ID HEM1_PYRIL Reviewed; 393 AA. AC A1RQP7; DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot. DT 06-FEB-2007, sequence version 1. DT 27-MAR-2024, entry version 95. DE RecName: Full=Glutamyl-tRNA reductase {ECO:0000255|HAMAP-Rule:MF_00087}; DE Short=GluTR {ECO:0000255|HAMAP-Rule:MF_00087}; DE EC=1.2.1.70 {ECO:0000255|HAMAP-Rule:MF_00087}; GN Name=hemA {ECO:0000255|HAMAP-Rule:MF_00087}; GN OrderedLocusNames=Pisl_0096; OS Pyrobaculum islandicum (strain DSM 4184 / JCM 9189 / GEO3). OC Archaea; Thermoproteota; Thermoprotei; Thermoproteales; Thermoproteaceae; OC Pyrobaculum. OX NCBI_TaxID=384616; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=DSM 4184 / JCM 9189 / GEO3; RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., RA Glavina del Rio T., Dalin E., Tice H., Pitluck S., Meincke L., Brettin T., RA Bruce D., Han C., Tapia R., Gilna P., Schmutz J., Larimer F., Land M., RA Hauser L., Kyrpides N., Mikhailova N., Lowe T., Richardson P.; RT "Complete sequence of Pyrobaculum islandicum DSM 4184."; RL Submitted (DEC-2006) to the EMBL/GenBank/DDBJ databases. CC -!- FUNCTION: Catalyzes the NADPH-dependent reduction of glutamyl-tRNA(Glu) CC to glutamate 1-semialdehyde (GSA). {ECO:0000255|HAMAP-Rule:MF_00087}. CC -!- CATALYTIC ACTIVITY: CC Reaction=(S)-4-amino-5-oxopentanoate + NADP(+) + tRNA(Glu) = H(+) + L- CC glutamyl-tRNA(Glu) + NADPH; Xref=Rhea:RHEA:12344, Rhea:RHEA- CC COMP:9663, Rhea:RHEA-COMP:9680, ChEBI:CHEBI:15378, ChEBI:CHEBI:57501, CC ChEBI:CHEBI:57783, ChEBI:CHEBI:58349, ChEBI:CHEBI:78442, CC ChEBI:CHEBI:78520; EC=1.2.1.70; Evidence={ECO:0000255|HAMAP- CC Rule:MF_00087}; CC -!- PATHWAY: Porphyrin-containing compound metabolism; protoporphyrin-IX CC biosynthesis; 5-aminolevulinate from L-glutamyl-tRNA(Glu): step 1/2. CC {ECO:0000255|HAMAP-Rule:MF_00087}. CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00087}. CC -!- DOMAIN: Possesses an unusual extended V-shaped dimeric structure with CC each monomer consisting of three distinct domains arranged along a CC curved 'spinal' alpha-helix. The N-terminal catalytic domain CC specifically recognizes the glutamate moiety of the substrate. The CC second domain is the NADPH-binding domain, and the third C-terminal CC domain is responsible for dimerization. {ECO:0000255|HAMAP- CC Rule:MF_00087}. CC -!- MISCELLANEOUS: During catalysis, the active site Cys acts as a CC nucleophile attacking the alpha-carbonyl group of tRNA-bound glutamate CC with the formation of a thioester intermediate between enzyme and CC glutamate, and the concomitant release of tRNA(Glu). The thioester CC intermediate is finally reduced by direct hydride transfer from NADPH, CC to form the product GSA. {ECO:0000255|HAMAP-Rule:MF_00087}. CC -!