A specific binding site for neoxanthin in the monomeric antenna proteins CP26 and CP29 of Photosystem II.
[No authors listed]
摘要
The location of the neoxanthin binding site in CP26 and CP29 was investigated by site-directed mutagenesis. The crystallographic structure of LHCII shows that the binding of neoxanthin to the N1 site is stabilised by an H bond with a tyrosine in the lumenal loop. This residue is conserved in CP26 and CP29. Mutation of this tyrosine into phenylalanine induced specific loss of neoxanthin without affecting violaxanthin binding. In contrast to previous proposals, it is thus concluded that also in these minor antenna complexes neoxanthin is accommodated in the N1 site. The characteristics of this binding site in the different antenna complexes are discussed.
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基因功能
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原始数据
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文献解读
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