Functional modelling of planar cell polarity: an approach for identifying molecular function

Area of Science:

• Developmental Biology
• Computational Biology
• Genetics

Background:

• Cells exhibit apical-basal polarity and planar cell polarity (PCP) within tissues.
• PCP is vital for establishing tissue organization during development.
• PCP defines the in-plane tissue coordinate system at the cellular level.

Purpose of the Study:

• To develop and validate an in-silico functional model of cellular polarization.
• To investigate the roles of cellular asymmetry, cell-cell signaling, and global cues in PCP.
• To classify protein functions in PCP generation using computational predictions.

Main Methods:

• Construction of an in-silico functional model of cellular polarization.
• Incorporation of cellular asymmetry, cell-cell signaling, and global cue response.
• Validation and parameterization against Drosophila wing hair phenotypes.

Main Results:

• The model successfully replicates domineering non-autonomous wing hair phenotypes in Drosophila.
• Systematic comparison of in-silico and in vivo polarity phenotypes was performed.
• Specific functional roles of proteins, including Pk and Dsh, in PCP were classified.

Conclusions:

• The developed model accurately predicts gene functions from genetic mosaic analysis in Drosophila wings.
• New hypotheses regarding the specific functions of PCP proteins like Pk and Dsh were generated.
• The study provides a framework for understanding PCP mechanisms and protein functions.