Identification and sequence determination of a cDNA clone for tomato pectin esterase

Area of Science:

• Plant Biochemistry
• Molecular Biology
• Fruit Ripening

Background:

• Cell wall softening is crucial for tomato fruit ripening, mediated by pectolytic enzymes.
• Polygalacturonase (PG) is a major cell wall degrading enzyme in tomatoes.
• Pectin esterase (PE) is another enzyme implicated in cell wall softening.

Purpose of the Study:

• To isolate and characterize the cDNA clone for tomato pectin esterase (PE).
• To determine the structure of the PE cDNA and compare it with existing amino acid sequence data.
• To investigate PE gene expression during tomato fruit development and ripening in normal and mutant varieties.

Main Methods:

• Isolation of a cDNA clone for tomato pectin esterase.
• Nucleotide sequencing of the PE cDNA.
• Comparison of cDNA sequence with amino acid sequence data.
• Analysis of PE gene expression using the isolated cDNA clone.

Main Results:

• A cDNA clone for tomato pectin esterase was successfully isolated.
• The structure of the PE cDNA was determined and compared to known amino acid sequences.
• PE gene expression patterns were analyzed during fruit development and ripening.

Conclusions:

• The study provides the cDNA sequence for tomato pectin esterase, contributing to understanding fruit softening mechanisms.
• Analysis of PE gene expression offers insights into its role in tomato fruit development and ripening.
• This research aids in the genetic manipulation of fruit ripening processes.