B5ZA06 · HEM1_HELPG

Function

function

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

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.

Catalytic activity

Pathway

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

Features

Showing features for binding site, active site, site.

TypeIDPosition(s)Description
Binding site58-61substrate
Active site59Nucleophile
Site111Important for activity
Binding site121substrate
Binding site126-128substrate
Binding site132substrate
Binding site203-208NADP+ (UniProtKB | ChEBI)

GO annotations

AspectTerm
Molecular Functionglutamyl-tRNA reductase activity
Molecular FunctionNADP binding
Biological Processprotoporphyrinogen IX biosynthetic process

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Glutamyl-tRNA reductase
  • EC number
  • Short names
    GluTR

Gene names

    • Name
      hemA
    • Ordered locus names
      HPG27_219

Organism names

Accessions

  • Primary accession
    B5ZA06

Proteomes

PTM/Processing

Features

Showing features for chain.

TypeIDPosition(s)Description
ChainPRO_10000931441-449Glutamyl-tRNA reductase

Interaction

Subunit

Homodimer.

Structure

Family & Domains

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.

Sequence similarities

Belongs to the glutamyl-tRNA reductase family.

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    449
  • Mass (Da)
    51,805
  • Last updated
    2008-11-25 v1
  • Checksum
    BD38F20F6E95404E
MELETHLSKYFTLAFTHKSMSLEMREKLAINSSATLKEFLQTIKTHCPNIKECMVLSTCNRFEIYASLKHNTHANEQKNALLKILAQNKKMSMSDLEKCVLMNTDESAVHHVFSVCSSLDSLVVGETQITGQMKNAYRFAFEEKFCSKDLTRLLHFAFKCAAKVRNLTGISKQGVSISSVAVKEALNIFEKERIKDKKALVIGLGEMAQLVIKHLLNKQFEVLILGRNAAKFEDFIKELEEPKKVSFQNIENLNAYINAYALLFCATSSPHFIVQNRMLKETSFRRFWFDLAVPRNIEKPVFNNIFLYSVDDLEPMVRENVGNRQESRTRAYEIVGLATMEFYQWIQSLEVEPLIKDLRELARISAQKELQKALKKRYVPKEYEGNIEKILHNAFNTFLHHPTIALKKNAQKEESDVLVGAIKNLFNLDKSTTCHAQNLNLYKCEYYEE

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
CP001173
EMBL· GenBank· DDBJ
ACI26986.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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