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Mol Cell Biol January 1, 1988; 8 (1): 371-80.

A highly evolutionarily conserved mitochondrial protein is structurally related to the protein encoded by the Escherichia coli groEL gene.

McMullin TW , Hallberg RL .

We recently reported that a Tetrahymena thermophila 58-kilodalton (kDa) mitochondrial protein (hsp58) was selectively synthesized during heat shock. In this study, we show that hsp58 displayed antigenic similarity with mitochondrially associated proteins from Saccharomyces cerevisiae (64 kDa), Xenopus laevis (60 kDa), Zea mays (62 kDa), and human cells (59 kDa). Furthermore, a 58-kDa protein from Escherichia coli also exhibited antigenic cross-reactivity to an antiserum directed against the T. thermophila mitochondrial protein. The proteins from S. cerevisiae and E. coli antigenically related to hsp58 were studied in detail and found to share several other characteristics with hsp58, including heat inducibility and the property of associating into distinct oligomeric complexes. The T. thermophila, S. cerevisiae, and E. coli macromolecular complexes containing these related proteins had similar sedimentation characteristics and virtually identical morphologies as seen with the electron microscope. The distinctive properties of the E. coli homolog to T. thermophila hsp58 indicate that it is most likely the product of the groEL gene.

PubMed ID: 2892128
PMC ID: PMC363133
Article link: Mol Cell Biol

Species referenced: Xenopus laevis
Genes referenced: hspd1

References [+] :
Bardwell, Major heat shock gene of Drosophila and the Escherichia coli heat-inducible dnaK gene are homologous. 1984, Pubmed