Ent 138: 4733741. Pelletier S, Van Orden J, Wolf S, et al. 2010. A part for SSTR3 Agonist review pectin de-methylesterification in a developmentally regulated growth acceleration in dark-grown Arabidopsis hypocotyls. New Phytologist 188: 72639. Pelloux J, Rusterucci C, Mellerowicz E. 2007. New insights into pectin methylesterase structure and function. Trends in Plant Science 12: 26777. Raiola A, Lionetti V, Elmaghraby I, et al. 2011. Pectin methylesterase is induced in Arabidopsis upon infection and is essential for a effective colonization by necrotrophic pathogens. Molecular Plant icrobe Interactions 24: 43240. Ramirez V, Lopez A, Mauch-Mani B, Gil MJ, Vera P. 2013. An extracellular subtilase switch for immune priming in Arabidopsis. PLoS Pathogens 9: e1003445. Rautengarten C, Steinhauser D, Bussis D, et al. 2005. Inferring hypotheses on functional relationships of genes: analysis with the Arabidopsis thaliana subtilase gene family. PLoS Computational Biology 1: e40. Rautengarten C, Usadel B, Neumetzler L, Hartmann J, Bussis D, Altmann T. 2008. A subtilisin-like serine protease important for mucilage release from Arabidopsis seed coats. The Plant Journal 54: 46680. ^ Rockel N, Wolf S, Kost B, Rausch T, Greiner S. 2008. Elaborate spatial patterning of cell-wall PME and PMEI at the pollen tube tip entails PMEI endocytosis, and reflects the distribution of esterified and de-esterified pectins. The Plant Journal 53: 13343. Rose R, Schaller A, Ottmann C. 2010. Structural options of plant subtilases. Plant Signaling Behavior five: 18083. Roy A, Kucukural A, Zhang Y. 2010. I-TASSER: a unified platform for automated protein structure and P2X7 Receptor Antagonist Molecular Weight function prediction. Nature Protocols 5: 725738. Saez-Aguayo S, Ralet MC, Berger A, et al. 2013. PECTIN METHYLESTERASE INHIBITOR6 promotes Arabidopsis mucilagerelease by limiting methylesterification of homogalacturonan in seed coat epidermal cells. The Plant Cell 25: 308 323. Sali A, Blundell TL. 1993. Comparative protein modeling by satisfaction of spatial constraints. Journal of Molecular Biology 234: 779 15. Schaller A, Stintzi A, Graff L. 2012. Subtilases versatile tools for protein turnover, plant development, and interactions with the environment. Physiologia Plantarum 145: 526. Schlosser A, Volkmer-Engert R. 2003. Volatile polydimethylcyclosiloxanes within the ambient laboratory air identified as supply of extreme background signals in nanoelectrospray mass spectrometry. Journal of Mass Spectrometry 38: 52325. Sessions A, Weigel D, Yanofsky M. 1999. The Arabidopsis thaliana MERISTEM LAYER 1 promoter specifies epidermal expression in meristems and young primordia. The Plant Journal 20: 259263. Shevchenko A, Wilm M, Vorm O, Mann M. 1996. Mass spectrometric sequencing of proteins silver-stained polyacrylamide gels. Analytical Chemistry 68: 85058. Shi J, Blundell TL, Mizuguchi K. 2001. FUGUE: sequence-structure homology recognition using environment-specific substitution tables and structuredependent gap penalties. Journal of Molecular Biology 310: 24357. Soding J, Biegert A, Lupas AN. 2005. The HHpred interactive server for protein homology detection and structure prediction. Nucleic Acids Investigation 33: 24448. Srivastava R, Liu JX, Howell SH. 2008. Proteolytic processing of a precursor protein for a growth-promoting peptide by a subtilisin serine protease in Arabidopsis. The Plant Journal 56: 21927. Srivastava R, Liu JX, Guo H, Yin Y, Howell SH. 2009. Regulation and processing of a plant peptide hormone, AtRALF23, in Arabidopsis.