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Protein

Isoleucine--tRNA ligase

Gene

ileS

Organism
Listeria monocytogenes serotype 4b (strain F2365)
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

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).UniRule annotation

Catalytic activityi

ATP + L-isoleucine + tRNA(Ile) = AMP + diphosphate + L-isoleucyl-tRNA(Ile).UniRule annotation

Cofactori

Zn2+UniRule annotationNote: Binds 1 zinc ion per subunit.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei552Aminoacyl-adenylateUniRule annotation1
Binding sitei596ATPUniRule annotation1
Metal bindingi888ZincUniRule annotation1
Metal bindingi891ZincUniRule annotation1
Metal bindingi908ZincUniRule annotation1
Metal bindingi911ZincUniRule annotation1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionAminoacyl-tRNA synthetase, Ligase
Biological processProtein biosynthesis
LigandATP-binding, Metal-binding, Nucleotide-binding, Zinc

Names & Taxonomyi

Protein namesi
Recommended name:
Isoleucine--tRNA ligaseUniRule annotation (EC:6.1.1.5UniRule annotation)
Alternative name(s):
Isoleucyl-tRNA synthetaseUniRule annotation
Short name:
IleRSUniRule annotation
Gene namesi
Name:ileSUniRule annotation
Ordered Locus Names:LMOf2365_2044
OrganismiListeria monocytogenes serotype 4b (strain F2365)
Taxonomic identifieri265669 [NCBI]
Taxonomic lineageiBacteriaFirmicutesBacilliBacillalesListeriaceaeListeria

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000984121 – 921Isoleucine--tRNA ligaseAdd BLAST921

Interactioni

Subunit structurei

Monomer.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliQ71Y01
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Motifi57 – 67"HIGH" regionAdd BLAST11
Motifi593 – 597"KMSKS" region5

Domaini

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)).UniRule annotation

Sequence similaritiesi

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

Phylogenomic databases

HOGENOMiHOG000246402
KOiK01870
OMAiHLGTAWN

Family and domain databases

CDDicd07960 Anticodon_Ia_Ile_BEm, 1 hit
Gene3Di3.40.50.620, 2 hits
3.90.740.10, 1 hit
HAMAPiMF_02002 Ile_tRNA_synth_type1, 1 hit
InterProiView protein in InterPro
IPR001412 aa-tRNA-synth_I_CS
IPR002300 aa-tRNA-synth_Ia
IPR033708 Anticodon_Ile_BEm
IPR002301 Ile-tRNA-ligase
IPR023585 Ile-tRNA-ligase_type1
IPR013155 M/V/L/I-tRNA-synth_anticd-bd
IPR014729 Rossmann-like_a/b/a_fold
IPR009080 tRNAsynth_Ia_anticodon-bd
IPR009008 Val/Leu/Ile-tRNA-synth_edit
IPR010663 Znf_FPG/IleRS
PfamiView protein in Pfam
PF08264 Anticodon_1, 1 hit
PF00133 tRNA-synt_1, 1 hit
PF06827 zf-FPG_IleRS, 1 hit
PRINTSiPR00984 TRNASYNTHILE
SUPFAMiSSF47323 SSF47323, 1 hit
SSF50677 SSF50677, 1 hit
TIGRFAMsiTIGR00392 ileS, 1 hit
PROSITEiView protein in PROSITE
PS00178 AA_TRNA_LIGASE_I, 1 hit

Sequencei

Sequence statusi: Complete.

Q71Y01-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MEYKDTLLMP KTDFPMRGNL PNKEPEWQAK WEEEKLYEKI QEKNAGRKAY
60 70 80 90 100
ILHDGPPYAN GELHMGHALN KTIKDIIVRY KSMAGFSSPY VPGWDTHGLP
110 120 130 140 150
IETAIAKKGV KRKEMSIAEF RKLCAEYAMT QVDGQRTGFK RLGINGDWEN
160 170 180 190 200
PYITLLPEYE AEQIKVFGEM AKKGYIYKGK KPVYWSPSSE SALAEAEIEY
210 220 230 240 250
QDKKSASIFV AFKVTDGKGV LDEGTNIVIW TTTPWTIPAN MGITVNPDLD
260 270 280 290 300
YVVIESAGEK YVVAEALLPS LREKLGFEDA TVVKTVRGSE LDRVVTKHPF
310 320 330 340 350
YDRDSLVMNG EHATAEAGTG AVHTAPGHGE DDFLIGKKYD LEVLAPLDDR
360 370 380 390 400
GVFTEEAPGF EGVFYDTANK MVTEKLEEVG ALLKMEFITH SYPHDWRTKK
410 420 430 440 450
PVIFRATAQW FASIDAFRDD LLAAVKGVNW TPAWGETRLF NMVRDRGDWV
460 470 480 490 500
ISRQRAWGVP LPIFYAENGE AIITDETINH ISELFREHGS NVWFERDVKD
510 520 530 540 550
LLPAGFTHPG SPNGEFTKET DIMDVWFDSG SSHQAVLNAR PELSRPADLY
560 570 580 590 600
MEGSDQYRGW FNSSLTTAVA ITGEAPYRNV LSHGFALDGE GRKMSKSLGN
610 620 630 640 650
TLLPGKVIKQ LGADIVRLWV ASVDYQADVR VSDEILKQVS EVYRKIRNTM
660 670 680 690 700
RFLLGNINDF NPTTNAVSYE NLREVDKYML IKLNDLVKNV KDNYEAFEFS
710 720 730 740 750
TIYHQINNFC TVELSQFYMD FAKDVVYIEA ADSHDRRAMQ TVFYEAVVTL
760 770 780 790 800
TKLLAPILPH TTEEVWNSLI GEGVESIHLQ DLPEVKVLAD SEEITAKWDA
810 820 830 840 850
FMQIRDNVQK ALEFARNEKL IGKSMLAKVT LYVDGEAKTL FDSLEGDFAQ
860 870 880 890 900
LFIVSDFELV EGLENAPESA FKSNQVAVQI TVAEGETCER CRVVKKDVGV
910 920
NPKHPTLCGR CADIVVKHYE A
Length:921
Mass (Da):103,878
Last modified:July 5, 2004 - v1
Checksum:i8018C3A3CCBF3ABF
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AE017262 Genomic DNA Translation: AAT04814.1
RefSeqiWP_003727956.1, NC_002973.6

Genome annotation databases

EnsemblBacteriaiAAT04814; AAT04814; LMOf2365_2044
KEGGilmf:LMOf2365_2044

Similar proteinsi

Entry informationi

Entry nameiSYI_LISMF
AccessioniPrimary (citable) accession number: Q71Y01
Entry historyiIntegrated into UniProtKB/Swiss-Prot: December 20, 2005
Last sequence update: July 5, 2004
Last modified: March 28, 2018
This is version 93 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health