UniProtKB - A0A7I2V613 (A0A7I2V613_HUMAN)
Eukaryotic translation initiation factor 3 subunit I
EIF3I
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 annotationGO - Molecular functioni
- translation initiation factor activity Source: UniProtKB-UniRule
GO - Biological processi
- formation of cytoplasmic translation initiation complex Source: UniProtKB-UniRule
Keywordsi
Molecular function | Initiation factorUniRule annotationARBA annotation |
Biological process | Protein biosynthesis |
Names & Taxonomyi
Protein namesi | Recommended name: Eukaryotic translation initiation factor 3 subunit IUniRule annotationShort name: eIF3iUniRule annotation Alternative name(s): Eukaryotic translation initiation factor 3 subunit 2UniRule annotation eIF-3-betaUniRule annotation eIF3 p36UniRule annotation |
Gene namesi | |
Organismi | Homo sapiens (Human)Imported |
Taxonomic identifieri | 9606 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo |
Proteomesi |
|
Organism-specific databases
HGNCi | HGNC:3272, EIF3I |
Subcellular locationi
Cytoplasm and Cytosol
- Cytoplasm UniRule annotation
Other locations
- eukaryotic 43S preinitiation complex Source: UniProtKB-UniRule
- eukaryotic 48S preinitiation complex Source: UniProtKB-UniRule
- eukaryotic translation initiation factor 3 complex Source: UniProtKB-UniRule
Keywords - Cellular componenti
CytoplasmUniRule annotationPTM / Processingi
Post-translational modificationi
Keywords - PTMi
PhosphoproteinUniRule annotationInteractioni
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 annotationFamily & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Repeati | 6 – 47 | WDPROSITE-ProRule annotationAdd BLAST | 42 | |
Repeati | 48 – 89 | WDPROSITE-ProRule annotationAdd BLAST | 42 | |
Repeati | 184 – 225 | WDPROSITE-ProRule annotationAdd BLAST | 42 |
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 319 – 339 | DisorderedSequence analysisAdd BLAST | 21 | |
Regioni | 352 – 383 | DisorderedSequence analysisAdd BLAST | 32 |
Sequence similaritiesi
Keywords - Domaini
RepeatARBA annotation, WD repeatPROSITE-ProRule annotationARBA annotationPhylogenomic databases
GeneTreei | ENSGT00940000161371 |
Family and domain databases
Gene3Di | 2.130.10.10, 1 hit |
HAMAPi | MF_03008, eIF3i, 1 hit |
InterProi | View protein in InterPro IPR027525, eIF3i IPR015943, WD40/YVTN_repeat-like_dom_sf IPR001680, WD40_repeat IPR019775, WD40_repeat_CS IPR036322, WD40_repeat_dom_sf |
Pfami | View protein in Pfam PF00400, WD40, 3 hits |
SMARTi | View protein in SMART SM00320, WD40, 5 hits |
SUPFAMi | SSF50978, SSF50978, 1 hit |
PROSITEi | View protein in PROSITE PS00678, WD_REPEATS_1, 1 hit PS50082, WD_REPEATS_2, 3 hits |
(1+)i Sequence
Sequence statusi: Complete.
This entry has 1 described isoform and 26 potential isoforms that are computationally mapped.Show allAlign All
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 SQIDNNEPYM KIPCNDSKIT
160 170 180 190 200
SAVWGPLGEC IIAGHESGEL NQYSAKSGEV LVNVKEHSRQ INDIQLSRDM
210 220 230 240 250
TMFVTASKDN TAKLFDSTTL EHQKTFRTER PVNSAALSPN YDHVVLGGGQ
260 270 280 290 300
EAMDVTTTST RIGKFEARFF HLAFEEEFGR VKGHFGPINS VAFHPDGKRG
310 320 330 340 350
RCQKRRHRRA QTAPTVALPQ TPMTVGTGSP AATRSPGRGE RWVPHAWGGH
360 370 380
GRRLNGHSAA GRGGWPGEGA EQWARGSKFL DGG
Computationally mapped potential isoform sequencesi
There are 26 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basketQ13347 | EIF3I_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2, TRIP1 | 325 | Annotation score: | ||
A0A7I2V2M3 | A0A7I2V2M3_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2 | 347 | Annotation score: | ||
A0A7I2V3N2 | A0A7I2V3N2_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2 | 355 | Annotation score: | ||
A0A7I2YQI2 | A0A7I2YQI2_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2 | 438 | Annotation score: | ||
A0A7I2YQI6 | A0A7I2YQI6_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2 | 407 | Annotation score: | ||
A0A7I2V607 | A0A7I2V607_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2 | 357 | Annotation score: | ||
Q5TFK1 | Q5TFK1_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2 | 268 | Annotation score: | ||
A0A7I2V3U3 | A0A7I2V3U3_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2 | 324 | Annotation score: | ||
A0A7I2V5V8 | A0A7I2V5V8_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2 | 270 | Annotation score: | ||
A0A7I2V640 | A0A7I2V640_HUMAN | Eukaryotic translation initiation f... | EIF3I EIF3S2 | 308 | Annotation score: | ||
There are more potential isoformsShow all |
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AL049795 Genomic DNA No translation available. AL121991 Genomic DNA No translation available. |
Genome annotation databases
Ensembli | ENST00000678711; ENSP00000504766; ENSG00000084623 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AL049795 Genomic DNA No translation available. AL121991 Genomic DNA No translation available. |
3D structure databases
SMRi | A0A7I2V613 |
ModBasei | Search... |
Genome annotation databases
Ensembli | ENST00000678711; ENSP00000504766; ENSG00000084623 |
Organism-specific databases
HGNCi | HGNC:3272, EIF3I |
OpenTargetsi | ENSG00000084623 |
GenAtlasi | Search... |
Phylogenomic databases
GeneTreei | ENSGT00940000161371 |
Family and domain databases
Gene3Di | 2.130.10.10, 1 hit |
HAMAPi | MF_03008, eIF3i, 1 hit |
InterProi | View protein in InterPro IPR027525, eIF3i IPR015943, WD40/YVTN_repeat-like_dom_sf IPR001680, WD40_repeat IPR019775, WD40_repeat_CS IPR036322, WD40_repeat_dom_sf |
Pfami | View protein in Pfam PF00400, WD40, 3 hits |
SMARTi | View protein in SMART SM00320, WD40, 5 hits |
SUPFAMi | SSF50978, SSF50978, 1 hit |
PROSITEi | View protein in PROSITE PS00678, WD_REPEATS_1, 1 hit PS50082, WD_REPEATS_2, 3 hits |
MobiDBi | Search... |
Entry informationi
Entry namei | A0A7I2V613_HUMAN | |
Accessioni | A0A7I2V613Primary (citable) accession number: A0A7I2V613 | |
Entry historyi | Integrated into UniProtKB/TrEMBL: | April 7, 2021 |
Last sequence update: | April 7, 2021 | |
Last modified: | September 29, 2021 | |
This is version 3 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Unreviewed (UniProtKB/TrEMBL) | |
Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. |