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Chemical biology is a scientific discipline spanning the fields of chemistry and biology that involves the application of chemical techniques and tools, often compounds produced through synthetic chemistry, to the study and manipulation of biological systems. Chemistry (from Egyptian kēme (chem meaning "earth") is the Science concerned with the composition structure and properties Foundations of modern biology There are five unifying principles In Chemistry, chemical synthesis is purposeful execution of Chemical reactions in order to get a product, or several products

Contents

Introduction

Some forms of chemical biology attempt to answer biological questions by directly probing living systems at the chemical level. In contrast to research using biochemistry, genetics, or molecular biology, where mutagenesis can provide a new version of the organism or cell of interest, chemical biology studies sometime probe systems in vitro and in vivo with small molecules that have been designed for a specific purpose or identified on the basis of biochemical or cell-based screening. Biochemistry is the study of the chemical processes in living Organisms It deals with the Structure and function of cellular components such as Genetics (from Ancient Greek grc-Latn genetikos, “genitive” and that from grc-Latn genesis, “origin” a discipline of Biology, is Molecular biology is the study of Biology at a molecular level Site-directed Mutagenesis is a Molecular biology technique in which a Mutation is created at a defined site in a DNA molecule usually a circular In vitro ( Latin: within the glass refers to the technique of performing a given experiment in a controlled environment outside of a living Organism In vivo ( Latin: within the living means that which takes place inside an organism. In Pharmacology, a small molecule is a small Organic compound that is biologically active ( Biomolecule) but is not a Polymer.

Chemical biology is one of many interfacial sciences that are characteristic of a general trend away from older, reductionist fields toward those whose goals are to achieve a description of scientific holism. Reductionism can either mean (a an approach to understanding the nature of complex things by reducing them to the interactions of their parts or to simpler or more fundamental things Distinguish from the suffix -holism, which describes addictions In this sense, it is related to other fields such as proteomics. Proteomics is the large-scale study of Proteins particularly their structures and functions. Chemical biology has historical and philosophical roots in medicinal chemistry, supramolecular chemistry (particularly host-guest chemistry), bioorganic chemistry, pharmacology, genetics, biochemistry, and metabolic engineering. Supramolecular chemistry refers to the area of Chemistry that focuses on the Noncovalent bonding interactions of molecules In Supramolecular chemistry, host-guest chemistry describes complexes that are composed of two or more Molecules or Ions held together in unique Bioorganic chemistry is a rapidly growing Scientific discipline which combines Organic chemistry and Biochemistry. Pharmacology (from Greek grc φάρμακον pharmakon, "drug" and grc -λογία -logia) is the study of how Drugs Genetics (from Ancient Greek grc-Latn genetikos, “genitive” and that from grc-Latn genesis, “origin” a discipline of Biology, is Biochemistry is the study of the chemical processes in living Organisms It deals with the Structure and function of cellular components such as Metabolic engineering is the practice of optimizing genetic and regulatory processes within cells to increase the cells' production of a certain substance

Systems of interest

Proteomics

After the completion of the human genome project, many scientists realized the next big target would be the human proteome. The Human Genome Project (HGP was an international Scientific research project with a primary goal to determine the sequence of chemical base pairs which make up DNA The proteome is the entire complement of Proteins expressed by a genome cell tissue or organism As genes ultimately encode cellular proteins, the purpose and ultimate destination of proteins in cells is technically encoded as well. History See also History of genetics The existence of genes was first suggested by Gregor Mendel (1822-1884 who in the 1860s studied inheritance However, in practice, the ability to determine the structure, let alone function, of a protein just from its genetic sequence is impossible. Chemical biology is attempting to answer many questions about the function, structure, affinity and location of all the proteins within a living cell.

The global analysis of the proteome is called proteomics. Proteomics is the large-scale study of Proteins particularly their structures and functions. The major challenge in proteomics is that in any given tissue, there are approximately 10,000 different proteins being expressed at levels that vary by as much as six orders of magnitude. Chemical biologist Stuart Schreiber advocates building a “perturbogen” library of small molecules that could specifically activate or deactivate every protein in the human body. Stuart L Schreiber (b February 6, 1956) is a scientist at Harvard University and the Broad Institute of Harvard and MIT A library is a collection of information sources resources and services and the structure in which it is housed it is organized for use and maintained by a public body an institution The human body is the entire physical and mental structure of a Human Organism. Schreiber estimates such a project would require at least a decade. A decade is a period of 10 Years (since 1594 a factor of 10 difference between two numbers, or sometimes a set or a group of ten (since 1451 A purpose of the library would be to enable biomedical engineers to develop therapies more efficiently. A number of scientists have developed ways to break the proteome down into meaningful pieces that can be studied more easily. Notably, activity based proteomics developed by Benjamin Cravatt III uses specially designed chemical probes to analyze classes of active enzymes in within a tissue. Activity based proteomics or activity based protein profiling (ABPP is a functional proteomic technology that uses specially designed chemical probes that react with mechanistically-related Benjamin Franklin Cravatt is a professor in and chair of the Department of Chemical Physiology at The Scripps Research Institute in La Jolla California

