A new, robust, and nonradioactive approach for exploring N-myristoylation
Myristoyl-CoA (CoA):protein N-myristoyltransferase (NMT) catalyzes protein modification through covalent attachment of a C14 fatty acid (myristic acid) to the N-terminal glycine of proteins, thus promoting protein-protein and protein-membrane interactions. NMT is essential for the viability of numer...
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
July 24, 2012
|
| In: |
Journal of lipid research
Year: 2012, Jahrgang: 53, Heft: 11, Pages: 2459-2468 |
| ISSN: | 1539-7262 |
| DOI: | 10.1194/jlr.D026997 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1194/jlr.D026997 Verlag, Volltext: http://www.jlr.org/content/53/11/2459 
|
| Verfasserangaben: | Francesca Rampoldi, Roger Sandhoff, Robert W. Owen, Hermann-Josef Gröne, and Stefan Porubsky |
| Zusammenfassung: | Myristoyl-CoA (CoA):protein N-myristoyltransferase (NMT) catalyzes protein modification through covalent attachment of a C14 fatty acid (myristic acid) to the N-terminal glycine of proteins, thus promoting protein-protein and protein-membrane interactions. NMT is essential for the viability of numerous human pathogens and is also up-regulated in several tumors. Here we describe a new, nonradioactive, ELISA-based method for measuring NMT activity. After the NMT-catalyzed reaction between a FLAG-tagged peptide and azido-dodecanoyl-CoA (analog of myristoyl-CoA), the resulting azido-dodecanoyl-peptide-FLAG was coupled to phosphine-biotin by Staudinger ligation, captured by plate-bound anti-FLAG antibodies and detected by streptavidin-peroxidase. The assay was validated with negative controls (including inhibitors), corroborated by HPLC analysis, and demonstrated to function with fresh or frozen tissues. Recombinant murine NMT1 and NMT2 were characterized using this new method. This versatile assay is applicable for exploring recombinant NMTs with regard to their activity, substrate specificity, and possible inhibitors as well as for measuring NMT-activity in tissues. |
|---|---|
| Beschreibung: | Gesehen am 21.11.2018 |
| Beschreibung: | Online Resource |
| ISSN: | 1539-7262 |
| DOI: | 10.1194/jlr.D026997 |