Aliases: SELB, EFSEC.
EEFSEC (eukaryotic elongation factor, selenocysteine-tRNA specific) is named by 1 disorder entry, EEFSEC Deficiency.
ai-gene-review gives EEFSEC's core molecular functions as GTPase activity; tRNA binding; and translation elongation factor activity, acting in selenocysteine incorporation. eEFSec is the dedicated elongation factor that delivers selenocysteinyl-tRNA(Sec) to the ribosome at in-frame UGA codons during selenoprotein synthesis. The upstream gene review is being completed; changes made there reach this page only when the ingest layer is next refreshed.
EEFSEC Deficiency types the gene as causative and records the variants as germline. The gene sits on the node EEFSEC-dependent Sec-tRNA elongation defect, from which the pathograph runs through reduced selenoprotein levels to progressive neurodegeneration with cerebellar involvement.
The KB annotates EEFSEC's mechanism node with the processes selenocysteine incorporation; and translational elongation, and shares selenocysteine incorporation with the ai-gene-review core functions by exact GO identifier. The broader "translational elongation" term on the node is a parent of the elongation step the gene review describes, not a disagreement.
ClinGen classifies EEFSEC for 0 diseases, so the entry records no gene-disease validity tier.
Underlined values are claims re-computed from the knowledge base each time this page is built. The tables below are the source of truth.
ai-gene-review has this gene at status INITIALIZED; the description is shown only once the review is complete. Read the draft upstream.
Relationship is the entry's genetic[].relationship_type. untyped means the entry has a genetic record for the gene but does not type it; its free-text association is shown instead.
| Disorder | Relationship | Where the gene appears |
|---|---|---|
| EEFSEC Deficiency | causative germline |
mechanism: EEFSEC-dependent Sec-tRNA elongation defect
|
Identity from HGNC (snapshot 2026-10-01). Page layers are described in the gene pages documentation.