Protein: Eukaryotic translation initiation factor 5A-1 (eIF-5A-1) (eIF-5A1) (Eukaryotic initiation factor 5A isoform 1) (eIF-5A) (Rev-binding factor) (eIF-4D) (P63241)
Organism: Homo sapiens (Human)
Function: mRNA-binding protein involved in translation elongation. Has an important function at the level of mRNA turnover, probably acting downstream of decapping. Critical for the efficient synthesis of peptide bonds between consecutive proline residues. Can resolve ribosomal stalling caused by consecutive prolines during translation. Involved in actin dynamics and cell cycle progression, mRNA decay and probably in a pathway involved in stress response and maintenance of cell wall integrity. With syntenin SDCBP, functions as a regulator of p53/TP53 and p53/TP53-dependent apoptosis. Regulates also TNF-alpha-mediated apoptosis. Mediates effects of polyamines on neuronal process extension and survival. May play an important role in brain development and function, and in skeletal muscle stem cell differentiation (By similarity). Also described as a cellular cofactor of human T-cell leukemia virus type I (HTLV-1) Rex protein and of human immunodeficiency virus type 1 (HIV-1) Rev protein, essential for mRNA export of retroviral transcripts.
Subcellular location: Cytoplasm {ECO:0000269|PubMed:10944119, ECO:0000269|PubMed:17187778, ECO:0000269|PubMed:19379712, ECO:0000269|PubMed:27306458, ECO:0000269|PubMed:8660923}. Nucleus {ECO:0000269|PubMed:10944119, ECO:0000269|PubMed:17187778, ECO:0000269|PubMed:19379712, ECO:0000269|PubMed:27306458, ECO:0000269|PubMed:8253832}. Endoplasmic reticulum membrane {ECO:0000269|PubMed:8660923}; Peripheral membrane protein {ECO:0000269|PubMed:8660923}; Cytoplasmic side {ECO:0000269|PubMed:8660923}. Note=Hypusine modification promotes the nuclear export and cytoplasmic localization and there was a dynamic shift in the localization from predominantly cytoplasmic to primarily nuclear under apoptotic inducing conditions (PubMed:19379712, PubMed:27306458). Nuclear export of hypusinated protein is mediated by XPO4 (PubMed:10944119, PubMed:27306458). {ECO:0000269|PubMed:10944119, ECO:0000269|PubMed:19379712, ECO:0000269|PubMed:27306458}.
Sequence: MADDLDFETGDAGASATFPMQCSALRKNGFVVLKGRPCKIVEMSTSKTGKHGHAKVHLVGIDIFTGKKYEDICPSTHNMDVPNIKRNDFQLIGIQDGYLSLLQDSGEVREDLRLPEGDLGKEIEQKYDCGEEILITVLSAMTEEAAVAIKAMAK
InterPro domains: - IPR008991: Translation protein SH3-like domain superfamily (homologous_superfamily) [13-91]
- IPR048670: Translation initiation factor 5A-like, N-terminal (domain) [15-77]
- IPR020189: Translation elongation factor, IF5A C-terminal (domain) [83-150]
- IPR001884: Translation elongation factor IF5A-like (family) [1-154]
- IPR019769: Translation elongation factor, IF5A, hypusine site (ptm) [48-55]
- IPR014722: Large ribosomal subunit protein uL2, domain 2 (homologous_superfamily) [2-83]
- IPR012340: Nucleic acid-binding, OB-fold (homologous_superfamily) [84-152]
Interaction partners: - Deoxyhypusine hydroxylase
- Deoxyhypusine synthase
- Ubiquitin-like protein FUBI
- Elongation factor 2
- Large ribosomal subunit protein uL18
- Large ribosomal subunit protein uL23
- Small ribosomal subunit protein uS17
- Small ribosomal subunit protein uS3
- Large ribosomal subunit protein uL29
- Large ribosomal subunit protein uL14
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0050789 (regulation of biological process), GO:0065007 (biological regulation), GO:0048518 (positive regulation of biological process), GO:0050794 (regulation of cellular process), GO:0048522 (positive regulation of cellular process), GO:0010941 (regulation of cell death), GO:0010942 (positive regulation of cell death), GO:0043067 (regulation of programmed cell death), GO:0043068 (positive regulation of programmed cell death), GO:0043065 (positive regulation of apoptotic process), GO:0042981 (regulation of apoptotic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005829 (cytosol), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005737 (cytoplasm), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle)