Pseudogene similar to primate FRD envelope proteins

ENSG00000218410 encodes a **pseudogene** related to the *envelope (env)* protein of the human endogenous retrovirus family FRD, specifically analogous to the ancestral envelope proteins found in Old World monkeys and other primates[1][2]. In Old World monkeys, the functional ortholog of this gene (sometimes called syncytin) mediates the fusion of placental cells (syncytiotrophoblast formation) critical for placental development[2]. In humans, however, this locus is interrupted by frameshifts and stop codons and does **not** encode a functional protein—it is a genetically inactive remnant (“pseudogene”)[2]. There is no evidence that the human pseudogene has an active role in cellular physiology, disease, or as a therapeutic target[1][2]. Other **human endogenous retroviral envelope genes** that remain functional (e.g., ERVW-1/SYNCYTIN-1, ERVFRD-1/SYNCYTIN-2) have important roles in placentation, but ENSG00000218410 does **not** contribute to this process[2]. There is no evidence this locus is targeted by drugs or is used as a clinical biomarker. **Key points:** - ENSG00000218410 is a retained sequence of an ancient viral gene but **not** a functional gene in humans[1]. - Its orthologs (not the human version) in Old World monkeys mediate cell fusion in placenta[2]. - It is **not a receptor, enzyme, transporter, transcription factor, or any canonical drug target protein**[1][2]. - It does **not** have established diagnostic, therapeutic, or pathological significance in modern humans[1]. This pseudogene represents the remnants of a viral gene that contributed to mammalian evolution but is no longer functional or clinically relevant in humans.

Other names

HERV-FRD provirus ancestral Env polyprotein pseudogeneendogenous retrovirus group FRD, member 1 pseudogeneLOC100533723ENVFRD