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Protein

Glutamyl-tRNA reductase

Gene

hemA

Organism
Sulfolobus islandicus (strain M.14.25 / Kamchatka #1)
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

Catalyzes the NADPH-dependent reduction of glutamyl-tRNA(Glu) to glutamate 1-semialdehyde (GSA).UniRule annotation

Miscellaneous

During catalysis, the active site Cys acts as a nucleophile attacking the alpha-carbonyl group of tRNA-bound glutamate with the formation of a thioester intermediate between enzyme and glutamate, and the concomitant release of tRNA(Glu). The thioester intermediate is finally reduced by direct hydride transfer from NADPH, to form the product GSA.UniRule annotation

Catalytic activityi

L-glutamate 1-semialdehyde + NADP+ + tRNA(Glu) = L-glutamyl-tRNA(Glu) + NADPH.UniRule annotation

Pathwayi: protoporphyrin-IX biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes 5-aminolevulinate from L-glutamyl-tRNA(Glu).UniRule annotation
Proteins known to be involved in the 2 steps of the subpathway in this organism are:
  1. Glutamyl-tRNA reductase (hemA)
  2. Glutamate-1-semialdehyde 2,1-aminomutase (hemL)
This subpathway is part of the pathway protoporphyrin-IX biosynthesis, which is itself part of Porphyrin-containing compound metabolism.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes 5-aminolevulinate from L-glutamyl-tRNA(Glu), the pathway protoporphyrin-IX biosynthesis and in Porphyrin-containing compound metabolism.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Active sitei53NucleophileUniRule annotation1
Sitei100Important for activityUniRule annotation1
Binding sitei110SubstrateUniRule annotation1
Binding sitei121SubstrateUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi190 – 195NADPUniRule annotation6

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processPorphyrin biosynthesis
LigandNADP

Enzyme and pathway databases

UniPathwayiUPA00251; UER00316

Names & Taxonomyi

Protein namesi
Recommended name:
Glutamyl-tRNA reductaseUniRule annotation (EC:1.2.1.70UniRule annotation)
Short name:
GluTRUniRule annotation
Gene namesi
Name:hemAUniRule annotation
Ordered Locus Names:M1425_1955
OrganismiSulfolobus islandicus (strain M.14.25 / Kamchatka #1)
Taxonomic identifieri427317 [NCBI]
Taxonomic lineageiArchaeaCrenarchaeotaThermoproteiSulfolobalesSulfolobaceaeSulfolobus
Proteomesi
  • UP000001350 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_10002026451 – 426Glutamyl-tRNA reductaseAdd BLAST426

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliC3MYE2
SMRiC3MYE2
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni52 – 55Substrate bindingUniRule annotation4
Regioni115 – 117Substrate bindingUniRule annotation3

Domaini

Possesses an unusual extended V-shaped dimeric structure with each monomer consisting of three distinct domains arranged along a curved 'spinal' alpha-helix. The N-terminal catalytic domain specifically recognizes the glutamate moiety of the substrate. The second domain is the NADPH-binding domain, and the third C-terminal domain is responsible for dimerization.UniRule annotation

Sequence similaritiesi

Belongs to the glutamyl-tRNA reductase family.UniRule annotation

Phylogenomic databases

HOGENOMiHOG000107850
KOiK02492
OMAiFAFKCAA
OrthoDBiPOG093Z06M3

Family and domain databases

Gene3Di3.30.460.30, 1 hit
HAMAPiMF_00087 Glu_tRNA_reductase, 1 hit
InterProiView protein in InterPro
IPR000343 4pyrrol_synth_GluRdtase
IPR015896 4pyrrol_synth_GluRdtase_dimer
IPR015895 4pyrrol_synth_GluRdtase_N
IPR018214 GluRdtase_CS
IPR036453 GluRdtase_dimer_dom_sf
IPR036343 GluRdtase_N_sf
IPR036291 NAD(P)-bd_dom_sf
IPR006151 Shikm_DH/Glu-tRNA_Rdtase
PfamiView protein in Pfam
PF00745 GlutR_dimer, 1 hit
PF05201 GlutR_N, 1 hit
PF01488 Shikimate_DH, 1 hit
PIRSFiPIRSF000445 4pyrrol_synth_GluRdtase, 1 hit
SUPFAMiSSF51735 SSF51735, 1 hit
SSF69075 SSF69075, 1 hit
SSF69742 SSF69742, 1 hit
TIGRFAMsiTIGR01035 hemA, 1 hit
PROSITEiView protein in PROSITE
PS00747 GLUTR, 1 hit

Sequencei

Sequence statusi: Complete.

C3MYE2-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MTSNEELLQN YCSILFTYKT IGISNLHLYY FRETEIKSLR QLINAEFAIL
60 70 80 90 100
QTCNRVEIYL YSNTNTISEI NKMIQYLNNV HNEPIGNQAR VICGKDSIKH
110 120 130 140 150
LFLVASGADS LSIGEYEILS QIRSTIDMFK KLGFSGKYLQ ILFERAIKVG
160 170 180 190 200
RKVREETSIS KGKVGIYSLA IDEAKRQFNN FYDRKIVIVG AGEMGQKIAN
210 220 230 240 250
MLYNEGVKNV TIMNRTVEKA KQLALKFGYN YEKLDLDKLG SFDIAFISIS
260 270 280 290 300
HENLRLENKW NTLIVDITVP PLFTGNNVIT LEELEKISKL NFKAREEELV
310 320 330 340 350
KINKLVEDGI DELIYDYKKE IYSEFMSKIM KRVETIRENE IVRAYKELEK
360 370 380 390 400
LGINNQQVKE ILDLMTRSII KKSFQPLFDN VRSLVFDGEN SINYINFLID
410 420
IFKDGNIPIF ETKKIKKKQI SKRSSS
Length:426
Mass (Da):49,336
Last modified:June 16, 2009 - v1
Checksum:i1C84F982D5E3DF96
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP001400 Genomic DNA Translation: ACP38699.1
RefSeqiWP_012711926.1, NC_012588.1

Genome annotation databases

EnsemblBacteriaiACP38699; ACP38699; M1425_1955
GeneIDi8762061
KEGGisia:M1425_1955

Similar proteinsi

Entry informationi

Entry nameiHEM1_SULIM
AccessioniPrimary (citable) accession number: C3MYE2
Entry historyiIntegrated into UniProtKB/Swiss-Prot: September 22, 2009
Last sequence update: June 16, 2009
Last modified: March 28, 2018
This is version 59 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

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