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Updated: May 12, 2026
07:49
Creating and Applying a Reference to Facilitate the Discussion and Classification of Proteins in a Diverse Group
Published on: August 16, 2017
Theoretical structural insights into the snakin/GASA family
William F Porto1, Octavio L Franco
1Centro de Análises Proteômicas e Bioquímicas, Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília-DF, Brazil.
Peptides
|April 13, 2013
Summary
The first structural characterization of snakin-1, a cysteine-stabilized antimicrobial peptide, reveals a unique two-alpha-helix fold. This finding provides crucial insights into the snakin/GASA family
Area of Science:
- Biochemistry
- Structural Biology
- Antimicrobial Peptides
Background:
- Cysteine-stabilized antimicrobial peptides are crucial in innate immunity.
- The snakin/GASA family, a key group of these peptides, lacks structural characterization.
- Understanding peptide structure is vital for elucidating function.
Purpose of the Study:
- To predict and characterize the three-dimensional structure of snakin-1.
- To provide the first structural insights into the snakin/GASA peptide family.
- To explore potential structural similarities with other peptide families.
Main Methods:
- Utilized ab initio and comparative modeling techniques.
- Employed a disulfide bond predictor for accuracy.
- Performed molecular dynamics simulations to assess structural stability.
Main Results:
- Predicted a stable three-dimensional structure for snakin-1.
- Identified a distinct fold comprising two long alpha-helices.
- Determined a specific disulfide bond pattern: Cys(I)-Cys(IX), Cys(II)-Cys(VII), Cys(III)-Cys(IV), Cys(V)-Cys(XI), Cys(VI)-Cys(XII), and Cys(VIII)-Cys(X).
- Observed minor structural similarities with thionins and alpha-helical hairpins.
Conclusions:
- This study presents the first structural characterization of snakin-1.
- The findings offer foundational structural data for the snakin/GASA family.
- The predicted structure provides a basis for future functional and mechanistic studies.
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