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Table of Contents (PDF) January 31, 2012 u vol. 109 u no. 5 u 1355–1808 Cover image: A bright pink seed pod and older senescent seed pods harboring black seeds are shown on the terminal structure, called a cephalium, of a Melocactus plant. Fang Chen et al. found that the dark coats enveloping the seeds of Melocactus, other cactus species, and the vanilla orchid contain a lignin polymer formed by the oxidative polymerization of an unusual monolignol known as caffeyl alcohol. The findings could help researchers develop lignin bioengineering methods while also providing insights into the diversity of land plants. See the article by Chen et al. on pages 1772–1777. Image courtesy of Broderick Stearns (Samuel Roberts Noble Foundation, Ardmore, OK). From the Cover 1772 Lignin polymers in nature 1396 Extraterrestrial quasicrystals 1437 Magnetic fields and enzyme reactions 1607 Timing cytokine secretion from T cells 1691 Antibiotics in agriculture Contents COMMENTARIES 1357 Are biochemical reactions affected by weak magnetic fields? THIS WEEK IN PNAS P. J. Hore See companion article on page 1437 1355 In This Issue 1359 Travels in time: Assessing the functional complexity of T cells W. Nicholas Haining See companion article on page 1607 LETTERS (ONLINE ONLY) E206 Femtosecond laser vaporization that preserves PNAS PLUS (AUTHOR SUMMARIES) protein-folded structure: An unproven idea Kathrin Breuker, Owen S. Skinner, and Fred W. McLafferty BIOLOGICAL SCIENCES E207 Reply to Breuker et al.: How laser electrospray mass spectrometry (LEMS) measures condensed phase BIOCHEMISTRY protein structure, not vacuum structure John J. Brady, Elizabeth J. Judge, and Robert J. Levis 1361 Mechanism of proton/substrate coupling in the heptahelical lysosomal transporter cystinosin E208 Are low-frequency songs sexually selected, and do they Raquel Ruivo, Gian Carlo Bellenchi, Xiong Chen, Giovanni lose their potency in male–female interactions under Zifarelli, Corinne Sagné, Cécile Debacker, Michael Pusch, noisy conditions? Stéphane Supplisson, and Bruno Gasnier Marcel Eens, Hector Fabio Rivera-Gutierrez, See full research article on page E210 of www.pnas.org and Rianne Pinxten E209 Reply to Eens et al.: Urban noise can alter sexual BIOPHYSICS AND COMPUTATIONAL BIOLOGY selection on bird song 1363 Full-length myosin Va exhibits altered gating during Wouter Halfwerk, Sander Bot, Jasper Buikx, Marco van der processive movement on actin Velde, Jan Komdeur, Carel ten Cate, and Hans Slabbekoorn Jessica M. Armstrong, Elena Krementsova, Arthur J. Michalek, Aoife T. Heaslip, Shane R. Nelson, Kathleen M. Trybus, and David M. Warshaw Free online through the PNAS open access option. See full research article on page E218 of www.pnas.org PNAS u January 31, 2012 u vol. 109 u no. 5 u iii–viii Downloaded by guest on September 24, 2021 DEVELOPMENTAL BIOLOGY RETROSPECTIVE 1365 The channel kinase, TRPM7, is required for early embryonic development Jie Jin, Long-Jun Wu, Janice Jun, Xiping Cheng, Haoxing Xu, 1379 Anthony E. Siegman: Laser pioneer, Optical Society Nancy C. Andrews, and David E. Clapham president, friend, and colleague See full research article on page E225 of www.pnas.org Stephen E. Harris EVOLUTION INAUGURAL ARTICLES 1367 Evolution of patterns on Conus shells Zhenqiang Gong, Nichilos J. Matzke, Bard Ermentrout, 1380 Molecular architecture of the 26S proteasome Dawn Song, Jann E. Vendetti, Montgomery Slatkin, holocomplex determined by an integrative approach and George Oster Keren Lasker, Friedrich Förster, Stefan Bohn, Thomas See full research article on page E234 of www.pnas.org Walzthoeni, Elizabeth Villa, Pia Unverdorben, Florian Beck, Ruedi Aebersold, Andrej Sali, and Wolfgang Baumeister MEDICAL SCIENCES 1388 Functional profiling of neurons through cellular neuropharmacology 1368 Glycogen synthase kinase 3β transfers cytoprotective Russell W. Teichert, Nathan J. Smith, Shrinivasan signaling through connexin 43 onto mitochondrial Raghuraman, Doju Yoshikami, Alan R. Light, ATP-sensitive K+ channels and Baldomero M. Olivera Dennis Rottlaender, Kerstin Boengler, Martin Wolny, Astrid Schwaiger, Lukas J. Motloch, Michel Ovize, Rainer Schulz, Gerd Heusch, and Uta C. Hoppe See full research article on page E242 of www.pnas.org PHYSICAL SCIENCES 1370 Convergent structural alterations define SWItch/Sucrose NonFermentable (SWI/SNF) chromatin remodeler as APPLIED PHYSICAL SCIENCES a central tumor suppressive complex in pancreatic cancer 1396 Evidence for the extraterrestrial origin of A. Hunter Shain, Craig P. Giacomini, Karen Matsukuma, a natural quasicrystal Collins A. Karikari, Murali D. Bashyam, Manuel Hidalgo, Luca Bindi, John M. Eiler, Yunbin Guan, Lincoln S. Hollister, Anirban Maitra, and Jonathan R. Pollack Glenn MacPherson, Paul J. Steinhardt, and Nan Yao See full