efp Antibody

Code CSB-PA358853ZA01ENV
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Product Details

Full Product Name
Rabbit anti-Escherichia coli (strain K12) efp Polyclonal antibody
Uniprot No.
Target Names
Alternative Names
efp antibody; b4147 antibody; JW4107Elongation factor P antibody; EF-P antibody
Raised in
Species Reactivity
Escherichia coli
Recombinant Escherichia coli efp protein
Immunogen Species
Escherichia coli (strain K12)
Purification Method
Protein A/G
It differs from different batches. Please contact us to confirm it.
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Tested Applications
ELISA, WB (ensure identification of antigen)
Troubleshooting and FAQs
Upon receipt, store at -20°C or -80°C. Avoid repeated freeze.
Value-added Deliverables
① 200ug * antigen (positive control);
② 1ml * Pre-immune serum (negative control);
Quality Guarantee
① Antibody purity can be guaranteed above 90% by SDS-PAGE detection;
② ELISA titer can be guaranteed 1: 64,000;
③ WB validation with antigen can be guaranteed positive;
Lead Time
Made-to-order (12-14 weeks)

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Target Background

Involved in peptide bond synthesis. Alleviates ribosome stalling that occurs when 3 or more consecutive Pro residues or the sequence PPG is present in a protein, possibly by augmenting the peptidyl transferase activity of the ribosome. Beta-lysylation at Lys-34 is required for alleviation. The Pro codons and their context do not affect activity; only consecutive Pro residues (not another amino acid) are affected by EF-P. Has stimulatory effects on peptide bond formation between ribosome-bound initiator tRNA(fMet) and puromycin, and N-acetyl-Phe tRNA(Phe)-primed poly(U)-directed poly(Phe) synthesis.
Gene References into Functions
  1. The activity of EF-P is controlled by recognition elements in the tRNA D-arm. PMID: 27216360
  2. study of the spatial distribution and ribosome-binding dynamics of EF-P in live E. coli cells; EF-P binds to and unbinds from translating ribosomes during at least 25% of all elongation events; it may bind during every elongation cycle PMID: 28588135
  3. Binding of EF-P stabilizes the P-site tRNA, particularly via interactions between its modification and the CCA end, thereby enforcing an alternative conformation of the polyproline-containing nascent chain, which allows a favorable substrate geometry for peptide bond formation. PMID: 29100052
  4. In the absence of EF-P, the presence of Rho utilization (rut) sites led to an ~30-fold decrease in translation of polyproline-encoding mRNAs. PMID: 27624127
  5. These findings indicate that the ability of a given PPX motif to initiate an EF-P-alleviated stall is strongly influenced by its local context. PMID: 25144653
  6. Authors demonstrate that EF-P is dispensable in Escherichia coli and Pseudomonas aeruginosa under laboratory growth conditions. PMID: 23591475
  7. Distinct XPPX sequence motifs induce ribosome stalling, which is rescued by the translation elongation factor EF-P. PMID: 24003132
  8. EF-P is an elongation factor that enhances translation of polyproline-containing proteins: In the absence of EF-P, ribosomes stall at polyproline stretches, whereas the presence of EF-P alleviates the translational stalling. PMID: 23239623
  9. EF-P and its eukaryotic homolog, eIF5A, are essential for the synthesis of a subset of proteins containing proline stretches in all cells. PMID: 23239624
  10. GenX-elongation factor P-lysyl adenylate analogue crystals belonged to the monoclinic space group P2(1), with unit-cell parameters a=105.93, b=102.96, c=119.94 A, beta=99.4 degrees, and diffracted to 2.5 A resolution PMID: 20823541
  11. reveal that the translation elongation factor P (EF-P) lysylation by GenX is enhanced by YjeK (lysine 2,3-aminomutase paralog) PMID: 20729861

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Subcellular Location
Protein Families
Elongation factor P family
Database Links
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