| RRC ID |
69307
|
| 著者 |
Streckaite S, Llansola-Portoles MJ, Pascal AA, Ilioaia C, Gall A, Seki S, Fujii R, Robert B.
|
| タイトル |
Pigment structure in the light-harvesting protein of the siphonous green alga Codium fragile.
|
| ジャーナル |
Biochim Biophys Acta Bioenerg
|
| Abstract |
The siphonaxanthin-siphonein-chlorophyll-a/b-binding protein (SCP), a trimeric light-harvesting complex isolated from photosystem II of the siphonous green alga Codium fragile, binds the carotenoid siphonaxanthin (Sx) and/or its ester siphonein in place of lutein, in addition to chlorophylls a/b and neoxanthin. SCP exhibits a higher content of chlorophyll b (Chl-b) than its counterpart in green plants, light-harvesting complex II (LHCII), increasing the relative absorption of blue-green light for photosynthesis. Using low temperature absorption and resonance Raman spectroscopies, we reveal the presence of two non-equivalent Sx molecules in SCP, and assign their absorption peaks at 501 and 535 nm. The red-absorbing Sx population exhibits a significant distortion that is reminiscent of lutein 2 in trimeric LHCII. Unexpected enhancement of the Raman modes of Chls-b in SCP allows an unequivocal description of seven to nine non-equivalent Chls-b, and six distinct Chl-a populations in this protein.
|
| 巻・号 |
1862(5)
|
| ページ |
148384
|
| 公開日 |
2021-5-1
|
| DOI |
10.1016/j.bbabio.2021.148384
|
| PII |
S0005-2728(21)00017-7
|
| PMID |
33545114
|
| MeSH |
Chlorophyll / metabolism*
Chlorophyll A / metabolism*
Chlorophyta / metabolism*
Light-Harvesting Protein Complexes / metabolism*
Photosynthesis
Photosystem II Protein Complex / metabolism*
Pigments, Biological / chemistry*
Pigments, Biological / metabolism
Xanthophylls / metabolism*
|
| IF |
4.441
|
| リソース情報 |
| 藻類 |
Codium fragile |
