TABLE 1

Summary of radiation sensitivity and homologous recombination in RNAi lines or mutants of 14 SWI2/SNF2 genes

Observed functionc
GeneCHRaHomologbPredicted functionγ-IRUV-CICR Rate
At3g19210CHR25RAD54DNA repair and homologous recombinationSSWT
At2g18760CHR8ERCC6/RAD26Excision repair and/or transcription-repair couplingWTSWT
At1g08600CHR20ATRXTranscriptional regulatorSSWT
At2g25170CHR6PICKLE/GYMNOSRegulation of multiple gene familiesSSWT
At2g13370CHR5NDUnknownWTSWT
At5g63950CHR24ERCC6/RAD26Excision repair and/or transcription-repair couplingSSND
At5g44800CHR4hMi-2-LIKEHuman mi-2 autoantigen-like for dermatomyositisSRReduced
At5g66750CHR1DDM1Maintenance of DNA methylation 1SSWT
At2g46020CHR2AtBRMControls shoot and flower developmentSNDReduced
At2g02090CHR19ETL1Transcriptional regulation and DNA repairWTWTWT
At1g05490CHR31NDUnknownWTRWT
At1g03750CHR9NDUnknownSWTWT
At3g24340CHR40NDUnknownWTWTWT
At3g12810CHR13PIE1/SRCAPRequired for FLC activation and floral repressionSRWT
  • a The CHR number corresponds to the chromatin remodeling gene number given in the Plant Chromatin Database (http://www.chromdb.org).

  • b The name of the homolog is given or of the gene itself (underlined) whenever it has been previously characterized.

  • c The response of the RNAi or both RNAi and mutant (in italics) plants to γ-irradiation (γ-IR) or UV-C (254 nm) is indicated as sensitive (S), resistant (R), similar to wild type (WT), or not determined (ND). The intrachromosomal recombination rate (ICR) is indicated as similar or reduced compared to WT. For GYMNOS, two mutant alleles and one RNAi line were tested and gave the same results. For At5g63950, only the mutant line was tested.