Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.1.25.1 (deoxyribonuclease)
 1,471 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The survival of Staphylococcus aureus was studied in 30 oral administration liquid medicaments (15 syrups and 15 solutions) to determine the effectiveness of the preservatives, the influence of the culture medium used in the enumeration of the surviving microorganisms, and the loss of the enzyme coagulase, phosphatase, DNase (deoxyribonuclease), and thermonuclease. Samples were inoculated with 6.3-6.5 x 10(5) viable cells per milliliter and were stored at room temperature for 60 days. Aliquots were taken for analysis at 0, 15, 22, 30, and 60 days after samples were inoculated. The enumeration of S. aureus was made by most probable number method (MPN) with six liquid culture media: triptone soy (TS), TS with 10% NaCl (TSS), TS and TSS with 0.2% catalase, Mannitol salt, and Tellurite-mannitol-glycine. The survival of S. aureus was lower in solutions than in syrups, decreased with the storage time, and depended on the culture medium utilized in the enumeration. Nonselective media were more sensitive than selective ones; that is, a better percentage of recovery was achieved with TS and the catalase medium. The preservative was effective in 93.3% of the samples. Coagulase was the most stable enzyme and phosphatase, DNase, and thermonuclease disappeared during the storage period.
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PMID:Survival of Staphylococcus aureus in oral administration liquid medicaments and influence of count medium on survival. 844 30

The pathogenesis of Streptococcus pyogenes infection, especially toxic shock-like syndrome (TSLS), is still not fully understood; however, the exoproteins have been considered to play a role. We analyzed the culture supernatant proteins (exoproteins) from a TSLS-related isolate belonging to M3 serotype S. pyogenes by two-dimensional gel electrophoresis and characterized a single protein spot by using BLAST database. We cloned the gene of this protein and named it sd alpha, which was similar to the deoxyribonuclease (DNase) sdc of S. equisimilis. We showed that the recombinant protein from the sd alpha gene had DNase activity. By polymerase chain reaction, we found that the sd alpha gene was present in most clinically isolated S. pyogenes including TSLS-related isolates. We thus conclude that Sd alpha is a new DNase of S. pyogenes.
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PMID:Cloning and characterization of the deoxyribonuclease sd alpha gene from Streptococcus pyogenes. 1202 21

Streptococcus pyogenes is an important bacterial pathogen that colonizes the throat and skin of human beings and causes a wide variety of diseases ranging from mild infections like pharyngitis, tonsillitis and impetigo to severe invasive infections such streptococcal toxic shock syndrome, septicemia, and necrotizing fasciitis, and produces a wide variety of virulence factors. The aim of this study was to investigate the antibiotic resistance, virulence genes; [pyrogenic exotoxin genes (speA, C, G, H, I, J, K, L, M, smeZ and ssa), deoxyribonuclease genes (sdaB, spd3, sdc ve sdaD), protease genes (speB, spyCEP ve scpA) and inhibitor genes (mac and sic)] of S.pyogenes strains isolated from throat cultures of patients with symptomatic tonsillo-pharyngitis and typing by multiple locus variable number tandem repeat fingerprinting (MLVF) method. One hundred and fifty S.pyogenes isolates were identified by conventional methods and streptococcus group A latex kit (Biomerieux, France). Antibiotic susceptibility tests were performed by Kirby-Bauer disk diffusion method as recommended by Clinical and Laboratory Standards Institute. DNA isolation was performed by using a commercial DNA isolation kit (Qiagen, Germany) in accordance with manufacturer's recommendations. The virulence genes were determined by multiplex PCR. MLVF method was performed with multiplex PCR using specific primers for repeated sequences within bacterial genome. All of the S.pyogenes isolates were susceptible to penicillin G, cefotaxime, ceftriaxone, chloramphenicol, clindamycin, erythromycin, levofloxacin, vancomycin and linezolid. Among streptococcal pyrogenic exotoxin genes the most frequent gene was smeZ (90.0%) followed by speG (88.0%), speC (58.7%), ssa (42.7%), speA (33.3%), speJ (24.0%), speK (18.7%), speH (14.0%), speI (13.3%), speL and speM (9.3%). Of the DNase genes, sdaB was detected in all strains (100%), spd3, sdc, sdaD genes were determined as 64.7%, 36.0%, 24.7% respectively. Protease genes (speB, spyCEP, scpA) and mac gene from the inhibitor genes were positive in all strains, and sic gene was positive in only 3 (2.0%) of the isolates. Thirty-two different patterns that contained two or more isolates were determined by MLVF analysis. Ninety one isolates were included in any of the 32 different patterns, while 59 isolates were defined as sporadic isolates. In conclusion, S.pyogenes isolates collected from throat cultures of patients with symptomatic tonsillo-pharyngitis in Konya/Turkey were susceptible to all antibiotics studied and have carried a very high rate of virulence factors. However the isolates were mostly clonally unrelated and sporadic. This study is the first report in Turkey, in which S.pyogenes isolates were typed by the MLVF method and a large number of virulence factors were investigated.
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PMID:[Investigation of Streptococcus pyogenes virulence factors and typing by multiple locus variable number tandem repeat fingerprinting (MLVF) method]. 3015 10