Photosystem I, the Glossary
Photosystem I (PSI, or plastocyanin–ferredoxin oxidoreductase) is one of two photosystems in the photosynthetic light reactions of algae, plants, and cyanobacteria.[1]
Table of Contents
63 relations: Adenosine triphosphate, Algae, Amino acid, Biohybrid solar cell, Calcium, Carotenoid, Chemiosmosis, Chlorophyll, Chlorophyll a, Cofactor (biochemistry), Coordination complex, Cyanobacteria, Cysteine, Cytochrome b6f complex, Dimerization (chemistry), Electric potential, Electron transfer, Electron transport chain, Energy, Enzyme, Förster resonance energy transfer, Ferredoxin, Ferredoxin—NADP(+) reductase, Green sulfur bacteria, Integral membrane protein, Iron-sulfur protein, Iron–sulfur cluster, Β-Carotene, Leucine zipper, Light, Light-dependent reactions, Light-harvesting complexes of green plants, Lipid, Magnesium, Molecular binding, Nanometre, Nicotinamide adenine dinucleotide phosphate, P700, Phosphatidylglycerol, Phospholipid, Photoexcitation, Photosynthetic reaction centre protein family, Photosystem, Photosystem II, Phytomenadione, Pigment, Plant, Plastocyanin, Protein, Protein complex, ... Expand index (13 more) »
- EC 1.97.1
- Light reactions
Adenosine triphosphate
Adenosine triphosphate (ATP) is a nucleotide that provides energy to drive and support many processes in living cells, such as muscle contraction, nerve impulse propagation, and chemical synthesis.
See Photosystem I and Adenosine triphosphate
Algae
Algae (alga) are any of a large and diverse group of photosynthetic, eukaryotic organisms.
Amino acid
Amino acids are organic compounds that contain both amino and carboxylic acid functional groups.
See Photosystem I and Amino acid
Biohybrid solar cell
A biohybrid solar cell is a solar cell made using a combination of organic matter (photosystem I) and inorganic matter.
See Photosystem I and Biohybrid solar cell
Calcium
Calcium is a chemical element; it has symbol Ca and atomic number 20.
Carotenoid
Carotenoids are yellow, orange, and red organic pigments that are produced by plants and algae, as well as several bacteria, archaea, and fungi. Photosystem I and Carotenoid are photosynthesis.
See Photosystem I and Carotenoid
Chemiosmosis
Chemiosmosis is the movement of ions across a semipermeable membrane bound structure, down their electrochemical gradient.
See Photosystem I and Chemiosmosis
Chlorophyll
Chlorophyll is any of several related green pigments found in cyanobacteria and in the chloroplasts of algae and plants.
See Photosystem I and Chlorophyll
Chlorophyll a
Chlorophyll a is a specific form of chlorophyll used in oxygenic photosynthesis. It absorbs most energy from wavelengths of violet-blue and orange-red light, and it is a poor absorber of green and near-green portions of the spectrum. Chlorophyll does not reflect light but chlorophyll-containing tissues appear green because green light is diffusively reflected by structures like cell walls.
See Photosystem I and Chlorophyll a
Cofactor (biochemistry)
A cofactor is a non-protein chemical compound or metallic ion that is required for an enzyme's role as a catalyst (a catalyst is a substance that increases the rate of a chemical reaction).
See Photosystem I and Cofactor (biochemistry)
Coordination complex
A coordination complex is a chemical compound consisting of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents.
See Photosystem I and Coordination complex
Cyanobacteria
Cyanobacteria, also called Cyanobacteriota or Cyanophyta, are a phylum of autotrophic gram-negative bacteria that can obtain biological energy via oxygenic photosynthesis. Photosystem I and Cyanobacteria are photosynthesis.
See Photosystem I and Cyanobacteria
Cysteine
Cysteine (symbol Cys or C) is a semiessential proteinogenic amino acid with the formula.
See Photosystem I and Cysteine
Cytochrome b6f complex
The cytochrome b6f complex (plastoquinol/plastocyanin reductase or plastoquinol/plastocyanin oxidoreductase) is an enzyme found in the thylakoid membrane in chloroplasts of plants, cyanobacteria, and green algae, that catalyzes the transfer of electrons from plastoquinol to plastocyanin: The reaction is analogous to the reaction catalyzed by cytochrome bc1 (Complex III) of the mitochondrial electron transport chain. Photosystem I and cytochrome b6f complex are light reactions.
See Photosystem I and Cytochrome b6f complex
Dimerization (chemistry)
In chemistry, dimerization is the process of joining two identical or similar molecular entities by bonds.
See Photosystem I and Dimerization (chemistry)
Electric potential
Electric potential (also called the electric field potential, potential drop, the electrostatic potential) is defined as the amount of work/energy needed per unit of electric charge to move the charge from a reference point to a specific point in an electric field.
