Full Membrane Protein Coverage Digestion and Quantitative Bottom-Up Mass Spectrometry Proteomics.
Methods Mol Biol
; 1550: 61-67, 2017.
Article
de En
| MEDLINE
| ID: mdl-28188523
ABSTRACT
A true and accurate bottom-up global proteomic measurement will only be achieved when all proteins in a sample can be digested efficiently and at least some peptides recovered on which to base an estimate of abundance. Integral membrane proteins make up around one-third of the proteome and require specialized protocols if they are to be successfully solubilized for efficient digestion by the enzymes used in bottom-up proteomics. The protocol described relies upon solubilization using the detergents sodium deoxycholate and lauryl sarcosine with heating to 95 °C. A subset of peptides is purified by reverse-phase solid-phase extraction and fractionated by strong-cation exchange prior to nano-liquid chromatography with data-dependent tandem mass spectrometry. For quantitative proteomics experiments a protocol is described for stable-isotope coding of peptides using dimethylation of primary amines allowing for three-way sample multiplexing.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Spectrométrie de masse
/
Protéome
/
Protéomique
/
Protéines membranaires
Langue:
En
Journal:
Methods Mol Biol
Sujet du journal:
BIOLOGIA MOLECULAR
Année:
2017
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique