ID   HEM1_NOSP7              Reviewed;         428 AA.
AC   B2J5E4;
DT   24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-JUN-2008, sequence version 1.
DT   27-MAR-2024, entry version 84.
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=Npun_F3918;
OS   Nostoc punctiforme (strain ATCC 29133 / PCC 73102).
OC   Bacteria; Cyanobacteriota; Cyanophyceae; Nostocales; Nostocaceae; Nostoc.
OX   NCBI_TaxID=63737;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29133 / PCC 73102;
RX   PubMed=23463784; DOI=10.1104/pp.112.213116;
RA   Ekman M., Picossi S., Campbell E.L., Meeks J.C., Flores E.;
RT   "A Nostoc punctiforme Sugar Transporter Necessary to Establish a
RT   Cyanobacterium-Plant Symbiosis.";
RL   Plant Physiol. 161:1984-1992(2013).
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   -!- PATHWAY: Porphyrin-containing compound metabolism; chlorophyll
CC       biosynthesis. {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}.
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DR   EMBL; CP001037; ACC82301.1; -; Genomic_DNA.
DR   RefSeq; WP_012410270.1; NC_010628.1.
DR   AlphaFoldDB; B2J5E4; -.
DR   SMR; B2J5E4; -.
DR   STRING; 63737.Npun_F3918; -.
DR   EnsemblBacteria; ACC82301; ACC82301; Npun_F3918.
DR   KEGG; npu:Npun_F3918; -.
DR   eggNOG; COG0373; Bacteria.
DR   HOGENOM; CLU_035113_2_1_3; -.
DR   OrthoDB; 110209at2; -.
DR   PhylomeDB; B2J5E4; -.
DR   UniPathway; UPA00251; UER00316.
DR   UniPathway; UPA00668; -.
DR   Proteomes; UP000001191; 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:0015995; P:chlorophyll biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0006782; P:protoporphyrinogen IX biosynthetic process; IEA:UniProtKB-UniPathway.
DR   CDD; cd05213; NAD_bind_Glutamyl_tRNA_reduct; 1.
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; IPR015896; 4pyrrol_synth_GluRdtase_dimer.
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   NCBIfam; TIGR01035; hemA; 1.
DR   PANTHER; PTHR43120; GLUTAMYL-TRNA REDUCTASE 1, CHLOROPLASTIC; 1.
DR   PANTHER; PTHR43120:SF1; GLUTAMYL-TRNA REDUCTASE 1, CHLOROPLASTIC; 1.
DR   Pfam; PF00745; GlutR_dimer; 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   Chlorophyll biosynthesis; NADP; Oxidoreductase; Porphyrin biosynthesis;
KW   Reference proteome.
FT   CHAIN           1..428
FT                   /note="Glutamyl-tRNA reductase"
FT                   /id="PRO_1000093155"
FT   ACT_SITE        50
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00087"
FT   BINDING         49..52
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         114..116
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00087"
FT   BINDING         120
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00087"
FT   BINDING         189..194
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00087"
FT   SITE            99
FT                   /note="Important for activity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00087"
SQ   SEQUENCE   428 AA;  47926 MW;  E637C83AC6B57273 CRC64;
     MNIAVVGLSH KTAPVEVREK LSIPEPQIES AIAQLASYPH IDEVAILSTC NRLEIYIVTS
     EADQGIREIT QFLAEYSKLP VLSLRQHLFM LLHDDAVMHV MRVAGGLDSL VLGEGQILAQ
     VKTTHKLGQQ YNGIKTILNR LFKQALTAGK RVRTETSIGT GAVSISSAAV ELAQIKVANL
     AACRVVILGA GKMSRLLVQH LISKGAVEIS IVNRSRDRAQ ELAKLFPQQP IKIHPLSEMM
     SVIADSDLVF TSTSATEPIL DRVKLEMVLE VQRSLMLFDI SVPRNVHADV NELENVQAFN
     VDDLKAVVAQ NYESRRKIAQ EAEKLLEEEV EAFDIWWRSL ETVTTISCLR NKVETIREQE
     LEKALSRLGS EFAEKHQEVI EALTRGIVNK ILHDPMVQLR SQQDVEARRR CMQTLQMLFN
     LDAEEQFS
//