A Novel Monoclonal Antibody Against a Synthetic Peptide from β-Actin can React with its Corresponding Protein
2014
Actin is one of the most widely studied structural and multifunctional housekeeping proteins
in eukaryotic cells with important roles in many cell functions. Antibodies against β-actin and
other housekeeping gene-encoded proteins are used as internal loading controls in Western blot analyses.
The aim of this study was to produce a monoclonal antibody (mAb) against a synthetic peptide
derived from N-terminal region of β-actin and to study its reactivity with different organisms. A synthetic peptide, derived
from β-actin, was designed and used to produce a mAb by hybridoma technology. The produced antibody (clone 4E5-
A10) was purified by an affinity chromatography column followed by characterization of purified mAb using SDS-PAGE,
ELISA and Western blot. Our results showed that 4E5-A10 was an IgM and had desired purity and excellent reactivity
with the immunizing peptide with an affinity constant of 2.7x10 8 M -1 >. It could detect a band of about 45 kDa, corresponding
to β-actin, in Western blot. Furthermore, it could react in a more sensitive manner and with a wider range of organisms
than a known commercial anti β-actin antibody. Our data suggest that 4E5-A10 can act as a sensitive probe for detection
of β-actin as an internal loading control, for a wide range of organisms, in Western blot analyses.
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