| PNK | polynucleotide kinase; pyridoxine kinase |
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| PNPase | polynucleotide phosphorylase |
| PNPase | Polynucleotide phosphorylase |
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| PNK | polynucleotide kinase |
| polynucleotide methylases | Enzymes that catalyze the methylation of purine and/or pyrimidine bases of polynucleotides, or of the sugars of polynucleotides. Synonym: polynucleotide methylases. (05 Mar 2000) |
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| DNA modification methylases | <enzyme> Enzymes that are part of the restriction-modification systems. They are responsible for producing a species-characteristic methylation pattern, on either adenine or cytosine residues, in a specific short base sequence in the host cell's own DNA. This methylated sequence will occur many times in the hosT-cell DNA and remain intact for the lifetime of the cell. Any DNA from another species which gains entry into a living cell and lacks the characteristic methylation pattern will be recognised by the restriction endonucleases of similar specificity and destroyed by cleavage. most have been studied in bacterial systems, but a few have been found in eukaryotic organisms. Registry number: EC 2.1.1.- (12 Dec 1998) |
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| polynucleotide | <molecular biology> Linear sequences of nucleotides, in which the 5' linked phosphate on one sugar group is covalently linked to the 3' position on the adjacent sugars. In the polynucleotide DNA the sugar is deoxyribose and in RNA, ribose. They may be double stranded or single stranded with varying amounts of internal folding. (14 Oct 1997) |
| polynucleotide 5'-hydroxyl-kinase | <enzyme> An enzyme that catalyses the transfer of a phosphate group to the 5'-terminal hydroxyl groups of DNA and RNA. Chemical name: ATP:5'-dephosphopolynucleotide 5'-phosphotransferase Registry number: EC 2.7.1.78 (12 Dec 1998) |
| polynucleotide 5'-phosphatase | <enzyme> Chemical name: 5'-polynucleotidase Registry number: EC 3.1.3.33 (26 Jun 1999) |
| polynucleotide adenylyltransferase | <enzyme> An enzyme that catalyses the synthesis of polyadenylic acid from ATP. May be due to the action of RNA polymerase (ec 2.7.7.6) or polynucleotide adenylyltransferase (ec 2.7.7.19). Chemical name: ATP:polynucleotide adenylyltransferase Registry number: EC 2.7.7.19 (12 Dec 1998) |
| polynucleotide ligases | <enzyme> Catalyze the joining of preformed ribonucleotides or deoxyribonucleotides in phosphodiester linkage during genetic processes. Registry number: EC 6.5.1. (12 Dec 1998) |
| polynucleotide methyltransferases | Enzymes that catalyze the methylation of purine and/or pyrimidine bases of polynucleotides, or of the sugars of polynucleotides. Synonym: polynucleotide methylases. (05 Mar 2000) |
| polynucleotide phosphorylase | <enzyme> An enzyme of the transferase class that catalyses the reaction RNA(n+1) and orthophosphate to yield RNA(n) and a nucleoside diphosphate, or the reverse reaction. ADP, idp, GDP, udp, and cdp can act as donors in the latter case. Chemical name: Polyribonucleotide:orthophosphate nucleotidyltransferase Registry number: EC 2.7.7.8 (12 Dec 1998) |
| polynucleotide thioltransferases | Enzymes that catalyze specific thiolation reaction of purine and/or pyrimidine bases in polynucleotides. (05 Mar 2000) |
| 100RNP-polynucleotide phosphorylase | <enzyme> A chloroplast exoribonuclease that degrades polyadenylated RNA much faster than non-polyadenylated RNA Registry number: EC 3.1.13.- Synonym: 100rnp-pnpase (26 Jun 1999) |
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