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Protein

Glutamyl-tRNA reductase

Gene

hemA

Organism
Ignicoccus hospitalis (strain KIN4/I / DSM 18386 / JCM 14125)
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 sitei59NucleophileUniRule annotation1
Sitei106Important for activityUniRule annotation1
Binding sitei116SubstrateUniRule annotation1
Binding sitei127SubstrateUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi195 – 200NADPUniRule annotation6

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processPorphyrin biosynthesis
LigandNADP

Enzyme and pathway databases

BioCyciIHOS453591:G1G9W-532-MONOMER
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:Igni_0512
OrganismiIgnicoccus hospitalis (strain KIN4/I / DSM 18386 / JCM 14125)
Taxonomic identifieri453591 [NCBI]
Taxonomic lineageiArchaeaCrenarchaeotaThermoproteiDesulfurococcalesDesulfurococcaceaeIgnicoccus
Proteomesi
  • UP000000262 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003350901 – 441Glutamyl-tRNA reductaseAdd BLAST441

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Protein-protein interaction databases

STRINGi453591.Igni_0512

Structurei

3D structure databases

ProteinModelPortaliA8A9U3
SMRiA8A9U3
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni58 – 61Substrate bindingUniRule annotation4
Regioni121 – 123Substrate 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

eggNOGiarCOG01036 Archaea
COG0373 LUCA
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.

A8A9U3-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MPAAARVPLF VDDLVMVGVN YKTSGKELVE KAQFPDPLAA YSAISRIPAV
60 70 80 90 100
REVVLLQTCN RVEVYAITTN KKATVESIKS LLEARAGEPI PEEKFVIYYG
110 120 130 140 150
TDAVRHLFRV AAGLESMVLG EPDILRQVRE AAEFAAKEGY IGKALKLTFE
160 170 180 190 200
NAVRVGKRVR TETALGKGSI GIPSASVKLL EELIGLEGKK LLVVGAGMAG
210 220 230 240 250
RVVAVNAAKR GAKVIIVNRT LSKAKELAEE VGGEAYPLEE LPRLLREADA
260 270 280 290 300
VVVAVGGGSK VITRDAVAEV NKKLVIVDIS EPPAVDPGVS LNPYVIYKDM
310 320 330 340 350
LAVAEVANRG LEKRKSEIKR AEDIIEAELN KFVNFAQRVL ADKILRELME
360 370 380 390 400
KVEQIRINEL SKAMAKVPQE YAEVLDKMTS SLVKKVLKDV ILKVREAAGK
410 420 430 440
GDLTTLRIVA EVFDLKESLN NIEIIYDYNG VEQELKRKLE L
Length:441
Mass (Da):48,266
Last modified:October 23, 2007 - v1
Checksum:i4053407C2ACE2C4A
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000816 Genomic DNA Translation: ABU81695.1
RefSeqiWP_011998547.1, NC_009776.1

Genome annotation databases

EnsemblBacteriaiABU81695; ABU81695; Igni_0512
GeneIDi5562776
KEGGiiho:Igni_0512

Similar proteinsi

Entry informationi

Entry nameiHEM1_IGNH4
AccessioniPrimary (citable) accession number: A8A9U3
Entry historyiIntegrated into UniProtKB/Swiss-Prot: May 20, 2008
Last sequence update: October 23, 2007
Last modified: March 28, 2018
This is version 74 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, Reference proteome

Documents

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

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