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Types of mutations that can be introduced by random, site-directed, combinatorial, or insertional mutagenesis. In molecular biology, mutagenesis is an important laboratory technique whereby DNA mutations are deliberately engineered to produce libraries of mutant genes, proteins, strains of bacteria, or other genetically modified organisms.
Site-directed mutagenesis is used to generate mutations that may produce a rationally designed protein that has improved or special properties (i.e.protein engineering). Investigative tools – specific mutations in DNA allow the function and properties of a DNA sequence or a protein to be investigated in a rational approach. Furthermore ...
The post-replicative Mismatch Repair System (MMRS) of Escherichia coli involves MutS (Mutator S), MutL and MutH proteins, and acts to correct point mutations or small insertion/deletion loops produced during DNA replication. [1] MutS and MutL are involved in preventing recombination between partially homologous DNA sequences.
In the laboratory, mutagenesis is a technique by which DNA mutations are deliberately engineered to produce mutant genes, proteins, or strains of organisms. Various constituents of a gene, such as its control elements and its gene product, may be mutated so that the function of a gene or protein can be examined in detail.
Here, protein domains act as modules, each with a particular and independent function, that can be mixed together to produce genes encoding new proteins with novel properties. [15] For example, the human eye uses four genes to make structures that sense light: three for cone cell or colour vision and one for rod cell or night vision; all four ...
The gene products are, therefore, called the "Mut" proteins, and are the major active components of the mismatch repair system. Three of these proteins are essential in detecting the mismatch and directing repair machinery to it: MutS, MutH and MutL (MutS is a homologue of HexA and MutL of HexB).
DNA mismatch repair protein Msh2 also known as MutS homolog 2 or MSH2 is a protein that in humans is encoded by the MSH2 gene, which is located on chromosome 2.MSH2 is a tumor suppressor gene and more specifically a caretaker gene that codes for a DNA mismatch repair (MMR) protein, MSH2, which forms a heterodimer with MSH6 to make the human MutSα mismatch repair complex.
Furthermore, the synthesis of diverse genes can also result in the production of proteins with novel attributes. [1] Therefore, DNA shuffling has been used to develop proteins to detoxify chemicals. [ 3 ] [ 27 ] For example, the homologous recombination method of DNA shuffling by molecular breeding has been utilized to enhance the ...