Cell Signaling Technology

Product Pathways - Lymphocyte Signaling

HS1 Antibody (Human Specific) #4503

Applications Reactivity Sensitivity MW (kDa) Source
W IP F H Endogenous 80 Rabbit

Applications Key:  W=Western Blotting  IP=Immunoprecipitation  F=Flow Cytometry
Reactivity Key:  H=Human
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

HS1 Antibody (Human Specific) detects endogenous levels of total HS1 protein. This antibody does not recognize mouse and rat HS1 proteins. HS1 has a calculated size of 54 kDa, but has an apparent molecular weight of 80 kDa on SDS-PAGE gels.

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Pro310 of human HS1. Antibodies are purified by peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of cell extracts from various cell types using HS1 Antibody (Human Specific).

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of Jurkat cells using HS1 Antibody (Human Specific) (blue) compared to a nonspecific negative control antibody (red).

Background

HS1 (HCLS1, LckBP1, p75) is a protein kinase substrate that is expressed only in tissues and cells of hematopoietic origin (1,2). HS1 contains four cortactin repeats and a single SH3 domain (2). This intracellular protein is phosphorylated following immune receptor activation, which promotes recruitment of HS1 to the immune synapse (3-5). Phosphorylation of HS1 is required to regulate actin dynamics and provide docking sites for many other signaling molecules, such as Vav1 and PLCγ1 (6). HS1 also plays an important role in platelet activation (7).

  1. Kitamura, D. et al. (1989) Nucleic Acids Res 17, 9367-79.
  2. Kitamura, D. et al. (1995) Biochem Biophys Res Commun 208, 1137-46.
  3. Suzuki, H. et al. (1997) J Immunol 159, 5881-8.
  4. Hata, D. et al. (1994) Immunol Lett 40, 65-71.
  5. Yamanashi, Y. et al. (1993) Proc Natl Acad Sci USA 90, 3631-5.
  6. Gomez, T.S. et al. (2006) Immunity 24, 741-52.
  7. Kahner, B.N. et al. (2007) Blood 110, 2449-56.

Application References

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Companion Products

For Research Use Only. Not For Use In Diagnostic Procedures.

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