UniProt Accession

 EIF3I_HUMAN; Q13347 

Genbank Protein ID

 U39067; U36764; BC000413; BC003140 

Genbank Nucleotide ID

 AAC97144.1; AAC50224.1; AAH00413.1; AAH03140.1 

Protein Name

 Eukaryotic translation initiation factor 3 subunit I 

Protein Synonyms/Alias

 eIF3i; Eukaryotic translation initiation factor 3 subunit 2; TGF-beta receptor-interacting protein 1; TRIP-1; eIF-3-beta; eIF3 p36 

Gene Name

 EIF3I 

Gene Synonyms/Alias

 EIF3S2; TRIP1 

Created Date

 July 27, 2013 

Organism

 Homo sapiens (Human) 

NCBI Taxa ID

 9606 

Lysine Modification

Position	Peptide	Type	References
2	******MKPILLQGH	ubiquitination	[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
17	ERSITQIKYNREGDL	ubiquitination	[3, 4, 5, 8, 9, 10, 11]
30	DLLFTVAKDPIVNVW	ubiquitination	[4, 9, 12]
65	VDADWDTKHVLTGSA	ubiquitination	[5, 8]
85	LWDCETGKQLALLKT	ubiquitination	[3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
91	GKQLALLKTNSAVRT	ubiquitination	[3, 4, 5, 6, 8, 9, 10, 11, 12]
141	DNNEPYMKIPCNDSK	ubiquitination	[5, 8, 11, 12]
148	KIPCNDSKITSAVWG	ubiquitination	[5, 8]
176	ELNQYSAKSGEVLVN	ubiquitination	[5, 8, 11]
185	GEVLVNVKEHSRQIN	ubiquitination	[4, 5, 6, 8, 9, 11, 12]
208	TMFVTASKDNTAKLF	ubiquitination	[4, 5, 6, 8, 9, 11]
213	ASKDNTAKLFDSTTL	ubiquitination	[3, 4, 5, 7, 8, 9, 10, 11]
224	STTLEHQKTFRTERP	ubiquitination	[3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
264	TTSTRIGKFEARFFH	acetylation	[11, 14, 15]
264	TTSTRIGKFEARFFH	ubiquitination	[3, 4, 5, 6, 8, 10, 11, 16]
282	EEEFGRVKGHFGPIN	ubiquitination	[2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 16, 17]
298	VAFHPDGKSYSSGGE	ubiquitination	[3, 4, 5, 8, 9, 10, 11, 12, 16]

