Proceedings of the National Academy of Sciences: 111 (18)

New Research In

May 06, 2014; vol. 111 no. 18

This Week in PNAS

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In This Issue
PNAS May 6, 2014 111 (18) 6529-6530; https://doi.org/10.1073/iti1814111

Letters (Online Only)

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Human health risks of forest conservation
Greet De Coster, Francisco Anaruma Filho, and Rozely Ferreira dos Santos

PNAS May 6, 2014 111 (18) E1815; first published March 27, 2014. https://doi.org/10.1073/pnas.1401544111
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Reply to De Coster et al.: Exploring the complexity of ecosystem–human health relationships
Samuel S. Myers, Lynne Gaffikin, Christopher D. Golden, Richard S. Ostfeld, Kent H. Redford, Taylor H. Ricketts, Will R. Turner, and Steven A. Osofsky

PNAS May 6, 2014 111 (18) E1816; first published March 27, 2014. https://doi.org/10.1073/pnas.1402671111
See companion article:
Human health impacts of ecosystem alteration
- Nov 11, 2013
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Effective 2D model does not account for geometry sensing by self-organized proteins patterns
Jacob Halatek and Erwin Frey

PNAS May 6, 2014 111 (18) E1817; first published April 3, 2014. https://doi.org/10.1073/pnas.1220971111
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Nrf2 target genes can be controlled by neuronal activity in the absence of Nrf2 and astrocytes
Ruth F. Deighton, Nóra M. Márkus, Bashayer Al-Mubarak, Karen F. S. Bell, Sofia Papadia, Paul J. Meakin, Sudhir Chowdhry, John D. Hayes, and Giles E. Hardingham

PNAS May 6, 2014 111 (18) E1818-E1820; first published April 21, 2014. https://doi.org/10.1073/pnas.1402097111
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Reply to Deighton et al.: Neuronal activity regulates distinct antioxidant pathways in neurons and astrocytes
Agata Habas, Junghyun Hahn, Xianhong Wang, and Marta Margeta

PNAS May 6, 2014 111 (18) E1821-E1822; first published April 21, 2014. https://doi.org/10.1073/pnas.1403291111
See companion article:
Nrf2 regulation by neuronal activity
- Oct 21, 2013

Core Concepts

A brief introduction to emerging topics in science.

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Mirror neurons
Front Matter
Jessica Marshall

PNAS May 6, 2014 111 (18) 6531; https://doi.org/10.1073/pnas.1404652111

QnAs

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QnAs with Simon A. Levin
Paul Gabrielsen

PNAS May 6, 2014 111 (18) 6532; first published April 28, 2014. https://doi.org/10.1073/pnas.1406308111

Retrospective

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David W. Talmage, 1919–2014
Philippa Marrack, John C. Cambier, and Henry Claman

PNAS May 6, 2014 111 (18) 6533; first published May 5, 2014. https://doi.org/10.1073/pnas.1405718111

Commentaries

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Salmon, seabirds, and ecosystem dynamics
James A. Estes

PNAS May 6, 2014 111 (18) 6534-6535; first published April 16, 2014. https://doi.org/10.1073/pnas.1404905111
See companion article:
Top-down control of open ocean ecosystem function
- Mar 31, 2014
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The trouble with (group II) introns
W. Ford Doolittle

PNAS May 6, 2014 111 (18) 6536-6537; first published April 22, 2014. https://doi.org/10.1073/pnas.1405174111
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Group II intron silences nuclear gene
- Apr 10, 2014
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Nature’s toolkit for microbial rhodopsin ion pumps
Oded Béjà and Janos K. Lanyi

PNAS May 6, 2014 111 (18) 6538-6539; first published April 15, 2014. https://doi.org/10.1073/pnas.1405093111
See companion article:
New class of rhodopsin chloride pump in bacteria
- Mar 31, 2014

PNAS Plus Significance Statements

Brief statements written by the authors about the significance of their papers.

