，而是使用细胞色素c 6。这种相同的硅藻通过减少光系统I，细胞色素c 6，和细胞色素B 6 f复合物每个细胞和每个光系统II相对于沿海海链藻;类似的变化发生在表型响应铁缺乏在其他硅藻，如三角褐指藻。在一些生长在铁限制条件下的硅藻中，细胞中基本上所有的铁都可以由催化蛋白中的铁来解释。然而，铁可以储存铁。基因组研究表明，羽状，但不是中心，硅藻有铁储存蛋白铁蛋白。虽然穆斯堡尔和X射线分析（57）铁标记的Ectocarpus siliculosus显示铁在无定形矿物相类似的铁蛋白的核心，基因组显示没有蛋白质与铁蛋白显着序列相似性。
The essential element iron has a low biological availability in the surface ocean where photosynthetic organisms live. Recent advances in our understanding of iron acquisition mechanisms in brown algae and diatoms (stramenopile algae) show the importance of the reduction of ferric to ferrous iron prior to, or during, transport in the uptake process. The uses of iron in photosynthetic stramenopiles resembles that in other oxygenic organisms, although (with the exception of the diatom Thalassiosira oceanica from an iron-deficient part of the ocean) they lack plastocyanin, instead using cytochrome c 6, This same diatom further economizes genotypically on the use of iron in photosynthesis by decreasing the expression of photosystem I, cytochrome c 6, and the cytochrome b 6 f complex per cell and per photosystem II relative to the coastal Thalassiosira pseudonana; similar changes occur phenotypically in response to iron deficiency in other diatoms such as Phaeodactylum tricornutum. In some diatoms grown under iron-limiting conditions, essentially all of the iron in the cells can be accounted for by the iron occurring in catalytic proteins. However, stramenopiles can store iron. Genomic studies show that pennate, but not centric, diatoms have the iron storage protein ferritin. While Mössbauer and X-ray analysis of (57)Fe-labelled Ectocarpus siliculosus shows iron in an amorphous mineral phase resembling the core of ferritin, the genome shows no protein with significant sequence similarity to ferritin.
DOI：
10.1016/j.bbamcr.2012.04.010
发表时间：
2012-09
影响因子：
5.1
作者：
Blaby-Haas, Crysten E.;Merchant, Sabeeha S.
通讯作者：
Merchant, Sabeeha S.
影响因子：
12.3
作者：
Lommer M;Specht M;Roy AS;Kraemer L;Andreson R;Gutowska MA;Wolf J;Bergner SV;Schilhabel MB;Klostermeier UC;Beiko RG;Rosenstiel P;Hippler M;LaRoche J
通讯作者：
LaRoche J