The complete sequence of a heterochromatic island from a higher eukaryote

W. Richard McCombie, Melissa De la Bastide, Kristina Habermann, Laurence Parnell, Neilay Dedhia, Lidia Gnoj, Kristin Schutz, Emily Huang, Lori Spiegel, Cristy Yordan, Mundeep Sehkon, Jennifer Murray, Paul Sheet, Matt Cordes, Jane Threideh, Tamberlyn Stoneking, Joelle Kalicki, Tina Graves, Gwen Harmon, Jennifer EdwardsPhil Latreille, Laura Courtney, James Cloud, Amanda Abbott, Kelsi Scott, Doug Johnson, Pat Minx, Dan Bentley, Bob Fulton, Nancy Miller, Tracie Greco, Kim Kemp, Jason Kramer, Lucinda Fulton, Elaine Mardis, Mike Dante, Kym Pepin, La Deana Hillier, Joanne Nelson, John Spieth, Joe Simorowski, Bruce May, Peter Ma, Ray Preston, Daniel Vil, Hoon See Lei, Monica Shekher, Anthony Matero, Ravi Shah, I'Kyori Swaby, Andrew O'Shaughnessy, Milka Rodriguez, Jane Hoffman, Sally Till, Susan Granat, Nadim Shohdy, Amy Hasegawa, Aliyah Hameed, Mohammad Lodhi, Arthur Johnson, Ellson Chen, Marco Marra, Richard K. Wilson, Robert Martienssen

Research output: Contribution to journalArticlepeer-review

114 Scopus citations

Abstract

Heterochromatin, constitutively condensed chromosomal material, is widespread among eukaryotes but incompletely characterized at the nucleotide level. We have sequenced and analyzed 2.1 megabases (Mb) of Arabidopsis thaliana chromosome 4 that includes 0.5-0.7 Mb of isolated heterochromatin that resembles the chromosomal knobs described by Barbara McClintock in maize. This isolated region has a low density of expressed genes, low levels of recombination and a low incidence of genetrap insertion. Satellite repeats were absent, but tandem arrays of long repeats and many transposons were found. Methylation of these sequences was dependent on chromatin remodeling. Clustered repeats were associated with condensed chromosomal domains elsewhere. The complete sequence of a heterochromatic island provides an opportunity to study sequence determinants of chromosome condensation.

Original languageEnglish
Pages (from-to)377-386
Number of pages10
JournalCell
Volume100
Issue number3
DOIs
StatePublished - Feb 4 2000

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