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since 01/2001:

Ephrin Receptor Epha4 OKDB#: 2138
 Symbols: EPHA4 Species: human
 Synonyms: HEK8|SEK, MOUSE, HOMOLOG OF|TYRO1|  Locus: 2q36.1 in Homo sapiens

For retrieval of Nucleotide and Amino Acid sequences please go to: OMIM Entrez Gene
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DNA Microarrays
link to BioGPS
General Comment

NCBI Summary: This gene belongs to the ephrin receptor subfamily of the protein-tyrosine kinase family. EPH and EPH-related receptors have been implicated in mediating developmental events, particularly in the nervous system. Receptors in the EPH subfamily typically have a single kinase domain and an extracellular region containing a Cys-rich domain and 2 fibronectin type III repeats. The ephrin receptors are divided into 2 groups based on the similarity of their extracellular domain sequences and their affinities for binding ephrin-A and ephrin-B ligands.
General function Receptor
Cellular localization Plasma membrane
Ovarian function
Expression regulated by
Ovarian localization Granulosa
Comment This gene was found in a mouse DNA array analysis of transcripts expressed in mouse preovulatory follicles. Expression of Eph Receptor Tyrosine Kinases and their Ligands in Human Granulosa Lutein Cells and Human Umbilical Vein Endothelial Cells. Xu Y et al. Corpus luteum development is regulated by gonadotropins and accompanied by extremely rapid vascularization of the avascular granulosa cell compartiment by endothelial cells (EC). The proliferation of Granulosa cells (GC) and EC is a complex interplay and takes place in a spatially and temporarily coordinated manner. The erythropoietin-producing hepatoma amplified sequence (Eph) receptors and their ligands-the ephrins- are a recently detected family of membrane located protein tyrosine kinases which play a crucial role in the growth and development of nerve and blood vessel network. We report about the mRNA expression pattern of Ephs and their ligands in human GC, in human EC, and in carcinoma cell lines OvCar-3 and Hela. The mRNA of EphA4, EphA7, ephrinA4, ephrinB1 and ephrinB2 was detected in GC and EC, while EphA2 was expressed only in GC. The expression of various Ephs and ephrins did not change in GC after stimulation with human chorion gonadotropin. Our study analyzes for the first time the expression of the complete human Eph/ephriny-system in GC and in EC. The remarkable similarity between these two cell types supports the theory of a functional relationship of EC and GC. In addition, it was shown that hCG is not a major determinant of Eph/ephrin regulation in GC.
Follicle stages
Mutations 0 mutations
Genomic Region show genomic region
Phenotypes and GWAS show phenotypes and GWAS
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OMIM (Online Mendelian Inheritance in Man: an excellent source of general gene description and genetic information.)
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created: Oct. 13, 2003, 3:24 p.m. by: xin   email:
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last update: Jan. 3, 2007, 3:58 p.m. by: hsueh    email:

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