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Entry version 171 (18 Sep 2019)
Sequence version 1 (01 Apr 1990)
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Protein

Translation initiation factor eIF-2B subunit alpha

Gene

GCN3

Organism
Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Acts as a non-essential regulatory component of the translation initiation factor 2B (eIF2-B or GCD complex), which catalyzes the exchange of eukaryotic initiation factor 2 (eIF-2)-bound GDP for GTP and is regulated by phosphorylated eIF-2. It activates the synthesis of GCN4 in yeast under amino acid starvation conditions by suppressing the inhibitory effects of multiple AUG codons present in the leader of GCN4 mRNA. It may promote either repression or activation of GCN4 expression depending on amino acid availability. Modulation of GCN3 regulatory function in response to amino acid availability occurs post-translationally.2 Publications

Miscellaneous

Present with 8970 molecules/cell in log phase SD medium.1 Publication

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionActivator, Initiation factor, Repressor
Biological processProtein biosynthesis, Translation regulation

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
YEAST:G3O-32002-MONOMER

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-SCE-72731 Recycling of eIF2:GDP

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Translation initiation factor eIF-2B subunit alpha
Alternative name(s):
GCD complex subunit GCN3
Guanine nucleotide exchange factor subunit GCN3
Transcriptional activator GCN3
eIF-2B GDP-GTP exchange factor subunit alpha
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:GCN3
Synonyms:AAS2, TIF221
Ordered Locus Names:YKR026C
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiSaccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri559292 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaFungiDikaryaAscomycotaSaccharomycotinaSaccharomycetesSaccharomycetalesSaccharomycetaceaeSaccharomyces
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000002311 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components. <br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome XI

Organism-specific databases

Eukaryotic Pathogen Database Resources

More...
EuPathDBi
FungiDB:YKR026C

Saccharomyces Genome Database

More...
SGDi
S000001734 GCN3

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cell wall Cytoskeleton Vacuole Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM / Processing</a> section indicates that the initiator methionine is cleaved from the mature protein.<p><a href='/help/init_met' target='_top'>More...</a></p>Initiator methionineiRemovedCombined sources
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001560602 – 305Translation initiation factor eIF-2B subunit alphaAdd BLAST304

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘PTM / Processing’ section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei2N-acetylserineCombined sources1
Modified residuei291PhosphothreonineCombined sources1

Keywords - PTMi

Acetylation, Phosphoprotein

Proteomic databases

MaxQB - The MaxQuant DataBase

More...
MaxQBi
P14741

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
P14741

PRoteomics IDEntifications database

More...
PRIDEi
P14741

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
P14741

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Translation initiation factor 2B (eIF2-B) is composed of five different subunits; alpha (GCN3), beta (GCD7), gamma (GCD1), delta (GCD2) and epsilon (GCD6). A regulatory subcomplex comprising GCN3, GCD7 and GCD2 interacts preferentially with phosphorylated eIF-2 and has no exchange activity in vitro.

2 Publications

<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction_section%27">Interaction</a> section provides information about binary protein-protein interactions. The data presented in this section are a quality-filtered subset of binary interactions automatically derived from the <a href="http://www.ebi.ac.uk/intact/">IntAct database</a>. It is updated on a monthly basis. Each binary interaction is displayed on a separate line.<p><a href='/help/binary_interactions' target='_top'>More...</a></p>Binary interactionsi

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGrid)

More...
BioGridi
34158, 170 interactors

ComplexPortal: manually curated resource of macromolecular complexes

More...
ComplexPortali
CPX-429 Eukaryotic translation initiation factor 2B complex

Database of interacting proteins

More...
DIPi
DIP-1328N

Protein interaction database and analysis system

More...
IntActi
P14741, 82 interactors

Molecular INTeraction database

More...
MINTi
P14741

STRING: functional protein association networks

More...
STRINGi
4932.YKR026C

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
P14741

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Phylogenomic databases

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000175731

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P14741

KEGG Orthology (KO)

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KOi
K03239

Identification of Orthologs from Complete Genome Data

More...
OMAi
QYLVGMF

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.20.120.1070, 1 hit
3.40.50.10470, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR042528 elF-2B_alpha_N
IPR000649 IF-2B-related
IPR042529 IF_2B-like_C
IPR037171 NagB/RpiA_transferase-like

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF01008 IF-2B, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF100950 SSF100950, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

