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Protein

Eukaryotic translation initiation factor 3 subunit I

Gene

Eif3i

Organism
Rattus norvegicus (Rat)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at transcript leveli

Functioni

Component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is required for several steps in the initiation of protein synthesis. The eIF-3 complex associates with the 40S ribosome and facilitates the recruitment of eIF-1, eIF-1A, eIF-2:GTP:methionyl-tRNAi and eIF-5 to form the 43S pre-initiation complex (43S PIC). The eIF-3 complex stimulates mRNA recruitment to the 43S PIC and scanning of the mRNA for AUG recognition. The eIF-3 complex is also required for disassembly and recycling of post-termination ribosomal complexes and subsequently prevents premature joining of the 40S and 60S ribosomal subunits prior to initiation. The eIF-3 complex specifically targets and initiates translation of a subset of mRNAs involved in cell proliferation, including cell cycling, differentiation and apoptosis, and uses different modes of RNA stem-loop binding to exert either translational activation or repression.UniRule annotation

GO - Molecular functioni

  • enzyme binding Source: RGD
  • translation initiation factor activity Source: UniProtKB

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Initiation factor

Keywords - Biological processi

Protein biosynthesis

Names & Taxonomyi

Protein namesi
Recommended name:
Eukaryotic translation initiation factor 3 subunit IUniRule annotation
Short name:
eIF3iUniRule annotation
Alternative name(s):
Eukaryotic translation initiation factor 3 subunit 2UniRule annotation
eIF-3-betaUniRule annotation
eIF3 p36UniRule annotation
Gene namesi
Name:Eif3i
Synonyms:Eif3s2
OrganismiRattus norvegicus (Rat)
Taxonomic identifieri10116 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaSciurognathiMuroideaMuridaeMurinaeRattus
Proteomesi
  • UP000002494 Componenti: Unplaced

Organism-specific databases

RGDi1584560. Eif3i.

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003294581 – 325Eukaryotic translation initiation factor 3 subunit IAdd BLAST325

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei264N6-acetyllysineBy similarity1
Cross-linki282Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)By similarity
Modified residuei308PhosphotyrosineBy similarity1

Post-translational modificationi

Phosphorylated by TGF-beta type II receptor.UniRule annotation

Keywords - PTMi

Acetylation, Isopeptide bond, Phosphoprotein, Ubl conjugation

Proteomic databases

PeptideAtlasiB0BNA7.
PRIDEiB0BNA7.

PTM databases

iPTMnetiB0BNA7.
PhosphoSitePlusiB0BNA7.

Interactioni

Subunit structurei

Component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is composed of 13 subunits: EIF3A, EIF3B, EIF3C, EIF3D, EIF3E, EIF3F, EIF3G, EIF3H, EIF3I, EIF3J, EIF3K, EIF3L and EIF3M. The eIF-3 complex appears to include 3 stable modules: module A is composed of EIF3A, EIF3B, EIF3G and EIF3I; module B is composed of EIF3F, EIF3H, and EIF3M; and module C is composed of EIF3C, EIF3D, EIF3E, EIF3K and EIF3L. EIF3C of module C binds EIF3B of module A and EIF3H of module B, thereby linking the three modules. EIF3J is a labile subunit that binds to the eIF-3 complex via EIF3B. The eIF-3 complex interacts with RPS6KB1 under conditions of nutrient depletion. Mitogenic stimulation leads to binding and activation of a complex composed of MTOR and RPTOR, leading to phosphorylation and release of RPS6KB1 and binding of EIF4B to eIF-3.UniRule annotation

GO - Molecular functioni

  • enzyme binding Source: RGD

Structurei

3D structure databases

ProteinModelPortaliB0BNA7.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Repeati8 – 47WD 1Add BLAST40
Repeati50 – 91WD 2Add BLAST42
Repeati144 – 183WD 3Add BLAST40
Repeati186 – 225WD 4Add BLAST40
Repeati283 – 324WD 5Add BLAST42

Sequence similaritiesi

Belongs to the eIF-3 subunit I family.UniRule annotation
Contains 5 WD repeats.UniRule annotation

Keywords - Domaini

Repeat, WD repeat

Phylogenomic databases

HOVERGENiHBG000900.
InParanoidiB0BNA7.
KOiK03246.
PhylomeDBiB0BNA7.

