Comprehensive classification of the plant non-specific lipid transfer protein superfamily towards its Sequence -Structure -Function analysis

TL;DR

This paper presents a comprehensive classification and analysis of plant non-specific lipid transfer proteins (nsLTPs), integrating sequence, structure, and function data to better understand their roles and develop new analytical tools.

Contribution

It introduces a novel classification framework for nsLTPs that combines sequence, structural, and functional information, addressing the challenge of their high divergence.

Findings

Identified conserved structural features across diverse nsLTP sequences.

Established correlations between sequence motifs and functional roles.

Validated the classification approach on a large dataset of nsLTPs.

Abstract

Background. Non-specific Lipid Transfer Proteins (nsLTPs) are widely distributed in the plant kingdom and constitute a superfamily of related proteins. More than 800 different sequences have been characterized so far, but their biological functions remain unclear. It has been clear for years that they present a certain interest for agronomic and nutritional issues. Deciphering their functions means collecting and analyzing a variety of data from gene sequence to protein structure, from cellular localization to the physiological role. As a huge and growing number of new protein sequences are available nowadays, extracting meaningful knowledge from sequence-structure-function relationships calls for the development of new tools and approaches. As nsLTPs show high evolutionary divergence, but a conserved common right-handed superhelix structural fold, and as they are involved in a large number of key roles in plant development and defense, they are a stimulating case study for validating such an approach.