Polymerase

The polymerases (name drawn from Polymère ) (EC. 2.7.7.6 /7/19/48/49) are Enzyme S which have as a role the Copie of an element, for example at the time of Mitose S (cellular divisions ).

  • the polymerases synthesize the new bit in direction 5' towards 3'.
  • This synthesis is carried out in a complementary and antiparallel way.
  • It requires the incorporation of nucleosides triphosphates (NTPs) or désoxynucléosides triphosphates (dNTPs).

Principal polymerases

  • DNA dependant polymerase DNA ensures the maintenance of genetic information, in " recopiant" the molecule of DNA stamps in a news, identical (or almost because of the errors of replication) which could be transmitted to the cell girl.
  • ARN dependant polymerase DNA, synthesizes a molecule of ARN starting from the molecule stamps DNA.
  • ARN polymerase dependant ARN synthesizes a molecule of ARN starting from an other molecule of ARN (useful for the viruses for ARN).
  • the Transcriptase reverses (or rétrotranscriptase) is a DNA polymerase dependant ARN: it synthesizes a molecule of DNA starting from a molecule stamps ARN (useful also for the viruses for ARN).

Category: EC. 2.7.7

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