Maintenance of heterochromatin by RNA interference of tandem repeats.
Tandem repeats are prone to epigenetic silencing regulated by RNA interference. This may be because siRNAs from tandem array transcripts are regenerated by RNA-dependent RNA polymerase (RdRP) and Dicer, but siRNAs from single-copy sequences are exhausted by sequential use of downstream primers by RdRP. This could account for the formation of heterochromatin from tandem repeats.
Martienssen
Robert A
RA
Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA. martiens@cshl.org
D006570:Heterochromatin / Q000235:genetics*; D034622:RNA Interference; D020080:Tandem Repeat Sequences
D006570:Heterochromatin