Related Experiment Video
Updated: Aug 12, 2026

Budding Yeast Protein Extraction and Purification for the Study of Function, Interactions, and Post-translational Modifications
Published on: October 30, 2013
The essential yeast NLT1 gene encodes the 64 kDa glycoprotein subunit of the oligosaccharyl transferase
R Pathak1, C S Parker, B Imperiali
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena 91125, USA.
Abstract:
The yeast oligosaccharyl transferase catalyzes the glycosylation of asparagine residues in secreted, vesicular, and membrane proteins. A complex of at least four membrane-bound polypeptides is responsible for oligosaccharyl transferase activity. Amino acid sequences from the 64 kDa glycoprotein subunit of the complex were used to clone the essential NLT1 (N-linked oligosaccharyl transferase) gene. The Nlt1p gene product is a processed, multiply glycosylated type I membrane protein; it has an extensive amino-terminal soluble domain, a potential hydrophobic transmembrane domain, and a short carboxy-terminal soluble domain. The Nlt1p is significantly similar than the mammalian ribophorin I, a component of the mammalian oligosaccharyl transferase complex, and the enzyme is conserved throughout eukaryotic evolution.
More Related Videos
Related Concept Videos
Yeast Signaling
Protein Complexes with Interchangeable Parts
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Overview of Secretory Vesicles
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Oligosaccharide Assembly
Multiple sugar molecules that may or may...
Tail-anchoring of Proteins in the ER Membrane
Protein Translocation Machinery on the ER Membrane
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the translocon complex.

