Alexandra Kühnlein, Simon A Lanzmich, Dieter Braun
Rudimentary cross-catalytic replication can be established by double-hairpins of tRNA-like sequences, implying that replication and translation could have emerged along a common evolutionary trajectory.
A three-dimensional investigation of extinct-tetrapod limbs shows that even though bone elongation and blood-cell production are intimately related to mammal long bones, these functions actually appeared successively in tetrapod evolution.
β-Catenin-mediated expansion of nephron progenitors is independent of direct β-catenin/chromatin engagement, while progenitor induction proceeds with a β-catenin-driven switch of repressive TCFL1/TCFL2 to activating TCF7/LEF1 factors on transcriptionally poised enhancers.
Mutations that affect a metabolic network generically exhibit epistasis, which propagates to higher level phenotypes, such as fitness, carrying some information about the network’s topology.
Upon DNA damage, Rad52 forms a membraneless sub-compartment where Rad52 molecules are highly dynamic and share properties with liquid-liquid phase-separated molecules, reflecting the existence of a liquid droplet around damaged DNA.
Diana Rodrigues, Yoan Renaud ... Maneesha S Inamdar
Comprehensive developmental in situ analysis of the Drosophila lymph gland provides markers highlighting blood progenitor diversity and reveals that JAK-STAT signaling prevents posterior progenitor differentiation, promoting survival after immune challenge.
Michael Borg, Ranjith K Papareddy ... Frédéric Berger
Epigenetic reprogramming of the distinct repressive marks H3K27me3 or H3K9me2 guides the transition between the haploid and diploid life forms that encompass the life cycle of land plants.
Aleksandra Z Płochocka, Miguel Ramirez Moreno ... Lyubov Chumakova
Computational, theoretical, and in vivo studies reveal that in epithelia the self-organization of apical microtubules is robustly determined by cell geometry and minus-end distribution, not organism environment or genetics.
