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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Identification of the interaction between the human recombinant histamine releasing factor/translationally controlled tumor protein and elongation factor-1 delta (also known as eElongation factor-1B beta).

The human recombinant histamine releasing factor (HrHRF), also known as translationally controlled tumor protein (TCTP), p23 and fortilin, has been described to have both extra- and intracellular functions. To elucidate an extra- or intracellular role for HrHRF, we used the yeast two-hybrid system with HrHRF as the bait and a Jurkat T cell library. We isolated a partial cDNA clone of the human elongation factor-1 delta (EF-1delta) encoding for amino acids 12 to 281. This interaction was confirmed by co-immunoprecipitation experiments. Previously, both HrHRF and EF-1delta have been isolated and identified in association with malignancy in numerous studies. EF-1delta is part of the EF-1 complex responsible for kinetic proofreading in protein synthesis. Additionally, DNA microarray data classifies TCTP (HrHRF) as co-regulated with ribosomal proteins and recent structural analysis of TCTP (HrHRF) relates it to a guanine nucleotide-free chaperone. Our findings of an interaction between HrHRF and EF-1delta taken with some of the recently published information concerning the TCTP (HrHRF) mentioned above suggest a possible intracellular role for TCTP/HrHRF.[1]


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