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B1I721 (SYI_STRPI) Reviewed, UniProtKB/Swiss-Prot

Last modified May 14, 2014. Version 50. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | Third-party data text xml rdf/xml gff fasta
to top of pageNames·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order

Names and origin

Protein namesRecommended name:
Isoleucine--tRNA ligase

EC=6.1.1.5
Alternative name(s):
Isoleucyl-tRNA synthetase
Short name=IleRS
Gene names
Name:ileS
Ordered Locus Names:SPH_1767
OrganismStreptococcus pneumoniae (strain Hungary19A-6) [Complete proteome] [HAMAP]
Taxonomic identifier487214 [NCBI]
Taxonomic lineageBacteriaFirmicutesBacilliLactobacillalesStreptococcaceaeStreptococcus

Protein attributes

Sequence length930 AA.
Sequence statusComplete.
Protein existenceInferred from homology

General annotation (Comments)

Function

Catalyzes the attachment of isoleucine to tRNA(Ile). As IleRS can inadvertently accommodate and process structurally similar amino acids such as valine, to avoid such errors it has two additional distinct tRNA(Ile)-dependent editing activities. One activity is designated as 'pretransfer' editing and involves the hydrolysis of activated Val-AMP. The other activity is designated 'posttransfer' editing and involves deacylation of mischarged Val-tRNA(Ile) By similarity. HAMAP-Rule MF_02002

Catalytic activity

ATP + L-isoleucine + tRNA(Ile) = AMP + diphosphate + L-isoleucyl-tRNA(Ile). HAMAP-Rule MF_02002

Cofactor

Binds 1 zinc ion per subunit By similarity. HAMAP-Rule MF_02002

Subunit structure

Monomer By similarity. HAMAP-Rule MF_02002

Subcellular location

Cytoplasm By similarity HAMAP-Rule MF_02002.

Domain

IleRS has two distinct active sites: one for aminoacylation and one for editing. The misactivated valine is translocated from the active site to the editing site, which sterically excludes the correctly activated isoleucine. The single editing site contains two valyl binding pockets, one specific for each substrate (Val-AMP or Val-tRNA(Ile)) By similarity. HAMAP-Rule MF_02002

Sequence similarities

Belongs to the class-I aminoacyl-tRNA synthetase family. IleS type 1 subfamily.

Ontologies

Keywords
   Biological processProtein biosynthesis
   Cellular componentCytoplasm
   LigandATP-binding
Metal-binding
Nucleotide-binding
Zinc
   Molecular functionAminoacyl-tRNA synthetase
Ligase
   Technical termComplete proteome
Gene Ontology (GO)
   Biological_processisoleucyl-tRNA aminoacylation

Inferred from electronic annotation. Source: UniProtKB-HAMAP

   Cellular_componentcytoplasm

Inferred from electronic annotation. Source: UniProtKB-SubCell

   Molecular_functionATP binding

Inferred from electronic annotation. Source: UniProtKB-HAMAP

aminoacyl-tRNA editing activity

Inferred from electronic annotation. Source: InterPro

isoleucine-tRNA ligase activity

Inferred from electronic annotation. Source: UniProtKB-HAMAP

zinc ion binding

Inferred from electronic annotation. Source: UniProtKB-HAMAP

Complete GO annotation...

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 930930Isoleucine--tRNA ligase HAMAP-Rule MF_02002
PRO_1000189203

Regions

Motif57 – 6711"HIGH" region HAMAP-Rule MF_02002
Motif595 – 5995"KMSKS" region HAMAP-Rule MF_02002

Sites

Metal binding8881Zinc By similarity
Metal binding8911Zinc By similarity
Metal binding9081Zinc By similarity
Metal binding9111Zinc By similarity
Binding site5541Aminoacyl-adenylate By similarity
Binding site5981ATP By similarity

Sequences

Sequence LengthMass (Da)Tools
B1I721 [UniParc].

Last modified April 29, 2008. Version 1.
Checksum: 5CDE237F79892013

FASTA930105,337
        10         20         30         40         50         60 
MKLKDTLNLG KTEFPMRAGL PTKEPVWQKE WEDAKLYQRR QELNQGKPHF TLHDGPPYAN 

        70         80         90        100        110        120 
GNIHVGHAMN KISKDIIVRS KSMSGFYAPF IPGWDTHGLP IEQVLSKQGV KRKEMDLVEY 

       130        140        150        160        170        180 
LKLCREYALS QVDKQREDFK RLGVSGDWEN PYVTLTPDYE AAQIRVFGEM ANKGYIYRGA 

       190        200        210        220        230        240 
KPVYWSWSSE SALAEAEIEY HDLVSTSLYY ANKVKDGKGV LDTDTYIVVW TTTPFTITAS 

