TY - JOUR
T1 - Cloning and sequencing of the gene that codes for the Klebsiella pneumoniae GroEL-like protein associated with ankylosing spondylitis
AU - Cancino-Díaz, Mario
AU - Curiel-Quesada, Everardo
AU - García-Latorre, Ethel
AU - Jiménez-Zamudio, Luis
N1 - Funding Information:
This work was supported in part from a grant from CONACYT (1633M-P) and from DEPI (952443). M. Cancino-Díaz had a doctoral scholarship from CON-ACYT and PIFI-IPN. M. Cancino-Díaz, E. Curiel-Quesada, E. García-Latorre and L. Jiménez-Zamudio are fellows of COFAA-IPN. The authors are grateful to L. Lindler from the Walter Reed Army Institute for the donation of the pStGroEL plasmid and to Beatriz Jiménez, Guillermo Corona and Luis Herrera-Estrella from CINVESTAV-Irapuato for their help in sequencing the gene.
PY - 1998/7
Y1 - 1998/7
N2 - Ankylosing spondylitis (AS) is a chronic inflammatory disease of the sacroiliac joints and vertebral column of unknown aetiology, but strongly related to the presence of the HLA-B27 antigen. The participation of bacterial infections as triggering factors have also been suggested. We have associated the 60 kDa heat shock protein of Klebsiella pneumoniae (HSP60Kp) with AS since we have previously demonstrated that most of the patients have IgG antibodies and active T cells that recognize preferentially this protein, but we have not yet identified the epitopes involved in the recognition. In order to know the amino acid sequence of HSP60Kp, and to be able to analyse in the future the relevant epitopes, we amplified by PCR and cloned the gene coding for this protein into the SmaI site of pUC19. The nucleotide sequence of the gene was obtained by the Sanger method using both manual and automatic techniques. Amino acid sequence of the HSP60Kp was deduced by translating the nucleotide sequence of the gene. The antigenic analysis of this sequence was compared to the antigenic analysis of the reported sequences of Escherichia coli GroEL and Yersinia enterocolitica HSP60. Using a software to predict HLA class I motifs, the nonapeptide (KRGIDKAVL) residues 117-125 of HSP60Kp showed a much higher affinity for HLA-B27 than the similar nonapeptide of E. coli GroEL and Y. enterocolitica HSP60. The only difference between the three peptides was in position nine. This finding could explain the association of AS only with the HSP60 of Klebsiella pneumoniae. On the other hand, hydrophilicity analysis, which indicates B cell epitopes, showed three similar strongly antigenic regions in the three proteins.
AB - Ankylosing spondylitis (AS) is a chronic inflammatory disease of the sacroiliac joints and vertebral column of unknown aetiology, but strongly related to the presence of the HLA-B27 antigen. The participation of bacterial infections as triggering factors have also been suggested. We have associated the 60 kDa heat shock protein of Klebsiella pneumoniae (HSP60Kp) with AS since we have previously demonstrated that most of the patients have IgG antibodies and active T cells that recognize preferentially this protein, but we have not yet identified the epitopes involved in the recognition. In order to know the amino acid sequence of HSP60Kp, and to be able to analyse in the future the relevant epitopes, we amplified by PCR and cloned the gene coding for this protein into the SmaI site of pUC19. The nucleotide sequence of the gene was obtained by the Sanger method using both manual and automatic techniques. Amino acid sequence of the HSP60Kp was deduced by translating the nucleotide sequence of the gene. The antigenic analysis of this sequence was compared to the antigenic analysis of the reported sequences of Escherichia coli GroEL and Yersinia enterocolitica HSP60. Using a software to predict HLA class I motifs, the nonapeptide (KRGIDKAVL) residues 117-125 of HSP60Kp showed a much higher affinity for HLA-B27 than the similar nonapeptide of E. coli GroEL and Y. enterocolitica HSP60. The only difference between the three peptides was in position nine. This finding could explain the association of AS only with the HSP60 of Klebsiella pneumoniae. On the other hand, hydrophilicity analysis, which indicates B cell epitopes, showed three similar strongly antigenic regions in the three proteins.
KW - Ankylosing spondylitis
KW - GroEL
KW - Heat shock protein
KW - Klebsiella pneumoniae
KW - Nucleotide sequence
UR - http://www.scopus.com/inward/record.url?scp=0031928092&partnerID=8YFLogxK
U2 - 10.1006/mpat.1998.0210
DO - 10.1006/mpat.1998.0210
M3 - Artículo
SN - 0882-4010
VL - 25
SP - 23
EP - 32
JO - Microbial Pathogenesis
JF - Microbial Pathogenesis
IS - 1
ER -