Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.1.30.2 (endonuclease)
 18,621 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A method based upon the polymerase chain reaction (PCR) for detecting genes encoding the Fc receptors of Staphylococcus aureus and streptococci is described. Primers were designed from the nucleotide sequences of the five Fc receptor genes encoding protein A, protein G, protein H, FcRA and protein V. Amplification products corresponding in size to the protein A and protein G genes were detected in S. aureus strain Cowan 1 and Streptococcus pyogenes strain G148, respectively, as expected. Str. pyogenes strain AR1 was shown to possess the type H receptor gene. Two clinical isolates of Str. pyogenes, strains IP-28 and ES-21L, were shown to possess genes for Fc receptor types FcRA and protein G, respectively. The identification of all these products was confirmed by restriction endonuclease analysis. Amplification of protein H genes from two other clinical isolates of streptococci, MS-4 and MS-38, yielded a product larger than expected and with a different restriction fragment pattern to strain AR1, indicating a new type of Fc receptor gene. This PCR method provides a DNA-based method for the determination of Fc receptor type in S. aureus and streptococci.
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PMID:Detection of Fc receptor genes from Staphylococcus aureus and streptococci by polymerase chain reaction. 895 59

Two coliphages, AR1 and LG1, were characterized based on their morphological, host range, and genetic properties. Transmission electron microscopy showed that both phages belonged to the Myoviridae; phage particles of LG1 were smaller than those of AR1 and had an isometric head 68 nm in diameter and a complex contractile tail 111 nm in length. Transmission electron micrographs of AR1 showed phage particles consisting of an elongated isometric head of 103 by 74 nm and a complex contractile tail 116 nm in length. Both phages were extensively tested on many strains of Escherichia coli and other enterobacteria. The results showed that both phages could infect many serotypes of E. coli. Among the enterobacteria, Proteus mirabilis, Shigella dysenteriae, and two Salmonella strains were lysed by the phages. The genetic material of AR1 and LG1 was characterized. Phage LG1 had a genome size of 49.5 kb compared to 150 kb for AR1. Restriction endonuclease analysis showed that several restriction enzymes could degrade DNA from both phages. The morphological, genome size, and restriction endonuclease similarities between AR1 and phage T4 were striking. Southern hybridizations showed that AR1 and T4 are genetically related. The wide host ranges of phages AR1 and LG1 suggest that they may be useful as biocontrol, therapeutic, or diagnostic agents to control and detect the prevalence of E. coli in animals and food.
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PMID:Morphological, host range, and genetic characterization of two coliphages. 1295 24

New specific primers AR1 and AR2 were successfully used for the amplification of a specific part of internal transcribed spacer (ITS) of rDNA of Armillaria isolated from soil samples. DNA was isolated from 0.5 g of forest soil and ITS region was amplified by nested PCR reaction with external primers ITS1 and ITS4 and internal primers AR1 and AR2. The individual species were distinguished by restriction fragment length polymorphisms (RFLPs) analysis with restriction endonuclease HinfI. The fragments were analysed by ion-exchange HPLC that is more sensible and more rapid than electrophoresis. The amplicons were sequenced to improve the discrimination between the species. The method enables the identification of Armillaria species within one day directly from soil samples without the need for previous isolation and cultivation of mycelium of Armillaria.
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PMID:The rapid identification of European Armillaria species from soil samples by nested PCR. 1526 44