Recombinant Escherichia coli O8 Acyl carrier protein (acpP)

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Description

Core Function of ACP in E. coli

ACP is a central component of fatty acid synthesis (FAS) in E. coli, serving as a scaffold for acyl chain elongation. It shuttles intermediates between enzymes (e.g., acetyl-CoA carboxylase, β-ketoacyl-ACP synthases) and facilitates interactions with regulatory proteins like SpoT, which modulate (p)ppGpp synthesis under stress .

Key Features of E. coli ACP

PropertyDescriptionSource
PhosphopantetheinylationPost-translational modification critical for acyl chain binding
Interaction NetworkBinds to SpoT, RelA, DHPS, and LpxD (lipid A biosynthesis)
Structural FlexibilityEngineering into multimeric constructs enhances functional versatility

O8 Serotype and O-Antigen Biosynthesis

The O8 serotype is defined by its mannose homopolymer O-antigen, synthesized via the ABC transporter pathway. This process involves conserved and serotype-specific mannosyltransferases (WbdC, WbdB, WbdA) .

While no studies explicitly target O8 acpP, recombinant ACPs from other species (e.g., Ralstonia, Pseudomonas) have been expressed in E. coli to study fatty acid or polyhydroxyalkanoate (PHA) synthesis .

Functional Complementation of E. coli acpP Mutants

ACP SourceHost StrainComplementation EfficiencyKey Observations
RalstoniaCY1877 (acpP−)Partial (AcpP1 only)AcpP1 supports growth; others fail
PseudomonasK1060 (LacIq)Successful PHB productionRequires strong promoters

Source:

Potential Links Between O8 and ACP

The O8 O-antigen and ACP pathways are distinct, but lipid A (synthesized via LpxD, which interacts with ACP ) and lipid-linked intermediates (e.g., undecaprenyl pyrophosphate) may intersect. For example:

  • Lipid A Synthesis: ACP interacts with LpxD, linking fatty acid synthesis to lipopolysaccharide (LPS) assembly .

  • Metabolic Burden: Recombinant protein expression (e.g., AAR, PHA synthases) impacts fatty acid pathways, as shown in E. coli M15 and DH5α strains .

Research Gaps and Future Directions

  1. O8-Specific ACP Engineering: No studies have targeted acpP from O8 strains. Potential applications include enhancing fatty acid derivatives for O-antigen or lipid A modifications.

  2. Synthetic Biology: Tandem ACP constructs (e.g., di- or tri-domain ACPs ) could improve substrate shuttling in O8 mutants.

  3. Stress Adaptation: ACP-SpoT interactions modulate (p)ppGpp levels under amino acid starvation , a mechanism exploitable in recombinant systems.

Product Specs

Form
Lyophilized powder. Note: We will preferentially ship the format we have in stock. If you have a specific format requirement, please note it when ordering, and we will fulfill your request.
Lead Time
Delivery times may vary depending on the purchase method and location. Please consult your local distributor for specific delivery times. Note: All proteins are shipped with standard blue ice packs by default. If you require dry ice shipping, please contact us in advance, as additional fees will apply.
Notes
Avoid repeated freezing and thawing. Working aliquots can be stored at 4°C for up to one week.
Reconstitution
Briefly centrifuge the vial before opening to collect the contents at the bottom. Reconstitute the protein in sterile deionized water to a concentration of 0.1-1.0 mg/mL. We recommend adding 5-50% glycerol (final concentration) and aliquoting for long-term storage at -20°C/-80°C. Our default final glycerol concentration is 50% for your reference.
Shelf Life
Shelf life depends on several factors, including storage conditions, buffer components, storage temperature, and protein stability. Generally, the liquid form has a shelf life of 6 months at -20°C/-80°C, while the lyophilized form has a shelf life of 12 months at -20°C/-80°C.
Storage Condition
Store at -20°C/-80°C upon receipt. Aliquot for multiple uses. Avoid repeated freeze-thaw cycles.
Tag Info
The tag type will be determined during the manufacturing process. If you have a specific tag type requirement, please inform us, and we will prioritize developing the specified tag.
Synonyms
acpP; ECIAI1_1129Acyl carrier protein; ACP
Buffer Before Lyophilization
Tris/PBS-based buffer, 6% Trehalose.
Datasheet
Please contact us to get it.
Expression Region
1-78
Protein Length
full length protein
Purity
>85% (SDS-PAGE)
Species
Escherichia coli O8 (strain IAI1)
Target Names
acpP
Target Protein Sequence
MSTIEERVKK IIGEQLGVKQ EEVTNNASFV EDLGADSLDT VELVMALEEE FDTEIPDEEA EKITTVQAAI DYINGHQA
Uniprot No.

Target Background

Function
This protein functions as the carrier of the growing fatty acid chain during fatty acid biosynthesis.
Database Links
Protein Families
Acyl carrier protein (ACP) family
Subcellular Location
Cytoplasm.

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