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Q6LX78 (SYI_METMP) 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:MMP1474
OrganismMethanococcus maripaludis (strain S2 / LL) [Complete proteome] [HAMAP]
Taxonomic identifier267377 [NCBI]
Taxonomic lineageArchaeaEuryarchaeotaMethanococciMethanococcalesMethanococcaceaeMethanococcus

Protein attributes

Sequence length1034 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_02003

Catalytic activity

ATP + L-isoleucine + tRNA(Ile) = AMP + diphosphate + L-isoleucyl-tRNA(Ile). HAMAP-Rule MF_02003

Cofactor

Zinc By similarity. HAMAP-Rule MF_02003

Subunit structure

Monomer By similarity. HAMAP-Rule MF_02003

Subcellular location

Cytoplasm By similarity HAMAP-Rule MF_02003.

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_02003

Sequence similarities

Belongs to the class-I aminoacyl-tRNA synthetase family. IleS type 2 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 – 10341034Isoleucine--tRNA ligase HAMAP-Rule MF_02003
PRO_0000098581

Regions

Motif46 – 5611"HIGH" region HAMAP-Rule MF_02003
Motif598 – 6025"KMSKS" region HAMAP-Rule MF_02003

Sites

Binding site6011ATP By similarity

Sequences

Sequence LengthMass (Da)Tools
Q6LX78 [UniParc].

Last modified July 5, 2004. Version 1.
Checksum: A9C573A4C0E3ECB8

FASTA1,034119,910
        10         20         30         40         50         60 
MKQVKSVNFR ELDKKVKEYW KKENTYKKVK ALNEHGPEYY FVDGPPYCSG AIHLGTAWNK 

        70         80         90        100        110        120 
IIKDTVLRFK RIQGYNVLDK AGWDMHGLPI EVKVENEFNI GSKKDIETKI GTQEFINKCK 

       130        140        150        160        170        180 
EFALNHLGHM QGQFENLGVW LDFENAYMPI KRDYMEMGWW TLKKAHEKEL LTKDLRSGYW 

       190        200        210        220        230        240 
CPRCETSLAE HEVRGEYKEV LDPSVYVKFK LEKSDEYITI WTTTPWTLPS NMLVCVNPEF 

       250        260        270        280        290        300 
DYAYVNVEFE NGTAETWIIA EKLVNDVMKK AEKNNDISKF SISKVVKGDS LIGLKYIHPL 

       310        320        330        340        350        360 
LEENEKQQEF AKIENVHTIV PGDHVTLEGG TGLVHTAPGF GEDDFNIGKE HNIPVYAPID 

       370        380        390        400        410        420 
DNGKYTDSIW KGTFVKDMDE SVIETLISKN LLVNSGKVKH TYPHCWRCKT PLLFRATEQW 

       430        440        450        460        470        480 
FLSISKIKDS IIEQGKTVDW VPDWVKTRYV NGVSFVGDWN ISRQRYWGIP LPIWICEECG 

       490        500        510        520        530        540 
NYEVIGSVDE LKERANEKDV DLSDIHKPAV DKITLTCSCG GKMKRTPDVL DVWYDSGLAP 

       550        560        570        580        590        600 
YASIGSKKLK KAQFITEGND QVTKWFYSQH ALSAVVFDDT SYEKCMMHGF TLDETGEKMS 

       610        620        630        640        650        660 
KSLGNIVSPD DVTEQYGADV LRFYLLSANK AWEDLRFSYS EMDETRSMLN TLWNSYAFSA 

       670        680        690        700        710        720 
NYMVLDDFVP NNEYFKHVKD EDAWILSRIN TVAKEAVEAL EKPHLHVYTW ALRDFILNDF 

       730        740        750        760        770        780 
SRWYIKLIRD RTWMEKNDVQ KLSAYQTLYY VIMKLISIMA PVTPHLSEEI YQNLKTEDMP 

       790        800        810        820        830        840 
ESIFMNKLTI ESEFINETLE KDTEIIREIV DSILKGRDKA KYTLRYPITK ITLPENIAET 

       850        860        870        880        890        900 
VEKYGYIIKE QGNVKEIELK EFEGNITVKP NFKELGKIFR SDVPKVVAAI NSVAPNELKE 

       910        920        930        940        950        960 
KLKSGNFEVS EYEIKPEYVE FRVEIPENIV GVEFSKGNVY INIEMNDEVI KEGLVREVVR 

       970        980        990       1000       1010       1020 
RIQSMRKDMD LDINEKINVK LEGIDFSSDY LSHIANEVRG NFVESLKSDY NQKWTIKTPN 

      1030 
EETYDISIDI EKNK 

« Hide

References

[1]"Complete genome sequence of the genetically tractable hydrogenotrophic methanogen Methanococcus maripaludis."
Hendrickson E.L., Kaul R., Zhou Y., Bovee D., Chapman P., Chung J., Conway de Macario E., Dodsworth J.A., Gillett W., Graham D.E., Hackett M., Haydock A.K., Kang A., Land M.L., Levy R., Lie T.J., Major T.A., Moore B.C. expand/collapse author list , Porat I., Palmeiri A., Rouse G., Saenphimmachak C., Soell D., Van Dien S., Wang T., Whitman W.B., Xia Q., Zhang Y., Larimer F.W., Olson M.V., Leigh J.A.
J. Bacteriol. 186:6956-6969(2004) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: S2 / LL.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
BX950229 Genomic DNA. Translation: CAF31030.1.
RefSeqNP_988594.1. NC_005791.1.

3D structure databases

ProteinModelPortalQ6LX78.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING267377.MMP1474.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaCAF31030; CAF31030; MMP1474.
GeneID2761573.
KEGGmmp:MMP1474.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0060.
HOGENOMHOG000246403.
KOK01870.
OMAGARDWCI.
ProtClustDBPRK06039.

Enzyme and pathway databases

BioCycMMAR267377:GJ77-1512-MONOMER.

Family and domain databases

Gene3D1.10.730.10. 1 hit.
3.40.50.620. 2 hits.
3.90.740.10. 1 hit.
HAMAPMF_02003. Ile_tRNA_synth_type2.
InterProIPR001412. aa-tRNA-synth_I_CS.
IPR002300. aa-tRNA-synth_Ia.
IPR002301. Ile-tRNA-ligase.
IPR023585. Ile-tRNA-ligase_type1.
IPR023586. Ile-tRNA-ligase_type2.
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_METMP
AccessionPrimary (citable) accession number: Q6LX78
Entry history
Integrated into UniProtKB/Swiss-Prot: December 20, 2005
Last sequence update: July 5, 2004
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