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Merck
CN

529625

Sigma-Aldrich

Polyphosphoinositide-Binding Peptide, PBP10

A Rhodamine-B-labeled decapeptide derived from the (PIP₂)-binding region in segment-2 of gelsolin.

Synonym(s):

Polyphosphoinositide-Binding Peptide, PBP10, RhoB-GS 160-169, Rhodamine B-QRLFQVKGRR-OH, RhoB-GS160-169, Rhodamine B-QRLFQVKGRR-OH

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About This Item

Empirical Formula (Hill Notation):
C84H127N24O15
CAS Number:
794466-45-8
Molecular Weight:
1713.06
MDL number:
MFCD00026695
UNSPSC Code:
12352211
NACRES:
NA.77

Key Documents

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Quality Level

100

Assay

≥95% (HPLC)

form

lyophilized solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
desiccated (hygroscopic)
protect from light

color

pink-red

solubility

DMSO: 2 mg/mL

fluorescence

λex 565 nm
λem 590 nm

shipped in

ambient

storage temp.

−20°C

General description

A Rhodamine-B-labeled decapeptide derived from the (PIP2)-binding region in segment-2 of gelsolin. Acts as a cell-permeable, reversible, and non-toxic agent that transiently disrupts actin filaments, which are essential for cell morphology and cell motility (~1-10 µM). Specifically binds to polyphosphoinositide (PPI) with high affinity and activates platelets without significantly affecting intracellular Ca2+ influx. Undergoes a reduction in fluorescence intensity upon binding to phosphatidylinositol 4,5-bisphosphate (PIP2) and lysophosphatidic acid; the fluorescence is not affected in the presence of phosphatidylserine and phosphatidylcholine. Useful fluorescent probe for the cellular localization and stabilization of PPIs. Excitation max.: ~565 nm; emission max.: ~590 nm.

Biochem/physiol Actions

Cell permeable: yes
Primary Target
Specifically binds to polyphosphoinositide (PPI)
Product does not compete with ATP.
Reversible: yes

Packaging

Packaged under inert gas

Physical form

Supplied as a trifluoroacetate salt.

Preparation Note

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 6 months at -20°C.

Other Notes

Bucki, R., et al. 2001. Biochemistry40, 15752
Cunningham, C.C., et al. 2001. J. Biol. Chem.276, 43390.
Rho-B-Gln-Arg-Leu-Phe-Gln-Val-Lys-Gly-Arg-Arg-OH

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Disclaimer

Toxicity: Standard Handling (A)

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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