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PNAS Plus Significance Statements
PNAS May 6, 2014 111 (18) 6540-6541; https://doi.org/10.1073/pnas.ss11118

Perspective

Open Access
Changing the academic culture: Valuing patents and commercialization toward tenure and career advancement
Paul R. Sanberg, Morteza Gharib, Patrick T. Harker, Eric W. Kaler, Richard B. Marchase, Timothy D. Sands, Nasser Arshadi, and Sudeep Sarkar

PNAS May 6, 2014 111 (18) 6542-6547; first published April 28, 2014. https://doi.org/10.1073/pnas.1404094111

Physical Sciences

Applied Mathematics
- Open Access
  Conceptual dynamical models for turbulence
  Andrew J. Majda and Yoonsang Lee
  
  PNAS May 6, 2014 111 (18) 6548-6553; first published April 21, 2014. https://doi.org/10.1073/pnas.1404914111
Applied Physical Sciences
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  Long-range repulsion of colloids driven by ion exchange and diffusiophoresis
  Daniel Florea, Sami Musa, Jacques M. R. Huyghe, and Hans M. Wyss
  
  PNAS May 6, 2014 111 (18) 6554-6559; first published April 18, 2014. https://doi.org/10.1073/pnas.1322857111
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  Theory for plasticity of face-centered cubic metals
  Minho Jo, Yang Mo Koo, Byeong-Joo Lee, Börje Johansson, Levente Vitos, and Se Kyun Kwon
  
  PNAS May 6, 2014 111 (18) 6560-6565; first published April 21, 2014. https://doi.org/10.1073/pnas.1400786111
- Open Access
  Charge gradient microscopy
  Seungbum Hong, Sheng Tong, Woon Ik Park, Yoshiomi Hiranaga, Yasuo Cho, and Andreas Roelofs
  
  PNAS May 6, 2014 111 (18) 6566-6569; first published April 23, 2014. https://doi.org/10.1073/pnas.1324178111
Chemistry
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  Investigations of heme distortion, low-frequency vibrational excitations, and electron transfer in cytochrome c
  Yuhan Sun, Abdelkrim Benabbas, Weiqiao Zeng, Jesse G. Kleingardner, Kara L. Bren, and Paul M. Champion
  
  PNAS May 6, 2014 111 (18) 6570-6575; first published April 21, 2014. https://doi.org/10.1073/pnas.1322274111
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  How oxygen reacts with oxygen-tolerant respiratory [NiFe]-hydrogenases
  Philip Wulff, Christopher C. Day, Frank Sargent, and Fraser A. Armstrong
  
  PNAS May 6, 2014 111 (18) 6606-6611; first published April 8, 2014. https://doi.org/10.1073/pnas.1322393111
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  Effects of side chains in helix nucleation differ from helix propagation
  Stephen E. Miller, Andrew M. Watkins, Neville R. Kallenbach, and Paramjit S. Arora
  
  PNAS May 6, 2014 111 (18) 6636-6641; first published April 21, 2014. https://doi.org/10.1073/pnas.1322833111
Earth, Atmospheric, and Planetary Sciences
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  A bottom-up control on fresh-bedrock topography under landscapes
  Daniella M. Rempe and William E. Dietrich
  
  PNAS May 6, 2014 111 (18) 6576-6581; first published April 23, 2014. https://doi.org/10.1073/pnas.1404763111
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  Pronounced zonal heterogeneity in Eocene southern high-latitude sea surface temperatures
  Peter M. J. Douglas, Hagit P. Affek, Linda C. Ivany, Alexander J. P. Houben, Willem P. Sijp, Appy Sluijs, Stefan Schouten, and Mark Pagani
  
  PNAS May 6, 2014 111 (18) 6582-6587; first published April 21, 2014. https://doi.org/10.1073/pnas.1321441111
Engineering
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  Solid MRI contrast agents for long-term, quantitative in vivo oxygen sensing
  Vincent H. Liu, Christophoros C. Vassiliou, Syed M. Imaad, and Michael J. Cima
  
  PNAS May 6, 2014 111 (18) 6588-6593; first published April 21, 2014. https://doi.org/10.1073/pnas.1400015111
Environmental Sciences
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  Lead in ancient Rome’s city waters
  Hugo Delile, Janne Blichert-Toft, Jean-Philippe Goiran, Simon Keay, and Francis Albarède
  
  PNAS May 6, 2014 111 (18) 6594-6599; first published April 21, 2014. https://doi.org/10.1073/pnas.1400097111

