UniProtKB - Q9LKA3 (MDHM2_ARATH)
Protein
Malate dehydrogenase 2, mitochondrial
Gene
At3g15020
Organism
Arabidopsis thaliana (Mouse-ear cress)
Status
Functioni
Catalyzes a reversible NAD-dependent dehydrogenase reaction involved in central metabolism and redox homeostasis between organelle compartments (Probable). Required for carbon dioxide and energy partitioning in leaves. May limit photorespiration during the dark phase (PubMed:20876337, PubMed:27208265). Can convert 2-ketoglutarate to L-2-hydroxyglutarate in vitro (PubMed:26203119).1 Publication3 Publications
Catalytic activityi
- EC:1.1.1.371 Publication
Kineticsi
- KM=1.02 mM for oxaloacetate1 Publication
- KM=7 mM for 2-ketoglutarate1 Publication
- Vmax=0.67 mmol/min/mg enzyme toward oxaloacetate (at pH 7.4)1 Publication
- Vmax=0.02 mmol/min/mg enzyme toward malate (at pH 7.4)1 Publication
- Vmax=0.08 mmol/min/mg enzyme toward 2-ketoglutarate (at pH 7.4)1 Publication
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Binding sitei | 62 | NADBy similarity | 1 | |
Binding sitei | 109 | SubstrateBy similarity | 1 | |
Binding sitei | 115 | SubstrateBy similarity | 1 | |
Binding sitei | 122 | NADBy similarity | 1 | |
Binding sitei | 147 | SubstrateBy similarity | 1 | |
Binding sitei | 181 | SubstrateBy similarity | 1 | |
Active sitei | 205 | Proton acceptorBy similarity | 1 | |
Binding sitei | 256 | NADBy similarity | 1 |
Regions
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Nucleotide bindingi | 36 – 42 | NADBy similarity | 7 | |
Nucleotide bindingi | 145 – 147 | NADBy similarity | 3 |
GO - Molecular functioni
- copper ion binding Source: TAIR
- L-malate dehydrogenase activity Source: TAIR
GO - Biological processi
- carbohydrate metabolic process Source: InterPro
- defense response to bacterium Source: TAIR
- malate metabolic process Source: InterPro
- tricarboxylic acid cycle Source: UniProtKB-KW
Keywordsi
Molecular function | Oxidoreductase |
Biological process | Tricarboxylic acid cycle |
Ligand | NAD |
Enzyme and pathway databases
BRENDAi | 1.1.1.37, 399 |
Names & Taxonomyi
Protein namesi | Recommended name: Malate dehydrogenase 2, mitochondrialCurated (EC:1.1.1.371 Publication)Alternative name(s): Mitochondrial MDH21 Publication Short name: mMDH21 Publication Mitochondrial NAD-dependent malate dehydrogenase 2Curated Short name: mNAD-MDH 2Curated Short name: mtNAD-MDH21 Publication |
Gene namesi | Ordered Locus Names:At3g15020 ORF Names:K15M2.16 |
Organismi | Arabidopsis thaliana (Mouse-ear cress) |
Taxonomic identifieri | 3702 [NCBI] |
Taxonomic lineagei | Eukaryota › Viridiplantae › Streptophyta › Embryophyta › Tracheophyta › Spermatophyta › Magnoliopsida › eudicotyledons › Gunneridae › Pentapetalae › rosids › malvids › Brassicales › Brassicaceae › Camelineae › Arabidopsis |
Proteomesi |
|
Organism-specific databases
Araporti | AT3G15020 |
TAIRi | locus:2086340, AT3G15020 |
Subcellular locationi
Mitochondrion
- Mitochondrion matrix 1 Publication1 Publication
Cytosol
- cytosol Source: TAIR
Extracellular region or secreted
- apoplast Source: TAIR
Mitochondrion
- mitochondrial matrix Source: UniProtKB-SubCell
- mitochondrion Source: TAIR
Other locations
- cytoplasm Source: GO_Central
Keywords - Cellular componenti
MitochondrionPathology & Biotechi
Disruption phenotypei
No visible phenotype under normal growth conditions, but the double mutant plants mmdh1 and mmdh2 have decreased germination rate, grow slowly, are small, have increased photorespiration and die before producing seeds.2 Publications
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Transit peptidei | 1 – 22 | Mitochondrion1 PublicationAdd BLAST | 22 | |
ChainiPRO_0000224148 | 23 – 341 | Malate dehydrogenase 2, mitochondrialAdd BLAST | 319 |
Proteomic databases
PaxDbi | Q9LKA3 |
PRIDEi | Q9LKA3 |
ProteomicsDBi | 239048 [Q9LKA3-1] |
PTM databases
iPTMneti | Q9LKA3 |
Expressioni
Tissue specificityi
Expressed in rosette leaves at low levels.1 Publication
Gene expression databases
ExpressionAtlasi | Q9LKA3, baseline and differential |
Genevisiblei | Q9LKA3, AT |
Interactioni
Subunit structurei
Homodimer.
