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insertion genetics wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 methods 2 effects 3 see also 4 references 5 further reading toggle the table of contents insertion genetics 18 languages العربية беларуская bosanski کوردی deutsch español فارسی français galego nederlands norsk bokmål polski português русский srpskohrvatski српскохрватски српски srpski türkçe 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia redirected from insertion mutation type of mutation an illustration of an insertion at chromosome level in genetics an insertion also called an insertion mutation is the addition of one or more nucleotide base pairs into a dna sequence this can often happen in microsatellite regions due to the dna polymerase slipping insertions can be anywhere in size from one base pair incorrectly inserted into a dna sequence to a section of one chromosome inserted into another the mechanism of the smallest single base insertion mutations is believed to be through base pair separation between the template and primer strands followed by non neighbor base stacking which can occur locally within the dna polymerase active site 1 on a chromosome level an insertion refers to the insertion of a larger sequence into a chromosome this can happen due to unequal crossover during meiosis n region addition is the addition of non coded nucleotides during recombination by terminal deoxynucleotidyl transferase p nucleotide insertion is the insertion of palindromic sequences encoded by the ends of the recombining gene segments trinucleotide repeats are classified as insertion mutations 2 3 and sometimes as a separate class of mutations 4 methods edit zinc finger nuclease zfn transcription activator like effector nucleases talen and crispr gene editing are the three main methods used in the former research to achieve gene insertion and crispr cas tools have already become one of the most used methods to present research citation needed based on crispr cas tools different systems have already been developed to achieve specific functions for example one strategy is double strand nucleases cutting system using the normal cas9 protein with single guide rna sgrna and then achieving the gene insertion through end joining or dividing cells with the dna repair system 5 another example is the prime editing system which uses cas9 nickase and the prime editing guide rna pegrna carrying the target genes 5 one limitation of current technology is that the size for dna precise insertion is not large enough 6 to meet the demand for genome research rna guided dna transposition is an emerging area to solve this problem 7 more efficient methods are expected to be developed and applied in the genome engineering area effects edit insertions can be particularly hazardous if they occur in an exon the amino acid coding region of a gene a frameshift mutation an alteration in the normal reading frame of a gene results if the number of inserted nucleotides is not divisible by three i e the number of nucleotides per codon frameshift mutations will alter all the amino acids encoded by the gene following the mutation usually insertions and the subsequent frameshift mutation will cause the active translation of the gene to encounter a premature stop codon resulting in an end to translation and the production of a truncated protein transcripts carrying the frameshift mutation may also be degraded through nonsense mediated decay during translation thus not resulting in any protein product if translated the truncated proteins frequently are unable to function properly or at all and can result in any number of genetic disorders depending on the gene in which the insertion occurs 8 in frame insertions occur when the reading frame is not altered as a result of the insertion the number of inserted nucleotides is divisible by three the reading frame remains intact after the insertion and translation will most likely run to completion if the inserted nucleotides do not code for a stop codon however because of the inserted nucleotides the finished protein will contain depending on the size of the insertion multiple new amino acids that may affect the function of the protein citation needed see also edit indel insertional mutagenesis loss of function mutations gain of function mutations deletion genetics references edit banavali nilesh k 2013 partial base flipping is sufficient for strand slippage near dna duplex termini journal of the american chemical society 135 22 8274 8282 doi 10 1021 ja401573j pmid 23692220 mechanisms genetic variation types of mutations evolution 101 understanding evolution for teachers university of california museum of paleontology archived from the original on 2009 04 14 retrieved 2009 09 19 understanding evolution for teachers home retrieved on september 19 2009 brown terence a 2007 16 mutations and dna repair genomes 3 garland science p 510 isbn 978 0 8153 4138 3 faraone stephen v tsuang ming t tsuang debby w 1999 5 molecular genetics and mental illness the search for disease mechanisms types of mutations genetics of mental disorders a guide for students clinicians and researchers guilford press p 145 isbn 978 1 57230 479 6 1 2 anzalone andrew v koblan luke w liu david r 2020 genome editing with crispr cas nucleases base editors transposases and prime editors nature biotechnology 38 7 824 844 doi 10 1038 s41587 020 0561 9 pmid 32572269 s2cid 256820370 sun chao lei yuan li boshu gao qiang li yunjia cao wen yang chao li hongchao wang zhiwei li yan wang yanpeng liu jun zhao kevin tianmeng gao caixia 2023 precise integration of large dna sequences in plant genomes using primeroot editors nature biotechnology 1 12 doi 10 1038 s41587 023 01769 w pmid 37095350 s2cid 258311438 wang joy y doudna jennifer a 2023 crispr technology a decade of genome editing is only the beginning science 379 6629 eadd8643 doi 10 1126 science add8643 pmid 36656942 s2cid 255966509 shmilovici a ben gal i 2007 using a vom model for reconstructing potential coding regions in est sequences pdf journal of computational statistics 22 1 49 69 doi 10 1007 s00180 007 0021 8 s2cid 2737235 archived from the original pdf on 2020 05 31 retrieved 2014 01 10 further reading edit pierce benjamin a 2013 genetics a conceptual approach 5th ed w h freeman isbn 978 1 4641 5084 5 wikimedia commons has media related to insertion genetics v t e mutation mechanisms of mutation insertion deletion substitution transversion transition mutation with respect to structure point mutation nonsense mutation missense mutation conservative mutation silent mutation frameshift mutation dynamic mutation large scale mutation chromosomal translocations chromosomal inversions mutation with respect to overall fitness deleterious mutation advantageous mutation neutral mutation nearly neutral mutation synonymous mutation nonsynonymous mutation retrieved from https en wikipedia org w index php title insertion_ genetics oldid 1363447349 category mutation hidden categories articles with short description short description is different from wikidata all articles with unsourced statements articles with unsourced statements from february 2025 commons category link is on wikidata this page was last edited on 10 july 2026 at 06 19 utc page was rendered with parsoid text is 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