A native structure containing the major 60-kilodalton common antigen polypeptide (designated TpN60) was isolated from Treponema pallidum subsp. pallidum (Nichols strain) through a combination of differential centrifugation and sucrose density gradient sedimentation. Gel filtration chromatography indicated that this structure is a high-molecular-weight homo-oligomer of TpN60. Antisera to TpN60 reacted with the groEL polypeptide of Escherichia coli, as determined by immunoperoxidase staining of two-dimensional electroblots. Electron microscopy of the isolated complex revealed a ringlike structure with a diameter of approximately 16 nm which was very similar in appearance to the groEL protein. Comparison of the N-terminal amino acid sequence of TpN60 with the deduced sequences of the E. coli groEL protein, related chaperonin proteins from mycobacteria and Coxiella burnetti, the hsp60 protein of Saccharomyces cerevisiae, the wheat ribulose bisphosphate carboxylase-oxygenase-subunit-binding protein (alpha subunit), and the human P1 mitochondrial protein indicated sequence identity at 8 of 22 to 10 of 22 residues (36 to 45% identity). We conclude that the oligomer of TpN60 is homologous to the groEL protein and related chaperonins found in a wide variety of procaryotes and eucaryotes and thus may represent a heat shock protein involved in protein folding and assembly.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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