P14741-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MSEFNITETY LRFLEEDTEM TMPIAAIEAL VTLLRIKTPE TAAEMINTIK
60 70 80 90 100
SSTEELIKSI PNSVSLRAGC DIFMRFVLRN LHLYGDWENC KQHLIENGQL
110 120 130 140 150
FVSRAKKSRN KIAEIGVDFI ADDDIILVHG YSRAVFSLLN HAANKFIRFR
160 170 180 190 200
CVVTESRPSK QGNQLYTLLE QKGIPVTLIV DSAVGAVIDK VDKVFVGAEG
210 220 230 240 250
VAESGGIINL VGTYSVGVLA HNARKPFYVV TESHKFVRMF PLSSDDLPMA
260 270 280 290 300
GPPLDFTRRT DDLEDALRGP TIDYTAQEYI TALITDLGVL TPSAVSEELI

KMWYD
Length:305
Mass (Da):34,025
Last modified:April 1, 1990 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i8E9A928D6D56E12B
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

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EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
M23356 Genomic DNA Translation: AAA34637.1
Z28251 Genomic DNA Translation: CAA82098.1
BK006944 Genomic DNA Translation: DAA09181.1

Protein sequence database of the Protein Information Resource

More...
PIRi
A31562

NCBI Reference Sequences

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RefSeqi
NP_012951.1, NM_001179816.1

Genome annotation databases

Ensembl fungal genome annotation project

More...
EnsemblFungii
YKR026C_mRNA; YKR026C; YKR026C

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
853896

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
sce:YKR026C

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M23356 Genomic DNA Translation: AAA34637.1
Z28251 Genomic DNA Translation: CAA82098.1
BK006944 Genomic DNA Translation: DAA09181.1
PIRiA31562
RefSeqiNP_012951.1, NM_001179816.1

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...
PDBei

Protein Data Bank RCSB

More...
RCSB PDBi

Protein Data Bank Japan

More...
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
6I3Melectron microscopy3.93A/B1-305[»]
6I7Telectron microscopy4.61A/B1-305[»]
6QG0electron microscopy4.20A/B1-305[»]
6QG1electron microscopy4.20A/B1-305[»]
6QG2electron microscopy4.60A/B1-305[»]
6QG3electron microscopy9.40A/B1-305[»]
6QG5electron microscopy10.10A/B1-305[»]
6QG6electron microscopy4.65A/B1-305[»]
SMRiP14741
ModBaseiSearch...

Protein-protein interaction databases

BioGridi34158, 170 interactors
ComplexPortaliCPX-429 Eukaryotic translation initiation factor 2B complex
DIPiDIP-1328N
IntActiP14741, 82 interactors
MINTiP14741
STRINGi4932.YKR026C

PTM databases

iPTMnetiP14741

Proteomic databases

MaxQBiP14741
PaxDbiP14741
PRIDEiP14741

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblFungiiYKR026C_mRNA; YKR026C; YKR026C
GeneIDi853896
KEGGisce:YKR026C

Organism-specific databases

EuPathDBiFungiDB:YKR026C
SGDiS000001734 GCN3

Phylogenomic databases

HOGENOMiHOG000175731
InParanoidiP14741
KOiK03239
OMAiQYLVGMF

Enzyme and pathway databases

BioCyciYEAST:G3O-32002-MONOMER
ReactomeiR-SCE-72731 Recycling of eIF2:GDP

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P14741

Family and domain databases

Gene3Di1.20.120.1070, 1 hit
3.40.50.10470, 1 hit
InterProiView protein in InterPro
IPR042528 elF-2B_alpha_N
IPR000649 IF-2B-related
IPR042529 IF_2B-like_C
IPR037171 NagB/RpiA_transferase-like
PfamiView protein in Pfam
PF01008 IF-2B, 1 hit
SUPFAMiSSF100950 SSF100950, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiEI2BA_YEAST
<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: P14741
Secondary accession number(s): D6VX91
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 1, 1990
Last sequence update: April 1, 1990
Last modified: September 18, 2019
This is version 171 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programFungal Protein Annotation Program

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Reference proteome

Documents

  1. Yeast
    Yeast (Saccharomyces cerevisiae): entries, gene names and cross-references to SGD
  2. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  3. SIMILARITY comments
    Index of protein domains and families
  4. Yeast chromosome XI
    Yeast (Saccharomyces cerevisiae) chromosome XI: entries and gene names
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