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A6Q4I1 (SYI_NITSB) Reviewed, UniProtKB/Swiss-Prot

Last modified April 16, 2014. Version 52. 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:NIS_1282
OrganismNitratiruptor sp. (strain SB155-2) [Complete proteome] [HAMAP]
Taxonomic identifier387092 [NCBI]
Taxonomic lineageBacteriaProteobacteriaEpsilonproteobacteriaNitratiruptor

Protein attributes

Sequence length918 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 – 918918Isoleucine--tRNA ligase HAMAP-Rule MF_02002
PRO_1000022095

Regions

Motif57 – 6711"HIGH" region HAMAP-Rule MF_02002
Motif605 – 6095"KMSKS" region HAMAP-Rule MF_02002

Sites

Metal binding8881Zinc By similarity
Metal binding8911Zinc By similarity
Metal binding9031Zinc By similarity
Metal binding9061Zinc By similarity
Binding site5641Aminoacyl-adenylate By similarity
Binding site6081ATP By similarity

Sequences

Sequence LengthMass (Da)Tools
A6Q4I1 [UniParc].

Last modified August 21, 2007. Version 1.
Checksum: D813A33F9C6F77E5

FASTA918105,037
        10         20         30         40         50         60 
MDYKETLLLP KTTFPMRGNL PQNEPKRFAK WFEKDVYEKM KKSREGKELF TLHDGPPYAN 

        70         80         90        100        110        120 
GHIHIGHALN KILKDIIVKF NYFEGKAVRF TPGWDCHGLP IEQQVEKKLG TAKKEQLPKT 

       130        140        150        160        170        180 
KIRELCREHA AKFVGIQKEE FKNLGVIADW EKPYLTMDYA FEADIYRALC EIAKEGLLVE 

       190        200        210        220        230        240 
RSKPVYWSWA AKTALAEAEV EYEDKVSPSI YVAFKLDKEA VQKIGKEASI IIWTTTPWTL 

       250        260        270        280        290        300 
PANTGIALNP DIEYVLTSDG YVVAADLLDE LKEKGIVKGD VEKSISPKDL ENLHAINPLN 

       310        320        330        340        350        360 
GRRSRIVLGE HVTTESGTGA VHTAPGHGED DYRVGLKYDL EVLMPVDDAG RYDETIVREK 

       370        380        390        400        410        420 
LLPEEFVGMN VFEANDKICE LLGDALLKKE DIKHSYPHCW RTHKPIIFRA TKQWFIAVDK 

       430        440        450        460        470        480 
APKDLQKTLR QIALEEVEKT TFYPEWGRNR LKSMIENRPD WCISRQRDWG VPIAFFRNKK 

       490        500        510        520        530        540 
TGEVIYDEKV LNYIAMIFER MGTDAWYSLS VEELLYPGSG YDPNDLEKVM DILDVWFDSG 

       550        560        570        580        590        600 
STWYAVLKSR RYDAGNYPAD LYLEGSDQHR GWFQSSLLVS GAIEKRAPFK AILTHGFTVD 

       610        620        630        640        650        660 
EKGEKMSKSK GNVVAPMDVA KKYGVEILRL WVAMSDYQSD LKISDNILKQ IAEQYRKLRN 

       670        680        690        700        710        720 
TFRFMLANIN DLETIQSDFG VLDRWILAKA KSVFEEVEKQ FKNYQFAKGF SALNNFIVNE 

       730        740        750        760        770        780 
FSGIYLDVCK DRLYCDALND SHRRASQSAM ALIAKSMLGL IAPVLTYTAD EIVEHAPSVL 

       790        800        810        820        830        840 
RNDAEDIFDF AIEPLPEIQS DFDEVYMIEA RSKFNEIVDQ LKKKKIIKSS LELVIETTSS 

       850        860        870        880        890        900 
KVLALDATER EDWFIVSGVE EEIGSKELGD FKVEGDQFII KEAILHKCPR CWKYKAKEEG 

       910 
ALCERCQKVV DGLEQAGS 

« Hide

References

[1]"Deep-sea vent epsilon-proteobacterial genomes provide insights into emergence of pathogens."
Nakagawa S., Takaki Y., Shimamura S., Reysenbach A.-L., Takai K., Horikoshi K.
Proc. Natl. Acad. Sci. U.S.A. 104:12146-12150(2007) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: SB155-2.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
AP009178 Genomic DNA. Translation: BAF70390.1.
RefSeqYP_001356747.1. NC_009662.1.

3D structure databases

ProteinModelPortalA6Q4I1.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING387092.NIS_1282.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaBAF70390; BAF70390; NIS_1282.
GeneID5361228.
KEGGnis:NIS_1282.
PATRIC22684680. VBINitSp82229_1342.

Organism-specific databases

CMRSearch...

Phylogenomic databases

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

Enzyme and pathway databases

BioCycNSP387092:GHA5-1322-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.
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_NITSB
AccessionPrimary (citable) accession number: A6Q4I1
Entry history
Integrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: August 21, 2007
Last modified: April 16, 2014
This is version 52 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