Unknown

Dataset Information

0

Definition of the bacterial N-glycosylation site consensus sequence.


ABSTRACT: The Campylobacter jejuni pgl locus encodes an N-linked protein glycosylation machinery that can be functionally transferred into Escherichia coli. In this system, we analyzed the elements in the C. jejuni N-glycoprotein AcrA required for accepting an N-glycan. We found that the eukaryotic primary consensus sequence for N-glycosylation is N terminally extended to D/E-Y-N-X-S/T (Y, X not equalP) for recognition by the bacterial oligosaccharyltransferase (OST) PglB. However, not all consensus sequences were N-glycosylated when they were either artificially introduced or when they were present in non-C. jejuni proteins. We were able to produce recombinant glycoproteins with engineered N-glycosylation sites and confirmed the requirement for a negatively charged side chain at position -2 in C. jejuni N-glycoproteins. N-glycosylation of AcrA by the eukaryotic OST in Saccharomyces cerevisiae occurred independent of the acidic residue at the -2 position. Thus, bacterial N-glycosylation site selection is more specific than the eukaryotic equivalent with respect to the polypeptide acceptor sequence.

SUBMITTER: Kowarik M 

PROVIDER: S-EPMC1456941 | biostudies-literature | 2006 May

REPOSITORIES: biostudies-literature

altmetric image

Publications


The Campylobacter jejuni pgl locus encodes an N-linked protein glycosylation machinery that can be functionally transferred into Escherichia coli. In this system, we analyzed the elements in the C. jejuni N-glycoprotein AcrA required for accepting an N-glycan. We found that the eukaryotic primary consensus sequence for N-glycosylation is N terminally extended to D/E-Y-N-X-S/T (Y, X not equalP) for recognition by the bacterial oligosaccharyltransferase (OST) PglB. However, not all consensus seque  ...[more]

Similar Datasets

| S-EPMC4372077 | biostudies-literature
| S-EPMC4894442 | biostudies-literature
| S-EPMC107149 | biostudies-literature
| S-EPMC7034376 | biostudies-literature
| S-EPMC6314510 | biostudies-literature
| S-EPMC4087075 | biostudies-literature
| S-EPMC9996094 | biostudies-literature
| S-EPMC6398215 | biostudies-literature
| S-EPMC113249 | biostudies-literature
| S-EPMC9561416 | biostudies-literature