Molecular basis of chromatic adaptation in pennate diatom Phaeodactylum tricornutum
Language English Country Netherlands Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25748970
DOI
10.1016/j.bbabio.2015.02.016
PII: S0005-2728(15)00047-X
Knihovny.cz E-resources
- Keywords
- Chromatic adaptation, Diatom, Heterokonta, Light harvesting antenna, Phaeodactylum tricornutum, Red-shifted antenna complex,
- MeSH
- Color * MeSH
- Chlorophyll A MeSH
- Chlorophyll metabolism MeSH
- Fluorescence * MeSH
- Spectrometry, Fluorescence MeSH
- Photosystem II Protein Complex metabolism MeSH
- Phylogeny MeSH
- Adaptation, Physiological * MeSH
- Spectrometry, Mass, Electrospray Ionization MeSH
- Diatoms physiology MeSH
- Light MeSH
- Light-Harvesting Protein Complexes metabolism MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Chlorophyll A MeSH
- Chlorophyll MeSH
- Photosystem II Protein Complex MeSH
- Light-Harvesting Protein Complexes MeSH
The remarkable adaptability of diatoms living in a highly variable environment assures their prominence among marine primary producers. The present study integrates biochemical, biophysical and genomic data to bring new insights into the molecular mechanism of chromatic adaptation of pennate diatoms in model species Phaeodactylum tricornutum, a marine eukaryote alga possessing the capability to shift its absorption up to ~700 nm as a consequence of incident light enhanced in the red component. Presence of these low energy spectral forms of Chl a is manifested by room temperature fluorescence emission maximum at 710 nm (F710). Here we report a successful isolation of the supramolecular protein complex emitting F710 and identify a member of the Fucoxanthin Chlorophyll a/c binding Protein family, Lhcf15, as its key building block. This red-shifted antenna complex of P. tricornutum appears to be functionally connected to photosystem II. Phylogenetic analyses do not support relation of Lhcf15 of P. tricornutum to other known red-shifted antenna proteins thus indicating a case of convergent evolutionary adaptation towards survival in shaded environments.
References provided by Crossref.org
Eustigmatophyte model of red-shifted chlorophyll a absorption in light-harvesting complexes
Pigment configuration in the light-harvesting protein of the xanthophyte alga Xanthonema debile
A two-component nonphotochemical fluorescence quenching in eustigmatophyte algae
Architecture of the light-harvesting apparatus of the eustigmatophyte alga Nannochloropsis oceanica
