Product Details

Purity

>85% (SDS-PAGE)

Target Names

efp

Uniprot No.

P0A6N4

Alternative Names

efp; b4147; JW4107Elongation factor P; EF-P

Species

Escherichia coli (strain K12)

Expression Region

2-188

Target Protein Sequence

ATYYSNDFR AGLKIMLDGE PYAVEASEFV KPGKGQAFAR VKLRRLLTGT RVEKTFKSTD SAEGADVVDM NLTYLYNDGE FWHFMNNETF EQLSADAKAI GDNAKWLLDQ AECIVTLWNG QPISVTPPNF VELEIVDTDP GLKGDTAGTG GKPATLSTGA VVKVPLFVQI GEVIKVDTRS GEYVSRVK

Protein Length

Full Length of Mature Protein

Tag Info

Tag type will be determined during the manufacturing process.

The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.

Form

Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.

Buffer before Lyophilization

Tris/PBS-based buffer, 6% Trehalose, pH 8.0

Reconstitution

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.

Troubleshooting and FAQs

Protein FAQs

Storage Condition

Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.

Shelf Life

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.

Lead Time

Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.

Notes

Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Datasheet

Please contact us to get it.

Target Background

Function

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

The activity of EF-P is controlled by recognition elements in the tRNA D-arm. PMID: 27216360
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
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
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
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
Authors demonstrate that EF-P is dispensable in Escherichia coli and Pseudomonas aeruginosa under laboratory growth conditions. PMID: 23591475
Distinct XPPX sequence motifs induce ribosome stalling, which is rescued by the translation elongation factor EF-P. PMID: 24003132
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
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
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
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

Cytoplasm.

Protein Families

Elongation factor P family

Database Links

KEGG: ecj:JW4107

STRING: 316385.ECDH10B_4340

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Code	CSB-EP358853ENV-B
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Recombinant Escherichia coli Elongation factor P (efp)

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