Reference

 [1] A data set of human endogenous protein ubiquitination sites.
 Shi Y, Chan DW, Jung SY, Malovannaya A, Wang Y, Qin J.
 Mol Cell Proteomics. 2011 May;10(5):M110.002089. [PMID: 20972266]
 [2] Mass spectrometric analysis of lysine ubiquitylation reveals promiscuity at site level.
 Danielsen JM, Sylvestersen KB, Bekker-Jensen S, Szklarczyk D, Poulsen JW, Horn H, Jensen LJ, Mailand N, Nielsen ML.
 Mol Cell Proteomics. 2011 Mar;10(3):M110.003590. [PMID: 21139048]
 [3] A proteome-wide, quantitative survey of in vivo ubiquitylation sites reveals widespread regulatory roles.
 Wagner SA, Beli P, Weinert BT, Nielsen ML, Cox J, Mann M, Choudhary C.
 Mol Cell Proteomics. 2011 Oct;10(10):M111.013284. [PMID: 21890473]
 [4] Systematic and quantitative assessment of the ubiquitin-modified proteome.
 Kim W, Bennett EJ, Huttlin EL, Guo A, Li J, Possemato A, Sowa ME, Rad R, Rush J, Comb MJ, Harper JW, Gygi SP.
 Mol Cell. 2011 Oct 21;44(2):325-40. [PMID: 21906983]
 [5] Global identification of modular cullin-RING ligase substrates.
 Emanuele MJ, Elia AE, Xu Q, Thoma CR, Izhar L, Leng Y, Guo A, Chen YN, Rush J, Hsu PW, Yen HC, Elledge SJ.
 Cell. 2011 Oct 14;147(2):459-74. [PMID: 21963094]
 [6] Methods for quantification of in vivo changes in protein ubiquitination following proteasome and deubiquitinase inhibition.
 Udeshi ND, Mani DR, Eisenhaure T, Mertins P, Jaffe JD, Clauser KR, Hacohen N, Carr SA.
 Mol Cell Proteomics. 2012 May;11(5):148-59. [PMID: 22505724]
 [7] Systems-wide analysis of ubiquitylation dynamics reveals a key role for PAF15 ubiquitylation in DNA-damage bypass.
 Povlsen LK, Beli P, Wagner SA, Poulsen SL, Sylvestersen KB, Poulsen JW, Nielsen ML, Bekker-Jensen S, Mailand N, Choudhary C.
 Nat Cell Biol. 2012 Oct;14(10):1089-98. [PMID: 23000965]
 [8] Refined preparation and use of anti-diglycine remnant (K-ε-GG) antibody enables routine quantification of 10,000s of ubiquitination sites in single proteomics experiments.
 Udeshi ND, Svinkina T, Mertins P, Kuhn E, Mani DR, Qiao JW, Carr SA.
 Mol Cell Proteomics. 2013 Mar;12(3):825-31. [PMID: 23266961]
 [9] Landscape of the PARKIN-dependent ubiquitylome in response to mitochondrial depolarization.
 Sarraf SA, Raman M, Guarani-Pereira V, Sowa ME, Huttlin EL, Gygi SP, Harper JW.
 Nature. 2013 Apr 18;496(7445):372-6. [PMID: 23503661]
 [10] hCKSAAP_UbSite: improved prediction of human ubiquitination sites by exploiting amino acid pattern and properties.
 Chen Z, Zhou Y, Song J, Zhang Z.
 Biochim Biophys Acta. 2013 Aug;1834(8):1461-7. [PMID: 23603789]
 [11] Integrated proteomic analysis of post-translational modifications by serial enrichment.
 Mertins P, Qiao JW, Patel J, Udeshi ND, Clauser KR, Mani DR, Burgess MW, Gillette MA, Jaffe JD, Carr SA.
 Nat Methods. 2013 Jul;10(7):634-7. [PMID: 23749302]
 [12] Ubiquitin ligase substrate identification through quantitative proteomics at both the protein and peptide levels.
 Lee KA, Hammerle LP, Andrews PS, Stokes MP, Mustelin T, Silva JC, Black RA, Doedens JR.
 J Biol Chem. 2011 Dec 2;286(48):41530-8. [PMID: 21987572]
 [13] Proteomic analyses reveal divergent ubiquitylation site patterns in murine tissues.
 Wagner SA, Beli P, Weinert BT, Schölz C, Kelstrup CD, Young C, Nielsen ML, Olsen JV, Brakebusch C, Choudhary C.
 Mol Cell Proteomics. 2012 Dec;11(12):1578-85. [PMID: 22790023]
 [14] Lysine acetylation targets protein complexes and co-regulates major cellular functions.
 Choudhary C, Kumar C, Gnad F, Nielsen ML, Rehman M, Walther TC, Olsen JV, Mann M.
 Science. 2009 Aug 14;325(5942):834-40. [PMID: 19608861]
 [15] Proteomic investigations reveal a role for RNA processing factor THRAP3 in the DNA damage response.
 Beli P, Lukashchuk N, Wagner SA, Weinert BT, Olsen JV, Baskcomb L, Mann M, Jackson SP, Choudhary C.
 Mol Cell. 2012 Apr 27;46(2):212-25. [PMID: 22424773]
 [16] Proteome-wide identification of ubiquitylation sites by conjugation of engineered lysine-less ubiquitin.
 Oshikawa K, Matsumoto M, Oyamada K, Nakayama KI.
 J Proteome Res. 2012 Feb 3;11(2):796-807. [PMID: 22053931]
 [17] Quantitative analysis of global ubiquitination in HeLa cells by mass spectrometry.
 Meierhofer D, Wang X, Huang L, Kaiser P.
 J Proteome Res. 2008 Oct;7(10):4566-76. [PMID: 18781797] 

Functional Description

 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 preinitiation 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. 

Sequence Annotation

 REPEAT 8 47 WD 1.
 REPEAT 50 91 WD 2.
 REPEAT 144 183 WD 3.
 REPEAT 186 225 WD 4.
 REPEAT 283 324 WD 5.
 MOD_RES 264 264 N6-acetyllysine.
 MOD_RES 308 308 Phosphotyrosine.
 CROSSLNK 282 282 Glycyl lysine isopeptide (Lys-Gly)  

Keyword

 Acetylation; Complete proteome; Cytoplasm; Direct protein sequencing; Initiation factor; Isopeptide bond; Phosphoprotein; Protein biosynthesis; Reference proteome; Repeat; Ubl conjugation; WD repeat. 

Sequence Source

 UniProt (SWISSPROT/TrEMBL); GenBank; EMBL 

Protein Length

 325 AA 

Protein Sequence

Gene Ontology

 GO:0005829; C:cytosol; TAS:Reactome.
 GO:0016282; C:eukaryotic 43S preinitiation complex; IEA:HAMAP.
 GO:0033290; C:eukaryotic 48S preinitiation complex; IEA:HAMAP.
 GO:0005852; C:eukaryotic translation initiation factor 3 complex; IDA:UniProtKB.
 GO:0003743; F:translation initiation factor activity; IDA:UniProtKB.
 GO:0001731; P:formation of translation preinitiation complex; IEA:HAMAP.
 GO:0006446; P:regulation of translational initiation; IEA:HAMAP. 

Interpro

 IPR027525; eIF3i.
 IPR015943; WD40/YVTN_repeat-like_dom.
 IPR001680; WD40_repeat.
 IPR019775; WD40_repeat_CS.
 IPR017986; WD40_repeat_dom. 

Pfam

 PF00400; WD40 

SMART

 SM00320; WD40 

PROSITE

 PS00678; WD_REPEATS_1
 PS50082; WD_REPEATS_2
 PS50294; WD_REPEATS_REGION 

PRINTS