Key features and details | |
Cat. No. | MABL-3432 |
Name | Anti-Softag 1 mAbs [NT73](MABL-3433) |
Clone No. | NT73 |
From | Recombinant Antibody |
Isotype | Engineer antibody |
Application | WB, ELISA |
Species Reactivity | E.coli |
Basic Information | |
Specificity | This antibody recognizes and binds an epitope located at the C terminus of beta subunit of the Escherichia coli RNA polymerase. It specifically binds a 13-amino-acid long sequence 'SLAELLNAGLGGS'. |
Alternative Name | rpoC; tabB; epitope tag (SLAELLNAGLGGS); DNA-directed RNA polymerase subunit beta, RNAP subunit beta, RNA polymerase subunit beta, Transcriptase subunit beta |
UniProt | P0A8T7 |
Immunogen | |
Application Notes | This antibody was initially generated for purification of Escherichia coli RNA polymerase because of its ability to release the RNA polymerase in the presence of a low molecular weight polyhydroxylated compound (polyol) and a non-chaotropic salt. Such antibodies were termed as "polyol responsive" MAbs. Using NT73 conjugated to Sepharose, highly active RNA polymerase could be prepared rapidly by a single immunoaffinity chromatography step, replacing two lengthy chromatographic steps in the conventional purification procedure. The polyol-responsiveness of the antibody was determined by an ELISA-elution assay (PMID: 1637835). Later on the epitope of the abtibody was recognized and found to be a 13-amino-acid sequence 'SLAELLNAGLGGS' which was converted to an epitope tag that can be fused to a protein of interest for use as a purification tag. This epitope tag called 'Softag1' was fused to either the N or the C terminus of the green fluorescent protein. These tagged proteins were expressed in E. coli, and the tagged proteins were purified from the soluble fraction by a single-step immunoaffinity chromatography procedure. |
Antibody First Published | Thompson et al. Isolation and characterization of a polyol-responsive monoclonal antibody useful for gentle purification of Escherichia coli RNA polymerase. Biochemistry (1992); 31(30):7003-8.PMID:1637835 |
Note on publication | Describes the generation and characterization of the antibody. |
COA Information （For reference only, actual COA shall prevail） | |
Size | 100 μg Purified antibody. |
Concentration | 1 mg/ml. |
Purification | Protein A affinity purified |
Buffer | PBS with 0.02% Proclin 300. |
Concentration | 1 mg/ml. |
Storage Recommendation | Store at 4⁰C for up to 3 months. For longer storage, aliquot and store at - 20⁰C. |