See Photosystem I and Electric potential
Electron transfer
Electron transfer (ET) occurs when an electron relocates from an atom or molecule to another such chemical entity.
See Photosystem I and Electron transfer
Electron transport chain
An electron transport chain (ETC) is a series of protein complexes and other molecules which transfer electrons from electron donors to electron acceptors via redox reactions (both reduction and oxidation occurring simultaneously) and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.
See Photosystem I and Electron transport chain
Energy
Energy is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light.
Enzyme
Enzymes are proteins that act as biological catalysts by accelerating chemical reactions.
Förster resonance energy transfer
Förster resonance energy transfer (FRET), fluorescence resonance energy transfer, resonance energy transfer (RET) or electronic energy transfer (EET) is a mechanism describing energy transfer between two light-sensitive molecules (chromophores).
See Photosystem I and Förster resonance energy transfer
Ferredoxin
Ferredoxins (from Latin ferrum: iron + redox, often abbreviated "fd") are iron–sulfur proteins that mediate electron transfer in a range of metabolic reactions. Photosystem I and Ferredoxin are photosynthesis.
See Photosystem I and Ferredoxin
Ferredoxin—NADP(+) reductase
In enzymology, a ferredoxin-NADP reductase abbreviated FNR, is an enzyme that catalyzes the chemical reaction The 3 substrates of this enzyme are reduced ferredoxin, NADP+, and H+, whereas its two products are oxidized ferredoxin and NADPH.
See Photosystem I and Ferredoxin—NADP(+) reductase
Green sulfur bacteria
The green sulfur bacteria are a phylum, Chlorobiota, of obligately anaerobic photoautotrophic bacteria that metabolize sulfur.
See Photosystem I and Green sulfur bacteria
Integral membrane protein
An integral, or intrinsic, membrane protein (IMP) is a type of membrane protein that is permanently attached to the biological membrane.
See Photosystem I and Integral membrane protein
Iron-sulfur protein
Iron–sulfur proteins are proteins characterized by the presence of iron–sulfur clusters containing sulfide-linked di-, tri-, and tetrairon centers in variable oxidation states.
See Photosystem I and Iron-sulfur protein
Iron–sulfur cluster
Iron–sulfur clusters are molecular ensembles of iron and sulfide.
See Photosystem I and Iron–sulfur cluster
Β-Carotene
β-Carotene (beta-carotene) is an organic, strongly colored red-orange pigment abundant in fungi, plants, and fruits.
See Photosystem I and Β-Carotene
Leucine zipper
A leucine zipper (or leucine scissors) is a common three-dimensional structural motif in proteins.
See Photosystem I and Leucine zipper
Light
Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye.
Light-dependent reactions
Light-dependent reactions are certain photochemical reactions involved in photosynthesis, the main process by which plants acquire energy. Photosystem I and Light-dependent reactions are light reactions and photosynthesis.
See Photosystem I and Light-dependent reactions
Light-harvesting complexes of green plants
The light-harvesting complex (or antenna complex; LH or LHC) is an array of protein and chlorophyll molecules embedded in the thylakoid membrane of plants and cyanobacteria, which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem. Photosystem I and light-harvesting complexes of green plants are photosynthesis.
See Photosystem I and Light-harvesting complexes of green plants
Lipid
Lipids are a broad group of organic compounds which include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E and K), monoglycerides, diglycerides, phospholipids, and others.
Magnesium
Magnesium is a chemical element; it has symbol Mg and atomic number 12.
See Photosystem I and Magnesium
Molecular binding
Molecular binding is an attractive interaction between two molecules that results in a stable association in which the molecules are in close proximity to each other.
See Photosystem I and Molecular binding
Nanometre
molecular scale. The nanometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: nm), or nanometer (American spelling), is a unit of length in the International System of Units (SI), equal to one billionth (short scale) of a meter (0.000000001 m) and to 1000 picometres.
See Photosystem I and Nanometre
Nicotinamide adenine dinucleotide phosphate
Nicotinamide adenine dinucleotide phosphate, abbreviated NADP or, in older notation, TPN (triphosphopyridine nucleotide), is a cofactor used in anabolic reactions, such as the Calvin cycle and lipid and nucleic acid syntheses, which require NADPH as a reducing agent ('hydrogen source').
See Photosystem I and Nicotinamide adenine dinucleotide phosphate
P700
P700, or photosystem I primary donor, is a molecular dimer of chlorophyll ''a'' associated with the reaction-center of photosystem I in plants, algae, and cyanobacteria. Photosystem I and P700 are light reactions and photosynthesis.
Phosphatidylglycerol
Phosphatidylglycerol is a glycerophospholipid found in pulmonary surfactant and in the plasma membrane where it directly activates lipid-gated ion channels.
See Photosystem I and Phosphatidylglycerol
Phospholipid
Phospholipids are a class of lipids whose molecule has a hydrophilic "head" containing a phosphate group and two hydrophobic "tails" derived from fatty acids, joined by an alcohol residue (usually a glycerol molecule).
