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For the last five years, Waring “Buck” Trible has been having the same dream. He’s in the lab using CRISPR to tweak the genes of a wild worker ant. And poof! Like a Formicidae fairy tale, the lowly la...
Fine-tuning dosage of mutant genes unleashes long-trapped yield potential in tomato plants（图）
Fine-tuning dosage mutant genes unleashes long-trapped tomato plants
2017/7/20
Breeding in plants and animals typically involves straightforward addition. As beneficial new traits are discovered—like resistance to drought or larger fruits—they are added to existing prized variet...
As we push the limits of agriculture to feed more people in a warmer world, we do not understand how plants sense temperature.In a surprising turn of events, scientists at the University of Buenos Air...
19F NMR of Trifluoroacetyl-Labeled Cysteine Mutants of Myoglobin:Structural Probes of Nitric Oxide Bound to the H93G Cavity Mutant
19F NMR Trifluoroacetyl Cysteine Mutants Myoglobin Nitric Oxide H93G Cavity Mutant
2016/5/23
Nitric oxide (NO) binds to the myoglobin (Mb) cavity mutant, H93G, forming either a 5- or 6-coordinate Fe--NO heme complex. The H93G mutation replaces the proximal histidine of Mb with glycine, allowi...
Excited State Energy Transfer Pathways in Photosynthetic Reaction Centers.4.Asymmetric Energy Transfer in the Heterodimer Mutant
in-modified beta zeolite reductive solid-state ion exchange Lewis acidity m-xylene transformation
2016/5/23
In bacterial photosynthetic reaction centers, ultrafast singlet excited state energy transfer occurs from the monomeric bacteriochlorophylls, B, and bacteriopheophytins, H, to the homodimer special pa...
The H93G Myoglobin Cavity Mutant as a Versatile Template for Modeling Heme Proteins:Ferrous,Ferric,and Ferryl Mixed-Ligand Complexes with Imidazole in the Cavity
copper(II) azomethine imidate crystal structures
2016/5/23
One of the difficulties in preparing accurate ambient-temperature model complexes for heme proteins, particularly in the ferric state, has been the generation of mixed-ligand adducts: complexes with d...
Hydrogen Bonding Modulates Binding of Exogenous Ligands in a Myoglobin Proximal Cavity Mutant
Alanine Amino Acid Substitution Animals Binding Sites Glycine Histidine Hydrogen Bonding Imidazoles Ligands Macromolecular Substances Metmyoglobin Models, Chemical Mutagenesis, Insertional Myoglobin Nitric Oxide Nuclear Magnetic Resonance,Biomolecular Protons Serine Threonine Whales
2016/5/23
In the sperm whale myoglobin mutant H93G, the proximal histidine is replaced by glycine, leaving a cavity in which exogenous imidazole can bind and ligate the heme iron (Barrick, D. (1994) Biochemistr...
Vibrational Dynamics of Carbon Monoxide at the Active Sites of Mutant Heme Proteins
Vibrational Dynamics Carbon Monoxide Active Sites Mutant Heme Proteins
2016/5/23
Picosecond mid-IR pump−probe measurements of vibrational relaxation (VR) of CO bound to the active sites of wild-type and mutant myoglobins (Mb) reveal that an approximately linear relationship ...
Trans Effects in Nitric Oxide Binding to Myoglobin Cavity Mutant H93G
biology and medicine, basic studies nitric oxide biochemistry heme histidine imidazoles ligands mutants myoglobin proteins
2016/5/23
When nitric oxide (NO) binds to heme proteins, it exerts a repulsive trans effect on the proximal ligand, resulting in weakening or rupture of the proximal ligand-iron bond. The general question of wh...
Modulation of Protein Function by Exogenous Ligands in Protein Cavities:CO Binding to a Myoglobin Cavity Mutant Containing Unnatural Proximal Ligands
Animals Binding Sites Carbon Monoxide Cloning, Molecular Escherichia coli Heme Kinetics Ligands Magnetic Resonance Spectroscopy Mutagenesis, Site-Directed Myoglobin Myoglobin Point Mutation Protein Conformation ecombinant Proteins Recombinant Proteins Spectroscopy,Fourier Transform Infrared Valine Whales
2016/5/23
A variety of heterocyclic ligands can be exchanged into the proximal cavity of sperm whale myoglobin mutant H93G, providing a simple method for introduction of the equivalent of unnatural amino acid s...
Functional Aspects of Ultra-rapid Heme Doming in Hemoglobin,Myoglobin,and the Myoglobin Mutant H93G
Animals Carboxyhemoglobin Carboxyhemoglobin Heme Hemoglobins Hemoglobins Horses Kinetics Myoglobin Myoglobin Myoglobin Point Mutation Spectrum Analysis, Raman Time Factors Whales
2016/5/23
Heme iron out-of-plane displacement following ligand dissociation in hemoglobin, myoglobin, and the proximal cavity mutant H93G is shown to be as rapid as the heme iron out-of-plane vibrational period...
Biochemical Characterization and Electron-Transfer Reactions of sym1,a Rhodobacter capsulatus Reaction Center Symmetry Mutant which Affects the Initial Electron Donor
Biochemical Characterization Electron-Transfer Reactions sym1 Rhodobacter capsulatus Reaction Center Initial Electron Donor
2016/5/23
A 51 bp section of the Rhodobacter capsulatus photosynthetic reaction center M subunit gene (nucleotides M562-M612 of the pufM structural sequence) encoding amino acids M187-M203 was replaced by the h...
X-ray Crystal Structure of a Mutant Recombinant Human Myoglobin at 2.8Å Resolution
Humans Myoglobin Recombinant Proteins X-Ray Diffraction Protein Conformation Mutation Molecular Structure
2016/5/23
We have grown crystals in trigonal space group P 3 2 21 of a mutant human myoglobin, aquomet form, in which lysine at position 45 has been replaced by arginine and cysteine at position 110 has been re...
Stark Effect Spectroscopy of the Rhodobacter sphaeroides Reaction Center Heterodimer Mutant
Rhodobacter sphaeroides Macromolecular Substances Light-Harvesting Protein Complexes Photosynthetic Reaction Center Complex Proteins Bacterial Proteins Spectrophotometry Mutation Thermodynamics
2016/5/23
The effect of an electric field has been measured on the absorption spectrum (Stark effect) of the heterodimer mutant (M)H202L of Rhodobacter sphaeroides reaction centers, where the primary electron d...
Electrostatic Interactions in Wild Type and Mutant Recombinant Human Myoglobins
SUBSTANCE-P GABA PROLACTIN ANTERIOR PITUITARY HYPOTHALAMIC FRAGMENTS ANTI-SUBSTANCE-P SERUM
2016/5/20
Residue Val68 in human myoglobin has been replaced by Asn, Asp, and Glu with site-directed mutagenesis. Purified proteins were characterized by isoelectric focusing and by absorption, CD, and NMR spec...