       250        260        270        280        290        300 
RGLTVGADID YVLVQPAGEA RKFVVAAELL TSLSEKFGWA DVQVLETYRG QELNHIVTEH 

       310        320        330        340        350        360 
PWDTAVEELV ILGDHVTTDS GTGIVHTAPG FGEDDYNVGI ANNLEVAVTV DERGIMMKNA 

       370        380        390        400        410        420 
GPEFEGQFYE KVVPTVIEKL GNLLLAQEEI SHSYPFDWRT KKPIIWRAVP QWFASVSKFR 

       430        440        450        460        470        480 
QEILDEIEKV KFHSEWGKVR LYNMIRDRGD WVISRQRAWG VPLPIFYAED GTAIMVAETI 

       490        500        510        520        530        540 
EHVAQLFEEH GSSIWWERDA KDLLPEEFTH PGSPNGEFKK ETDIMDVWFD SGSSWNGVVV 

       550        560        570        580        590        600 
NRPELTYPAD LYLEGSDQYR GWFNSSLITS VANHGVAPYK QILSQGFALD GKGEKMSKSL 

       610        620        630        640        650        660 
GNTIAPSDVE KQFGAEILRL WVTSVDSSND VRISMDILSQ VSETYRKIRN TLRFLIANTS 

       670        680        690        700        710        720 
DFNPAQDTVA YDELRSVDKY MTIRFNQLVK TIRDAYADFE FLTIYKALVN FINVDLSAFY 

       730        740        750        760        770        780 
LDFAKDVVYI EGAKSLERRQ MQTVFYDILV KITKLLTPIL PHTAEEIWSY LEFEAEDFVQ 

       790        800        810        820        830        840 
LSELPEAQTS ANQEEILDTW AAFMDFRGQA QKALEEARNA KVIGKSLEAH LTVYPNEVVK 

       850        860        870        880        890        900 
TLLEAVNSNV AQLLIVSDLT IAEGPAPEAA LSFEDVAFTV ERAAGEVCDR CRRIDPTTAE 

       910        920        930 
RSYQAVICDH CASIVEENFA EAVAEGFEEK 

« Hide

References

[1]"Complete sequence of Streptococcus pneumoniae strain Hungary 19A-6."
Hotopp J.D., Censini S., Masignani V., Covacci A., Tettelin H.
Submitted (FEB-2008) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: Hungary19A-6.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
CP000936 Genomic DNA. Translation: ACA35572.1.
RefSeqYP_001695040.1. NC_010380.1.

3D structure databases

ProteinModelPortalB1I721.
SMRB1I721. Positions 1-917.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING487214.SPH_1767.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaACA35572; ACA35572; SPH_1767.
GeneID6027767.
KEGGspv:SPH_1767.
PATRIC19693648. VBIStrPne34925_1775.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0060.
HOGENOMHOG000246402.
KOK01870.
OMALGHRVHY.
OrthoDBEOG644ZM1.

Enzyme and pathway databases

BioCycSPNE487214:GHY0-1736-MONOMER.

Family and domain databases

Gene3D1.10.730.10. 1 hit.
3.40.50.620. 2 hits.
3.90.740.10. 1 hit.
HAMAPMF_02002. Ile_tRNA_synth_type1.
InterProIPR001412. aa-tRNA-synth_I_CS.
IPR002300. aa-tRNA-synth_Ia.
IPR002301. Ile-tRNA-ligase.
IPR023585. Ile-tRNA-ligase_type1.
IPR014729. Rossmann-like_a/b/a_fold.
IPR009080. tRNAsynth_1a_anticodon-bd.
IPR013155. V/L/I-tRNA-synth_anticodon-bd.
IPR009008. Val/Leu/Ile-tRNA-synth_edit.
[Graphical view]
PANTHERPTHR11946:SF9. PTHR11946:SF9. 1 hit.
PfamPF08264. Anticodon_1. 1 hit.
PF00133. tRNA-synt_1. 1 hit.
[Graphical view]
PRINTSPR00984. TRNASYNTHILE.
SUPFAMSSF47323. SSF47323. 1 hit.
SSF50677. SSF50677. 1 hit.
TIGRFAMsTIGR00392. ileS. 1 hit.
PROSITEPS00178. AA_TRNA_LIGASE_I. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry nameSYI_STRPI
AccessionPrimary (citable) accession number: B1I721
Entry history
Integrated into UniProtKB/Swiss-Prot: July 28, 2009
Last sequence update: April 29, 2008
Last modified: May 14, 2014
This is version 50 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

Aminoacyl-tRNA synthetases

List of aminoacyl-tRNA synthetase entries