Middle June 2009 papers

I am slow again. It is the end of financial year and we are promoting Australian economy recently.

Extensive Demethylation of Repetitive Elements During Seed Development Underlies Gene Imprinting, M. Gehring et al., Science 324(5933):1447 - 1451.
Gene function in Arabidopsis endosperm depends on whether a gene is maternally or paternally inherited.

Genome-Wide Demethylation of Arabidopsis Endosperm, T.-F. Hsieh et al., Science 324(5933):1451 - 1454.
The endosperm genome of Arabidopsis shows extensive gene imprinting.

Shining light on a new class of hydrogels, Steven M Jay and W Mark Saltzman, Nature Biotechnology 27, 543 - 544 (2009).
Addition of a photodegradable group to the backbone of synthetic hydrogels enables real-time control of the material's chemical and physical properties.

Inaugural Article: Specific Arabidopsis HSP90.2 alleles recapitulate RAR1 cochaperone function in plant NB-LRR disease resistance protein regulation, David A. Hubert, Yijian He, Brian C. McNulty, Pablo Tornero, and Jeffery L. Dangl, PNAS 106(24):9556-9563.

Research Highlight: Plant genetics: Asexual Arabidopsis, Nature 459:892.
Turning Meiosis into Mitosis, PLoS Biol. 7(6):e1000124 (2009)

EVOLUTION: Uniting Alignments and Trees, Ari Löytynoja and Nick Goldman, Science 324(5934):1528 - 1529.
An iterative method that estimates both sequence alignments and phylogenies leads to improved phylogenetic trees for large data sets.

Rapid and Accurate Large-Scale Coestimation of Sequence Alignments and Phylogenetic Trees, Kevin Liu, Sindhu Raghavan, Serita Nelesen, C. Randal Linder, and Tandy Warnow, Science 324 (5934):1561.
A step-wise algorithm iteratively wraps sequence alignment around a phylogenetic tree to reduce bias caused by errors.

Plant PcG conservation identiFIEd, Development 136:e1403

Regulation of stem cell maintenance by the Polycomb protein FIE has been conserved during land plant evolution, Assaf Mosquna, Aviva Katz, Eva L. Decker, Stefan A. Rensing, Ralf Reski, and Nir Ohad, Development 136:2433-2444.