Family and domain databases

Gene3Di2.130.10.10. 1 hit.
HAMAPiMF_03008. eIF3i. 1 hit.
InterProiIPR027525. eIF3i.
IPR015943. WD40/YVTN_repeat-like_dom.
IPR001680. WD40_repeat.
IPR019775. WD40_repeat_CS.
IPR017986. WD40_repeat_dom.
[Graphical view]
PfamiPF00400. WD40. 3 hits.
[Graphical view]
SMARTiSM00320. WD40. 5 hits.
[Graphical view]
SUPFAMiSSF50978. SSF50978. 1 hit.
PROSITEiPS00678. WD_REPEATS_1. 1 hit.
PS50082. WD_REPEATS_2. 4 hits.
PS50294. WD_REPEATS_REGION. 2 hits.
[Graphical view]

Sequencei

Sequence statusi: Complete.

B0BNA7-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKPILLQGHE RSITQIKYNR EGDLLFTVAK DPIVNVWYSV NGERLGTYMG
60 70 80 90 100
HTGAVWCVDA DWDTKHVLTG SADNSCRLWD CETGKQLALL KTNSAVRTCG
110 120 130 140 150
FDFGGNIIMF STDKQMGYQC FVSFFDLRDP SQIDSNEPYM KIPCNDSKIT
160 170 180 190 200
SAVWGPLGEC IIAGHESGEL NQYSAKSGEV LVNVKEHSRQ INDIQLSRDM
210 220 230 240 250
TMFVTASKDN TAKLFDSTSL EHQKTFRTER PVNSAALSPN YDHVVLGGGQ
260 270 280 290 300
EAMDVTTTST RIGKFEARFF HLAFEEEFGR VKGHFGPINS VAFHPDGKSY
310 320
SSGGEDGYVR IHYFDPQYFE FEFEA
Length:325
Mass (Da):36,461
Last modified:February 26, 2008 - v1
Checksum:iFCEF0FCFB7D20D16
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BC158748 mRNA. Translation: AAI58749.1.
BC158821 mRNA. Translation: AAI58822.1.
RefSeqiNP_001108507.1. NM_001115035.1.
UniGeneiRn.162577.

Genome annotation databases

GeneIDi682390.
KEGGirno:682390.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BC158748 mRNA. Translation: AAI58749.1.
BC158821 mRNA. Translation: AAI58822.1.
RefSeqiNP_001108507.1. NM_001115035.1.
UniGeneiRn.162577.

3D structure databases

ProteinModelPortaliB0BNA7.
ModBaseiSearch...
MobiDBiSearch...

PTM databases

iPTMnetiB0BNA7.
PhosphoSitePlusiB0BNA7.

Proteomic databases

PeptideAtlasiB0BNA7.
PRIDEiB0BNA7.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi682390.
KEGGirno:682390.

Organism-specific databases

CTDi8668.
RGDi1584560. Eif3i.

Phylogenomic databases

HOVERGENiHBG000900.
InParanoidiB0BNA7.
KOiK03246.
PhylomeDBiB0BNA7.

Miscellaneous databases

PROiB0BNA7.

Family and domain databases

Gene3Di2.130.10.10. 1 hit.
HAMAPiMF_03008. eIF3i. 1 hit.
InterProiIPR027525. eIF3i.
IPR015943. WD40/YVTN_repeat-like_dom.
IPR001680. WD40_repeat.
IPR019775. WD40_repeat_CS.
IPR017986. WD40_repeat_dom.
[Graphical view]
PfamiPF00400. WD40. 3 hits.
[Graphical view]
SMARTiSM00320. WD40. 5 hits.
[Graphical view]
SUPFAMiSSF50978. SSF50978. 1 hit.
PROSITEiPS00678. WD_REPEATS_1. 1 hit.
PS50082. WD_REPEATS_2. 4 hits.
PS50294. WD_REPEATS_REGION. 2 hits.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiEIF3I_RAT
AccessioniPrimary (citable) accession number: B0BNA7
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 29, 2008
Last sequence update: February 26, 2008
Last modified: November 2, 2016
This is version 64 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Translation initiation factors
    List of translation initiation factor entries
  2. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.