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EIF5A
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EIF5A

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EIF5A
Protein EIF5A PDB 1FH4.png
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases EIF5A, EIF-5A, EIF5A1, eIF5AI, eukaryotic translation initiation factor 5A, eIF-4D, FABAS
External IDs OMIM: 600187 MGI: 106248 HomoloGene: 133803 GeneCards: EIF5A
Orthologs
Species Human Mouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)
RefSeq (protein)
Location (UCSC) Chr 17: 7.31 – 7.31 Mb Chr 11: 69.81 – 69.81 Mb
PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Eukaryotic translation initiation factor 5A-1 is a protein that in humans is encoded by the EIF5A gene.

It is the only known protein to contain the unusual amino acid hypusine [Nε-(4-amino-2-hydroxybutyl)-lysine], which is synthesized on eIF5A at a specific lysine residue from the polyamine spermidine by two catalytic steps.

EF-P is the bacterial homolog of eIF5A, which is modified post-translationally in a similar but distinct way. Both proteins are believed to catalyze peptide bond formation and help resolve ribosomal stalls, making them elongation factors despite the "initiation factor" name originally assigned.

Clinical relevance

Germline deleterious heterozygous EIF5A variants cause Faundes-Banka syndrome. This rare human disorder is characterized by variable combinations of developmental delay, microcephaly, micrognathia and dysmorphic features.

Further reading


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