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Protein

Translation initiation factor IF-1

Gene

infA

Organism
Mycobacterium smegmatis (strain ATCC 700084 / mc(2)155)
Status
Reviewed-Annotation score: Annotation score: 2 out of 5-Experimental evidence at protein leveli

Functioni

One of the essential components for the initiation of protein synthesis. Stabilizes the binding of IF-2 and IF-3 on the 30S subunit to which N-formylmethionyl-tRNA(fMet) subsequently binds. Helps modulate mRNA selection, yielding the 30S pre-initiation complex (PIC). Upon addition of the 50S ribosomal subunit IF-1, IF-2 and IF-3 are released leaving the mature 70S translation initation complex.UniRule annotation

GO - Molecular functioni

Keywordsi

Molecular functionInitiation factor, RNA-binding, rRNA-binding
Biological processProtein biosynthesis

Names & Taxonomyi

Protein namesi
Recommended name:
Translation initiation factor IF-1UniRule annotation
Gene namesi
Name:infAUniRule annotation
Ordered Locus Names:MSMEG_1519, MSMEI_1483
OrganismiMycobacterium smegmatis (strain ATCC 700084 / mc(2)155)
Taxonomic identifieri246196 [NCBI]
Taxonomic lineageiBacteriaActinobacteriaCorynebacterialesMycobacteriaceaeMycobacterium
Proteomesi
  • UP000006158 Componenti: Chromosome
  • UP000000757 Componenti: Chromosome

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003388621 – 73Translation initiation factor IF-1Add BLAST73

Interactioni

Subunit structurei

Component of the 30S ribosomal translation pre-initiation complex which assembles on the 30S ribosome in the order IF-2 and IF-3, IF-1 and N-formylmethionyl-tRNA(fMet); mRNA recruitment can occur at any time during PIC assembly.UniRule annotation

Protein-protein interaction databases

STRINGi246196.MSMEG_1519.

Structurei

3D structure databases

ProteinModelPortaliA0QSL3.
SMRiA0QSL3.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini1 – 73S1-likeUniRule annotationAdd BLAST73

Sequence similaritiesi

Belongs to the IF-1 family.UniRule annotation

Phylogenomic databases

eggNOGiENOG4105K9U. Bacteria.
COG0361. LUCA.
HOGENOMiHOG000221323.
KOiK02518.
OMAiAHVSGKM.
OrthoDBiPOG091H019C.

Family and domain databases

CDDicd04451. S1_IF1. 1 hit.
HAMAPiMF_00075. IF_1. 1 hit.
InterProiView protein in InterPro
IPR012340. NA-bd_OB-fold.
IPR006196. RNA-binding_domain_S1_IF1.
IPR004368. TIF_IF1.
PfamiView protein in Pfam
PF01176. eIF-1a. 1 hit.
SUPFAMiSSF50249. SSF50249. 1 hit.
TIGRFAMsiTIGR00008. infA. 1 hit.
PROSITEiView protein in PROSITE
PS50832. S1_IF1_TYPE. 1 hit.

Sequencei

Sequence statusi: Complete.

A0QSL3-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAKKDGAIEV EGRVIEPLPN AMFRIELENG HKVLAHISGK MRQHYIRILP
60 70
EDRVVVELSP YDLSRGRIVY RYK
Length:73
Mass (Da):8,503
Last modified:January 9, 2007 - v1
Checksum:i70CEADB89E985B48
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000480 Genomic DNA. Translation: ABK74732.1.
CP001663 Genomic DNA. Translation: AFP37956.1.
RefSeqiWP_003886926.1. NZ_CP009494.1.
YP_885901.1. NC_008596.1.

Genome annotation databases

EnsemblBacteriaiABK74732; ABK74732; MSMEG_1519.
AFP37956; AFP37956; MSMEI_1483.
GeneIDi32363946.
4532676.
KEGGimsb:LJ00_07590.
msg:MSMEI_1483.
msm:MSMEG_1519.
PATRICifig|246196.19.peg.1504.

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.

Entry informationi

Entry nameiIF1_MYCS2
AccessioniPrimary (citable) accession number: A0QSL3
Secondary accession number(s): I7G467
Entry historyiIntegrated into UniProtKB/Swiss-Prot: June 10, 2008
Last sequence update: January 9, 2007
Last modified: July 5, 2017
This is version 80 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic 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