| Literature DB >> 25826258 |
Fabien Sénéchal1, Alain Mareck, Paulo Marcelo, Patrice Lerouge, Jérôme Pelloux.
Abstract
The degree of methylesterification (DM) of homogalacturonans (HGs), the main constituent of pectins in Arabidopsis thaliana, can be modified by pectin methylesterases (PMEs). Regulation of PME activity occurs through interaction with PME inhibitors (PMEIs) and subtilases (SBTs). Considering the size of the gene families encoding PMEs, PMEIs and SBTs, it is highly likely that specific pairs mediate localized changes in pectin structure with consequences on cell wall rheology and plant development. We previously reported that PME17, a group 2 PME expressed in root, could be processed by SBT3.5, a co-expressed subtilisin-like serine protease, to mediate changes in pectin properties and root growth. Here, we further report that a PMEI, PMEI4, is co-expressed with PME17 and is likely to regulate its activity. This sheds new light on the possible interplay of specific PMEs, PMEIs and SBTs in the fine-tuning of pectin structure.Entities:
Keywords: ARF, Auxin response factor; Arabidopsis thaliana; BES1/BIM1-3, BRI1 EMS suppressor 1/BES1 interaction MYC-like 1-3; Col-0, Columbia-0; DM, Degree of methylesterification; Gal-A, Galacturonic acid; HG, Homogalacturonan; IEF, Isoelectric focusing; KO, Knock-out; OG, Oligogalacturonide; PG, Polygalacturonase; PL, Pectate lyase; PM, Plasma membrane; PME, Pectin methylesterase; PMEI, Pectin methylesterase inhibitor; RLK, Receptor-like kinase; SBT, Subtilase; TF, Transcription factor; WAK, Wall-associated kinase; cell wall; co-expression; growth; pectin; pectin methylesterase; pectin methylesterase inhibitor; root; subtilase
Mesh：
Substances：
Year: 2015 PMID： 25826258 PMCID： PMC4622950 DOI： 10.4161/15592324.2014.983351
Source DB: PubMed Journal: Plant Signal Behav ISSN： 1559-2316