See Photosystem I and Phospholipid
Photoexcitation
Photoexcitation in crystal Photoexcitation is the production of an excited state of a quantum system by photon absorption.
See Photosystem I and Photoexcitation
Photosynthetic reaction centre protein family
Photosynthetic reaction centre proteins are main protein components of photosynthetic reaction centres (RCs) of bacteria and plants.
See Photosystem I and Photosynthetic reaction centre protein family
Photosystem
Photosystems are functional and structural units of protein complexes involved in photosynthesis. Photosystem I and Photosystem are light reactions and photosynthesis.
See Photosystem I and Photosystem
Photosystem II
Photosystem II (or water-plastoquinone oxidoreductase) is the first protein complex in the light-dependent reactions of oxygenic photosynthesis. Photosystem I and Photosystem II are light reactions and photosynthesis.
See Photosystem I and Photosystem II
Phytomenadione
Phytomenadione, also known as vitamin K1 or phylloquinone, is a vitamin found in food and used as a dietary supplement.
See Photosystem I and Phytomenadione
Pigment
A pigment is a powder used to add color or change visual appearance.
Plant
Plants are the eukaryotes that form the kingdom Plantae; they are predominantly photosynthetic.
Plastocyanin
Plastocyanin is a copper-containing protein that mediates electron-transfer. Photosystem I and Plastocyanin are photosynthesis.
See Photosystem I and Plastocyanin
Protein
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues.
Protein complex
A protein complex or multiprotein complex is a group of two or more associated polypeptide chains. Photosystem I and protein complex are protein complexes.
See Photosystem I and Protein complex
Protein subunit
In structural biology, a protein subunit is a polypeptide chain or single protein molecule that assembles (or "coassembles") with others to form a protein complex.
See Photosystem I and Protein subunit
Redox
Redox (reduction–oxidation or oxidation–reduction) is a type of chemical reaction in which the oxidation states of the reactants change.
Solubility
In chemistry, solubility is the ability of a substance, the solute, to form a solution with another substance, the solvent.
See Photosystem I and Solubility
Spinach
Spinach (Spinacia oleracea) is a leafy green flowering plant native to central and Western Asia.
Structural motif
In a chain-like biological molecule, such as a protein or nucleic acid, a structural motif is a common three-dimensional structure that appears in a variety of different, evolutionarily unrelated molecules.
See Photosystem I and Structural motif
Thylakoid
Thylakoids are membrane-bound compartments inside chloroplasts and cyanobacteria. Photosystem I and Thylakoid are photosynthesis.
See Photosystem I and Thylakoid
Transmembrane domain
A transmembrane domain (TMD) is a membrane-spanning protein domain.
See Photosystem I and Transmembrane domain
Turn (biochemistry)
A turn is an element of secondary structure in proteins where the polypeptide chain reverses its overall direction.
See Photosystem I and Turn (biochemistry)
Upstream and downstream (DNA)
In molecular biology and genetics, upstream and downstream both refer to relative positions of genetic code in DNA or RNA.
See Photosystem I and Upstream and downstream (DNA)
Visible spectrum
The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye.
See Photosystem I and Visible spectrum
Volt
The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI).
Wavelength
In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats.
See Photosystem I and Wavelength
Ycf4 protein domain
In molecular biology, the Ycf4 protein is involved in the assembly of the photosystem I complex which is part of an energy-harvesting process named photosynthesis. Photosystem I and Ycf4 protein domain are photosynthesis.
See Photosystem I and Ycf4 protein domain
See also
EC 1.97.1
- (Formate-C-acetyltransferase)-activating enzyme
- Chlorate reductase
- Perchlorate reductase
- Photosystem I
- Pyrogallol hydroxytransferase
- Reductive dehalogenases
- Selenate reductase
- Tetrachloroethene reductive dehalogenase
Light reactions
- Chlorophyll fluorescence
- Cytochrome b6f complex
- Light-dependent reactions
- Oxygen-evolving complex
- P680
- P700
- Photophosphorylation
- Photosynthetic reaction centre
- Photosystem
- Photosystem I
- Photosystem II
- Plastoquinone
- Semiquinone
References
[1] https://en.wikipedia.org/wiki/Photosystem_I
Also known as EC 1.97.1.12, Lastocyanin:ferredoxin oxidoreductase, Lastocyanin:ferredoxin oxidoreductase (light-dependent), PS I, PS I complex, Photo system I, Photosystem 1, Photosystem I protein A1, Plastocyanin:ferredoxin oxidoreductase (light-dependent).
, Protein subunit, Redox, Solubility, Spinach, Structural motif, Thylakoid, Transmembrane domain, Turn (biochemistry), Upstream and downstream (DNA), Visible spectrum, Volt, Wavelength, Ycf4 protein domain.