Effect of cetyltrimethylammonium bromide (CTAB) on the conformation of a hen egg white lysozyme: A spectroscopic and molecular docking study.
Animals
Cetrimonium
/ metabolism
Chickens
Hydrogen-Ion Concentration
Hydrophobic and Hydrophilic Interactions
/ drug effects
Molecular Docking Simulation
Muramidase
/ chemistry
Protein Binding
Protein Conformation
/ drug effects
Protein Unfolding
/ drug effects
Static Electricity
Surface-Active Agents
/ metabolism
CTAB
Lysozyme
Protein stability
Journal
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
ISSN: 1873-3557
Titre abrégé: Spectrochim Acta A Mol Biomol Spectrosc
Pays: England
ID NLM: 9602533
Informations de publication
Date de publication:
05 Aug 2019
05 Aug 2019
Historique:
received:
29
01
2019
revised:
04
04
2019
accepted:
22
04
2019
pubmed:
6
5
2019
medline:
13
11
2019
entrez:
5
5
2019
Statut:
ppublish
Résumé
The interactions between cetyltrimethylammonium bromide (CTAB) and hen egg white lysozymes (HEWL) was carried out to investigate protein-surfactant interaction mechanisms while both exist in the overall same charged state. The interactions between CTAB and the HEWL were examined with circular dichroism (CD), dynamic light scattering (DLS), fluorescence spectroscopy, and computational docking at a pH9.0 at room temperature. The far-UV CD and fluorescence results revealed that CTAB at concentrations from 0.15 to 10.0mM influenced the secondary as well as the tertiary structure of HEWL. The secondary structure of the HEWL was retained, while the tertiary structure of the HEWL was disrupted in the CTAB-treated samples at pH9.0. The hydrodynamic radii of the HEWL were also expanded in the presence of CTAB. Molecular docking studies showed that CTAB formed one electrostatic and four hydrophobic interactions, as well as one carbon hydrogen bond with HEWL. The data obtained from spectroscopic and computational studies demonstrated that the positively charged head and 18‑carbon alkyl chain of the CTAB interacted through weak electrostatic and strong hydrophobic interactions.
Identifiants
pubmed: 31054495
pii: S1386-1425(19)30443-3
doi: 10.1016/j.saa.2019.04.062
pii:
doi:
Substances chimiques
Surface-Active Agents
0
hen egg lysozyme
EC 3.2.1.-
Muramidase
EC 3.2.1.17
Cetrimonium
Z7FF1XKL7A
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
313-318Informations de copyright
Copyright © 2019. Published by Elsevier B.V.