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United States Department of Agriculture

Agricultural Research Service

Research Project: MOLECULAR BIOLOGY AND GENOMICS OF FOODBORNE PATHOGENS

Location: Produce Safety and Microbiology Research

Title: Beyond gangliosides: Multiple forms of glycan mimicry exhibited by Campylobacter jejuni in its lipooligosaccharide (LOS)

Authors
item Houliston, R -
item Vinogradov, E -
item Li, J -
item Dzieciatkowska, M -
item ST.MICHAEL, F -
item Karwaski, M -
item Brochu, D -
item Jarrell, H -
item PARKER, CRAIG
item Yuki, N -
item Mandrell, Robert
item Gilbert, M -

Submitted to: Journal of Biological Chemistry
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: November 1, 2010
Publication Date: January 21, 2011
Repository URL: http://www.ncbi.nlm.nih.gov/pubmed/21257763 DOI: M10.181750[pii]10.1074/jbc.M110.19750
Citation: Houliston, R.S., Vinogradov, E., Li, J., Dzieciatkowska, M., St.Michael, F., Karwaski, M., Brochu, D., Jarrell, H.C., Parker, C., Yuki, N., Mandrell, R.E., Gilbert, M.E. 2011. Beyond gangliosides: Multiple forms of glycan mimicry exhibited by Campylobacter jejuni in its lipooligosaccharide (LOS). Journal of Biological Chemistry. 286:12361-12370.

Interpretive Summary: The food-borne pathogen Campylobacter jejuni is well known for exhibiting ganglioside mimics as part of their surface called lipooligosaccharide (LOS), which have been implicated in triggering the neurologically debilitating Guillain-Barré syndrome (GBS). We now confirm that this pathogen is also capable of synthesizing a much broader spectrum of human glycolipid/glycoprotein mimics within its LOS. P-blood group and paragloboside (lacto-N-neotetraose) antigen mimicry is exhibited by RM1221, a strain isolated from a poultry source. RM1503, also a gastroenteritis-associated strain, expresses lacto-N-biose and sialyl-Lewis c units, the latter known as the pancreatic tumor-associated antigen, DU-PAN-2 (or LSTa). C. jejuni GC149, a GBS-associated strain, expresses an unusual sialic acid-containing hybrid oligosaccharide with similarity to both ganglio and Pk antigens and can, through phase variation of its LOS biosynthesis genes, display GT1a or GD3 ganglioside mimics. We have identified glycosyltransferases involved in the synthesis of multiple mimic types, with LOS structural diversity achieved through evolving allelic substrate specificity.

Technical Abstract: Campylobacter jejuni is well known for synthesizing ganglioside mimics within the glycan component of its lipooligosaccharide (LOS), which have been implicated in triggering Guillain-Barré syndrome (GBS). We now confirm that this pathogen is capable of synthesizing a much broader spectrum of host glycolipid/glycoprotein mimics within its LOS. P-blood group and paragloboside (lacto-N-neotetraose) antigen mimicry is exhibited by RM1221, a strain isolated from a poultry source. RM1503, also a gastroenteritis-associated strain, expresses lacto-N-biose and sialyl-Lewis c units, the latter known as the pancreatic tumor-associated antigen, DU-PAN-2 (or LSTa). C. jejuni GC149, a GBS-associated strain, expresses an unusual sialic acid-containing hybrid oligosaccharide with similarity to both ganglio and Pk antigens and can, through phase variation of its LOS biosynthesis genes, display GT1a or GD3 ganglioside mimics. We have identified glycosyltransferases involved in the synthesis of multiple mimic types, with LOS structural diversity achieved through evolving allelic substrate specificity.

Last Modified: 8/27/2014
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