Chromatin features of plant telomeric sequences at terminal vs. internal positions

@article{1227544,
   author = {Majerová, Eva and Mandáková, Terezie and Vu, GTH and Fajkus, Jiří and Lysák, Martin and Fojtová, Miloslava},
   article_location = {LAUSANNE},
   article_number = {November},
   doi = {http://dx.doi.org/10.3389/fpls.2014.00593},
   keywords = {telomere; chromatin; epigenetics; Nicotiana tabacum; Ballantinia antipoda; histone modifications; DNA methylation},
   language = {eng},
   issn = {1664-462X},
   journal = {Frontiers in Plant Science},
   title = {Chromatin features of plant telomeric sequences at terminal vs. internal positions},
   url = {http://journal.frontiersin.org/article/10.3389/fpls.2014.00593/full},
   volume = {5},
   year = {2014}
}

TY  - JOUR
ID  - 1227544
AU  - Majerová, Eva - Mandáková, Terezie - Vu, GTH - Fajkus, Jiří - Lysák, Martin - Fojtová, Miloslava
PY  - 2014
TI  - Chromatin features of plant telomeric sequences at terminal vs. internal positions
JF  - Frontiers in Plant Science
VL  - 5
IS  - November
SP  - "nestránkováno"
EP  - "nestránkováno"
PB  - Frontiers Research Foundation
SN  - 1664462X
KW  - telomere
KW  - chromatin
KW  - epigenetics
KW  - Nicotiana tabacum
KW  - Ballantinia antipoda
KW  - histone modifications
KW  - DNA methylation
UR  - http://journal.frontiersin.org/article/10.3389/fpls.2014.00593/full
L2  - http://journal.frontiersin.org/article/10.3389/fpls.2014.00593/full
N2  - Epigenetic mechanisms are involved in regulation of crucial cellular processes in eukaryotic organisms. Data on the epigenetic features of plant telomeres and their epigenetic regulation were published mostly for Arabidopsis thaliana, in which the presence of interstitial telomeric repeats (ITRs) may interfere with genuine telomeres in most analyses. Here, we studied the epigenetic landscape and transcription of telomeres and ITRs in Nicotiana tabacum with long telomeres and no detectable ITRs, and in Ballantinia antipoda with large blocks of pericentromeric ITRs and relatively short telomeres. Chromatin of genuine telomeres displayed heterochromatic as well as euchromatic marks, while ITRs were just heterochromatic. Methylated cytosines were present at telomeres and ITRs, but showed a bias with more methylation toward distal telomere positions and different blocks of B. antipoda ITRs methylated to different levels. Telomeric transcripts TERRA (G-rich) and ARRET (C-rich) were identified in both plants and their levels varied among tissues with a maximum in blossoms. Plants with substantially different proportions of internally and terminally located telomeric repeats are instrumental in clarifying the chromatin status of telomeric repeats at distinct chromosome locations.
ER  - 

MAJEROVÁ, Eva, Terezie MANDÁKOVÁ, GTH VU, Jiří FAJKUS, Martin LYSÁK a Miloslava FOJTOVÁ. Chromatin features of plant telomeric sequences at terminal vs. internal positions. \textit{Frontiers in Plant Science}. LAUSANNE: Frontiers Research Foundation, 2014, roč.~5, November, s.~''nestránkováno'', 10 s. ISSN~1664-462X. Dostupné z: https://dx.doi.org/10.3389/fpls.2014.00593.