Biological Sciences

Applied Biological Sciences
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  Multiplexed DNA repair assays for multiple lesions and multiple doses via transcription inhibition and transcriptional mutagenesis
  Zachary D. Nagel, Carrie M. Margulies, Isaac A. Chaim, Siobhan K. McRee, Patrizia Mazzucato, Anwaar Ahmad, Ryan P. Abo, Vincent L. Butty, Anthony L. Forget, and Leona D. Samson
  
  PNAS May 6, 2014 111 (18) E1823-E1832; first published April 22, 2014. https://doi.org/10.1073/pnas.1401182111
Biochemistry
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  Myosin-10 produces its power-stroke in two phases and moves processively along a single actin filament under low load
  Yasuharu Takagi, Rachel E. Farrow, Neil Billington, Attila Nagy, Christopher Batters, Yi Yang, James R. Sellers, and Justin E. Molloy
  
  PNAS May 6, 2014 111 (18) E1833-E1842; first published April 21, 2014. https://doi.org/10.1073/pnas.1320122111
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  GTP activator and dNTP substrates of HIV-1 restriction factor SAMHD1 generate a long-lived activated state
  Erik C. Hansen, Kyle J. Seamon, Shannen L. Cravens, and James T. Stivers
  
  PNAS May 6, 2014 111 (18) E1843-E1851; first published April 21, 2014. https://doi.org/10.1073/pnas.1401706111
- Open Access
  A bimodular nuclear localization signal assembled via an extended double-stranded RNA-binding domain acts as an RNA-sensing signal for transportin 1
  Pierre Barraud, Silpi Banerjee, Weaam I. Mohamed, Michael F. Jantsch, and Frédéric H.-T. Allain
  
  PNAS May 6, 2014 111 (18) E1852-E1861; first published April 21, 2014. https://doi.org/10.1073/pnas.1323698111
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  How oxygen reacts with oxygen-tolerant respiratory [NiFe]-hydrogenases
  Philip Wulff, Christopher C. Day, Frank Sargent, and Fraser A. Armstrong
  
  PNAS May 6, 2014 111 (18) 6606-6611; first published April 8, 2014. https://doi.org/10.1073/pnas.1322393111
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  RNA–RNA interactions and pre-mRNA mislocalization as drivers of group II intron loss from nuclear genomes
  From the Cover
  
  Guosheng Qu, Xiaolong Dong, Carol Lyn Piazza, Venkata R. Chalamcharla, Sheila Lutz, M. Joan Curcio, and Marlene Belfort
  
  PNAS May 6, 2014 111 (18) 6612-6617; first published April 10, 2014. https://doi.org/10.1073/pnas.1404276111
  
  See companion article:
  The trouble with (group II) introns
  - Apr 22, 2014
- Open Access
  CasA mediates Cas3-catalyzed target degradation during CRISPR RNA-guided interference
  Megan L. Hochstrasser, David W. Taylor, Prashant Bhat, Chantal K. Guegler, Samuel H. Sternberg, Eva Nogales, and Jennifer A. Doudna
  
  PNAS May 6, 2014 111 (18) 6618-6623; first published April 18, 2014. https://doi.org/10.1073/pnas.1405079111
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  Structural basis for diversity in the SAM clan of riboswitches
  Jeremiah J. Trausch, Zhenjiang Xu, Andrea L. Edwards, Francis E. Reyes, Phillip E. Ross, Rob Knight, and Robert T. Batey
  
  PNAS May 6, 2014 111 (18) 6624-6629; first published April 21, 2014. https://doi.org/10.1073/pnas.1312918111
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  Crystal structure of Arabidopsis glutamyl-tRNA reductase in complex with its stimulator protein
  Aiguo Zhao, Ying Fang, Xuemin Chen, Shun Zhao, Wei Dong, Yajing Lin, Weimin Gong, and Lin Liu
  
  PNAS May 6, 2014 111 (18) 6630-6635; first published April 21, 2014. https://doi.org/10.1073/pnas.1400166111
Biophysics and Computational Biology
- Open Access
  Single-molecule analysis reveals human UV-damaged DNA-binding protein (UV-DDB) dimerizes on DNA via multiple kinetic intermediates
  Harshad Ghodke, Hong Wang, Ching L. Hsieh, Selamawit Woldemeskel, Simon C. Watkins, Vesna Rapić-Otrin, and Bennett Van Houten
  
