Antenna ring around trimeric Photosystem I in chlorophyll b containing cyanobacterium Prochlorothrix hollandica
Jazyk angličtina Země Nizozemsko Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
15949978
DOI
10.1016/j.bbabio.2005.02.005
PII: S0005-2728(05)00081-2
Knihovny.cz E-zdroje
- MeSH
- centrifugace - gradient hustoty MeSH
- elektronová mikroskopie MeSH
- fotosystém I (proteinový komplex) ultrastruktura MeSH
- kvarterní struktura proteinů MeSH
- Prochlorothrix ultrastruktura MeSH
- světlosběrné proteinové komplexy chemie ultrastruktura MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- fotosystém I (proteinový komplex) MeSH
- světlosběrné proteinové komplexy MeSH
Prochlorothrix hollandica is one of the three known species of an unusual clade of cyanobacteria (formerly called "prochlorophytes") that contain chlorophyll a and b molecules bound to intrinsic light-harvesting antenna proteins. Here, we report the structural characterization of supramolecular complex consisting of Photosystem I (PSI) associated with the chlorophyll a/b-binding Pcb proteins. Electron microscopy and single particle image analysis of negatively stained preparations revealed that the Pcb-PSI supercomplex consists of a central trimeric PSI surrounded by a ring of 18 Pcb subunits. We conclude that the formation of the Pcb ring around trimeric PSI represents a mechanism for increasing the light-harvesting efficiency in chlorophyll b-containing cyanobacteria.
Citace poskytuje Crossref.org
Structure of PSI, PSII and antennae complexes from yellow-green alga Xanthonema debile
