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Q2JJG8 (HEM1_SYNJB) Reviewed, UniProtKB/Swiss-Prot

Last modified February 19, 2014. Version 70. 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:CYB_2258
OrganismSynechococcus sp. (strain JA-2-3B'a(2-13)) (Cyanobacteria bacterium Yellowstone B-Prime) [Complete proteome] [HAMAP]
Taxonomic identifier321332 [NCBI]
Taxonomic lineageBacteriaCyanobacteriaOscillatoriophycideaeChroococcalesSynechococcus

Protein attributes

Sequence length431 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 – 431431Glutamyl-tRNA reductase HAMAP-Rule MF_00087
PRO_1000004708

Regions

Nucleotide binding189 – 1946NADP 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
Q2JJG8 [UniParc].

Last modified March 7, 2006. Version 1.
Checksum: C34C228554FDB259

FASTA43148,026
        10         20         30         40         50         60 
MFIAVVGLSH RTAPVEIRER LSIAEAEVGE TIQQLRTHPH IEEAAILSTC NRLEVYIVTS 

        70         80         90        100        110        120 
EMESGVRQTM QFLAELKGIP LPQLRPHLFT LLYQDAVTHL MRVAAGLDSL VLGEGQILSQ 

       130        140        150        160        170        180 
VKKAQQLGQA CNGMDRILNR LFKAAITAGK RVRTETEIGT GAMSISSAAV ELALQEQGSL 

       190        200        210        220        230        240 
SQGKVTVVGA GRMARLLVQH LLAKGAVDIT VVNRSLERAE ALAKQFEQPI QVLPWESLLN 

       250        260        270        280        290        300 
SVAESNLVFT STGATQPILN YQQLAGVLQP DQPLLLVDIS VPRNIDPDVE KLKGVQVFNV 

       310        320        330        340        350        360 
DHLSRIVEEN RAQRQKLALA AEALVEEEVD QFMEWWRSLE TVPTISSLRH KVESIREQEM 

       370        380        390        400        410        420 
EKALSRLGKD FAEKHLEVID ALTRGIVNKI LHDPMVQLRA KRDIEARRAA MRILQELFNL 

       430 
DPVVFQAQQE R 

« Hide

References

[1]"Population level functional diversity in a microbial community revealed by comparative genomic and metagenomic analyses."
Bhaya D., Grossman A.R., Steunou A.-S., Khuri N., Cohan F.M., Hamamura N., Melendrez M.C., Bateson M.M., Ward D.M., Heidelberg J.F.
ISME J. 1:703-713(2007) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: JA-2-3B'a(2-13).

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
CP000240 Genomic DNA. Translation: ABD03199.1.
RefSeqYP_478462.1. NC_007776.1.

3D structure databases

ProteinModelPortalQ2JJG8.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING321332.CYB_2258.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaABD03199; ABD03199; CYB_2258.
GeneID3900421.
KEGGcyb:CYB_2258.
PATRIC23806866. VBISynSp29577_2262.

Organism-specific databases

CMRSearch...

Phylogenomic databases

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

Enzyme and pathway databases

BioCycSSP321332:GH1B-2258-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_SYNJB
AccessionPrimary (citable) accession number: Q2JJG8
Entry history
Integrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: March 7, 2006
Last modified: February 19, 2014
This is version 70 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