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Separation and Fractionation of Cell Wall and Cell Membrane Proteins from Mycobacterium tuberculosis for Downstream Protein Analysis
Published on: September 26, 2025
796
Mycobacterium tuberculosis Complex Exhibits Lineage-Specific Variations Affecting Protein Ductility and Epitope
Inmaculada Yruela1,2, Bruno Contreras-Moreira1,2,3, Carlos Magalhães4,5
1Estación Experimental de Aula Dei-Consejo Superior de Investigaciones Científicas (EEAD-CSIC), Zaragoza, Spain.
Genome Biology and Evolution
|January 8, 2017
Summary
Whole-genome sequencing reveals protein variations in the Mycobacterium tuberculosis Complex impact metabolism and respiration. These genetic changes affect protein flexibility and immune epitopes, influencing host interactions.
Area of Science:
- Genomics
- Molecular Biology
- Evolutionary Biology
Background:
- Whole-genome sequencing offers deep insights into Mycobacterium tuberculosis Complex (MTBC) evolution and genetic variations.
- Functional implications of protein-coding sequence variations within MTBC remain understudied.
Purpose of the Study:
- To compare coding sequences across 74 mycobacterial species.
- To investigate the functional impact of genetic variations on protein ductility and T-cell epitopes.
Main Methods:
- Comparative analysis of coding sequences from 74 mycobacterial species.
- In silico exploration of protein ductility/disorder.
- Identification of mutations in T-cell epitopes and analysis of their interaction with HLA haplogroups.
Main Results:
- Proteins in lipid metabolism, intermediary metabolism, and respiration show accumulated mutations.
- Gly71Ile substitution in PhoPR system and SmtB variations impact protein ductility and flexibility.
- Strain- and lineage-specific mutations identified in T-cell epitopes (EsxH, FbpA) affect HLA interactions.
Conclusions:
- Genetic variations in MTBC significantly impact protein function, particularly in metabolism and respiration.
- Protein ductility is a crucial, yet under-explored, feature affected by MTBC mutations.
- Identified epitope variations have implications for immune recognition and host-pathogen interactions.
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