research article on page E252 of www.pnas.org 1402 Unidirectionally aligned line patterns driven by entropic effects on faceted surfaces MICROBIOLOGY Sung Woo Hong, June Huh, Xiaodan Gu, Dong Hyun Lee, Won Ho Jo, Soojin Park, Ting Xu, and Thomas P. Russell 1372 Systematic identification of interactions between host cell proteins and E7 oncoproteins from diverse 1506 Spatial organization of the extracellular matrix regulates human papillomaviruses cell–cell junction positioning Elizabeth A. White, Mathew E. Sowa, Min Jie Alvin Tan, Qingzong Tseng, Eve Duchemin-Pelletier, Alexandre Sheila Jeudy, Sebastian D. Hayes, Sreevidya Santha, Deshiere, Martial Balland, Hervé Guillou, Karl Münger, J. Wade Harper, and Peter M. Howley Odile Filhol, and Manuel Théry See full research article on page E260 of www.pnas.org CHEMISTRY NEUROSCIENCE 1407 Coaxial multishell nanowires with high-quality electronic interfaces and tunable optical 1374 Distinct energy metabolism of auditory and vestibular cavities for ultrathin photovoltaics sensory epithelia revealed by quantitative mass Thomas J. Kempa, James F. Cahoon, Sun-Kyung Kim, spectrometry using MS2 intensity Robert W. Day, David C. Bell, Hong-Gyu Park, Kateri J. Spinelli, John E. Klimek, Phillip A. Wilmarth, and Charles M. Lieber Jung-Bum Shin, Dongseok Choi, Larry L. David, and Peter G. Gillespie 1413 Constant-speed vibrational signaling along See full research article on page E268 of www.pnas.org polyethyleneglycol chain up to 60-Å distance Zhiwei Lin and Igor V. Rubtsov 1376 GluN2B subunit deletion reveals key role in acute and chronic ethanol sensitivity of glutamate synapses 1467 Sampling protein motion and solvent effect during in bed nucleus of the stria terminalis ligand binding Tiffany A. Wills, Jason R. Klug, Yuval Silberman, Anthony J. Vittorio Limongelli, Luciana Marinelli, Sandro Cosconati, Baucum, Carl Weitlauf, Roger J. Colbran, Eric Delpire, Concettina La Motta, Stefania Sartini, Laura Mugnaini, and Danny G. Winder Federico Da Settimo, Ettore Novellino, See full research article on page E278 of www.pnas.org and Michele Parrinello EARTH, ATMOSPHERIC, AND PLANETARY SCIENCES 1584 Carnivorous dinocephalian from the Middle Permian of QNAS Brazil and tetrapod dispersal in Pangaea Juan Carlos Cisneros, Fernando Abdala, Saniye 1378 QnAs with Harald zur Hausen Atayman-Güven, Bruce S. Rubidge, A. M. Celâl Sxengör, Catherine Kolf and Cesar L. Schultz iv u www.pnas.org Downloaded by guest on September 24, 2021 1589 Exceptionally preserved crustaceans from western 1449 Critical role of a transmembrane lysine in Canada reveal a cryptic Cambrian radiation aminophospholipid transport by mammalian Thomas H. P. Harvey, Maria I. Vélez, photoreceptor P4-ATPase ATP8A2 and Nicholas J. Butterfield Jonathan A. Coleman, Anna L. Vestergaard, Robert S. Molday, Bente Vilsen, and Jens Peter Andersen ENGINEERING 1455 Differential regulation of the activity of deleted in liver 1607 Polyfunctional responses by human T cells result from cancer 1 (DLC1) by tensins controls cell migration sequential release of cytokines and transformation Qing Han, Neda Bagheri, Elizabeth M. Bradshaw, David A. Xuan Cao, Courtney Voss, Bing Zhao, Tomonori Kaneko, Hafler, Douglas A. Lauffenburger, and J. Christopher Love and Shawn Shun-Cheng Li See Commentary on page 1359 1461 Protein-binding dynamics imaged in a living cell Yael Phillip, Vladimir Kiss, and Gideon Schreiber PHYSICS 1437 Reexamination of magnetic isotope and field effects on adenosine triphosphate production by creatine kinase BIOPHYSICS AND COMPUTATIONAL BIOLOGY Darragh Crotty, Gary Silkstone, Soumya Poddar, Richard 1380 Molecular architecture of the 26S proteasome Ranson, Adriele Prina-Mello, Michael T. Wilson, holocomplex determined by an integrative approach and J. M. D. Coey Keren Lasker, Friedrich Förster, Stefan Bohn, Thomas See Commentary on page 1357 Walzthoeni, Elizabeth Villa, Pia Unverdorben, Florian Beck, 1473 Tracking energy transfer between light harvesting Ruedi Aebersold, Andrej Sali, and Wolfgang Baumeister complex 2 and 1 in photosynthetic membranes grown 1467 Sampling protein motion and solvent effect during under high and low illumination ligand binding Larry Lüer, Vladimíra Moulisová, Sarah Henry, Dario Polli, Vittorio Limongelli, Luciana Marinelli, Sandro Cosconati, Tatas H. P. Brotosudarmo, Sajjad Hoseinkhani, Daniele Concettina La Motta, Stefania Sartini, Laura Mugnaini, Brida, Guglielmo Lanzani, Giulio Cerullo, Federico Da Settimo, Ettore Novellino, and Richard J. Cogdell and Michele Parrinello 1473 Tracking energy transfer between light harvesting complex 2 and 1 in photosynthetic membranes grown SOCIAL SCIENCES under high and low illumination Larry Lüer, Vladimíra Moulisová, Sarah Henry, Dario Polli, ANTHROPOLOGY Tatas H. P. Brotosudarmo, Sajjad
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