United Kingdom (UK)
Recombinant monoclonal antibody to 1-pHis. Manufactured using AbAb’s Recombinant Platform with variable regions (i.e. specificity) from the hybridoma SC1-1.
Alternative Name(s) of Target: 1-phosphohistidine; N1-Phosphohistidine; histidine
Immunogen: The original rabbit version of this antibody was raised by immunizing rabbits with a 1-pTza library conjugated to the carrier protein keyhole limpet hemocyanin (KLH).
Specificity: This antibody is specific for 1-pHis and does not cross react with phosphotyrosine (pTyr) or the other pHis isomers.
Application Notes: This antibody can be used for the identification of 1-pHis substrates and functional study of pHis. It was used to assess pHis levels in lysates of various cell lines, such as HPDE6 and pancreatic cancer, FLAG-NME1 293, HeLa, C2C12, and NME1- and NME2-overexpressing (OE) melanoma cell lines via Western blot (Fuhs et al, 2015; pmid: 26140597). A dot blot was also preformed on rabbit antisera, the 1-pTza, 3-pTza peptide libraries, His control library and a pTyr peptide with this antibody demonstrating the antibody's specificity to 1-pHis (Fuhs et al, 2015; pmid:26140597). Phosphorylation of H118 on NDPK-B was assessed as well by immunoblotting with this antibody (Panda et al, 2016; pmid:27453048). SC1-1 was further used to identify the intracellular location of pHis in HeLa cells via immunofluorescence. This clone was shown to be useful for studies on the acidic acidic compartments (i.e., phagosomes, autophagosomes, and lysosomes) since staining is absent from the interior of these acidic compartments and often very bright in the surrounding regions (Fuhs et al, 2015; pmid:26140597). Another group detected 1-pHis in SK-N-SH cells by immunofluorescence staining with this antibody (Adam et al, 2020; pmid:32392889). Furthermore, immunoaffinity purification (IAP) columns, containing protein A crosslinked with this antibody. The samples used were SK-N-BE(2) xenograft tumors from mice (Adam et al, 2020; pmid:32392889). Finally, this clone was also utilized to immunoprecipitate proteins extracted from 10 × 106 SK-N-BE(2) and SK-N-AS neuroblastoma cells (Adam et al, 2020; pmid:32392889).
Antibody first published in:
Fuhs et al. Monoclonal 1- and 3-Phosphohistidine Antibodies: New Tools to Study Histidine Phosphorylation Cell. 2015 Jul 2; 162(1): 198–210. PMID:26140597
Note on publication:
Describes the generation and characterization of the monoclonal antibodies (mAbs) that specifically recognize 1-pHis or 3-pHis.