The putative Drosophila transcription factor woc is required to prevent telomeric fusions.
Woc is a Drosophila zinc finger protein that shares homology with the human polypeptides ZNF261 and ZNF198 implicated in mental retardation and leukemia syndromes. We show that mutations in the woc gene cause frequent telomeric fusions in Drosophila brain cells. Woc localizes to all telomeres and most interbands of polytene chromosomes. In interbands, Woc precisely colocalizes with the initiating forms of RNA polymerase II (Pol II). To characterize the role of woc in telomere maintenance, we analyzed its relationships with Su(var)205, cav, atm, and rad50, four genes that prevent telomeric fusions; Su(var)205 and cav encode HP1 and HP1/ORC Associated Protein (HOAP), respectively. woc mutants displayed normal telomeric accumulations of both HP1 and HOAP, and mutations in cav, Su(var)205, atm, and rad50 did not affect Woc localization on polytene chromosome telomeres. Collectively, our results indicate that Woc is a transcription factor with a telomere-capping function independent of those of Su(var)205, cav, atm, and rad50.
Raffa
Grazia D
GD
Istituto Pasteur-Fondazione Cenci Bolognetti and Istituto di Biologia e Patologia Molecolari del CNR, Dipartimento di Genetica e Biologia Molecolare, Università di Roma La Sapienza, Roma, Italy.
Cenci
Giovanni
G
Siriaco
Giorgia
G
Goldberg
Michael L
ML
Gatti
Maurizio
M
D000818:Animals; D001921:Brain / Q000166:cytology / Q000378:metabolism; D000090266:Chromobox Protein Homolog 5; D002875:Chromosomes / Q000378:metabolism; D000072481:DNA Ligase ATP; D011088:DNA Ligases / Q000378:metabolism; D004268:DNA-Binding Proteins; D029721:Drosophila Proteins / Q000235:genetics / Q000378:metabolism*; D004331:Drosophila melanogaster / Q000235:genetics / Q000378:metabolism*; D005260:Female; D050939:Gene Fusion; D018869:Heat-Shock Response; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D017354:Point Mutation; D012319:RNA Polymerase II / Q000378:metabolism; D016615:Telomere / Q000235:genetics / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D016335:Zinc Fingers
D004268:DNA-Binding Proteins; D029721:Drosophila Proteins; C000716867:Su(var)205 protein, Drosophila; D014157:Transcription Factors; C414987:WOC protein, Drosophila; D000090266:Chromobox Protein Homolog 5; D012319:RNA Polymerase II; D011088:DNA Ligases; D000072481:DNA Ligase ATP