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PLY Protein, Streptococcus pneumoniae serotype 4 (N-His)

Cat. No.: HY-P72057A
COA Handling Instructions

The PLY protein, a cholesterol-dependent toxin, induces cytolysis by forming pores in host membranes with a significant conformational change and oligomeric pore complex formation. Cholesterol is crucial for binding, insertion, and pore formation. PLY Protein, Streptococcus pneumoniae serotype 4 (N-His) is the recombinant PLY protein, expressed by E. coli , with N-His labeled tag. The total length of PLY Protein, Streptococcus pneumoniae serotype 4 (N-His) is 470 a.a., with molecular weight of ~55 kDa.

For research use only. We do not sell to patients.

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Description

The PLY protein, a cholesterol-dependent toxin, induces cytolysis by forming pores in host membranes with a significant conformational change and oligomeric pore complex formation. Cholesterol is crucial for binding, insertion, and pore formation. PLY Protein, Streptococcus pneumoniae serotype 4 (N-His) is the recombinant PLY protein, expressed by E. coli , with N-His labeled tag. The total length of PLY Protein, Streptococcus pneumoniae serotype 4 (N-His) is 470 a.a., with molecular weight of ~55 kDa.

Background

The PLY protein operates as a cholesterol-dependent toxin, inducing cytolysis by forming pores in host membranes containing cholesterol. Following its binding to target membranes, the protein undergoes a significant conformational change, facilitating its insertion into the host membrane and the subsequent formation of an oligomeric pore complex. The presence of cholesterol is crucial for various stages of this process, including binding to host membranes, membrane insertion, and pore formation, with cholesterol binding mediated by a Thr-Leu pair in the C-terminus. Notably, PLY protein exhibits reversibility and can be inactivated by oxidation. The resulting homooligomeric pore complex, comprising 35 to 50 subunits, is formed upon insertion into the host membrane, contributing to the protein's cytolytic activity.

Species

Others

Source

E. coli

Tag

N-His

Accession

P0C2J9 (A2-D471)

Gene ID

/

Molecular Construction
N-term
His
PLY (A2-D471)
Accession # P0C2J9
C-term
Synonyms
ply; SP_1923; Pneumolysin; Ply; Thiol-activated cytolysin
AA Sequence

ANKAVNDFILAMNYDKKKLLTHQGESIENRFIKEGNQLPDEFVVIERKKRSLSTNTSDISVTATNDSRLYPGALLVVDETLLENNPTLLAVDRAPMTYSIDLPGLASSDSFLQVEDPSNSSVRGAVNDLLAKWHQDYGQVNNVPARMQYEKITAHSMEQLKVKFGSDFEKTGNSLDIDFNSVHSGEKQIQIVNFKQIYYTVSVDAVKNPGDVFQDTVTVEDLKQRGISAERPLVYISSVAYGRQVYLKLETTSKSDEVEAAFEALIKGVKVAPQTEWKQILDNTEVKAVILGGDPSSGARVVTGKVDMVEDLIQEGSRFTADHPGLPISYTTSFLRDNVVATFQNSTDYVETKVTAYRNGDLLLDHSGAYVAQYYITWNELSYDHQGKEVLTPKAWDRNGQDLTAHFTTSIPLKGNVRNLSVKIRECTGLAWEWWRTVYEKTDLPLVRKRTISIWGTTLYPQVEDKVEND

Molecular Weight

Approximately 55 kDa

Purity

Greater than 95% as determined by reducing SDS-PAGE.

Appearance

Lyophilized powder.

Formulation

Lyophilized from a 0.22 μm filtered solution of 50 mM Tris-HCL, 300 mM NaCl, pH 7.4, 5% trehalose, 5% mannitol and 0.01% Tween80.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For lower concentration, please reconstitute in 50 mM Tris-HCL,300 mM NaCl, pH 7.4 buffer.

Storage & Stability

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation

PLY Protein, Streptococcus pneumoniae serotype 4 (N-His) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

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The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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Product Name:
PLY Protein, Streptococcus pneumoniae serotype 4 (N-His)
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HY-P72057A
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