RenardV1, Main, Exploration, bibRecord, 000D17

Polymorphism of the gene encoding a major polar tube protein PTP1 in two microsporidia of the genus Encephalitozoon.

Identifieur interne : 000D17 ( Main/Exploration ); précédent : 000D16; suivant : 000D18

Polymorphism of the gene encoding a major polar tube protein PTP1 in two microsporidia of the genus Encephalitozoon.

Auteurs : I. Peuvel [France] ; F. Delbac ; G. Metenier ; P. Peyret ; C P Vivares

Source :

Parasitology [ 0031-1820 ] ; 2000.

RBID : pubmed:11155928

English descriptors

KwdEn :
- Amino Acid Sequence, Animals, Base Sequence, DNA, Protozoan (chemistry), Dogs, Encephalitozoon (genetics), Foxes, Fungal Proteins, Humans, Karyotyping, Mice, Molecular Sequence Data, Polymerase Chain Reaction (veterinary), Polymorphism, Genetic, Protozoan Proteins (chemistry), Protozoan Proteins (genetics), Rabbits, Sequence Analysis, DNA.
MESH :
- chemical , chemistry : DNA, Protozoan, Protozoan Proteins.
- genetics : Encephalitozoon, Protozoan Proteins.
- veterinary : Polymerase Chain Reaction.
- Amino Acid Sequence, Animals, Base Sequence, Dogs, Foxes, Fungal Proteins, Humans, Karyotyping, Mice, Molecular Sequence Data, Polymorphism, Genetic, Rabbits, Sequence Analysis, DNA.

Abstract

Isolates of 2 microsporidian species from the genus Encephalitozoon (E. cuniculi and E. hellem) were compared by analysis of DNA amplified from a gene region encoding the repeat domain of a polar tube protein (PTP1). Sequence data obtained for 11 E. cuniculi isolates from 5 different mammalian hosts well support the existence of 3 previously designated strains. Strain type III was characterized by a lack of a 78 bp repeat, producing an amplicon of reduced size. Strain type II differed from strain type I by 3 nucleotide substitutions so that AvalI digestion of the corresponding PCR products provided distinct restriction patterns. Surprisingly, the comparison of 2 human isolates of E. hellem belonging to the same rDNA ITS genotype shows a high level of heterogeneity through numerous point mutations and variation in PTP1 repeat number. Further characterization of additional E. hellem isolates based on PTP1 sequence polymorphisms should be of interest for tracing sources of infection.

PubMed: 11155928

Affiliations:

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<front><div type="abstract" xml:lang="en">Isolates of 2 microsporidian species from the genus Encephalitozoon (E. cuniculi and E. hellem) were compared by analysis of DNA amplified from a gene region encoding the repeat domain of a polar tube protein (PTP1). Sequence data obtained for 11 E. cuniculi isolates from 5 different mammalian hosts well support the existence of 3 previously designated strains. Strain type III was characterized by a lack of a 78 bp repeat, producing an amplicon of reduced size. Strain type II differed from strain type I by 3 nucleotide substitutions so that AvalI digestion of the corresponding PCR products provided distinct restriction patterns. Surprisingly, the comparison of 2 human isolates of E. hellem belonging to the same rDNA ITS genotype shows a high level of heterogeneity through numerous point mutations and variation in PTP1 repeat number. Further characterization of additional E. hellem isolates based on PTP1 sequence polymorphisms should be of interest for tracing sources of infection.</div>
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Polymorphism of the gene encoding a major polar tube protein PTP1 in two microsporidia of the genus Encephalitozoon.

Polymorphism of the gene encoding a major polar tube protein PTP1 in two microsporidia of the genus Encephalitozoon.

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

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