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Q8GCB0 (HEM1_BACME) Reviewed, UniProtKB/Swiss-Prot

Last modified February 19, 2014. Version 72. 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
OrganismBacillus megaterium
Taxonomic identifier1404 [NCBI]
Taxonomic lineageBacteriaFirmicutesBacilliBacillalesBacillaceaeBacillus

Protein attributes

Sequence length446 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

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 processPorphyrin biosynthesis
   LigandNADP
   Molecular functionOxidoreductase
Gene Ontology (GO)
   Biological_processprotoporphyrinogen 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 – 446446Glutamyl-tRNA reductase HAMAP-Rule MF_00087
PRO_0000113994

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
Q8GCB0 [UniParc].

Last modified March 1, 2003. Version 1.
Checksum: 8A86F67822352A02

FASTA44649,838
        10         20         30         40         50         60 
MHIIAVGLNF RTAPVEIREK LSFNEQELAS AMKTLSGQKS ILENIIVSTC NRTEIYAVVD 

        70         80         90        100        110        120 
QLHTGRYYVK AFLAEWFGID KEEFSPYLTI YENDGAIEHL YRVACGLDSM VIGETQILGQ 

       130        140        150        160        170        180 
VRSSFLLAQE EETIGTVFNQ LFKQAVTLAK KAHHETEIGA NAVSVSYAAV ELAKKIFGDL 

       190        200        210        220        230        240 
SSKHVLILGA GKMGQLAVQN LYGSGAKKVT VVNRTFEKAQ ELANRFSGEA KPFADLQHAL 

       250        260        270        280        290        300 
SEADILISST GANDYVVTKQ MMSEAERTRK GRPLFMVDIA VPRDLDPELD ELETVFLYDI 

       310        320        330        340        350        360 
DDLNGIVESN LQERQKAADE IEIMLEAEIV AFKSWLGTLG VVPVISALRQ KALTIQAETM 

       370        380        390        400        410        420 
KSIDRKLPDL SERERKVLNK HTKSIINQLL RDPIPHAKEL AGEKHAEESL ELFMKIFNIE 

       430        440 
QEVALQKEKE EQLHTSITSH SVAYQS 

« Hide

References

[1]"Identification and functional analysis of enzymes required for precorrin-2 dehydrogenation and metal ion insertion in the biosynthesis of sirohaem and cobalamin in Bacillus megaterium."
Raux E., Leech H.K., Beck R., Schubert H.L., Santander P.J., Roessner C.A., Scott A.I., Martens J.H., Jahn D., Thermes C., Rambach A., Warren M.J.
Biochem. J. 370:505-516(2003) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
Strain: DSM 509 / NBRC 12109.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
AJ508220 Genomic DNA. Translation: CAD48144.1.

3D structure databases

ProteinModelPortalQ8GCB0.
ModBaseSearch...
MobiDBSearch...

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Enzyme and pathway databases

UniPathwayUPA00251; UER00316.

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_BACME
AccessionPrimary (citable) accession number: Q8GCB0
Entry history
Integrated into UniProtKB/Swiss-Prot: November 14, 2003
Last sequence update: March 1, 2003
Last modified: February 19, 2014
This is version 72 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