Function
Together with CGR2, required for homogalacturonan pectins (HG) methylesterification in the Golgi apparatus prior to integration into cell walls, essential for general growth and development (PubMed:21422118, PubMed:25704846, PubMed:27208234). Promotes petiole elongation (PubMed:21422118). Impacts photosynthesis and respiration efficiency by influencing leaf mesophyll morphology and physiology; pectin methylesterification modulates both expansion and positioning of cells in leaves, probably by changing cell walls plasticity (PubMed:27208234).