Product Details

Purity

>85% (SDS-PAGE)

Target Names

ffh

Uniprot No.

P0AGD7

Alternative Names

ffh; b2610; JW5414; Signal recognition particle protein; Fifty-four homolog; Ffh; p48

Species

Escherichia coli (strain K12)

Expression Region

1-453

Target Protein Sequence

MFDNLTDRLS RTLRNISGRG RLTEDNVKDT LREVRMALLE ADVALPVVRE FINRVKEKAV GHEVNKSLTP GQEFVKIVRN ELVAAMGEEN QTLNLAAQPP AVVLMAGLQG AGKTTSVGKL GKFLREKHKK KVLVVSADVY RPAAIKQLET LAEQVGVDFF PSDVGQKPVD IVNAALKEAK LKFYDVLLVD TAGRLHVDEA MMDEIKQVHA SINPVETLFV VDAMTGQDAA NTAKAFNEAL PLTGVVLTKV DGDARGGAAL SIRHITGKPI KFLGVGEKTE ALEPFHPDRI ASRILGMGDV LSLIEDIESK VDRAQAEKLA SKLKKGDGFD LNDFLEQLRQ MKNMGGMASL MGKLPGMGQI PDNVKSQMDD KVLVRMEAII NSMTMKERAK PEIIKGSRKR RIAAGCGMQV QDVNRLLKQF DDMQRMMKKM KKGGMAKMMR SMKGMMPPGF PGR

Protein Length

full length 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 targeting and insertion of nascent membrane proteins into the cytoplasmic membrane. Binds to the hydrophobic signal sequence of the ribosome-nascent chain (RNC) as it emerges from the ribosomes. The SRP-RNC complex is then targeted to the cytoplasmic membrane where it interacts with the SRP receptor FtsY. Interaction with FtsY leads to the transfer of the RNC complex to the Sec translocase for insertion into the membrane, the hydrolysis of GTP by both Ffh and FtsY, and the dissociation of the SRP-FtsY complex into the individual components.

Gene References into Functions

Here, theauthors show that the C-terminal helix of the signal-sequence-binding domain of signal recognition particle penetrates into the ribosomal tunnel and contacts the intra-tunnel loop of ribosomal protein uL23. PMID: 28134917
The kinetic analysis indicate that, at cellular concentrations of ribosomes and signal recognition particle (SRP), signal-anchor sequence (SAS) rapidly binds to translating ribosomes prior to the emergence of an SAS and forms an initial complex that rapidly rearranges to a more stable engaged complex. PMID: 29149347
Data indicate that the sigma factor 32 (sigma32)-Ffh (the protein subunit of signal recognition particle (SRP) interaction was significantly affected by mutations in this region that compromise the feedback regulation. PMID: 27052372
The cryo-electron microscopy structure of this 'false' early complex with EspP revealed an ordered M domain of SRP protein Ffh making two ribosomal contacts, and the NG domains of Ffh and FtsY forming a distorted, flexible heterodimer. PMID: 23563142
Data indicate that Escherichia coli Ffh protein bound to the large subunit of mitochondrial ribosomes, and could relieve, to some degree, the defect of Saccharomyces cerevisiae Oxa1 mutants. PMID: 23198851
Overexpression the M domain of Ffh inhibits the expression of membrane proteins. PMID: 20714446
crystal structure of the SRP:SR complex at 3.9 angstrom resolution and biochemical data revealing that the activated SRP:SR GTPase complex binds the distal end of the SRP hairpin RNA where GTP hydrolysis is stimulated PMID: 21330537
Results suggest that indeed, while FtsY-depletion affects earlier steps in the pathway (possibly translation), Ffh-depletion disrupts membrane protein biogenesis later during the targeting pathway by preventing their functional assembly in the membrane. PMID: 20161748
MsrA and MsrB are required to repair Ffh oxidized by reactive oxygen species produced by aerobic metabolism, establishing an as-yet undescribed link between protein targeting and oxidation PMID: 15057280
Ffh and FtsY form a complex in which both proteins reciprocally activate the GTPase reaction of one another PMID: 15383838
In free Ffh, the binding sites for 4.5S RNA and FtsY are occluded by strong domain-domain interactions. PMID: 15923378
FRET analysis of conformation of signal recognition particle protein Ffh from Escherichia coli PMID: 16005894
The signal recognition particle (SRP) RNA may coordinate the interaction of the SRP and the SRP receptor with ribosome recruitment and transfer to the translocon, explaining why the SRP RNA is an indispensable component of the protein targeting machinery. PMID: 17507650
the SRP and SR GTPases, without recruiting external regulatory factors, constitute a self-sufficient system that provides exquisite spatial and temporal control of a complex cellular process PMID: 19174514

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Subcellular Location

Cytoplasm. Note=The SRP-RNC complex is targeted to the cytoplasmic membrane.

Protein Families

GTP-binding SRP family, SRP54 subfamily

Database Links

KEGG: ecj:JW5414

STRING: 316385.ECDH10B_2777

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Recombinant Escherichia coli Signal recognition particle protein (ffh)

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