By similarityProtein-protein interaction databases
BioGRIDi | 6065, 3 interactors |
STRINGi | 3702.AT3G15020.1 |
Family & Domainsi
Sequence similaritiesi
Keywords - Domaini
Transit peptidePhylogenomic databases
eggNOGi | KOG1494, Eukaryota |
HOGENOMi | CLU_047181_0_2_1 |
InParanoidi | Q9LKA3 |
OMAi | MGWTSQA |
OrthoDBi | 976445at2759 |
PhylomeDBi | Q9LKA3 |
Family and domain databases
CDDi | cd01337, MDH_glyoxysomal_mitochondrial, 1 hit |
Gene3Di | 3.90.110.10, 1 hit |
InterProi | View protein in InterPro IPR001557, L-lactate/malate_DH IPR022383, Lactate/malate_DH_C IPR001236, Lactate/malate_DH_N IPR015955, Lactate_DH/Glyco_Ohase_4_C IPR001252, Malate_DH_AS IPR010097, Malate_DH_type1 IPR036291, NAD(P)-bd_dom_sf |
Pfami | View protein in Pfam PF02866, Ldh_1_C, 1 hit PF00056, Ldh_1_N, 1 hit |
PIRSFi | PIRSF000102, Lac_mal_DH, 1 hit |
SUPFAMi | SSF51735, SSF51735, 1 hit SSF56327, SSF56327, 1 hit |
TIGRFAMsi | TIGR01772, MDH_euk_gproteo, 1 hit |
PROSITEi | View protein in PROSITE PS00068, MDH, 1 hit |
(1+)i Sequence
Sequence statusi: Complete.
: The displayed sequence is further processed into a mature form. Sequence processingi
This entry describes 1 produced by isoform ialternative splicing. AlignAdd to basketNote: A number of isoforms are produced. According to EST sequences.
This entry has 1 described isoform and 1 potential isoform that is computationally mapped.Show allAlign All
Isoform 1 (identifier: Q9LKA3-1) [UniParc]FASTAAdd to basket
This isoform has been chosen as the sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. canonicali
10 20 30 40 50
MFRSMIVRSA SPVKQGLLRR GFASESVPDR KVVILGAAGG IGQPLSLLMK
60 70 80 90 100
LNPLVSSLSL YDIANTPGVA ADVGHINTRS QVSGYMGDDD LGKALEGADL
110 120 130 140 150
VIIPAGVPRK PGMTRDDLFN INAGIVKNLS IAIAKYCPQA LVNMISNPVN
160 170 180 190 200
STVPIAAEIF KKAGTYDEKK LFGVTTLDVV RARTFYAGKS DVNVAEVNVP
210 220 230 240 250
VVGGHAGITI LPLFSQASPQ ANLSDDLIRA LTKRTQDGGT EVVEAKAGKG
260 270 280 290 300
SATLSMAYAG ALFADACLKG LNGVPNVVEC SFVQSTITEL PFFASKVRLG
310 320 330 340
KNGVEEVLDL GPLSDFEKEG LEALKAELKS SIEKGIKFAN Q
Computationally mapped potential isoform sequencesi
There is 1 potential isoform mapped to this entry.BLASTAlignShow allAdd to basketA8MQK3 | A8MQK3_ARATH | Malate dehydrogenase | mMDH2 At3g15020 | 316 | Annotation score: |
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AP000370 Genomic DNA Translation: BAA97065.1 CP002686 Genomic DNA Translation: AEE75604.1 AY045592 mRNA Translation: AAK73950.1 AY093788 mRNA Translation: AAM10404.1 |
RefSeqi | NP_188120.1, NM_112364.4 [Q9LKA3-1] |
Genome annotation databases
EnsemblPlantsi | AT3G15020.1; AT3G15020.1; AT3G15020 [Q9LKA3-1] |
