Search Results for "Plastosemiquinone Structure"
Original Source: An ONIOM Study of the Spin Density Distribution of the Q(A) Site Plastosemiquinone in the Photosystem II Reaction Center.
ONIOM (QM/MM) calculations are used to calculate the spin density distribution for the plastosemiquinone anion radical in the Q(A) binding site of photosystem II. A number of models are examined that explore the effect of iron depletion on the Q(A) site semiquinone spin density distribution and resultant hyperfine couplings. For a model system with a divalent metal ion in the nonheme site the calculated spin density in the Q(A) site model suggests that differential hydrogen-bonding strength to the O1 and O4...
Matching Channels
Tumor antigen is an antigenic substance produced in tumor cells, i.e., it triggers an immune response in the host. Tumor antigens are useful in identifying tumor cells and are potential candidates f...
Bioscience - news, views, reports and blogs
Bioscience - any of the sciences that deal with living organisms. The study of the nature, behavior, and uses of living organisms as applied to biology. Any of the branches of natural scienc...
PKC (protein kinase C) http://www.bioportfolio.com/channels/serine-threonine-protein-kinase-c-pkc is a kinase enzyme and a protein molecule that can change the format of other proteins through chemi...
Anti-viral peptides are used to treat infections such as HIV and AIDS, influenza incl. H5N1 strains, hepatitis C virus infections (HCV). Anti-bacterial peptides are used to treat infectiou...
Matching News
Structure of the agonist-bound neurotensin receptor
The X-ray crystal structure of a rat neurotensin receptor in complex with the C-terminal portion of neurotensin is presented; this is the first structure of a member of the β group of class A G-prote...
Researchers determine structure of ‘batteries’ of the biological clock
Howard Hughes Medical Institute scientists have determined the three-dimensional structure of two proteins that help keep the body's clocks in sync. The proteins, CLOCK and BMAL1, bind to each other t...
Intrinsically disordered proteins: A conversation with Rohit Pappu
If you open any biology textbook to the section on proteins, you will learn that a protein is made up of a sequence of amino acids, that the sequence determines how the chain of amino acids folds into...
Atomic-scale determination of surface facets in gold nanorods
The atomic structure of nanoparticles considerably influences their properties. A new methodology that is now able to measure the full three-dimensional atomic structure of free-standing nanoparticles...
Internal bone structure reveals loading and walking behavior
The form and structure of bones change as a result of the forces to which they are subjected. Researchers have used this fact to determine the load using the bone structure. This knowledge can be impo...
New type of solar structure cools buildings in full sunlight
Homes and buildings chilled without air conditioners. Car interiors that don't heat up in the summer sun. Tapping the frigid expanses of outer space to cool the planet. Science fiction, you say? Well,...
Crystal structure of ISG54 reveals a novel RNA binding structure and potential functional mechanisms
Updated structure of Drosophila cryptochrome
Arising from B. D. Zoltowski et al.Nature480, 396–399 (2011)Recently, we determined the X-ray crystal structure of full-length cryptochrome from Drosophila. Here we report an improved model of the D...
Matching PubMed Articles
ONIOM (QM/MM) calculations are used to calculate the spin density distribution for the plastosemiquinone anion radical in the Q(A) binding site of photosystem II. A number of models are examined that...
Quinones are utilized as charge-transfer cofactors in a wide variety of reactions that are crucial for photosynthesis and respiration. In photosynthetic protein complexes, both Type I and Type II, inc...
The structure of liquid SnTe under pressure.
We investigated the structure of liquid SnTe at high pressures up to 8.2 GPa by energy-dispersive x-ray diffraction. On melting at low pressures, the crystalline B1 structure changed into not B1-like...
Structure revision of asperjinone using computer-assisted structure elucidation methods.
The elucidated structure of asperjinone (1), a natural product isolated from thermophilic Aspergillus terreus, was revised using the expert system Structure Elucidator. The reliability of the revised...
Solution Structure of LCI, a Novel Antimicrobial Peptide from Bacillus subtilis.
LCI, a 47-residue cationic antimicrobial peptide (AMP) found in Bacillus subtilis, is one of the main effective components that have strong antimicrobial activity against Xanthomonas campestris pv Ory...