- SIMILARITY: Belongs to the glutamyl-tRNA reductase family. CC {ECO:0000255|HAMAP-Rule:MF_00087}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; CP000504; ABL87279.1; -; Genomic_DNA. DR RefSeq; WP_011761856.1; NC_008701.1. DR AlphaFoldDB; A1RQP7; -. DR SMR; A1RQP7; -. DR STRING; 384616.Pisl_0096; -. DR GeneID; 4616972; -. DR KEGG; pis:Pisl_0096; -. DR eggNOG; arCOG01036; Archaea. DR HOGENOM; CLU_035113_0_0_2; -. DR OrthoDB; 4562at2157; -. DR UniPathway; UPA00251; UER00316. DR Proteomes; UP000002595; Chromosome. DR GO; GO:0008883; F:glutamyl-tRNA reductase activity; IEA:UniProtKB-UniRule. DR GO; GO:0050661; F:NADP binding; IEA:InterPro. DR GO; GO:0006782; P:protoporphyrinogen IX biosynthetic process; IEA:UniProtKB-UniPathway. DR Gene3D; 3.30.460.30; Glutamyl-tRNA reductase, N-terminal domain; 1. DR Gene3D; 3.40.50.720; NAD(P)-binding Rossmann-like Domain; 1. DR HAMAP; MF_00087; Glu_tRNA_reductase; 1. DR InterPro; IPR000343; 4pyrrol_synth_GluRdtase. DR InterPro; IPR015895; 4pyrrol_synth_GluRdtase_N. DR InterPro; IPR018214; GluRdtase_CS. DR InterPro; IPR036453; GluRdtase_dimer_dom_sf. DR InterPro; IPR036343; GluRdtase_N_sf. DR InterPro; IPR036291; NAD(P)-bd_dom_sf. DR InterPro; IPR006151; Shikm_DH/Glu-tRNA_Rdtase. DR PANTHER; PTHR43013; GLUTAMYL-TRNA REDUCTASE; 1. DR PANTHER; PTHR43013:SF1; GLUTAMYL-TRNA REDUCTASE; 1. DR Pfam; PF05201; GlutR_N; 1. DR Pfam; PF01488; Shikimate_DH; 1. DR PIRSF; PIRSF000445; 4pyrrol_synth_GluRdtase; 1. DR SUPFAM; SSF69742; Glutamyl tRNA-reductase catalytic, N-terminal domain; 1. DR SUPFAM; SSF69075; Glutamyl tRNA-reductase dimerization domain; 1. DR SUPFAM; SSF51735; NAD(P)-binding Rossmann-fold domains; 1. DR PROSITE; PS00747; GLUTR; 1. PE 3: Inferred from homology; KW NADP; Oxidoreductase; Porphyrin biosynthesis. FT CHAIN 1..393 FT /note="Glutamyl-tRNA reductase" FT /id="PRO_1000004679" FT ACT_SITE 48 FT /note="Nucleophile" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00087" FT BINDING 47..50 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00087" FT BINDING 98 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00087" FT BINDING 103..105 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00087" FT BINDING 109 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00087" FT BINDING 177..182 FT /ligand="NADP(+)" FT /ligand_id="ChEBI:CHEBI:58349" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00087" FT SITE 88 FT /note="Important for activity" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00087" SQ SEQUENCE 393 AA; 43011 MW; D5B0DC67046AF16A CRC64; MDLLSPLSAI VLTYREVDTD TLGKIGEEMR KCLEQMGRGT PIYVLHTCGR VEAYLYGASP EEVQTVAETY RKYVNSVRII AGVEAARHLF RVAAGLDSML IGETDVLGQL EEAFDRQVRA GYTRGLLKTI VERAVRVGKR VRTETAISRG PRGLGSLSII YVSRLLDMRQ AKVAVLGAGA VGAGLAMELA ARGVKKLYIL NRTLEKAKEV AAKTGGEARP LTKEEVERCL RECDVVFSSV HSMEYIIDKI PEGASVKVVV DLGVPQTVAS GLPVKVVRIE DLREIAEQYN AERASEIAKA EAIVEEELAI LPKLLARRYI EETVSTFIET AMLAAEEEGA RAGCNTATLA ARTTVKRILL PLVERLKKMA EDGQIEEAVK LAQMLSQTIG RKI //