GeneIDi | 820731 |
Gramenei | AT3G15020.1; AT3G15020.1; AT3G15020 [Q9LKA3-1] |
KEGGi | ath:AT3G15020 |
Keywords - Coding sequence diversityi
Alternative splicingSimilar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AP000370 Genomic DNA Translation: BAA97065.1 CP002686 Genomic DNA Translation: AEE75604.1 AY045592 mRNA Translation: AAK73950.1 AY093788 mRNA Translation: AAM10404.1 |
RefSeqi | NP_188120.1, NM_112364.4 [Q9LKA3-1] |
3D structure databases
SMRi | Q9LKA3 |
ModBasei | Search... |
Protein-protein interaction databases
BioGRIDi | 6065, 3 interactors |
STRINGi | 3702.AT3G15020.1 |
PTM databases
iPTMneti | Q9LKA3 |
Proteomic databases
PaxDbi | Q9LKA3 |
PRIDEi | Q9LKA3 |
ProteomicsDBi | 239048 [Q9LKA3-1] |
Genome annotation databases
EnsemblPlantsi | AT3G15020.1; AT3G15020.1; AT3G15020 [Q9LKA3-1] |
GeneIDi | 820731 |
Gramenei | AT3G15020.1; AT3G15020.1; AT3G15020 [Q9LKA3-1] |
KEGGi | ath:AT3G15020 |
Organism-specific databases
Araporti | AT3G15020 |
TAIRi | locus:2086340, AT3G15020 |
Phylogenomic databases
eggNOGi | KOG1494, Eukaryota |
HOGENOMi | CLU_047181_0_2_1 |
InParanoidi | Q9LKA3 |
OMAi | MGWTSQA |
OrthoDBi | 976445at2759 |
PhylomeDBi | Q9LKA3 |
Enzyme and pathway databases
BRENDAi | 1.1.1.37, 399 |
Miscellaneous databases
PROi | PR:Q9LKA3 |
Gene expression databases
ExpressionAtlasi | Q9LKA3, baseline and differential |
Genevisiblei | Q9LKA3, AT |
Family and domain databases
CDDi | cd01337, MDH_glyoxysomal_mitochondrial, 1 hit |
Gene3Di | 3.90.110.10, 1 hit |
InterProi | View protein in InterPro IPR001557, L-lactate/malate_DH IPR022383, Lactate/malate_DH_C IPR001236, Lactate/malate_DH_N IPR015955, Lactate_DH/Glyco_Ohase_4_C IPR001252, Malate_DH_AS IPR010097, Malate_DH_type1 IPR036291, NAD(P)-bd_dom_sf |
Pfami | View protein in Pfam PF02866, Ldh_1_C, 1 hit PF00056, Ldh_1_N, 1 hit |
PIRSFi | PIRSF000102, Lac_mal_DH, 1 hit |
SUPFAMi | SSF51735, SSF51735, 1 hit SSF56327, SSF56327, 1 hit |
TIGRFAMsi | TIGR01772, MDH_euk_gproteo, 1 hit |
PROSITEi | View protein in PROSITE PS00068, MDH, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | MDHM2_ARATH | |
Accessioni | Q9LKA3Primary (citable) accession number: Q9LKA3 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | February 21, 2006 |
Last sequence update: | October 1, 2000 | |
Last modified: | December 2, 2020 | |
This is version 151 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Plant Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
Reference proteomeDocuments
- Arabidopsis thaliana
Arabidopsis thaliana: entries and gene names - SIMILARITY comments
Index of protein domains and families