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Q5L5L0 (SYI_CHLAB) Reviewed, UniProtKB/Swiss-Prot

Last modified May 1, 2013. Version 57. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | Third-party data text xml rdf/xml gff fasta
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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:CAB634
OrganismChlamydophila abortus (strain S26/3) [Complete proteome] [HAMAP]
Taxonomic identifier218497 [NCBI]
Taxonomic lineageBacteria › Chlamydiae › Chlamydiales › Chlamydiaceae › Chlamydia/Chlamydophila group › Chlamydophila ›

Protein attributes

Sequence length1043 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.

Subunit structure

Monomer By similarity.

Subcellular location

Cytoplasm By similarity.

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.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 10431043Isoleucine--tRNA ligase HAMAP-Rule MF_02003
PRO_0000098530

Regions

Motif49 – 5911"HIGH" region HAMAP-Rule MF_02003
Motif592 – 5965"KMSKS" region HAMAP-Rule MF_02003

Sites

Binding site5951ATP By similarity

Sequences

Sequence LengthMass (Da)Tools
Q5L5L0 [UniParc].

Last modified June 21, 2005. Version 1.
Checksum: 331B040D1C6F5114

FASTA1,043119,728
        10         20         30         40         50         60 
MHTEGEGSKE SLASREERIL NFWKTQEIFQ KSLKNREGRT LYSFYDGPPF ATGLPHYGHL 

        70         80         90        100        110        120 
LAGTIKDVVG RFATMDGYYV PRRFGWDCHG VPVEYEVEKS LNLTTPGAIE DFGVAKFNEE 

       130        140        150        160        170        180 
CRKIVFRYVD EWEHYIYRVG RWVDFSATWK TMDASFMESV WWVFRSLYDQ GLVYEGVKVV 

       190        200        210        220        230        240 
PFSTKLGTPL SNFEAGQNYK EVDDPSVVIK FALHGDPGSL LVWTTTPWTL VSNMAVAVGP 

       250        260        270        280        290        300 
EITYVRVADK VSGEQWILGQ GCLSRWFSDP DTYEVIESFP GTALIGKSYE PPFNFFEQKR 

       310        320        330        340        350        360 
AEGAYTILPG SFVEESEGTG VVHMAPAFGE ADFFVCKEHH VPMVCPVDNH GCFTEEIPEY 

       370        380        390        400        410        420 
QGQYIKSCDK GIIKSLKNQG KVFYHGTVVH RYPFCWRTDT PLIYKTVNSW FISVEKIKDK 

       430        440        450        460        470        480 
MLQANKKIHW VPEHIKEGRF GKWLEGARDW AISRNRYWGT PIPVWKSKDG DILVIGSVEE 

       490        500        510        520        530        540 
LEKLTGEKVS DLHCHFVDQL KIEKDGKSFH RVPYVFDCWF DSGAMPYAQN HYPFENQKET 

       550        560        570        580        590        600 
ESGFPADFIA EGLDQTRGWF YTLTVISAAL FDQPVFKNAI VNGIVLAEDG NKMSKRLNNY 

       610        620        630        640        650        660 
PSPMSIMNTY GADALRLYLL DSVVVKAEDL RFSDKGVESV LKQVLLPLTN VLSFFKTYTD 

       670        680        690        700        710        720 
LYGFDANNYD KEEISYSEID RWILSNLYTV VGKVRESMSS YNLNTAVNPF VTFIDDLTNW 

       730        740        750        760        770        780 
YIRRCRRRFW ESADTPDRRA AFATLYEVLT VFCRVIAPFI PFISEDIYQQ IKTENSLESV 

       790        800        810        820        830        840 
HLCDFPYIDL AKVFPDLEQR MGDAREIVGL GHSLRKEHKL KVRQPLANFY VVGPKDRLDQ 

       850        860        870        880        890        900 
LDSFKQLISE ELNVKNIVFY KEAPSFVKTT VKPNFRSLGR RVGEKIKDIQ KALASLSQAQ 

       910        920        930        940        950        960 
IQQLLTQEYL SLNLGSEEIV LHMEDVLISW ETDPGYVARS SSLFTVVLDC QLTEELVVEA 

       970        980        990       1000       1010       1020 
ISRELVNKIN TMRRNQKLHV SDRIVLRMQT SEEVRKAFLH YADYICEETL TTQSEFADVL 

      1030       1040 
EGEEWDINGH PTVIAIEVAA RPH

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References

[1]"The Chlamydophila abortus genome sequence reveals an array of variable proteins that contribute to interspecies variation."
Thomson N.R., Yeats C., Bell K., Holden M.T.G., Bentley S.D., Livingstone M., Cerdeno-Tarraga A.-M., Harris B., Doggett J., Ormond D., Mungall K., Clarke K., Feltwell T., Hance Z., Sanders M., Quail M.A., Price C., Barrell B.G., Parkhill J., Longbottom D.
Genome Res. 15:629-640(2005) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: S26/3.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ		CR848038 Genomic DNA. Translation: CAH64081.1.
RefSeqYP_220032.1. NC_004552.2.

3D structure databases

ProteinModelPortalQ5L5L0.
ModBaseSearch...

Protein-protein interaction databases

STRING218497.CAB634.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaCAH64081; CAH64081; CAB634.
GeneID3337999.
KEGGcab:CAB634.
PATRIC20202779. VBIChlAbo21869_0696.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0060.
HOGENOMHOG000246403.
KOK01870.
OMASRSRYWG.
ProtClustDBPRK06039.

Enzyme and pathway databases

BioCycCABO218497:GJB0-650-MONOMER.

Family and domain databases

Gene3D3.40.50.620. 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.
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]
PfamPF08264. Anticodon_1. 1 hit.
PF00133. tRNA-synt_1. 1 hit.
[Graphical view]
PRINTSPR00984. TRNASYNTHILE.
SUPFAMSSF47323. tRNAsyn_1a_bind. 1 hit.
SSF50677. ValRS_IleRS_edit. 1 hit.
TIGRFAMsTIGR00392. ileS. 1 hit.
PROSITEPS00178. AA_TRNA_LIGASE_I. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry nameSYI_CHLAB
AccessionPrimary (citable) accession number: Q5L5L0
Entry history
Integrated into UniProtKB/Swiss-Prot: December 20, 2005
Last sequence update: June 21, 2005
Last modified: May 1, 2013
This is version 57 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

Aminoacyl-tRNA synthetases

List of aminoacyl-tRNA synthetase entries

SIMILARITY comments

Index of protein domains and families

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