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838 Newest Publications in proceedings of the national academy of sciences current issue

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Conserved regulatory mechanism controls the development of cells with rooting functions in land plants [Plant Biology]

21-Jul-2015 | Thomas Ho Yuen Tam; Bruno Catarino; Liam Dolan, Proceedings of the National Academy of Sciences current issue, 2015

Land plants develop filamentous cells—root hairs, rhizoids, and caulonemata—at the interface with the soil. Members of the group XI basic helix–loop–helix (bHLH) transcription factors encoded by LOTUS JAPONICUS ROOTHAIRLESS1-LIKE (LRL) genes positively regulate the development of root hairs in ...

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Trp triad-dependent rapid photoreduction is not required for the function of Arabidopsis CRY1 [Plant Biology]

21-Jul-2015 | Jie Gao; Xu Wang; Meng Zhang; Mingdi Bian; Weixian Deng; Zecheng Zuo; Zhenming Yang; Dongping Zhong; Chentao Lin, Proceedings of the National Academy of Sciences current issue, 2015

Cryptochromes in different evolutionary lineages act as either photoreceptors or light-independent transcription repressors. The flavin cofactor of both types of cryptochromes can be photoreduced in vitro by electron transportation via three evolutionarily conserved tryptophan residues known as ...

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The EBF transcription factor Collier directly promotes Drosophila blood cell progenitor maintenance independently of the niche [Developmental Biology]

21-Jul-2015 | Billel Benmimoun; Cédric Polesello; Marc Haenlin; Lucas Waltzer, Proceedings of the National Academy of Sciences current issue, 2015

The maintenance of stem or progenitor cell fate relies on intrinsic factors as well as local cues from the cellular microenvironment and systemic signaling. In the lymph gland, an hematopoietic organ in Drosophila larva, a group of cells called the Posterior Signaling Centre (PSC), whose ...

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FUS functions in coupling transcription to splicing by mediating an interaction between RNAP II and U1 snRNP [Biochemistry]

14-Jul-2015 | Yong Yu; Robin Reed, Proceedings of the National Academy of Sciences current issue, 2015

Pre-mRNA splicing is coupled to transcription by RNA polymerase II (RNAP II). We previously showed that U1 small nuclear ribonucleoprotein (snRNP) associates with RNAP II, and both RNAP II and U1 snRNP are also the most abundant factors associated with the protein fused-in-sarcoma (FUS), which is ...

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Enhanced memory consolidation in mice lacking the circadian modulators Sharp1 and -2 caused by elevated Igf2 signaling in the cortex [Neuroscience]

07-Jul-2015 | Ali Shahmoradi; Konstantin Radyushkin; Moritz J. Rossner, Proceedings of the National Academy of Sciences current issue, 2015

The bHLH transcription factors SHARP1 and SHARP2 are partially redundant modulators of the circadian system. SHARP1/DEC2 has been shown to control sleep length in humans and sleep architecture is also altered in double mutant mice (S1/2−/−). Because of the importance of sleep for memory ...

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DNA damage during the G0/G1 phase triggers RNA-templated, Cockayne syndrome B-dependent homologous recombination [Cell Biology]

07-Jul-2015 | Leizhen Wei; Satoshi Nakajima; Stefanie Böhm; Kara A. Bernstein; Zhiyuan Shen; Michael Tsang; Arthur S. Levine; Li Lan, Proceedings of the National Academy of Sciences current issue, 2015

Damage repair mechanisms at transcriptionally active sites during the G0/G1 phase are largely unknown. To elucidate these mechanisms, we introduced genome site-specific oxidative DNA damage and determined the role of transcription in repair factor assembly. We find that KU and NBS1 are recruited ...

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BEND3 represses rDNA transcription by stabilizing a NoRC component via USP21 deubiquitinase [Cell Biology]

07-Jul-2015 | Abid Khan; Sumanprava Giri; Yating Wang; Arindam Chakraborty; Archit K. Ghosh; Aparna Anantharaman; Vasudha Aggarwal ..., Proceedings of the National Academy of Sciences current issue, 2015

Ribosome biogenesis dictates the translational capacity of cells. Several mechanisms establish and maintain transcriptional output from eukaryotic ribosomal DNA (rDNA) loci. rDNA silencing is one such mechanism that ensures the inactivity and hence the maintenance of a silenced state of a subset ...

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The bHLH transcription factor BIS1 controls the iridoid branch of the monoterpenoid indole alkaloid pathway in Catharanthus roseus [Plant Biology]

30-Jun-2015 | Alex Van Moerkercke; Priscille Steensma; Fabian Schweizer; Jacob Pollier; Ivo Gariboldi; Richard Payne; Robin Vanden ..., Proceedings of the National Academy of Sciences current issue, 2015

Plants make specialized bioactive metabolites to defend themselves against attackers. The conserved control mechanisms are based on transcriptional activation of the respective plant species-specific biosynthetic pathways by the phytohormone jasmonate. Knowledge of the transcription factors ...

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Hemocyte differentiation mediates the mosquito late-phase immune response against Plasmodium in Anopheles gambiae [Microbiology]

30-Jun-2015 | Ryan C. Smith; Carolina Barillas-Mury; Marcelo Jacobs-Lorena, Proceedings of the National Academy of Sciences current issue, 2015

Plasmodium parasites must complete development in the mosquito vector for transmission to occur. The mosquito innate immune response is remarkably efficient in limiting parasite numbers. Previous work has identified a LPS-induced TNFα transcription factor (LITAF)-like transcription factor, ...

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Transcriptional modulator ZBED6 affects cell cycle and growth of human colorectal cancer cells [Cell Biology]

23-Jun-2015 | Muhammad Akhtar Ali; Shady Younis; Ola Wallerman; Rajesh Gupta; Leif Andersson; Tobias Sjöblom, Proceedings of the National Academy of Sciences current issue, 2015

The transcription factor ZBED6 (zinc finger, BED-type containing 6) is a repressor of IGF2 whose action impacts development, cell proliferation, and growth in placental mammals. In human colorectal cancers, IGF2 overexpression is mutually exclusive with somatic mutations in PI3K signaling ...

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