  PNAS May 6, 2014 111 (18) E1862-E1871; first published April 23, 2014. https://doi.org/10.1073/pnas.1323856111
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  Effects of side chains in helix nucleation differ from helix propagation
  Stephen E. Miller, Andrew M. Watkins, Neville R. Kallenbach, and Paramjit S. Arora
  
  PNAS May 6, 2014 111 (18) 6636-6641; first published April 21, 2014. https://doi.org/10.1073/pnas.1322833111
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  Transcription factors TFIIF and TFIIS promote transcript elongation by RNA polymerase II by synergistic and independent mechanisms
  Volker Schweikhard, Cong Meng, Kenji Murakami, Craig D. Kaplan, Roger D. Kornberg, and Steven M. Block
  
  PNAS May 6, 2014 111 (18) 6642-6647; first published April 14, 2014. https://doi.org/10.1073/pnas.1405181111
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  Structure of a mitochondrial cytochrome c conformer competent for peroxidase activity
  Levi J. McClelland, Tung-Chung Mou, Margaret E. Jeakins-Cooley, Stephen R. Sprang, and Bruce E. Bowler
  
  PNAS May 6, 2014 111 (18) 6648-6653; first published April 23, 2014. https://doi.org/10.1073/pnas.1323828111
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  Heat of supersaturation-limited amyloid burst directly monitored by isothermal titration calorimetry
  Tatsuya Ikenoue, Young-Ho Lee, József Kardos, Hisashi Yagi, Takahisa Ikegami, Hironobu Naiki, and Yuji Goto
  
  PNAS May 6, 2014 111 (18) 6654-6659; first published April 21, 2014. https://doi.org/10.1073/pnas.1322602111
Cell Biology
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  Control of MT1-MMP transport by atypical PKC during breast-cancer progression
  Carine Rossé, Catalina Lodillinsky, Laetitia Fuhrmann, Maya Nourieh, Pedro Monteiro, Marie Irondelle, Emilie Lagoutte, Sophie Vacher, François Waharte, Perrine Paul-Gilloteaux, Maryse Romao, Lucie Sengmanivong, Mark Linch, Johan van Lint, Graça Raposo, Anne Vincent-Salomon, Ivan Bièche, Peter J. Parker, and Philippe Chavrier
  
  PNAS May 6, 2014 111 (18) E1872-E1879; first published April 21, 2014. https://doi.org/10.1073/pnas.1400749111
Developmental Biology
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  Interepithelial signaling with nephric duct is required for the formation of overlying coelomic epithelial cell sheet
  Takashi Yoshino, Daisuke Saito, Yuji Atsuta, Chihiro Uchiyama, Shinya Ueda, Kiyotoshi Sekiguchi, and Yoshiko Takahashi
  
  PNAS May 6, 2014 111 (18) 6660-6665; first published April 21, 2014. https://doi.org/10.1073/pnas.1316728111
Ecology
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  Climate change, pink salmon, and the nexus between bottom-up and top-down forcing in the subarctic Pacific Ocean and Bering Sea
  From the Cover
  
  Alan M. Springer and Gus B. van Vliet
  
  PNAS May 6, 2014 111 (18) E1880-E1888; first published March 31, 2014. https://doi.org/10.1073/pnas.1319089111
  
  See companion article:
  Salmon, seabirds, and ecosystem dynamics
  - Apr 16, 2014
Evolution
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  Patterns of coding variation in the complete exomes of three Neandertals
  Sergi Castellano, Genís Parra, Federico A. Sánchez-Quinto, Fernando Racimo, Martin Kuhlwilm, Martin Kircher, Susanna Sawyer, Qiaomei Fu, Anja Heinze, Birgit Nickel, Jesse Dabney, Michael Siebauer, Louise White, Hernán A. Burbano, Gabriel Renaud, Udo Stenzel, Carles Lalueza-Fox, Marco de la Rasilla, Antonio Rosas, Pavao Rudan, Dejana Brajković, Željko Kucan, Ivan Gušic, Michael V. Shunkov, Anatoli P. Derevianko, Bence Viola, Matthias Meyer, Janet Kelso, Aida M. Andrés, and Svante Pääbo
  
