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Protein

Glutamyl-tRNA reductase

Gene

hemA

Organism
Synechocystis sp. (strain PCC 6803 / Kazusa)
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

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

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

Enzyme regulationi

Feedback inhibition by heme.

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.

Pathwayi: chlorophyll biosynthesis

This protein is involved in the pathway chlorophyll biosynthesis, which is part of Porphyrin-containing compound metabolism.UniRule annotation
View all proteins of this organism that are known to be involved in the pathway chlorophyll biosynthesis and in Porphyrin-containing compound metabolism.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Active sitei50NucleophileUniRule annotation1
Sitei99Important for activityUniRule annotation1
Binding sitei109SubstrateUniRule annotation1
Binding sitei120SubstrateUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi188 – 193NADPUniRule annotation6

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processChlorophyll biosynthesis, Porphyrin biosynthesis
LigandNADP

Enzyme and pathway databases

UniPathwayiUPA00251; UER00316
UPA00668

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:slr1808
OrganismiSynechocystis sp. (strain PCC 6803 / Kazusa)
Taxonomic identifieri1111708 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesMerismopediaceaeSynechocystis
Proteomesi
  • UP000001425 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001140791 – 427Glutamyl-tRNA reductaseAdd BLAST427

Proteomic databases

PaxDbiP28463
PRIDEiP28463

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Protein-protein interaction databases

STRINGi1148.SYNGTS_1162

Structurei

3D structure databases

ProteinModelPortaliP28463
SMRiP28463
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni49 – 52Substrate bindingUniRule annotation4
Regioni114 – 116Substrate 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

HOGENOMiHOG000109651
InParanoidiP28463
KOiK02492
OMAiFAFKCAA
PhylomeDBiP28463

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.

P28463-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MNIAVVGLSH KTAPVEIREK LSIQEAKLEE ALTHLRSYPH IEEVTVISTC
60 70 80 90 100
NRLEIYAVVT DTEKGVVEIT QFLSETGNIP LATLRRYLFT LLHEDAVRHL
110 120 130 140 150
MRVAAGLESL VLGEGQILAQ VRTTHKLGQK YKGVGRLLDR LFKQAITAGR
160 170 180 190 200
RVRTETDIGT GAVSISSAAV ELVHRQVDLS SQKTVIIGAG KMACLLVKHL
210 220 230 240 250
LAKGATDITI VNRSQRRSQD LANQFPQAQL TLCPLTDMFT AIAAGDIVFT
260 270 280 290 300
STGATEPILN CENLTGCVIN RKSLMLVDIS VPRNVAADVH AMEQVRAFNV
310 320 330 340 350
DDLKEVVAQN QASRRQMARQ AEALLEEEIA AFDLWWRSLE TVPTISSLRS
360 370 380 390 400
KVEDIREQEL EKALSRLGSE FAEKHQEVIE ALTRGIVNKI LHEPMVQLRA
410 420
QQDIEARKQC LRSLKMLFDL EVEEQFG
Length:427
Mass (Da):47,526
Last modified:December 1, 1992 - v1
Checksum:i5F5D9D744A900D7D
GO

Sequence cautioni

The sequence BAA17738 differs from that shown. Reason: Erroneous initiation.Curated

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M84218 Genomic DNA Translation: AAA27289.1
X65963 Genomic DNA Translation: CAA46779.1
BA000022 Genomic DNA Translation: BAA17738.1 Different initiation.
PIRiS77180

Genome annotation databases

EnsemblBacteriaiBAA17738; BAA17738; BAA17738
KEGGisyn:slr1808

Similar proteinsi

Entry informationi

Entry nameiHEM1_SYNY3
AccessioniPrimary (citable) accession number: P28463
Entry historyiIntegrated into UniProtKB/Swiss-Prot: December 1, 1992
Last sequence update: December 1, 1992
Last modified: March 28, 2018
This is version 138 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
  3. Synechocystis PCC 6803
    Synechocystis (strain PCC 6803): entries and gene names

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