Open AccessHeat shock protein 60 (GroEL) from Porphyromonas gingivalis : Molecular cloning and sequence analysis of its gene and purification of the recombinant protein
Author(s) -
Maeda H.,
Miyamoto M.,
Hongyo H.,
Nagai A.,
Kurihara H.,
Murayama Y.
Publication year - 1994
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1994.tb06879.x
Subject(s) - groel , groes , orfs , biology , hsp60 , microbiology and biotechnology , porphyromonas gingivalis , heat shock protein , molecular cloning , escherichia coli , open reading frame , peptide sequence , gene , biochemistry , genetics , hsp70 , bacteria
Porphyromonas gingivalis is associated with human periodontal disease. We cloned and sequenced the gene for heat shock protein 60 (GroEL, HSP60) from P. gingivalis FDC381. The identified clone carried a 2.6 kb DNA fragment which contained two open reading frames (ORFs) encoding a 9.6‐ and a 58.4‐kDa protein. The translated amino acid sequence of these ORFs showed a high degree of homology with known sequences for GroES and GroEL from several bacterial species and humans. Escherichia coli carrying this clone expressed a 65‐kDa protein which was recognized by anti‐ Mycobacterium leprae HSP60 monoclonal antibody. We purified the 65‐kDa protein by DEAE‐sepharose chromatography and hydroxyapatite chromatography. This protein was immunogenic and was recognized by sera from a number of patients with periodontal disease. This immunological reactivity and the existence of molecular mimicry between the P. gingivalis GroEL and other HSP homologs may indicate an important role for this molecule in periodontal lesion.