Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.1.4.1 (phosphodiesterase)
 18,767 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

3'-Fluoro-2',3'-dideoxythymidine 5'-(alpha-methylphosphonyl)-beta,gamma- diphosphate and 2'-deoxythymidine-5'-(alpha-methylphosphonyl)-beta, gamma- diphosphate have been synthesized. Both compounds are incorporated into DNA chains during catalysis by reverse transcriptases of human immunodeficiency (HIV) and avian myeloblastosis (AMV) viruses, DNA polymerase beta from rat liver, terminal deoxynucleotidyl transferase from calf thymus and (at a very low rate) is by E. coli DNA polymerase I, Klenow fragment. The first compound is a termination substrate while the second is capable of multiple incorporation into the DNA chains. For instance, reverse transcriptase catalysis resulted in the appearance of 8 residues of second compound. DNA polymerases alpha and epsilon from human placenta incorporated none of the above compounds into DNA chains, although an inhibition of DNA synthesis by both compounds was observed with all enzymes mentioned. The 3'----5'-exonuclease activity of DNA polymerase I, Klenow fragment, hydrolyzed DNA fragments containing phosphonomethyl internucleoside groups, while such DNA fragments were resistant to the E. coli exonuclease III.
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PMID:Formation of phosphonester bonds catalyzed by DNA polymerase. 137 65

cDNA was synthesized on Ig kappa-L-chain mRNA isolated from mouse plasmocytoma MOPC 21 using avial myeloblastosis RNA-dependent DNA polymerase. The cDNA was used as a matrix for second DNA chain synthesis using 5'-exonuclease free DNA-polymerase I (Klenoff fragment). Hairpin DNA having double length of initial cDNA was obtained without added exogenous primer. SI nuclease treatment of the hairpin DNA results in reducing the DNA length twice, as shown by electrophoresis in denaturing conditions. The fact, that S1 nuclease resistance of the hairpin DNA is 75% shows high complementarity between first and second DNA chain. The product length obtained after S1 nuclease treatment was shown to be heterogenous. The maximal length of the product, reaching at least 900 base pairs, is near to be initial mRNA length (without the poly(A)-fragment).
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PMID:[Synthesis of double-stranded DNA on light immunoglobulin chain matrix RNA]. 615 6