EphA3 Protein Overview: Sequence, Structure, Function and Protein Interaction

EphA3 Protein Overview

EphA3 reagents

See EPH (EPHA1; 179610) for background on Eph receptors and their ligands, the ephrins. Kinases that phosphorylate proteins on tyrosine residues (protein tyrosine kinases; PTKs), such as EPHA3, form a structurally related group of molecules that exhibit functional diversity. Genetic alterations that lead to the inappropriate activation or expression of PTKs may be oncogenic. Many growth factor receptors are PTKs, e.g., the receptors for epidermal growth factor (EGFR; 131550), platelet-derived growth factor (PDGFR1, 173410; PDGFR2, 173490), colony-stimulating factor-1 (CSF1R; 164770), and stem cell growth factor (164920).

EphA3 protein family

Belongs to the protein kinase superfamily. Tyr protein kinase family. Ephrin receptor subfamily.

EphA3 protein name

Recommended name
Ephrin type-A receptor 3
Alternative name
EPH-like kinase 4 EK4 hEK4 HEK Human embryo kinase Tyrosine-protein kinase TYRO4 Tyrosine-protein kinase receptor ETK1 Eph-like tyrosine kinase 1

EphA3 Gene family protein

EphA3 Protein Sequence

Species Human EphA3 protein
Length 983
Mass (Da) 110131
Sequence Human EphA3 protein sequence
Species Mouse EphA3 protein
Length 983
Mass (Da) 109955
Sequence Mouse EphA3 protein sequence
Species Rat EphA3 protein
Length 984
Mass (Da) 110228
Sequence Rat EphA3 protein sequence

EphA3 Protein Molecular Weight & PI

Ephrin type-A receptor 3 precursor (EC (EPH-like kinase 4) (EK4) (hEK4) (HEK) (Human embryo kinase) (Tyrosine-protein kinase TYRO4) (Tyrosine-protein kinase receptor ETK1) (Eph-like tyrosine kinase 1) Homo sapiens (Human).

The parameters have been computed for the following feature

FT CHAIN 21-983 Ephrin type-A receptor 3.

Molecular weight (Da)


Theoretical pI


EphA3 Protein Structure

The Human Epha3 Receptor Tyrosine Kinase and Juxtamembrane Region
2006-04-26   Released:  2006-06-13
Deposition Author(s)
Walker, J.R., Davis, T., Dong, A., Newman, E.M., MacKenzie, F., Weigelt, J., Sundstrom, M., Arrowsmith, C.H., Edwards, A.M., Bochkarev, A., Dhe-Paganon, S., Structural Genomics Consortium (SGC)
Homo sapiens
Expression System
Escherichia coli
Experimental Data Snapshot
1.7700 Å
R-Value Free
R-Value Work

Human EphA3 protein Secondary structure

EphA3 Protein Interaction

Recombinant EphA3 Protein Feature

EphA3 Protein, Human, Recombinant (His Tag)

High Purity
> 95 % as determined by SDS-PAGE
Low Endotoxin
< 1.0 EU per μg of the protein as determined by the LAL method
High Activity
Measured by its binding ability in a functional ELISA. Immobilized human EPHA3-His at 10 μg/ml (100 μl/well) can bind human EphrinA5-Fc (Cat:10192-H02H), The EC50 of human EphrinA5-Fc (Cat:10192-H02H) is 6.2-14.6 ng/ml.

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