  PNAS May 6, 2014 111 (18) 6666-6671; first published April 21, 2014. https://doi.org/10.1073/pnas.1405138111
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  Horizontal transfer of an adaptive chimeric photoreceptor from bryophytes to ferns
  Fay-Wei Li, Juan Carlos Villarreal, Steven Kelly, Carl J. Rothfels, Michael Melkonian, Eftychios Frangedakis, Markus Ruhsam, Erin M. Sigel, Joshua P. Der, Jarmila Pittermann, Dylan O. Burge, Lisa Pokorny, Anders Larsson, Tao Chen, Stina Weststrand, Philip Thomas, Eric Carpenter, Yong Zhang, Zhijian Tian, Li Chen, Zhixiang Yan, Ying Zhu, Xiao Sun, Jun Wang, Dennis W. Stevenson, Barbara J. Crandall-Stotler, A. Jonathan Shaw, Michael K. Deyholos, Douglas E. Soltis, Sean W. Graham, Michael D. Windham, Jane A. Langdale, Gane Ka-Shu Wong, Sarah Mathews, and Kathleen M. Pryer
  
  PNAS May 6, 2014 111 (18) 6672-6677; first published April 14, 2014. https://doi.org/10.1073/pnas.1319929111
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  Exploration of sequence space as the basis of viral RNA genome segmentation
  Elena Moreno, Samuel Ojosnegros, Juan García-Arriaza, Cristina Escarmís, Esteban Domingo, and Celia Perales
  
  PNAS May 6, 2014 111 (18) 6678-6683; first published April 22, 2014. https://doi.org/10.1073/pnas.1323136111
Genetics
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  Hypermutable DNA chronicles the evolution of human colon cancer
  Kamila Naxerova, Elena Brachtel, Jesse J. Salk, Aaron M. Seese, Karen Power, Bardia Abbasi, Matija Snuderl, Sarah Chiang, Simon Kasif, and Rakesh K. Jain
  
  PNAS May 6, 2014 111 (18) E1889-E1898; first published April 21, 2014. https://doi.org/10.1073/pnas.1400179111
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  Domain within the helicase subunit Mcm4 integrates multiple kinase signals to control DNA replication initiation and fork progression
  Yi-Jun Sheu, Justin B. Kinney, Armelle Lengronne, Philippe Pasero, and Bruce Stillman
  
  PNAS May 6, 2014 111 (18) E1899-E1908; first published April 16, 2014. https://doi.org/10.1073/pnas.1404063111
- Open Access
  Natural insertions in rice commonly form tandem duplications indicative of patch-mediated double-strand break induction and repair
  Justin N. Vaughn and Jeffrey L. Bennetzen
  
  PNAS May 6, 2014 111 (18) 6684-6689; first published April 23, 2014. https://doi.org/10.1073/pnas.1321854111
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  Regulation of DNA methylation turnover at LTR retrotransposons and imprinted loci by the histone methyltransferase Setdb1
  Danny Leung, Tingting Du, Ulrich Wagner, Wei Xie, Ah Young Lee, Preeti Goyal, Yujing Li, Keith E. Szulwach, Peng Jin, Matthew C. Lorincz, and Bing Ren
  
  PNAS May 6, 2014 111 (18) 6690-6695; first published April 22, 2014. https://doi.org/10.1073/pnas.1322273111
Immunology
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  Endoscopic photoconversion reveals unexpectedly broad leukocyte trafficking to and from the gut
  Angela M. Morton, Esen Sefik, Rabi Upadhyay, Ralph Weissleder, Christophe Benoist, and Diane Mathis
  
  PNAS May 6, 2014 111 (18) 6696-6701; first published April 21, 2014. https://doi.org/10.1073/pnas.1405634111
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  Host-derived, pore-forming toxin–like protein and trefoil factor complex protects the host against microbial infection
  From the Cover
  
  Yang Xiang, Chao Yan, Xiaolong Guo, Kaifeng Zhou, Sheng’an Li, Qian Gao, Xuan Wang, Feng Zhao, Jie Liu, Wen-Hui Lee, and Yun Zhang
  
  PNAS May 6, 2014 111 (18) 6702-6707; first published April 14, 2014. https://doi.org/10.1073/pnas.1321317111
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  Lytic immune synapse function requires filamentous actin deconstruction by Coronin 1A
  Emily M. Mace and Jordan S. Orange
  
