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At least 289 records · Page 16Linked to original sources
PubMed2004

Crystallization and preliminary X-ray diffraction studies of a fungal hydrolase from Ophiostoma novo-ulmi.

Dutch elm disease fungus Ophiostoma novo-ulmi contains a hydrolase activity which catalyses the resolution of racemic ethyl naproxen to the corresponding acid. The recombinant enzyme has been crystallized by the vapour-diffusion method in two crystal forms. The crystals of the first form belong to space group P2(1)2(1)2, with unit-cell parameters a = 115.9, b = 174.4, c = 62.1 A. The enzyme also crystallizes in space group P2(1)2(1)2, with unit-cell parameters a = 72.9, b = 212.7, c = 61.7 A. Synchrotron data have been collected for both crystal forms to 2.6 and 2.3 A, respectively. A molecular-replacement solution has been found using a remote starting model of a bacterial esterase (23% sequence identity) for both crystal forms. Multicrystal averaging has resulted in interpretable electron-density maps.

Ascomycota↗
PubMed2006

Selective acquisition of novel mating type and vegetative incompatibility genes via interspecies gene transfer in the globally invading eukaryote Ophiostoma novo-ulmi.

The Dutch elm disease fungus Ophiostoma novo-ulmi, which has destroyed billions of elm trees worldwide, originally invaded Europe as a series of clonal populations with a single mating type (MAT-2) and a single vegetative incompatibility (vic) type. The populations then rapidly became diverse with the appearance of the MAT-1 type and many vegetative incompatibility types. Here, we have investigated the mechanism using isolates from sites in Portugal at which the rapid evolution of O. novo-ulmi populations from clonality to heterogeneity was well established. We show by genetic mapping of vic and MAT loci with AFLP markers and by sequence analysis of MAT loci that this diversification was due to selective acquisition by O. novo-ulmi of the MAT-1 and vic loci from another species, Ophiostoma ulmi. A global survey showed that interspecies transfer of the MAT-1 locus occurred on many occasions as O. novo-ulmi spread across the world. We discuss the possibility that fixation of the MAT-1 and vic loci occurred in response to spread of deleterious viruses in the originally clonal populations. The process demonstrates the potential of interspecies gene transfer for facilitating rapid adaptation of invasive organisms to a new environment.

Ascomycota↗
PubMed1998

[Pulmonary complications occurring after allogeneic bone marrow transplantation].

OBJECTIVE: To explore the risk factors for and pathogenesis of pulmonary complications (PC) occurred after allogeneic bone marrow transplantation (allo-BMT). METHODS: The PC in 185 patients undergone allo-BMT were analyzed. RESULTS: Ninety-three PC episodes were observed in 89 patients and most of them were due to infections, including bacterial pneumonia (n = 27), interstitial pneumonia (n = 7), pulmonary fungus disease (n = 16), tuberculosis (n = 4), obstructive lung disease (n = 2), pulmonary edema (n = 2), lung abscess (n = 1) and 34 episodes caused by two or more pathogens. The overall mortality for PC was 12.43% (23/185). CONCLUSION: The risk factors for PC occurred after allo-BMT were not related to age and sex of recipients, bone marrow status before BMT, conditioning regimen and pulmonary function. Graft-versus-host-disease significantly increased the morbidity and mortality of PC after allo-BMT.

Acute Disease↗
PubMedDate not supplied

[Deep mycoses].

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Mycoses↗
PubMed1953

[Fungi in urine].

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Body Fluids↗