Ribonucleotide Reductase Modularity

Ribonucleotide reductase modularity: Atypical duplication of the ATP-cone domain in Pseudomonas aeruginosa.

The opportunistic pathogen Pseudomonas aeruginosa, which causes serious nosocomial infections, is a gamma-proteobacterium that can live in many different environments. Interestingly P. aeruginosa encodes three ribonucleotide reductases (RNRs) that all differ from other well known RNRs. The RNR enzymes are central for de novo synthesis of deoxyribonucleotides and essential to all living cells. T...

Ribonucleotide reductase in developing brain.

Ribonucleotide Reductase Inhibitors for Restenosis

Percutaneous transluminal coronary angioplasty (PTCA) has greatly benefited patients with occluded coronary arteries, but its benefits have been undermined by a high incidence of restenosis. The introduction of coronary stents has significantly improved the short and long term outcome but restenosis still occurs in approximately 15-30 % of patients within 6 months. Research efforts are now bein...

Herpes Simplex Type 1 Ribonucleotide Reductase

Several known inhibitors of mammalian ribonucleotide reductase were studied for their interactions with herpes simplex virus type 1 (HSV-1) ribonucleotide reductase. MAIQ (4-methyl-5-amino-l-formylisoquinoline thiosemicarbazone) produced apparent inactivation of HSV-1 ribonucleotide reductase. Only catalytically cycling, not resting, enzyme could be inactivated. Double reciprocal replots of the...

Ribonucleotide reductase inhibitors and future drug design.

Ribonucleotide reductase (RR) is a multisubunit enzyme responsible for the reduction of ribonucleotides to their corresponding deoxyribonucleotides, which are building blocks for DNA replication and repair. The key role of RR in DNA synthesis and cell growth control has made it an important target for anticancer therapy. Increased RR activity has been associated with malignant transformation an...