Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorINGLIS, P. W.
dc.contributor.authorRIGDEN, D. J.
dc.contributor.authorMELLO, L. V.
dc.contributor.authorLOUIS, E. J.
dc.contributor.authorVALADARES-INGLIS, M. C.
dc.identifier.citationMolecular Genetics and Genomics, v. 274, p. 79-90, 2005.
dc.descriptionIn most filamentous fungi, telomere-associated sequences (TASs) are polymorphic, and the presence of restriction fragment length polymorphisms (RFLPs) may permit the number of chromosome ends to be estimated from the number of telomeric bands obtained by restriction digestion. Here, we describe strains of Metarhizium, Gliocladium and Paecilomyces species in which only one or a few telomeric bands of unequal intensity are detectable by Southern hybridization, indicating that interchromosomal TAS exchange occurs. We also studied an anomalous strain of Metarhizium anisopliae, which produces polymorphic telomeric bands larger than 8 kb upon digestion of genomic DNA with XhoI. In this case, the first XhoI site in from the chromosome end must lie beyond the presumed monomorphic region. Cloned telomeres from this strain comprise 18?26 TTAGGG repeats, followed at the internal end of the telomere tract by five repeats of the telomere-like sequence TAAACGCTGG. An 8.1-kb TAS clone also contains a gene for a RecQ-like helicase, designated TAH1, suggesting that this TAS is analogous to the Y elements in yeast and the subtelomeric helicase ORFs of Ustilago maydis (UTASRecQ) and Magnaporthe grisea (TLH1). The TAS in the anomalous strain of M. anisopliae, however, appears distinct from these in that it is found at most telomeres and its predicted protein product possesses a significantly longer N-terminal region in comparison to the M. grisea and U. maydis helicases. Hybridization analyses showed that TAH1 homologues are present in all other anomalous M. anisopliae strains studied, as well as in some other polymorphic strains, where the recQ-like gene also appears to be telomere-associated.
dc.subjectRecQ helicase
dc.subjectTelomere associated sequence
dc.titleMonomorphic subtelomeric DNA in the filamentous fungus, Metarhizium anisopliae, contains a RecQ helicase-like gene.
dc.typeArtigo de periódico
dc.subject.thesagroMetarhizium Anisopliae
dc.description.notesPublished online: 2 June 2005.
Appears in Collections:Artigo em periódico indexado (CENARGEN)

Files in This Item:
File Description SizeFormat 
ID253071.pdf792,52 kBAdobe PDFThumbnail

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace