EIF5A

Last updated
EIF5A
Protein EIF5A PDB 1FH4.png
Available structures
PDB Ortholog search: I3L397 PDBe I3L397 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
SpeciesHumanMouse
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 [3] [4]
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. [5]

Contents

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. [6]

EF-P is the bacterial homolog of eIF5A, which is modified post-translationally in a similar but distinct way. [7] [8] 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. [9]

Clinical relevance

Germline deleterious heterozygous EIF5A variants cause Faundes-Banka syndrome. [10] [11] This rare human disorder is characterized by variable combinations of developmental delay, microcephaly, micrognathia and dysmorphic features.

Related Research Articles

<span class="mw-page-title-main">TATA-binding protein</span> Protein-coding gene in the species Homo sapiens

The TATA-binding protein (TBP) is a general transcription factor that binds specifically to a DNA sequence called the TATA box. This DNA sequence is found about 30 base pairs upstream of the transcription start site in some eukaryotic gene promoters.

<span class="mw-page-title-main">EF-Tu</span> Prokaryotic elongation factor

EF-Tu is a prokaryotic elongation factor responsible for catalyzing the binding of an aminoacyl-tRNA (aa-tRNA) to the ribosome. It is a G-protein, and facilitates the selection and binding of an aa-tRNA to the A-site of the ribosome. As a reflection of its crucial role in translation, EF-Tu is one of the most abundant and highly conserved proteins in prokaryotes. It is found in eukaryotic mitochondria as TUFM.

Hypusine is an uncommon amino acid found in all eukaryotes and in some archaea, but not in bacteria. The only known proteins containing the hypusine residue is eukaryotic translation initiation factor 5A (eIF-5A) and a similar protein found in archaea. In humans, two isoforms of eIF-5A have been described: eIF5A-1 and eIF5A-2. They are encoded by two distinct genes EIF5A and EIF5A2. The protein is involved in protein biosynthesis and promotes the formation of the first peptide bond. The region surrounding the hypusine residue is highly conserved and is essential to the function of eIF5A. Thus, hypusine and eIF-5A appear to be vital for the viability and proliferation of eukaryotic cells.

<span class="mw-page-title-main">60S ribosomal protein L5</span> Protein found in humans

60S ribosomal protein L5 is a protein that in humans is encoded by the RPL5 gene.

<span class="mw-page-title-main">Eukaryotic translation initiation factor 4 gamma 1</span> Protein-coding gene in the species Homo sapiens

Eukaryotic translation initiation factor 4 gamma 1 is a protein that in humans is encoded by the EIF4G1 gene.

<span class="mw-page-title-main">EIF2S1</span> Protein-coding gene in the species Homo sapiens

Eukaryotic translation initiation factor 2 subunit 1 (eIF2α) is a protein that in humans is encoded by the EIF2S1 gene.

<span class="mw-page-title-main">EIF4G3</span> Protein-coding gene in the species Homo sapiens

Eukaryotic translation initiation factor 4 gamma 3 is a protein that in humans is encoded by the EIF4G3 gene. The gene encodes a protein that functions in translation by aiding the assembly of the ribosome onto the messenger RNA template. Confusingly, this protein is usually referred to as eIF4GII, as although EIF4G3 is the third gene that is similar to eukaryotic translation initiation factor 4 gamma, the second isoform EIF4G2 is not an active translation initiation factor.

<span class="mw-page-title-main">DHPS</span> Protein-coding gene in the species Homo sapiens

Deoxyhypusine synthase is an enzyme that in humans is encoded by the DHPS gene.

<span class="mw-page-title-main">EIF2S3</span> Protein-coding gene in humans

Eukaryotic translation initiation factor 2 subunit 3 (eIF2γ) is a protein that in humans is encoded by the EIF2S3 gene.

<span class="mw-page-title-main">EIF4B</span> Protein-coding gene in humans

Eukaryotic translation initiation factor 4B is a protein that in humans is encoded by the EIF4B gene.

<span class="mw-page-title-main">EIF3H</span> Protein-coding gene in the species Homo sapiens

Eukaryotic translation initiation factor 3 subunit H (eIF3h) is a protein that in humans is encoded by the EIF3H gene.

<span class="mw-page-title-main">VARS</span> Protein-coding gene in the species Homo sapiens

Valyl-tRNA synthetase is an enzyme that in humans is encoded by the VARS gene.

