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Encyclopedia > Esterase

An esterase is an hydrolase enzyme that splits esters into a acid and an alcohol in a chemical reaction with water called hydrolysis. A wide range of different esterases exist that differ in their substrate specificity, their protein structure, and their biological function. In biochemistry, a hydrolase is an enzyme that can break a chemical bond by hydrolysis. ... Ribbon diagram of the catalytically perfect enzyme TIM. An enzyme is a protein that catalyzes, or speeds up, a chemical reaction. ... General formula of an ester of a carboxylic acid. ... An acid (from Arabic Azait meaning oil, often represented by the generic formula AH) is typically a water-soluble, sour-tasting chemical compound. ... In general usage, alcohol (from Arabic al-kukhūl الكحول = the spirit, the chemical.) refers almost always to ethanol, also known as grain alcohol, and often to any beverage that contains ethanol (see alcoholic beverage). ... A chemical reaction is a process that results in the interconversion of chemical substances . ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... Hydrolysis is a chemical process in which a molecule is cleaved into two parts by the addition of a molecule of water. ... The word substrate can mean the following: In biochemistry, a substrate is a molecule which is acted upon by an enzyme. ... Proteins are amino acid chains, made up from 20 different L-α-amino acids, also referred to as residues, that fold into unique three-dimensional protein structures. ...

Contents


List of esterases

A lipase is a water-soluble enzyme that catalyzes the hydrolysis of ester bonds in water–insoluble, lipid substrates. ... This article is about lipid molecules. ... Figure 1: Structure of a Lipid. ... In chemistry, especially biochemistry, a fatty acid is a carboxylic acid (or organic acid), often with a long aliphatic tail (long chains), either saturated or unsaturated. ... ... A phospholipase is an enzyme that converts phospholipids into fatty acids and other lipophilic substances. ... Two schematic representations of a phospholipid. ... Lipoprotein lipase (EC 3. ... Figure 1: Structure of a Lipid. ... A lipoprotein is a biochemical assembly that contains both proteins and lipids and may be structural or catalytic in function. ... An acid hydrolase is an enzyme that works best at acidic pHs. ... Lysozome could mean: Lysosome Lysozyme This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Acetyl is the radical of acetic acid. ... In ecology functional groups are collections of organisms based on morphological, physiological, behavioral, biochemical, or environmental responses or on trophic criteria. ... Acetylcholinesterase In biochemistry, cholinesterase is a term which refers to one of the two enzymes: Acetylcholinesterase (EC 3. ... Neurotransmitters are chemicals that are used to relay, amplify and modulate electrical signals between a neuron and another cell. ... The chemical compound acetylcholine, often abbreviated as ACh, was the first neurotransmitter to be identified. ... Blood plasma is the liquid component of blood, in which the blood cells are suspended. ... The liver is one of the largest internal organs of the human body. ... A nuclease is an enzyme capable of cleaving the phosphodiester bonds between the nucleotide subunits of nucleic acids. ... A nucleotide is a chemical compound that consists of a heterocyclic base, a sugar, and one or more phosphate groups. ... A nucleic acid is a complex, high-molecular-weight biochemical macromolecule composed of nucleotide chains that convey genetic information. ... Endonucleases are enzymes that cleave the phosphodiester bond within a nucleotide chain. ... Exonucleases are enzymes that cleave nucleotides one at a time from an end of a polynucleotide chain. ... Ribonuclease (RNase) is an enzyme that catalyzes the breakdown of RNA into smaller components. ... Ribonucleic acid (RNA) is a nucleic acid polymer consisting of covalently bound nucleotides. ... The enzyme RNase H (EC 3. ... A deoxyribonuclease (DNase, for short) is any enzyme that catalyzes the hydrolytic cleavage of phosphodiester linkages in the DNA backbone. ... Ribonucleic acid (RNA) is a nucleic acid polymer consisting of covalently bound nucleotides. ... A restriction enzyme (or restriction endonuclease) is an enzyme that cuts double-stranded DNA. The enzyme makes two incisions, one through each of the phosphate backbones of the double helix without damaging the bases. ... A phosphatase is an enzyme that hydrolyses phosphoric acid monoesters into a phosphate ion and a molecule with a free hydroxy group. ... In chemistry, a phosphate is a polyatomic ion or radical consisting of one phosphorus atom and four oxygen. ... Alkaline phosphatase, drawn from PDB 1ANI. Alkaline phosphatase (ALP) (EC 3. ... Diagram of phosphodiester bonds between nucleotides A phosphodiester bond is a group of strong covalent bonds between the phosphorus atom in a phosphate group and two other molecules over two ester bonds. ... In biology, second messengers are low-weight diffusible molecules that are used in signal transduction to relay a signal within a cell. ... The term camp—normally used as an adjective, even though earliest recorded uses employed it mainly as a verb—refers to the deliberate and sophisticated use of kitsch, mawkish or corny themes and styles in art, clothing or conversation. ... Image:PDE5 1. ... Sildenafil citrate, sold under the names Viagra, Revatio and (in the Indian subcontinent) Caverta, is a drug used to treat male erectile dysfunction (impotence) and pulmonary arterial hypertension (PAH), developed by the pharmaceutical company Pfizer. ... Fructose bisphosphatase Fructose bisphosphatase (EC 3. ... Gluconeogenesis, ultimately, is the generation of glucose from noncarbohydrate sources like lactate, glycerol, and amino acids. ... Ubiquitin carboxy-terminal hydrolase L1 (UCH-L1) (EC 3. ... Hemagglutinin-esterase is a protein that we can find in the envelope of some viruses. ...