  PNAS May 6, 2014 111 (18) 6708-6713; first published April 23, 2014. https://doi.org/10.1073/pnas.1314975111
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  Crystal structure of Streptococcus pyogenes EndoS, an immunomodulatory endoglycosidase specific for human IgG antibodies
  Beatriz Trastoy, Joseph V. Lomino, Brian G. Pierce, Lester G. Carter, Sebastian Günther, John P. Giddens, Greg A. Snyder, Thomas M. Weiss, Zhiping Weng, Lai-Xi Wang, and Eric J. Sundberg
  
  PNAS May 6, 2014 111 (18) 6714-6719; first published April 21, 2014. https://doi.org/10.1073/pnas.1322908111
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  Emergence of the A20/ABIN-mediated inhibition of NF-κB signaling via modifying the ubiquitinated proteins in a basal chordate
  Shaochun Yuan, Xiangru Dong, Xin Tao, Liqun Xu, Jie Ruan, Jian Peng, and Anlong Xu
  
  PNAS May 6, 2014 111 (18) 6720-6725; first published April 21, 2014. https://doi.org/10.1073/pnas.1321187111
Medical Sciences
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  Modulation of a voltage-gated Na⁺ channel by sevoflurane involves multiple sites and distinct mechanisms
  Annika F. Barber, Vincenzo Carnevale, Michael L. Klein, Roderic G. Eckenhoff, and Manuel Covarrubias
  
  PNAS May 6, 2014 111 (18) 6726-6731; first published April 21, 2014. https://doi.org/10.1073/pnas.1405768111
Microbiology
- Open Access
  Hassallidins, antifungal glycolipopeptides, are widespread among cyanobacteria and are the end-product of a nonribosomal pathway
  Johanna Vestola, Tania K. Shishido, Jouni Jokela, David P. Fewer, Olli Aitio, Perttu Permi, Matti Wahlsten, Hao Wang, Leo Rouhiainen, and Kaarina Sivonen
  
  PNAS May 6, 2014 111 (18) E1909-E1917; first published April 17, 2014. https://doi.org/10.1073/pnas.1320913111
- Open Access
  Functional characterization of flavobacteria rhodopsins reveals a unique class of light-driven chloride pump in bacteria
  From the Cover
  
  Susumu Yoshizawa, Yohei Kumagai, Hana Kim, Yoshitoshi Ogura, Tetsuya Hayashi, Wataru Iwasaki, Edward F. DeLong, and Kazuhiro Kogure
  
  PNAS May 6, 2014 111 (18) 6732-6737; first published March 31, 2014. https://doi.org/10.1073/pnas.1403051111
  
  See companion article:
  Nature's toolkit for microbial rhodopsin ion pumps
  - Apr 15, 2014
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  Molecular tracing of the emergence, diversification, and transmission of S. aureus sequence type 8 in a New York community
  From the Cover
  
  Anne-Catrin Uhlemann, Janina Dordel, Justin R. Knox, Kathy E. Raven, Julian Parkhill, Matthew T. G. Holden, Sharon J. Peacock, and Franklin D. Lowy
  
  PNAS May 6, 2014 111 (18) 6738-6743; first published April 21, 2014. https://doi.org/10.1073/pnas.1401006111
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  A tick-borne segmented RNA virus contains genome segments derived from unsegmented viral ancestors
  Xin-Cheng Qin, Mang Shi, Jun-Hua Tian, Xian-Dan Lin, Dong-Ya Gao, Jin-Rong He, Jian-Bo Wang, Ci-Xiu Li, Yan-Jun Kang, Bin Yu, Dun-Jin Zhou, Jianguo Xu, Alexander Plyusnin, Edward C. Holmes, and Yong-Zhen Zhang
  
  PNAS May 6, 2014 111 (18) 6744-6749; first published April 21, 2014. https://doi.org/10.1073/pnas.1324194111
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  An outer membrane channel protein of Mycobacterium tuberculosis with exotoxin activity
  Olga Danilchanka, Jim Sun, Mikhail Pavlenok, Christian Maueröder, Alexander Speer, Axel Siroy, Joeli Marrero, Carolina Trujillo, David L. Mayhew, Kathryn S. Doornbos, Luis E. Muñoz, Martin Herrmann, Sabine Ehrt, Christian Berens, and Michael Niederweis
  
