Reviewed, UniProtKB/Swiss-Prot Q9EVI7 (LEU3_BUCUN)

Names and origin

Protein names

Recommended name:
    3-isopropylmalate dehydrogenase
    EC=1.1.1.85
Alternative name(s):
    Beta-IPM dehydrogenase
      Short name=IMDH
    3-IPM-DH

Gene names

Name:

leuB

Encoded on

Plasmid pLeu (pBAp1)

Organism

Buchnera aphidicola subsp. Uroleucon sonchi

Taxonomic identifier

118118 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Buchnera

Protein attributes

Sequence length	364 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Catalyzes the oxidation of 3-carboxy-2-hydroxy-4-methylpentanoate (3-isopropylmalate) to 3-carboxy-4-methyl-2-oxopentanoate. The product decarboxylates to 4-methyl-2 oxopentanoate. HAMAP MF_01033
Catalytic activity	(2R,3S)-3-isopropylmalate + NAD+ = 4-methyl-2-oxopentanoate + CO2 + NADH. HAMAP MF_01033
Cofactor	Binds 1 magnesium or manganese ion per subunit By similarity.
Pathway	Amino-acid biosynthesis; L-leucine biosynthesis; L-leucine from 3-methyl-2-oxobutanoate: step 3/4. HAMAP MF_01033
Subunit structure	Homodimer By similarity.
Subcellular location	Cytoplasm By similarity.
Sequence similarities	Belongs to the isocitrate and isopropylmalate dehydrogenases family. LeuB type 1 subfamily.

Ontologies

Keywords
Biological process	Amino-acid biosynthesis Branched-chain amino acid biosynthesis Leucine biosynthesis
Cellular component	Cytoplasm
Ligand	Magnesium Manganese Metal-binding NAD
Molecular function	Oxidoreductase
Technical term	Plasmid
Gene Ontology (GO)
Biological process	leucine biosynthetic process Inferred from electronic annotation. Source: HAMAP oxidation reduction Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	cytoplasm Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	3-isopropylmalate dehydrogenase activity Inferred from electronic annotation. Source: HAMAP NAD or NADH binding Inferred from electronic annotation. Source: InterPro magnesium ion binding Inferred from electronic annotation. Source: UniProtKB-KW manganese ion binding Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 364	364	3-isopropylmalate dehydrogenase HAMAP MF_01033		PRO_0000083671
Regions
	Nucleotide binding	78 – 91	14	NAD By similarity
	Nucleotide binding	286 – 298	13	NAD By similarity
Sites
	Metal binding	228	1	Magnesium or manganese By similarity
	Metal binding	252	1	Magnesium or manganese By similarity
	Metal binding	256	1	Magnesium or manganese By similarity
	Binding site	99	1	Substrate By similarity
	Binding site	109	1	Substrate By similarity
	Binding site	139	1	Substrate By similarity
	Binding site	228	1	Substrate By similarity
	Site	146	1	Important for catalysis By similarity
	Site	196	1	Important for catalysis By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q9EVI7-1 [UniParc]. Last modified March 1, 2001. Version 1. Checksum: 3E405D42791B47AB	FASTA	364	40,573
	10 20 30 40 50 60 MKKKYRIAVL PGDGIGPEVM REAYKILNIL KYHFSLPLEI EEFDVGGSAI DKEGVALPKK 70 80 90 100 110 120 TLLGCENADA ILFGSVGGRK WDSLPIDQRP ERASLLPLRK HFNLFANLRP AQLYSELKYL 130 140 150 160 170 180 SPLAFLIVIK NGFNILCVRE LTGGIYFGQP SGRSKTNNFE YAFDTEVYYD YEINRIAHLA 190 200 210 220 230 240 FQLAQTRNYK VCSIDKSNVL NSSILWREIV KKVSLSYPNV HLSHLYIDNA TMQIIKDPNQ 250 260 270 280 290 300 FDVLLCSNLF GDIISDECAI ITGSIGMLPS ASLNEKKFGL YEPAGGSAPD IEGKNIANPI 310 320 330 340 350 360 AQILSVSMLV RYSMNLKNIA DKIDYSVISI LKKGYKTADI AHDNNYLKTN EMGDVIADAL ISGE

References

[1]	"Vertical transmission of biosynthetic plasmids in aphid endosymbionts (Buchnera)." Wernegreen J.J., Moran N.A. J. Bacteriol. 183:785-790(2001) [PubMed: 11133977] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	AF197448 Genomic DNA. Translation: AAG31378.1.
3D structure databases
HSSP	HSSP built from PDB template 1CNZ based on UniProtKB P37412.
ModBase	Search...
Family and domain databases
HAMAP	MF_01033. [Tree]
InterPro	IPR019818. IsoCit/isopropylmalate_DH_CS. IPR001804. Isocitrate/isopropylmalate_DH. IPR004429. Isopropylmalate_DH. [Graphical view]
Gene3D	G3DSA:3.40.718.10. IDH_IMDH. 1 hit.
PANTHER	PTHR11835. IDH_IMDH_dimeric. 1 hit. PTHR11835:SF13. IPMDH. 1 hit.
Pfam	PF00180. Iso_dh. 1 hit. [Graphical view]
TIGRFAMs	TIGR00169. leuB. 1 hit.
PROSITE	PS00470. IDH_IMDH. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

LEU3_BUCUN

Accession

Primary (citable) accession number: Q9EVI7

Entry history

Integrated into UniProtKB/Swiss-Prot:	October 19, 2002
Last sequence update:	March 1, 2001
Last modified:	June 16, 2009
This is version 42 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)