Neoschizomer

Type of restriction enzymes
Recognition sequences and products of neoschizomers

Neoschizomers are restriction enzymes that recognize the same nucleotide sequence, but cleave at different sites. The first restriction enzyme discovered to recognize a sequence is called the prototype, and others that recognize the same sequence are isoschizomers. Neoschizomers are a subset of isoschizomers.[1]

For example, MaeII is the prototype enzyme for the sequence "ACGT", with the cleavage site A↓CGT. One of its neoschizomers, Tsp49I, also recognizes the sequence "ACGT", but cleaves at ACGT↓.[2]

Another example is SmaI (CCC↓GGG), which is a neoschizomer of XmaI (C↓CCGGG).[3]

Use in molecular biology

  • Rebase restriction enzyme database, http://rebase.neb.com/rebase/

See also

Wikidata has the property:
  • neoschizomer (P4875) (see uses)

References

  1. ^ "Isoschizomers". New England Biolabs. Retrieved 2024-09-12.
  2. ^ Welch, S. (1996-05-15). "Tsp49I (ACGT↓), a Thermostable Neoschizomer of the Type II Restriction Endonuclease Mae II (A↓CGT), Discovered in Isolates of the Genus Thermus from the Azores, Iceland and New Zealand". Nucleic Acids Research. 24 (10): 1799–1801. doi:10.1093/nar/24.10.1799. PMC 145888. PMID 8657557.
  3. ^ Withers, Barbara E.; Dunbar, Joan C. (1995). "DNA determinants in sequence-specific recognition by Xm al endonuclease". Nucleic Acids Research. 23 (17): 3571–3577. doi:10.1093/nar/23.17.3571. PMC 307239. PMID 7567471.
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Restriction modification system: restriction enzyme
Basic Concept
  • Isoschizomer
  • Neoschizomer
  • Isocaudomer
Recognition sequence 4bp
  • TaqI
  • Sau3A
  • AluI*
  • HaeIII*
  • DpnII
  • NlaIII
  • HpaII
Recognition sequence 5bp
  • EcoRII
  • FokI
Recognition sequence 6bp
  • AaaI
  • BglII
  • PovII*
  • EcoRV*
  • EcoRI
  • BamHI
  • HindIII
  • XbaI
  • XhoI
  • SacI
  • PstI
  • NdeI
Recognition sequence 8bp
  • NotI
Lists
  • A
  • Ba–Bc
  • Bd–Bp
  • Bsa–Bso
  • Bsp–Bss
  • Bst–Bv
  • C-D
  • E-F
  • G-K
  • L-N
  • O-R
  • S
  • T-Z
* means cleavage produces blunt ends


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