PMID- 15288930 OWN - NLM STAT- MEDLINE DCOM- 20041021 LR - 20141120 IS - 0378-1135 (Print) IS - 0378-1135 (Linking) VI - 102 IP - 1-2 DP - 2004 Aug 19 TI - Cloning and purification of the Streptococcus suis serotype 2 glyceraldehyde-3-phosphate dehydrogenase and its involvement as an adhesin. PG - 87-94 AB - Streptococcus suis serotype 2 is a swine pathogen responsible for diverse diseases and may be present in the tonsils of pigs which show no sign of illness. Because adhesion to host cells may be important in the carrier state, this study was undertaken to characterize a 39 kDa surface protein identified as a glyceraldehyde-3-phosphate dehydrogenase (GAPDH), possibly implicated in the adhesion of the bacteria. The gene encoding for the GAPDH of S. suis was cloned and sequenced. The DNA sequence contained an open reading frame encoding for a 336 amino acid polypeptide exhibiting 95% sequence identity with the GAPDH from Streptococcus pyogenes and from other streptococci. Using the Qiaexpress expression plasmids, the gapdh gene was inducibly overexpressed in E. coli to produce GAPDH with a hexahistidyl N-terminus to permit its purification. The (His)6GAPDH protein was found to possess functional GAPDH enzymatic activity after the purification. An adherence assay with S. suis and porcine tracheal rings pre-incubated with (His)6GAPDH and non-incubated rings was showed a significant reduction in the adhesion of S. suis in the (His)6GAPDH pre-incubated rings compared to the non-incubated rings. The GAPDH protein of S. suis seems to be involved in the first steps of the bacterial adhesion to host cells. FAU - Brassard, Julie AU - Brassard J AD - GREMIP, Departement de Pathologie et Microbiologie, Faculte de medecine veterinaire, Universite de Montreal, CP 5000, Saint-Hyacinthe, Quebec, Canada J2S 7C6. FAU - Gottschalk, Marcelo AU - Gottschalk M FAU - Quessy, Sylvain AU - Quessy S LA - eng PT - Journal Article PL - Netherlands TA - Vet Microbiol JT - Veterinary microbiology JID - 7705469 RN - 0 (DNA, Bacterial) RN - 0 (Recombinant Proteins) RN - EC 1.2.1.9 (Glyceraldehyde 3-Phosphate Dehydrogenase (NADP+)) SB - IM MH - Amino Acid Sequence MH - Animals MH - Bacterial Adhesion/*physiology MH - Base Sequence MH - Chromatography, Affinity/veterinary MH - Cloning, Molecular MH - DNA, Bacterial/chemistry/genetics MH - Electrophoresis, Polyacrylamide Gel/veterinary MH - Glyceraldehyde 3-Phosphate Dehydrogenase (NADP+)/*genetics/isolation & purification/*pharmacology MH - In Vitro Techniques MH - Molecular Sequence Data MH - Polymerase Chain Reaction/veterinary MH - Recombinant Proteins/genetics/isolation & purification MH - Sequence Alignment MH - Streptococcal Infections/microbiology/*veterinary MH - Streptococcus suis/*enzymology/genetics MH - Swine MH - Swine Diseases/*microbiology MH - Trachea/*microbiology EDAT- 2004/08/04 05:00 MHDA- 2004/10/22 09:00 CRDT- 2004/08/04 05:00 PHST- 2003/08/04 00:00 [received] PHST- 2004/05/13 00:00 [revised] PHST- 2004/05/14 00:00 [accepted] PHST- 2004/08/04 05:00 [pubmed] PHST- 2004/10/22 09:00 [medline] PHST- 2004/08/04 05:00 [entrez] AID - S0378113504002068 [pii] AID - 10.1016/j.vetmic.2004.05.008 [doi] PST - ppublish SO - Vet Microbiol. 2004 Aug 19;102(1-2):87-94. doi: 10.1016/j.vetmic.2004.05.008.