<span class="mw-page-title-main">EIF3EIP</span> Protein-coding gene in the species Homo sapiens

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<span class="mw-page-title-main">EIF4E2</span> Protein-coding gene in the species Homo sapiens

Eukaryotic translation initiation factor 4E type 2 is a protein that in humans is encoded by the EIF4E2 gene. It belongs to the eukaryotic translation initiation factor 4E family.

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Eukaryotic translation initiation factor 5A pseudogene 1, also known as EIF5AP1, is a human gene.

<span class="mw-page-title-main">LGTN</span> Protein-coding gene in the species Homo sapiens

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<span class="mw-page-title-main">EIF5A2</span> Protein-coding gene in the species Homo sapiens

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<span class="mw-page-title-main">EIF4A2</span> Protein-coding gene in the species Homo sapiens

Eukaryotic initiation factor 4A-II is a protein that in humans is encoded by the EIF4A2 gene.

Deoxyhypusine synthase (EC 2.5.1.46, spermidine:eIF5A-lysine 4-aminobutyltransferase (propane-1,3-diamine-forming)) is an enzyme with systematic name (eIF5A-precursor)-lysine:spermidine 4-aminobutyltransferase (propane-1,3-diamine-forming). This enzyme catalyses the following chemical reaction

Archaeal initiation factors are proteins that are used during the translation step of protein synthesis in archaea. The principal functions these proteins perform include ribosome RNA/mRNA recognition, delivery of the initiator Met-tRNAiMet, methionine bound tRNAi, to the 40s ribosome, and proofreading of the initiation complex.

References

  1. 1 2 3 ENSG00000288145 GRCh38: Ensembl release 89: ENSG00000132507, ENSG00000288145 - Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000078812 - Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. Steinkasserer A, Jones T, Sheer D, Koettnitz K, Hauber J, Bevec D (February 1995). "The eukaryotic cofactor for the human immunodeficiency virus type 1 (HIV-1) rev protein, eIF-5A, maps to chromosome 17p12-p13: three eIF-5A pseudogenes map to 10q23.3, 17q25, and 19q13.2". Genomics. 25 (3): 749–752. doi:10.1016/0888-7543(95)80025-H. PMID   7759117.
  6. Wolff EC, Kang KR, Kim YS, Park MH (August 2007). "Posttranslational synthesis of hypusine: evolutionary progression and specificity of the hypusine modification". Amino Acids. 33 (2): 341–350. doi:10.1007/s00726-007-0525-0. PMC   2572820 . PMID   17476569.
  7. Park JH, Johansson HE, Aoki H, Huang BX, Kim HY, Ganoza MC, Park MH (January 2012). "Post-translational modification by β-lysylation is required for activity of Escherichia coli elongation factor P (EF-P)". The Journal of Biological Chemistry. 287 (4): 2579–2590. doi: 10.1074/jbc.M111.309633 . PMC   3268417 . PMID   22128152.
  8. Peil L, Starosta AL, Virumäe K, Atkinson GC, Tenson T, Remme J, Wilson DN (August 2012). "Lys34 of translation elongation factor EF-P is hydroxylated by YfcM". Nature Chemical Biology. 8 (8): 695–697. doi:10.1038/nchembio.1001. PMID   22706199.
  9. Rossi D, Kuroshu R, Zanelli CF, Valentini SR (2013). "eIF5A and EF-P: two unique translation factors are now traveling the same road". Wiley Interdisciplinary Reviews. RNA. 5 (2): 209–222. doi:10.1002/wrna.1211. PMID   24402910. S2CID   25447826.
  10. Faundes V, Jennings MD, Crilly S, Legraie S, Withers SE, Cuvertino S, Davies SJ, Douglas AG, Fry AE, Harrison V, Amiel J, Lehalle D, Newman WG, Newkirk P, Ranells J, Splitt M, Cross LA, Saunders CJ, Sullivan BR, Granadillo JL, Gordon CT, Kasher PR, Pavitt GD, Banka S (February 2021). "Impaired eIF5A function causes a Mendelian disorder that is partially rescued in model systems by spermidine". Nature Communications. 12 (1): 833. Bibcode:2021NatCo..12..833F. doi:10.1038/s41467-021-21053-2. PMC   7864902 . PMID   33547280.
  11. "OMIM Entry - # 619376 - FAUNDES-BANKA SYNDROME; FABAS". omim.org. Retrieved 2022-01-03.

Further reading