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Q493S3 (SYI_BLOPB) Reviewed, UniProtKB/Swiss-Prot

Last modified April 16, 2014. Version 66. 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:BPEN_122
OrganismBlochmannia pennsylvanicus (strain BPEN) [Complete proteome] [HAMAP]
Taxonomic identifier291272 [NCBI]
Taxonomic lineageBacteriaProteobacteriaGammaproteobacteriaEnterobacterialesEnterobacteriaceaeant endosymbiontsCandidatus Blochmannia

Protein attributes

Sequence length942 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 – 942942Isoleucine--tRNA ligase HAMAP-Rule MF_02002
PRO_0000098356

Regions

Motif58 – 6811"HIGH" region HAMAP-Rule MF_02002
Motif605 – 6095"KMSKS" region HAMAP-Rule MF_02002

Sites

Metal binding9051Zinc By similarity
Metal binding9081Zinc By similarity
Metal binding9251Zinc By similarity
Metal binding9281Zinc By similarity
Binding site5641Aminoacyl-adenylate By similarity
Binding site6081ATP By similarity

Sequences

Sequence LengthMass (Da)Tools
Q493S3 [UniParc].

Last modified September 13, 2005. Version 1.
Checksum: D9724149300EDD20

FASTA942108,694
        10         20         30         40         50         60 
MINYKNTLNL PYTLFPMRAN LPVCEPTILE RWYKDNLYEA IRHKKSKKKL FILHDGPPYV 

        70         80         90        100        110        120 
NGSIHLGHAV NKVLKDIILK YKTLTGYNAP YIPGWDCHGL PIELQVERLI GQLGVNVDPN 

       130        140        150        160        170        180 
EFRSICRNYV LDQIEIQKKD FVRLGVLGDW SRPYLTMDFK TEANIIRTLS KVISNGYFYK 

       190        200        210        220        230        240 
GTKPVHWCFQ CCSVLAESEV EYNNHCSPAI DVAFFAVDNI RISKIFNIDL CQRVIELVIW 

       250        260        270        280        290        300 
TTTPWTLPSN QAISVHPDYS YQLIAINNSK YIIIAANLVN TVMQRIQCFS WRILGETSGN 

       310        320        330        340        350        360 
SLESLKFRHP FMSFDVPVVL SGHVALDSGT GVVHIAPNHG VDDYIIARKY NFKIVNIINE 

       370        380        390        400        410        420 
TGHYVSNVHP MLDGVQVFQS NEIIIKLLNQ SGSLLHVNHN YKHNYPYCWR HAVPVIFKAT 

       430        440        450        460        470        480 
AQWFLSMDKY NLRNKLLQTI HQVDWIPNKG EYSIETMIVN RPDWCLSRQR VWGVPIPLFI 

       490        500        510        520        530        540 
HKKTSILHPR TIALMEVIAQ HVEQNGIQAW WDLKTEDIID NEEADQYEKV LDTLDVWFDS 

       550        560        570        580        590        600 
GSTHYSVIPE RLEYRKQSPD LYLEGSDQYR GWFMSSLIIS TVITGQAPYR EVLTHGFTVD 

       610        620        630        640        650        660 
AQGRKMSKSL GNVISPQEII KDFGADILRL WIASSDYSKE MAISNAILKH TIDVYRRIRN 

       670        680        690        700        710        720 
TARFCLANIS DFDPEKDSVH PENMIELDCW AIDRALSVQL EVISDYNKYN FHNVIQRIMQ 

       730        740        750        760        770        780 
FCSVEMGSFY LDVIKDRQYT TKKNSKERRS CQTALYHIIE SMVRWIAPVL SFTADEIWRH 

       790        800        810        820        830        840 
IPGNRSKYVF TEEWYNGLFS ISSKQIMNSH DWNTFLNVRS EVNKIVEQTR LNGIIGGSLD 

       850        860        870        880        890        900 
ASVVLYATPE LANTLRILGN ELSFGLITSS AIVSDYCNGF NVTQYTQEGI PGLKIFLEKA 

       910        920        930        940 
KGKKCLRCWH YRLDIGQYKN YSNICARCVN NIVGPGEKRR FF 

« Hide

References

[1]"Genome sequence of Blochmannia pennsylvanicus indicates parallel evolutionary trends among bacterial mutualists of insects."
Degnan P.H., Lazarus A.B., Wernegreen J.J.
Genome Res. 15:1023-1033(2005) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: BPEN.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
CP000016 Genomic DNA. Translation: AAZ40762.1.
RefSeqYP_277635.1. NC_007292.1.

3D structure databases

ProteinModelPortalQ493S3.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING291272.BPEN_122.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaAAZ40762; AAZ40762; BPEN_122.
GeneID3563125.
KEGGbpn:BPEN_122.
PATRIC31965135. VBICanBlo110049_0117.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0060.
HOGENOMHOG000246402.
KOK01870.
OMAVLGDWDN.
OrthoDBEOG644ZM1.
ProtClustDBPRK05743.

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.
IPR010663. Znf_DNA_glyclase/IsotRNA_synth.
[Graphical view]
PANTHERPTHR11946:SF9. PTHR11946:SF9. 1 hit.
PfamPF08264. Anticodon_1. 1 hit.
PF00133. tRNA-synt_1. 1 hit.
PF06827. zf-FPG_IleRS. 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_BLOPB
AccessionPrimary (citable) accession number: Q493S3
Entry history
Integrated into UniProtKB/Swiss-Prot: December 20, 2005
Last sequence update: September 13, 2005
Last modified: April 16, 2014
This is version 66 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