Calpain 8 peptide (Aminoterminal end domain I) (ab41353)

Product Name 

Calpain 8 peptide (Aminoterminal end domain I)

Product type 

Proteins and Peptides

Peptide 

This peptide was used as an immunogen for ab28214 - Calpain 8 antibody - Aminoterminal end domain I.

Specificity 

We have a range of domain specific antibodies for this target. For a full list please see all Calpain 8 antibodies

Tested applications 
(see key)

ELISA, WB

Application notes 
(see key)

Recommended dilutions
ELISA: Use at an assay dependent dilution. WB: Use at an assay dependent dilution. This peptide can be used with studies using ab28214. Dilution optimised using Chromogenic detection. Not yet tested in other applications. Optimal dilutions/concentrations should be determined by the end user.

Research areas 

Cell Biology >> Proteolysis / Ubiquitin >> Proteolytic enzymes >> Cysteine protease >> Calpains

Signal Transduction >> Signaling Pathway >> Calcium Signaling >> Calpain

Relevance 

Calpain proteinases are defined currently as papain like neutral proteases that are calcium activated. Calpains 1 and 2 are composed of a large subunit, which is proteolytically active, and a small subunit (also called calpain 4), or enhancer protein, that is not proteolytically active. The other calpain proteins identified to date are not known to require a small subunit, although there is evidence that the calpain small subunit #2 may act as a chaperonin in the folding of calpains, and then disassociate. Domains in the large subunit include the amino terminal domain I, the proteinase domain II, domain III, and the EF hand domain IV (Domain T in calpains 5 & 6).

Calpain 8, also known as NCL 2 (novel calpain 2), was originally characterized in rodents as a stomach specific protein, but the human sequence was isolated from leukocytes. Most similar to calpain 2 (60 % identical to rat or human sequences), murine calpain 8 is also known as a truncated form (Calpain NCL-2), lacking the calcium binding domain, and most of domain III. Homology between human calpain 8 and human calpain 9 (the human stomach specific calpain) is much lower; calpain 9 is more similar to calpain 3. Homology between rat, mouse and human calpain 8 is high. The large subunit of calpain 8 zymogen runs at approximately 80 Kd, and the amino terminal truncation at activation yields an approximately 60 kD form. Cleavage of the carboxyterminal region generates smaller forms of Calpain 8, but it is not clear if these forms are proteolytically active.

Purity 

>95% by SDS-PAGE

Storage buffer 

Preservative: None
Constituents: 0.001% Tween 20, 30mM HEPES, 2mM EDTA, 150mM Sodium chloride, pH 6.75

Form 

Liquid

Concentration 

1.000 mg/ml

Storage instructions 

Shipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.

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