Ultraviolet-B photodestruction of a light-harvesting complex.
نویسندگان
چکیده
منابع مشابه
Light-Harvesting Complex: Rings of light
The atomic structure of the bacterial light-harvesting complex helps to explain how the energy of sunlight is efficiently absorbed and transferred between bacteriochlorophyll molecules towards the reaction centre.
متن کاملThermal stability of trimeric light-harvesting chlorophyll a/b complex (LHCIIb) in liposomes of thylakoid lipids.
The major light-harvesting chlorophyll a/b complex (LHCIIb) of photosystem (PS) II functions by harvesting light energy and by limiting and balancing the energy flow directed towards the PSI and PSII reaction centers. The complex is predominantly trimeric; however, the monomeric form may play a role in one or several of the regulatory functions of LHCIIb. In this work the dissociation temperatu...
متن کاملThe structure of membrane crystals of the light-harvesting chlorophyll a/b protein complex
Membrane crystals of the light-harvesting chlorophyll a/b protein complex from pea chloroplasts were investigated using electron microscopy and image analysis. The membrane crystals formed upon precipitation of the detergent-solubilized complex with mono- and divalent cations in the presence of small amounts of Triton X-100. The crystalline fraction contained two polypeptides of 25,000 and 27,0...
متن کاملAssembly of the major light-harvesting chlorophyll-a/b complex: Thermodynamics and kinetics of neoxanthin binding.
The major light-harvesting chlorophyll-a/b complex in most higher plants contains three carotenoids, lutein, neoxanthin, and violaxanthin. How these pigments are assembled into the complex during its biogenesis is largely unknown. Here we show that neoxanthin but not lutein can dissociate from the fully assembled complex. Its equilibrium binding constant in a detergent system (0.1% n-dodecyl-be...
متن کاملBiosynthetic pathways of two polypeptide subunits of the light- harvesting chlorophyll a/b protein complex
We have used an in vitro reconstitution system, consisting of cell-free translation products and intact chloroplasts, to investigate the pathway from synthesis to assembly of two polypeptide subunits of the light-harvesting chlorophyll-protein complex. These polypeptides, designated 15 and 16, are integral components of the thylakoid membranes, but they are products of cytoplasmic protein synth...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1996
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.93.11.5258