  PNAS May 6, 2014 111 (18) 6750-6755; first published April 21, 2014. https://doi.org/10.1073/pnas.1400136111
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  Interferon induction of IFITM proteins promotes infection by human coronavirus OC43
  Xuesen Zhao, Fang Guo, Fei Liu, Andrea Cuconati, Jinhong Chang, Timothy M. Block, and Ju-Tao Guo
  
  PNAS May 6, 2014 111 (18) 6756-6761; first published April 21, 2014. https://doi.org/10.1073/pnas.1320856111
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  Transcriptional regulators ChlR and CnfR are essential for diazotrophic growth in nonheterocystous cyanobacteria
  Ryoma Tsujimoto, Narumi Kamiya, and Yuichi Fujita
  
  PNAS May 6, 2014 111 (18) 6762-6767; first published April 21, 2014. https://doi.org/10.1073/pnas.1323570111
- Open Access
  Parallel independent evolution of pathogenicity within the genus Yersinia
  Sandra Reuter, Thomas R. Connor, Lars Barquist, Danielle Walker, Theresa Feltwell, Simon R. Harris, Maria Fookes, Miquette E. Hall, Nicola K. Petty, Thilo M. Fuchs, Jukka Corander, Muriel Dufour, Tamara Ringwood, Cyril Savin, Christiane Bouchier, Liliane Martin, Minna Miettinen, Mikhail Shubin, Julia M. Riehm, Riikka Laukkanen-Ninios, Leila M. Sihvonen, Anja Siitonen, Mikael Skurnik, Juliana Pfrimer Falcão, Hiroshi Fukushima, Holger C. Scholz, Michael B. Prentice, Brendan W. Wren, Julian Parkhill, Elisabeth Carniel, Mark Achtman, Alan McNally, and Nicholas R. Thomson
  
  PNAS May 6, 2014 111 (18) 6768-6773; first published April 21, 2014. https://doi.org/10.1073/pnas.1317161111
Neuroscience
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  Automatic ultrarapid activation and inhibition of cortical motor systems in spoken word comprehension
  Yury Shtyrov, Anna Butorina, Anastasia Nikolaeva, and Tatiana Stroganova
  
  PNAS May 6, 2014 111 (18) E1918-E1923; first published April 21, 2014. https://doi.org/10.1073/pnas.1323158111
- Open Access
  The dynamic role of genetics on cortical patterning during childhood and adolescence
  J. Eric Schmitt, Michael C. Neale, Bilqis Fassassi, Javier Perez, Rhoshel K. Lenroot, Elizabeth M. Wells, and Jay N. Giedd
  
  PNAS May 6, 2014 111 (18) 6774-6779; first published April 21, 2014. https://doi.org/10.1073/pnas.1311630111
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  Cortical oscillations arise from contextual interactions that regulate sparse coding
  Monika P. Jadi and Terrence J. Sejnowski
  
  PNAS May 6, 2014 111 (18) 6780-6785; first published April 17, 2014. https://doi.org/10.1073/pnas.1405300111
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  Two-photon imaging of Zn²⁺ dynamics in mossy fiber boutons of adult hippocampal slices
  Mustafa Khan, Christian R. Goldsmith, Zhen Huang, John Georgiou, Thomas T. Luyben, John C. Roder, Stephen J. Lippard, and Kenichi Okamoto
  
  PNAS May 6, 2014 111 (18) 6786-6791; first published April 22, 2014. https://doi.org/10.1073/pnas.1405154111
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  Mechanisms of noise robust representation of speech in primary auditory cortex
  Nima Mesgarani, Stephen V. David, Jonathan B. Fritz, and Shihab A. Shamma
  
  PNAS May 6, 2014 111 (18) 6792-6797; first published April 21, 2014. https://doi.org/10.1073/pnas.1318017111
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  Cortical control of adaptation and sensory relay mode in the thalamus
  Rebecca A. Mease, Patrik Krieger, and Alexander Groh
  
  PNAS May 6, 2014 111 (18) 6798-6803; first published April 18, 2014. https://doi.org/10.1073/pnas.1318665111
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  Control of dopaminergic neuron survival by the unfolded protein response transcription factor XBP1
  Pamela Valdés, Gabriela Mercado, Rene L. Vidal, Claudia Molina, Geoffrey Parsons, Felipe A. Court, Alexis Martinez, Danny Galleguillos, Donna Armentano, Bernard L. Schneider, and Claudio Hetz
  