EC classification

Esterases are classified as EC 3.1 in the EC number classification of enzymes. They are further subclassified into: EC numbers (Enzyme Commission numbers) are a numerical classification scheme for enzymes, based on the chemical reactions they catalyze. ...

  • EC 3.1.1: Carboxylic ester hydrolases
  • EC 3.1.2: Thiolester hydrolases
  • EC 3.1.3: Phosphoric monoester hydrolases
  • EC 3.1.4: Phosphoric diester hydrolases
  • EC 3.1.5: Triphosphoric monoester hydrolases
  • EC 3.1.6: Sulfuric ester hydrolases (sulfatases)
  • EC 3.1.7: Diphosphoric monoester hydrolases
  • EC 3.1.8: Phosphoric triester hydrolases
  • EC 3.1.11: Exodeoxyribonucleases producing 5'-phosphomonoesters
  • EC 3.1.13: Exoribonucleases producing 5'-phosphomonoesters
  • EC 3.1.14: Exoribonucleases producing 3'-phosphomonoesters
  • EC 3.1.15: Exonucleases active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters
  • EC 3.1.16: Exonucleases active with either ribo- or deoxyribonucleic acids and producing 3'-phosphomonoesters
  • EC 3.1.21: Endodeoxyribonucleases producing 5'-phosphomonoesters
  • EC 3.1.22: Endodeoxyribonucleases producing 3'-phosphomonoesters
  • EC 3.1.23: Site specific endodeoxyribonucleases: cleavage is sequence specific (discontinued)
  • EC 3.1.24: Site specific endodeoxyribonucleases: cleavage is not sequence specific (discontinued)
  • EC 3.1.25: Site-specific endodeoxyribonucleases specific for altered bases
  • EC 3.1.26: Endoribonucleases producing 5'-phosphomonoesters
  • EC 3.1.27: Endoribonucleases producing 3'-phosphomonoesters
  • EC 3.1.30: Endoribonucleases active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters
  • EC 3.1.31: Endoribonucleases active with either ribo- or deoxyribonucleic acids and producing 3'-phosphomonoesters

External links

  • Enzyme nomenclature

See also


  Results from FactBites:
 
Esterase - Wikipedia, the free encyclopedia (281 words)
An esterase is a hydrolase enzyme that splits esters into an acid and an alcohol in a chemical reaction with water called hydrolysis.
A wide range of different esterases exist that differ in their substrate specificity, their protein structure, and their biological function.
Esterases are classified as EC 3.1 in the EC number classification of enzymes.
Use of sulfated polysaccharides to inhibit pancreatic cholesterol esterase - United States Patent 5,017,565 (3609 words)
The present invention is directed to a method for decreasing intestinal absorption of cholesterol and fatty acid by inhibiting human pancreatic cholesterol esterase, a key enzyme involved in mediating absorption, by orally administering sulfated polysaccharides in an amount effective for inhibiting cholesterol esterase.
This compound inhibited cholesterol esterase with an IC.sub.50 of 0.06.mu.g/ml or 0.025 nM.
This sulfated pectin inhibited cholesterol esterase with an IC.sub.50 of 0.04.mu.g/ml or 2 nM.
  More results at FactBites »

 
 

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