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Protein

Glutamyl-tRNA reductase 1, chloroplastic

Gene

HEMA1

Organism
Hordeum vulgare (Barley)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

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

Catalytic activityi

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

Pathwayi: protoporphyrin-IX biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes 5-aminolevulinate from L-glutamyl-tRNA(Glu).
Proteins known to be involved in the 2 steps of the subpathway in this organism are:
  1. Glutamyl-tRNA reductase 2 (HEMA2), Glutamyl-tRNA reductase 1, chloroplastic (HEMA1), Glutamyl-tRNA reductase 3, chloroplastic (HEMA3), Glutamyl-tRNA reductase (hemA1)
  2. Glutamate-1-semialdehyde 2,1-aminomutase, chloroplastic (GSA)
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 sitei125NucleophileBy similarity1
Sitei174Important for activityBy similarity1
Binding sitei184SubstrateBy similarity1
Binding sitei195SubstrateBy similarity1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi266 – 271NADPBy similarity6

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

Chlorophyll biosynthesis, Porphyrin biosynthesis

Keywords - Ligandi

NADP

Enzyme and pathway databases

BRENDAi1.2.1.70. 2687.
UniPathwayiUPA00251; UER00316.

Names & Taxonomyi

Protein namesi
Recommended name:
Glutamyl-tRNA reductase 1, chloroplastic (EC:1.2.1.70)
Short name:
GluTR
Gene namesi
Name:HEMA1
OrganismiHordeum vulgare (Barley)
Taxonomic identifieri4513 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaPoalesPoaceaeBOP cladePooideaeTriticodaeTriticeaeHordeinaeHordeum

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Chloroplast, Plastid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transit peptidei1 – 43Chloroplast1 PublicationAdd BLAST43
ChainiPRO_000001331144 – 527Glutamyl-tRNA reductase 1, chloroplasticAdd BLAST484

Interactioni

Subunit structurei

Homodimer.1 Publication

Protein-protein interaction databases

STRINGi4513.MLOC_39270.1.

Structurei

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1B29model-A76-460[»]
1B61model-A76-460[»]
ProteinModelPortaliQ42843.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni124 – 127Substrate bindingBy similarity4
Regioni189 – 191Substrate bindingBy similarity3

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Compositional biasi286 – 289Poly-Val4

Sequence similaritiesi

Belongs to the glutamyl-tRNA reductase family.Curated

Keywords - Domaini

Transit peptide

Phylogenomic databases

eggNOGiENOG410IGX5. Eukaryota.
COG0373. LUCA.
KOiK02492.

Family and domain databases

Gene3Di3.40.50.720. 1 hit.
HAMAPiMF_00087. Glu_tRNA_reductase. 1 hit.
InterProiIPR000343. 4pyrrol_synth_GluRdtase.
IPR015896. 4pyrrol_synth_GluRdtase_dimer.
IPR015895. 4pyrrol_synth_GluRdtase_N.
IPR018214. GluRdtase_CS.
IPR016040. NAD(P)-bd_dom.
IPR006151. Shikm_DH/Glu-tRNA_Rdtase.
[Graphical view]
PfamiPF00745. GlutR_dimer. 1 hit.
PF05201. GlutR_N. 1 hit.
PF01488. Shikimate_DH. 1 hit.
[Graphical view]
SUPFAMiSSF51735. SSF51735. 1 hit.
SSF69075. SSF69075. 1 hit.
SSF69742. SSF69742. 1 hit.
TIGRFAMsiTIGR01035. hemA. 1 hit.
PROSITEiPS00747. GLUTR. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

Q42843-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAGATSATAA AGAFAAAKAR GPAAACPWLV AAGGRRRSGV VRCDAGGDAQ
60 70 80 90 100
AASKAASITA LEQFKISADR YMKEKSSIAV IGLSVHTAPV EMREKLAVAE
110 120 130 140 150
ELWPRAISEL TSLNHIEEAA VLSTCNRMEI YVVALSWNRG IREVVDWMSK
160 170 180 190 200
KSGIPASELR EHLFMLRDSD ATRHLFEVSA GLDSLVLGEG QILAQVKQVV
210 220 230 240 250
RNGQNSGGLG KNIDRMFKDA ITAGKRVRCE TNISAGAVSV SSAAVELAMM
260 270 280 290 300
KLPKSECLSA RMLLIGAGKM GKLVVKHLIA KGCKKVVVVN RSVERVDAIR
310 320 330 340 350
EEMKDIEIVY RPLTEMYEAA ADADVVFTST ASESLLFTKE HAEVLPPISL
360 370 380 390 400
AMGGVRLFVD ISVPRNVGAC LSEVEHARVY NVDDLKEVVE ANKEDRVRKA
410 420 430 440 450
MEAQTIITQE LKRFEAWRDS LETVPTIKKL RSYADRIRAS ELEKCLQKIG
460 470 480 490 500
EDNLNKKMRR SIEELSTGIV NKLLHGPLQH LRCDGSDSRT LDETLENMHA
510 520
LNRMFSLDTE KAVLEQKIKA KVEKTQS
Length:527
Mass (Da):57,653
Last modified:November 1, 1997 - v1
Checksum:iD329E56458BE1165
GO

Sequence cautioni

The sequence CAA60054 differs from that shown. Reason: Erroneous initiation.Curated

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X92403 mRNA. Translation: CAA63140.1.
X86101 mRNA. Translation: CAA60054.1. Different initiation.
PIRiT05732.

Genome annotation databases

KEGGiag:CAA63140.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X92403 mRNA. Translation: CAA63140.1.
X86101 mRNA. Translation: CAA60054.1. Different initiation.
PIRiT05732.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1B29model-A76-460[»]
1B61model-A76-460[»]
ProteinModelPortaliQ42843.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi4513.MLOC_39270.1.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

KEGGiag:CAA63140.

Phylogenomic databases

eggNOGiENOG410IGX5. Eukaryota.
COG0373. LUCA.
KOiK02492.

Enzyme and pathway databases

UniPathwayiUPA00251; UER00316.
BRENDAi1.2.1.70. 2687.

Family and domain databases

Gene3Di3.40.50.720. 1 hit.
HAMAPiMF_00087. Glu_tRNA_reductase. 1 hit.
InterProiIPR000343. 4pyrrol_synth_GluRdtase.
IPR015896. 4pyrrol_synth_GluRdtase_dimer.
IPR015895. 4pyrrol_synth_GluRdtase_N.
IPR018214. GluRdtase_CS.
IPR016040. NAD(P)-bd_dom.
IPR006151. Shikm_DH/Glu-tRNA_Rdtase.
[Graphical view]
PfamiPF00745. GlutR_dimer. 1 hit.
PF05201. GlutR_N. 1 hit.
PF01488. Shikimate_DH. 1 hit.
[Graphical view]
SUPFAMiSSF51735. SSF51735. 1 hit.
SSF69075. SSF69075. 1 hit.
SSF69742. SSF69742. 1 hit.
TIGRFAMsiTIGR01035. hemA. 1 hit.
PROSITEiPS00747. GLUTR. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiHEM11_HORVU
AccessioniPrimary (citable) accession number: Q42843
Secondary accession number(s): Q42844
Entry historyi
Integrated into UniProtKB/Swiss-Prot: November 1, 1997
Last sequence update: November 1, 1997
Last modified: June 8, 2016
This is version 112 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Miscellaneous

Was shown to bind heme, but the precise role of heme is unclear.
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 (By similarity).By similarity

Keywords - Technical termi

3D-structure, Direct protein sequencing

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  3. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.