Enrichment of hydrophobic membrane proteins using Triton X-114 and subsequent analysis of their N-glycosylation.
Biochim Biophys Acta
; 1860(8): 1710-5, 2016 Aug.
Article
in En
| MEDLINE
| ID: mdl-26746104
ABSTRACT
BACKGROUND:
Numerous proteins depend on correct glycosylation for their proper function and nearly all membrane, as well as secreted, proteins are glycosylated. Glycosylation of membrane proteins plays a crucial role in many processes including the intercellular recognition and intermolecular interactions on the cell surface. The composition of N-glycans attached to membrane proteins has not been sufficiently studied due to the lack of efficient and reproducible analytical methods.METHODS:
The aim of this study was to optimise cloud-point extraction (CPE) of membrane proteins with the non-ionic detergent Triton X-114 and analyse their N-glycosylation using hydrophilic interaction liquid chromatography (HILIC-UPLC). Purification of isolated proteins from the excess of detergent proved to be the key step. Therefore, several purification procedures were tested to efficiently remove detergent, while retaining maximum protein recoveries.RESULTS:
CPE showed to be an efficient method to simultaneously extract membrane and soluble proteins, which subsequently resulted in different N-glycan profiles of the aforementioned protein groups. The resulting protocol showed satisfactory reproducibility and potential for N-glycan analysis of both membrane and intracellular (soluble) proteins from different kinds of biological material.CONCLUSIONS:
This method can be used as a new analytical tool for reliable detection and quantification of oligomannose and complex type N-glycans attached to membrane proteins, thus serving to distinguish between differences in cell types and states. GENERALSIGNIFICANCE:
The simple method was successfully optimised to generate reliable HILIC-UPLC profiles of N-glycans released from membrane proteins. This article is part of a Special Issue entitled "Glycans in personalised medicine" Guest Editor Professor Gordan Lauc.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polyethylene Glycols
/
Glycoproteins
/
Cell Membrane
/
Membrane Proteins
Limits:
Animals
/
Humans
Language:
En
Journal:
Biochim Biophys Acta
Year:
2016
Type:
Article
Affiliation country:
Croatia