Structure and organization of phycobilisomes on membranes of the red alga Porphyridium cruentum.
Structure and organization of phycobilisomes on membranes of the red alga Porphyridium cruentum.
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DOI：
10.1007/s11120-007-9264-z
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发表时间：
2008-02
影响因子：
3.7
通讯作者：
Boekema, Egbert J.
中科院分区：
文献类型：
--
作者：
Arteni, Ana A.;Liu, Lu-Ning;Aartsma, Thijs J.;Zhang, Yu-Zhong;Zhou, Bai-Cheng;Boekema, Egbert J.
本工作采用电子显微镜和单粒子平均法研究了单细胞红紫球藻半椭圆形藻胆体的超分子结构。随机排列的藻胆体在强光条件下的尺寸为60 × 41 × 34 nm（长×宽×高）。半椭圆形藻胆体具有相对灵活的构象。在低光条件下观察到的紧密堆积的半晶体阵列中，宽度减小到31或35 nm，约为蓝细菌集胞藻属PCC 6803的藻胆体宽度的两倍。由于后者的大小相匹配的二聚体PSII的宽度，我们建议，一个PBS线与一个PSII二聚体在蓝藻。在红藻中，在弱光条件下类似的1：1的比例可能表明红藻藻胆体被膜结合的外周天线放大，这在蓝藻中是不存在的。本文的在线版本（doi：10.1007/s11120-007-9264-z）包含补充材料，可供授权用户使用。
In the present work, electron microscopy and single particle averaging was performed to investigate the supramolecular architecture of hemiellipsoidal phycobilisomes from the unicellular red alga Porphyridium cruentum. The dimensions were measured as 60 × 41 × 34 nm (length × width × height) for randomly ordered phycobilisomes, seen under high-light conditions. The hemiellipsoidal phycobilisomes were found to have a relatively flexible conformation. In closely packed semi-crystalline arrays, observed under low-light conditions, the width is reduced to 31 or 35 nm, about twice the width of the phycobilisome of the cyanobacterium Synechocystis sp. PCC 6803. Since the latter size matches the width of dimeric PSII, we suggest that one PBS lines up with one PSII dimer in cyanobacteria. In red algae, a similar 1:1 ratio under low-light conditions may indicate that the red algal phycobilisome is enlarged by a membrane-bound peripheral antenna which is absent in cyanobacteria. The online version of this article (doi:10.1007/s11120-007-9264-z) contains supplementary material, which is available to authorized users.
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影响因子：
7.4
作者：
Joshua, S;Bailey, S;Mullineaux, CW
通讯作者：
Mullineaux, CW
影响因子：
4.3
作者：
JAHN, W;STEINBISS, J;ZETSCHE, K
通讯作者：
ZETSCHE, K
影响因子：
3.9
作者：
NILSSON, F;SIMPSON, DJ;ANDERSSON, B
通讯作者：
ANDERSSON, B
影响因子：
4.3
作者：
Gardian, Zdenko;Bumba, Ladislav;Vacha, Frantisek
通讯作者：
Vacha, Frantisek
DOI：
10.1046/j.1432-1327.1999.00877.x
发表时间：
1999-12-01
期刊：
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子：
--
作者：
Kuhl, H;Rögner, M;Boekema, EJ
通讯作者：
Boekema, EJ