Reviewed, UniProtKB/Swiss-Prot Q0AC03 (HEM1_ALHEH)

Names and origin

Protein names

Recommended name:
    Glutamyl-tRNA reductase
      Short name=GluTR
    EC=1.2.1.70

Gene names

Name:	hemA
Ordered Locus Names:	Mlg_0279

Organism

Alkalilimnicola ehrlichei (strain MLHE-1) [Complete proteome] [HAMAP]

Taxonomic identifier

187272 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Chromatiales › Ectothiorhodospiraceae › Alkalilimnicola

Protein attributes

Sequence length	446 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Catalyzes the NADPH-dependent reduction of glutamyl-tRNA(Glu) to glutamate 1-semialdehyde (GSA) By similarity.
Catalytic activity	L-glutamate 1-semialdehyde + NADP(+) + tRNA(Glu) = L-glutamyl-tRNA(Glu) + NADPH.
Pathway	Porphyrin metabolism; protoporphyrin-IX biosynthesis; 5-aminolevulinate from L-glutamyl-tRNA(Glu): step 1/2.
Subunit structure	Homodimer By similarity.
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.
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 process	Porphyrin biosynthesis
Ligand	NADP
Molecular function	Oxidoreductase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	oxidation reduction Inferred from electronic annotation. Source: UniProtKB-KW porphyrin biosynthetic process Inferred from electronic annotation. Source: HAMAP
Cellular component	cytoplasm Inferred from electronic annotation. Source: InterPro
Molecular function	NADP binding Inferred from electronic annotation. Source: InterPro glutamyl-tRNA reductase activity Inferred from electronic annotation. Source: HAMAP shikimate 5-dehydrogenase activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 446	446	Glutamyl-tRNA reductase		PRO_1000004591
Regions
	Nucleotide binding	187 – 192	6	NADP By similarity
	Region	49 – 52	4	Substrate binding By similarity
	Region	112 – 114	3	Substrate binding By similarity
Sites
	Active site	50	1	Nucleophile By similarity
	Binding site	107	1	Substrate By similarity
	Binding site	118	1	Substrate By similarity
	Site	97	1	Important for activity By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q0AC03-1 [UniParc]. Last modified October 17, 2006. Version 1. Checksum: B3DF51282454B406	FASTA	446	49,827
	10 20 30 40 50 60 MSLFALGLNH KSAPVNIREQ IVFAPDAVTA ALQHLRAHTT AREAAILSTC NRTELYVRMD 70 80 90 100 110 120 DRAPEMLGEW LARYHRLDPE WLRDYLYLHE GAGAVRHLMR VSAGLDSLVL GEPQILGQAK 130 140 150 160 170 180 IAYQGAIDAG TMGRVLDRLF QHAFSVAKQV RTDTGIGANP VSVAFAAVTL ARQIFDDFQN 190 200 210 220 230 240 RTALLIGAGE TIELVARHLR EQGLKNLIVA NRNLERARQL VELEGGEAIP LSEIPTRLPE 250 260 270 280 290 300 ADVLVASTAS PLPILGKGTV ERAVRKRRHR PMFMLDLAVP RDIEPEAGNL DDVYLYTVDD 310 320 330 340 350 360 LREVIAENRR SREEAAHQAE EIVQRQVDQF LSWRRAQQAV ASICDFRERG HAHARELLQR 370 380 390 400 410 420 ANRRLRCGEP PERVLAWLSH TLTNRLLHAP TVGLREAAEA GDRERIELAR TLLQIENANE 430 440 DTRESVDKEQ TGTTQGAARG DQRSTG

References

[1]

"Complete sequence of Alkalilimnicola ehrilichei MLHE-1." Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S., Sims D., Brettin T., Bruce D., Han C., Tapia R., Gilna P., Schmutz J. , Larimer F., Land M., Hauser L., Kyrpides N., Mikhailova N., Oremland R.S., Hoeft S.E., Switzer-Blum J., Kulp T., King G., Tabita R., Witte B., Santini J.M., Basu P., Hollibaugh J.T., Xie G., Stolz J.F., Richardson P. Submitted (AUG-2006) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000453 Genomic DNA. Translation: ABI55634.1.
RefSeq	YP_741124.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	4270497.
GenomeReviews	Gene locus Mlg_0279 in contig CP000453_GR.
KEGG	aeh:Mlg_0279.
NMPDR	fig|187272.6.peg.263.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q0AC03.
Family and domain databases
HAMAP	MF_00087. [Tree]
InterPro	IPR000343. 4pyrrol_synth_GluRdtase. IPR015896. 4pyrrol_synth_GluRdtase_C. IPR015895. 4pyrrol_synth_GluRdtase_N. IPR016040. NAD(P)-bd. IPR006151. Shikm_DHase/Glu-tRNA_Rdtase. [Graphical view]
Gene3D	G3DSA:3.40.50.720. NAD(P)-bd. 1 hit.
Pfam	PF00745. GlutR_dimer. 1 hit. PF05201. GlutR_N. 1 hit. PF01488. Shikimate_DH. 1 hit. [Graphical view]
PIRSF	PIRSF000445. 4pyrrol_synth_GluRdtase. 1 hit.
TIGRFAMs	TIGR01035. hemA. 1 hit.
PROSITE	PS00747. GLUTR. False negative. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

HEM1_ALHEH

Accession

Primary (citable) accession number: Q0AC03

Entry history

Integrated into UniProtKB/Swiss-Prot:	January 15, 2008
Last sequence update:	October 17, 2006
Last modified:	November 25, 2008
This is version 24 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)