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Q5N3B4 (HEM1_SYNP6) Reviewed, UniProtKB/Swiss-Prot

Last modified February 19, 2014. Version 73. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | Third-party data text xml rdf/xml gff fasta
to top of pageNames·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order

Names and origin

Protein namesRecommended name:
Glutamyl-tRNA reductase

Short name=GluTR
EC=1.2.1.70
Gene names
Name:hemA
Ordered Locus Names:syc1016_d
OrganismSynechococcus sp. (strain ATCC 27144 / PCC 6301 / SAUG 1402/1) (Anacystis nidulans) [Complete proteome] [HAMAP]
Taxonomic identifier269084 [NCBI]
Taxonomic lineageBacteriaCyanobacteriaOscillatoriophycideaeChroococcalesSynechococcus

Protein attributes

Sequence length438 AA.
Sequence statusComplete.
Protein existenceInferred from homology

General annotation (Comments)

Function

Catalyzes the NADPH-dependent reduction of glutamyl-tRNA(Glu) to glutamate 1-semialdehyde (GSA) By similarity. HAMAP-Rule MF_00087

Catalytic activity

L-glutamate 1-semialdehyde + NADP+ + tRNA(Glu) = L-glutamyl-tRNA(Glu) + NADPH. HAMAP-Rule MF_00087

Pathway

Porphyrin-containing compound metabolism; protoporphyrin-IX biosynthesis; 5-aminolevulinate from L-glutamyl-tRNA(Glu): step 1/2. HAMAP-Rule MF_00087

Porphyrin-containing compound metabolism; chlorophyll biosynthesis. HAMAP-Rule MF_00087

Subunit structure

Homodimer By similarity. HAMAP-Rule MF_00087

Domain

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 By similarity. HAMAP-Rule MF_00087

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 By similarity.

Sequence similarities

Belongs to the glutamyl-tRNA reductase family.

Ontologies

Keywords
   Biological processChlorophyll biosynthesis
Porphyrin biosynthesis
   LigandNADP
   Molecular functionOxidoreductase
   Technical termComplete proteome
Gene Ontology (GO)
   Biological_processchlorophyll biosynthetic process

Inferred from electronic annotation. Source: UniProtKB-HAMAP

protoporphyrinogen IX biosynthetic process

Inferred from electronic annotation. Source: UniProtKB-UniPathway

   Molecular_functionNADP binding

Inferred from electronic annotation. Source: InterPro

glutamyl-tRNA reductase activity

Inferred from electronic annotation. Source: UniProtKB-HAMAP

Complete GO annotation...

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 438438Glutamyl-tRNA reductase HAMAP-Rule MF_00087
PRO_1000004709

Regions

Nucleotide binding197 – 2026NADP By similarity
Region49 – 524Substrate binding By similarity
Region114 – 1163Substrate binding By similarity

Sites

Active site501Nucleophile By similarity
Binding site1091Substrate By similarity
Binding site1201Substrate By similarity
Site991Important for activity By similarity

Sequences

Sequence LengthMass (Da)Tools
Q5N3B4 [UniParc].

Last modified February 1, 2005. Version 1.
Checksum: A43002486A81F746

FASTA43848,445
        10         20         30         40         50         60 
MHLAVVGLSH RTAPVAVREK LSIPEQQVEA AIQQLKSYPH IEEVAILSTC NRLEIYCVTR 

        70         80         90        100        110        120 
ATEPGVREIT QFLSEHSHLP LGELRPHLFV LLHQDAVMHL MRVAAGLDSL VLGEGQILSQ 

       130        140        150        160        170        180 
VKTMYKLGQQ YEGVGRILNR LLKQAVTAGK RVRTETSIGT GAVSISSAAV ELAQLKVIAR 

       190        200        210        220        230        240 
DDRSDGNLAG QRVLILGAGK MSRLLVQHLI AKGADTIQIL NRTLGRAEEL AKQYGGDLQI 

       250        260        270        280        290        300 
QVGLLSGLMN AIVEADIVFT STSATDPILD RAKLEMVLAP EQRLMLIDIA VPRNVAADVV 

       310        320        330        340        350        360 
ELTSVESYNV DDLREVVAQN QESRRKLAEE AEALLEEEVD AFDNWWQSLD TVPTINCLRD 

       370        380        390        400        410        420 
KIEMIREQEL EKALSRLGTE FGDKHQAVVE ALTRGIVNKI LHDPMVQLRS QQDIEARRRA 

       430 
VDALQMLFNL DPQGQLSS 

« Hide

References

[1]"Complete nucleotide sequence of the freshwater unicellular cyanobacterium Synechococcus elongatus PCC 6301 chromosome: gene content and organization."
Sugita C., Ogata K., Shikata M., Jikuya H., Takano J., Furumichi M., Kanehisa M., Omata T., Sugiura M., Sugita M.
Photosyn. Res. 93:55-67(2007) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: ATCC 27144 / PCC 6301 / SAUG 1402/1.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
AP008231 Genomic DNA. Translation: BAD79206.1.
RefSeqYP_171726.1. NC_006576.1.

3D structure databases

ProteinModelPortalQ5N3B4.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING269084.syc1016_d.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaBAD79206; BAD79206; syc1016_d.
GeneID3199869.
KEGGsyc:syc1016_d.
PATRIC32487844. VBISynElo117686_1182.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0373.
HOGENOMHOG000109651.
KOK02492.
OMARTEIYCA.
OrthoDBEOG6MWNBM.
ProtClustDBPRK00045.

Enzyme and pathway databases

BioCycSELO269084:GCDQ-1040-MONOMER.
UniPathwayUPA00251; UER00316.
UPA00668.

Family and domain databases

Gene3D3.40.50.720. 1 hit.
HAMAPMF_00087. Glu_tRNA_reductase.
InterProIPR000343. 4pyrrol_synth_GluRdtase.
IPR015896. 4pyrrol_synth_GluRdtase_dimer.
IPR015895. 4pyrrol_synth_GluRdtase_N.
IPR016040. NAD(P)-bd_dom.
IPR018214. Pyrrol_synth_GluRdtase_CS.
IPR006151. Shikm_DH/Glu-tRNA_Rdtase.
[Graphical view]
PfamPF00745. GlutR_dimer. 1 hit.
PF05201. GlutR_N. 1 hit.
PF01488. Shikimate_DH. 1 hit.
[Graphical view]
PIRSFPIRSF000445. 4pyrrol_synth_GluRdtase. 1 hit.
SUPFAMSSF69075. SSF69075. 1 hit.
SSF69742. SSF69742. 1 hit.
TIGRFAMsTIGR01035. hemA. 1 hit.
PROSITEPS00747. GLUTR. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry nameHEM1_SYNP6
AccessionPrimary (citable) accession number: Q5N3B4
Entry history
Integrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: February 1, 2005
Last modified: February 19, 2014
This is version 73 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

PATHWAY comments

Index of metabolic and biosynthesis pathways