  PNAS May 6, 2014 111 (18) 6804-6809; first published April 21, 2014. https://doi.org/10.1073/pnas.1321845111
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  Dystroglycan mediates homeostatic synaptic plasticity at GABAergic synapses
  Horia Pribiag, Huashan Peng, Waris Ali Shah, David Stellwagen, and Salvatore Carbonetto
  
  PNAS May 6, 2014 111 (18) 6810-6815; first published April 21, 2014. https://doi.org/10.1073/pnas.1321774111
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  Heterogeneous organization of the locus coeruleus projections to prefrontal and motor cortices
  Daniel J. Chandler, Wen-Jun Gao, and Barry D. Waterhouse
  
  PNAS May 6, 2014 111 (18) 6816-6821; first published April 21, 2014. https://doi.org/10.1073/pnas.1320827111
- Open Access
  Symbol addition by monkeys provides evidence for normalized quantity coding
  Margaret S. Livingstone, Warren W. Pettine, Krishna Srihasam, Brandon Moore, Istvan A. Morocz, and Daeyeol Lee
  
  PNAS May 6, 2014 111 (18) 6822-6827; first published April 21, 2014. https://doi.org/10.1073/pnas.1404208111
Pharmacology
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  Myeloid cell microsomal prostaglandin E synthase-1 fosters atherogenesis in mice
  Lihong Chen, Guangrui Yang, James Monslow, Leslie Todd, David P. Cormode, Jun Tang, Gregory R. Grant, Jonathan H. DeLong, Soon Yew Tang, John A. Lawson, Ellen Pure, and Garret A. FitzGerald
  
  PNAS May 6, 2014 111 (18) 6828-6833; first published April 21, 2014. https://doi.org/10.1073/pnas.1401797111
- Open Access
  E3 ubiquitin ligase Cullin-5 modulates multiple molecular and cellular responses to heat shock protein 90 inhibition in human cancer cells
  Rahul S. Samant, Paul A. Clarke, and Paul Workman
  
  PNAS May 6, 2014 111 (18) 6834-6839; first published April 23, 2014. https://doi.org/10.1073/pnas.1322412111
Physiology
- Open Access
  Fetal programming of adult Leydig cell function by androgenic effects on stem/progenitor cells
  Karen R. Kilcoyne, Lee B. Smith, Nina Atanassova, Sheila Macpherson, Chris McKinnell, Sander van den Driesche, Matthew S. Jobling, Thomas J. G. Chambers, Karel De Gendt, Guido Verhoeven, Laura O’Hara, Sophie Platts, Luiz Renato de Franca, Nathália L. M. Lara, Richard A. Anderson, and Richard M. Sharpe
  
  PNAS May 6, 2014 111 (18) E1924-E1932; first published April 21, 2014. https://doi.org/10.1073/pnas.1320735111
Plant Biology
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  Cytokinin pathway mediates APETALA1 function in the establishment of determinate floral meristems in Arabidopsis
  Yingying Han, Cui Zhang, Haibian Yang, and Yuling Jiao
  
  PNAS May 6, 2014 111 (18) 6840-6845; first published April 21, 2014. https://doi.org/10.1073/pnas.1318532111
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  Decreased abundance of type III secretion system-inducing signals in Arabidopsis mkp1 enhances resistance against Pseudomonas syringae
  Jeffrey C. Anderson, Ying Wan, Young-Mo Kim, Ljiljana Pasa-Tolic, Thomas O. Metz, and Scott C. Peck
  
  PNAS May 6, 2014 111 (18) 6846-6851; first published April 21, 2014. https://doi.org/10.1073/pnas.1403248111
Psychological and Cognitive Sciences
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  Neural sensitivity to eudaimonic and hedonic rewards differentially predict adolescent depressive symptoms over time
  Eva H. Telzer, Andrew J. Fuligni, Matthew D. Lieberman, and Adriana Galván
  
  PNAS May 6, 2014 111 (18) 6600-6605; first published April 21, 2014. https://doi.org/10.1073/pnas.1323014111

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