title: 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).
abstract: 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.
authors.affiliation: The Division of Allergy and Clinical Immunology, Asthma and Allergy Center, The Johns Hopkins School of Medicine, 5501 Hopkins Bayview Circle, Baltimore, MD 21224, USA.
authors.forename: Jacqueline M
authors.initials: JM
authors.lastname: Langdon
authors.forename: Becky M
authors.initials: BM
authors.lastname: Vonakis
authors.forename: Susan M
authors.initials: SM
authors.lastname: MacDonald
mesh_terms: D014408:Biomarkers, Tumor / Q000235:genetics / Q000378:metabolism*; D045744:Cell Line, Tumor; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D015977:Eukaryotic Initiation Factor-1 / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D019169:Jurkat Cells; D020648:Peptide Elongation Factor 1 / Q000235:genetics*; D011994:Recombinant Proteins / Q000378:metabolism; D000090324:Tumor Protein, Translationally-Controlled 1
chemical_list: D014408:Biomarkers, Tumor; D018076:DNA, Complementary; D015977:Eukaryotic Initiation Factor-1; D020648:Peptide Elongation Factor 1; D011994:Recombinant Proteins; C000715647:TPT1 protein, human; D000090324:Tumor Protein, Translationally-Controlled 1