Another challenge of chemical biology is to decipher the myriad signal transduction pathways involving kinase and phosphatase signaling. In Biology, signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another In Chemistry and Biochemistry, a kinase, alternatively known as a phosphotransferase, is a type of Enzyme that transfers Phosphate A phosphatase is an Enzyme that removes a Phosphate group from its Substrate by hydrolysing Phosphoric acid mono Esters into In this regard, Kevan Shokat at UCSF has developed a method for selectively inhibiting a given kinase upon the addition of an otherwise biologically orthogonal competitive inhibitor (1-napthylmethyl-PP1). Shokat's technique involves altering a protein kinase (by mutating the so-called "gatekeeper" residue in the kinase catalytic domain) to contain an unnatural hydrophobic binding pocket which distinguishes it from the other highly homologous cellular kinases, allowing it to be selectively inhibited. A related method has been developed in his lab which uses these so-called "analog-sensitive" kinases to label their substrates using an unnatural ATP (adenosine triphosphate) analog, facilitating their visualization and identification. Adenosine-5'-triphosphate ( ATP) is a multifunctional Nucleotide that is most important as a " molecular currency" of intracellular Energy Identification of enzyme substrates (of which there may be hundreds or thousands, many of which are unknown) is a problem of significant difficulty in proteomics and is vital to the understanding of signal transduction pathways in cells; techniques for labelling cellular substrates of enzymes are a typical approach used by chemical biologists to address this problem.

Many researchers are working on ways to manipulate the way that proteins are assembled by cellular systems. In this regard, Peter Schultz at the Scripps Research Institute has evolved bacteria to install synthetic, non-natural amino acids into proteins. Peter G Schultz (born June 23, 1956 in Cincinnati Ohio) is currently a Professor of Chemistry at The Scripps Research Institute and Director The Scripps Research Institute ( TSRI) is a Medical research facility that focuses on research in the basic Biomedical sciences Primarily located

Glycobiology

While DNA, RNA and proteins are all encoded at the genetic level, there exists a separate system of trafficked molecules in the cell that are not encoded directly at any direct level: sugars. Deoxyribonucleic acid ( DNA) is a Nucleic acid that contains the genetic instructions used in the development and functioning of all known Ribonucleic acid ( RNA) is a Nucleic acid that consists of a long chain of Nucleotide units Thus, glycobiology is an area of dense research for chemical biologists. Glycomics, an analogous term to Genomics and Proteomics, is the comprehensive study of Glycomes (the entire complement of Sugars whether free For instance, live cells can be supplied with synthetic variants of natural sugars in order to probe the function of the sugars in vivo. Carolyn Bertozzi at University of California, Berkeley has developed a method for site-specifically reacting molecules the surface of cells that have been labeled with synthetic sugars. Dr Carolyn Ruth Bertozzi is an award-winning chemist. She is the T The University of California Berkeley (also referred to as Cal, Berkeley and UC Berkeley) is a major research university located in Berkeley

Combinatorial chemistry

Some chemical biologists use automated synthesis of many diverse compounds in order to experiment with effects of small molecules on biological processes. More specifically, they observe changes in the behaviors of proteins when small molecules bind to them. Proteins are large Organic compounds made of Amino acids arranged in a linear chain and joined together by Peptide bonds between the Carboxyl Such experiments may supposedly lead to discovery of small molecules with antibiotic or chemotherapeutic properties. In modern usage an antibiotic is a Chemotherapeutic agent with activity against Microorganisms such as Bacteria, fungi or Protozoa Indeed, some scientists (such as Jon Clardy of the Harvard Medical School) hope chemical biology will lead to cures for malaria, tuberculosis, and AIDS. Harvard Medical School ( HMS) is one of the graduate schools of Harvard University and currently the #1 medical school in America as ranked by U Malaria is a vector -borne Infectious disease caused by Protozoan Parasites It is widespread in tropical and subtropical regions including Tuberculosis (abbreviated as TB for tubercle bacillus or T u' b' erculosis Bacillus --> is a common

Employing biology

Many research programs are also focused on employing natural biomolecules to perform a task or act as support for a new chemical method or material. In this regard, researchers have shown that DNA can serve as a template for synthetic chemistry, self-assembling proteins can serve as a structural scaffold for new materials, and RNA can be evolved in vivo to produce new catalytic function.

Publications

External links

Dictionary

chemical biology

-noun

  1. a field of study that embraces both chemistry and biology
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