EF-Ts (elongation factor thermo stable) is one of the prokaryotic elongation factors. It is found in human mitochrondria as TSFM. It is similar to eukaryotic EF-1B. EF-Ts serves as the guanine nucleotide exchange factor for EF-Tu (elongation factor thermo unstable), catalyzing the release of guanosine diphosphate from EF-Tu. This enables EF-Tu to bind to a new guanosine triphosphate molecule, release EF-Ts, and go on to catalyze another aminoacyl tRNA addition. EF-Ts functions as guanine nucleotide exchange factor, it catalyzes the reaction of EF-Tu*GDP ( inactive form) to EF-Tu*GTP (active). EF-Tu (active) then delivers the aminoacyl-tRNA to the ribosome. Therefore, EF-Ts main role is recycling EF-Tu back to its active state in order to complete another elongation cycle.
Background References
1. Scala M. et. al. Novel homozygous TSFM pathogenic variant associated with encephalocardiomyopathy with sensorineural hearing loss and peculiar neuroradiologic findings. Neurogenetics. 2019 Aug
2. Traschütz A. et. al. TSFM mutations cause a complex hyperkinetic movement disorder with strong relief by cannabinoids. Parkinsonism Relat Disord. 2019 Mar
Immunohistochemical analysis of paraffin-embedded human kidney tissue with Rabbit anti-EF-Ts antibody (HA721059) at 1/100 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA721059) at 1/100 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Immunohistochemical analysis of paraffin-embedded mouse kidney tissue with Rabbit anti-EF-Ts antibody (HA721059) at 1/200 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA721059) at 1/200 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Western blot analysis of EF-Ts on different lysates with Rabbit anti-EF-Ts antibody (HA721059) at 1/5,000 dilution.
Lane 1: HeLa (Human cervical adenocarcinoma cell) cell lysate Lane 2: Mouse liver tissue lysate
Lysates/proteins at 15 µg/Lane. Exposure time: 43 seconds; ECL: K1801
Blocking: 5% NFDM/TBST, 1 hour at room temperature Primary antibody: HA721059, 1/5,000 in primary antibody dilution buffer (K1803), overnight at 4 ℃ Secondary antibody: Goat anti-Rabbit IgG-HRP (HA1001), 1/50,000 in 5% NFDM/TBST, 1 hour at room temperature
Predicted band size: 35 kDa Observed band size: 35 kDa
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