PPME1 Antibody – Rabbit Polyclonal

Function: Acts in the modification of cell walls via demethylesterification of cell wall pectin. Involved in the pollen tube growth and determination of pollen tube morphology. Ref.5

Catalytic activity: Pectin + n H2O = n methanol + pectate.

Pathway: Glycan metabolism; pectin degradation; 2-dehydro-3-deoxy-D-gluconate from pectin: step 1/5.

Subunit structure: Interacts with PMEI2, and in vitro with PMEI1. Ref.7

Subcellular location: Endoplasmic reticulum. Golgi apparatus. Secreted › cell wall Ref.5 Ref.7.

Tissue specificity: Expressed in mature pollen grains in the anthers and on the stigma. Found in pollen tubes within the style. Located at the tip and in the shank of the pollen tube. Ref.5 Ref.6 Ref.7

Disruption phenotype: After germination, the pollen tube is sunted, curved and has an irregular morphology. No effect on the morphology of ungerminated pollen grains, on the efficiency of pollen germination, fertilization or seed production. Ref.5

Miscellaneous: The pectin methylesterase activity is inhibited by PMEI2.

Sequence similarities: Belongs to the pectinesterase family.

Sequence caution: The sequence AAG52566.1 differs from that shown. Reason: Erroneous gene model prediction.