Z-domain of protein A scaffold protein anti-Human Her2 (CAT#: SZA-L222)
This Her2 specific binding protein (Z-domain of protein A) was investigated by an α-helix shuffling strategy. The primary scaffold protein was from a naive combinatorial library of the three-helix bundle Z domain derived from staphylococcal protein A. A hierarchical library was constructed through selective re-randomization of six amino acid positions in one of the two α-helices of the domain, making up the Taq DNA polymerase binding surface. After selections using monovalent phage display technology, second generation variants were identified having affinities (KD=22pM) for Her2 as determined by biosensor technology. It's potential to be used in diagnostic, research and therapeutic applications.
Specific Inquiry
Subcellular Location
Normal Tissue
RNA Expression
Figure 1 IF staining of human cell line U-251 MG
(Immunofluorescent staining of human cell line U-251 MG shows localization to plasma membrane.)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/1060/169_D12_1_selected.jpg
(Immunofluorescent staining of human cell line U-251 MG shows localization to plasma membrane.)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/1060/169_D12_1_selected.jpg
Figure 2 IF staining of human cell line A-431
(Immunofluorescent staining of human cell line A-431 shows localization to plasma membrane.)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/1338/if_selected.jpg
(Immunofluorescent staining of human cell line A-431 shows localization to plasma membrane.)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/1338/if_selected.jpg
Figure 3 High expression in esophagus
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/1383/4682_B_5_1_val_selected.jpg
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/1383/4682_B_5_1_val_selected.jpg
Figure 4 IHC staining of human rectum
(Immunohistochemical staining of human rectum shows weak cytoplasmic positivity in glandular cells.)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/43/ihc_selected.jpg
(Immunohistochemical staining of human rectum shows weak cytoplasmic positivity in glandular cells.)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/43/ihc_selected.jpg
Figure 5 IHC staining of human urinary bladder
(Immunohistochemical staining of human urinary bladder shows moderate cytoplasmic and membranous positivity in urothelial cells.)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/20416/ihc_selected.jpg
(Immunohistochemical staining of human urinary bladder shows moderate cytoplasmic and membranous positivity in urothelial cells.)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/20416/ihc_selected.jpg
Figure 6 Kidney
(Collecting ducts Staining: Low Intensity: Moderate Quantity: <25% Distal tubules Staining: Low Intensity: Moderate Quantity: <25%)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/43/1054_A_7_5.jpg
(Collecting ducts Staining: Low Intensity: Moderate Quantity: <25% Distal tubules Staining: Low Intensity: Moderate Quantity: <25%)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/43/1054_A_7_5.jpg
Figure 7 Breast
(Glandular cells Staining: Medium Intensity: Moderate Quantity: 75%-25% Location: Cytoplasmic/ membranous Myoepithelial cells Staining: Medium Intensity: Moderate Quantity: 75%-25% Location: Cytoplasmic/ membranous)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/20416/45831_B_3_4.jpg
(Glandular cells Staining: Medium Intensity: Moderate Quantity: 75%-25% Location: Cytoplasmic/ membranous Myoepithelial cells Staining: Medium Intensity: Moderate Quantity: 75%-25% Location: Cytoplasmic/ membranous)
* Image credit: Human Protein Atlas v21.proteinatlas.org/images/20416/45831_B_3_4.jpg
Figure 8 RNA cell line category: Group enriched (OE19, SK-BR-3)
(Cell lines ordered by descending RNA expression order)
* Image credit: Human Protein Atlas v21.proteinatlas.org/ENSG00000141736-ERBB2
(Cell lines ordered by descending RNA expression order)
* Image credit: Human Protein Atlas v21.proteinatlas.org/ENSG00000141736-ERBB2
Specifications
- Scaffold Name
- Z-domain of protein A
- Origin
- Staphylococcal protein A
- Core Structure
- 3-α helixes
- Variable Regions
- 13 Residues on first and second helix surface
- Target
- Her2
- Species Reactivity
- Human
- Expression Host
- E. coli
- Affinity Constant
- 22 pM
- Applications
- ELISA; IHC; Microscopy; FC; WB; FuncS
Target
- Alternative Names
- Staphylococcal protein A; Z-domain of protein A; NEU; NGL; HER2; TKR1; CD340; HER-2; MLN 19; HER-2/neu
- Gene ID
- 2064
- UniProt ID
- P04626
Related Resources
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