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O23653

- AK2_ARATH

UniProt

O23653 - AK2_ARATH

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Protein
Aspartokinase 2, chloroplastic
Gene
AK2, AK-LYS2, CARAB-AK-LYS, At5g14060, MUA22.6
Organism
Arabidopsis thaliana (Mouse-ear cress)
Status
Reviewed - Annotation score: 5 out of 5 - Experimental evidence at protein leveli

Functioni

Involved in the first step of essential amino acids lysine, threonine, methionine and isoleucine synthesis via the aspartate-family pathway.

Catalytic activityi

ATP + L-aspartate = ADP + 4-phospho-L-aspartate.

Enzyme regulationi

Allosterically inhibited by lysine, but not by S-adenosyl-L-methionine (SAM). K(0.5) for lysine in the presence of physiological concentrations of substrates is 12.5 µM. No inhibition by threonine or leucine and no activation or inhibition by alanine, cysteine, isoleucine, serine, valine, methionine, glutamine, asparagine, glutamic acid or arginine.1 Publication

Kineticsi

K(cat) is 14.5/sec.

  1. KM=980 µM for ATP1 Publication
  2. KM=1940 µM for aspartate

Pathwayi

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Binding sitei87 – 871ATP By similarity
Binding sitei90 – 901ATP; via amide nitrogen By similarity
Binding sitei119 – 1191ATP By similarity
Binding sitei203 – 2031Substrate By similarity

GO - Molecular functioni

  1. ATP binding Source: UniProtKB-KW
  2. amino acid binding Source: InterPro
  3. aspartate kinase activity Source: UniProtKB-EC
Complete GO annotation...

GO - Biological processi

  1. lysine biosynthetic process via diaminopimelate Source: UniProtKB-UniPathway
  2. threonine biosynthetic process Source: UniProtKB-UniPathway
Complete GO annotation...

Keywords - Molecular functioni

Kinase, Transferase

Keywords - Biological processi

Amino-acid biosynthesis, Threonine biosynthesis

Keywords - Ligandi

ATP-binding, Nucleotide-binding

Enzyme and pathway databases

BioCyciARA:AT5G14060-MONOMER.
ARA:GQT-2418-MONOMER.
SABIO-RKO23653.
UniPathwayiUPA00034; UER00015.
UPA00050; UER00461.
UPA00051; UER00462.

Names & Taxonomyi

Protein namesi
Recommended name:
Aspartokinase 2, chloroplastic (EC:2.7.2.4)
Alternative name(s):
Aspartate kinase 2
Gene namesi
Name:AK2
Synonyms:AK-LYS2, CARAB-AK-LYS
Ordered Locus Names:At5g14060
ORF Names:MUA22.6
OrganismiArabidopsis thaliana (Mouse-ear cress)
Taxonomic identifieri3702 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsmalvidsBrassicalesBrassicaceaeCamelineaeArabidopsis
ProteomesiUP000006548: Chromosome 5

Organism-specific databases

TAIRiAT5G14060.

Subcellular locationi

Plastidchloroplast Reviewed prediction

GO - Cellular componenti

  1. chloroplast stroma Source: TAIR
Complete GO annotation...

Keywords - Cellular componenti

Chloroplast, Plastid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transit peptidei1 – 8484Chloroplast Reviewed prediction
Add
BLAST
Chaini85 – 544460Aspartokinase 2, chloroplastic
PRO_0000248158Add
BLAST

Proteomic databases

PaxDbiO23653.
PRIDEiO23653.

Expressioni

Tissue specificityi

Expressed in stems, leaves, floral organs and young seedlings.1 Publication

Gene expression databases

GenevestigatoriO23653.

Structurei

3D structure databases

ProteinModelPortaliO23653.
SMRiO23653. Positions 80-542.

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini401 – 47979ACT 1
Add
BLAST
Domaini481 – 54464ACT 2
Add
BLAST

Sequence similaritiesi

Belongs to the aspartokinase family.
Contains 2 ACT domains.

Keywords - Domaini

Repeat, Transit peptide

Phylogenomic databases

eggNOGiCOG0527.
HOGENOMiHOG000293094.
InParanoidiO23653.
KOiK00928.
OMAiFVLNTWH.
PhylomeDBiO23653.

Family and domain databases

Gene3Di3.40.1160.10. 2 hits.
InterProiIPR002912. ACT_dom.
IPR001048. Asp/Glu/Uridylate_kinase.
IPR001341. Asp_kinase_dom.
IPR018042. Aspartate_kinase_CS.
[Graphical view]
PfamiPF00696. AA_kinase. 1 hit.
PF01842. ACT. 2 hits.
[Graphical view]
SUPFAMiSSF53633. SSF53633. 1 hit.
TIGRFAMsiTIGR00657. asp_kinases. 1 hit.
PROSITEiPS51671. ACT. 2 hits.
PS00324. ASPARTOKINASE. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

O23653-1 [UniParc]FASTAAdd to Basket

« Hide

MASLQLYGVK TPGLALSSKR LEFASKGACF SVTLPSSSAV FRDVEHSCRN    50
IGLRVSCEAL RVDLLQRKEP ETCDSSGTGK ELTCVMKFGG SSVESAERMK 100
EVANLILSFP DERPVIVLSA MGKTTNKLLK AGEKAVTCGV TNVESIEELS 150
FIKELHLRTA HELGVETTVI EKHLEGLHQL LKGISMMKEL TLRTRDYLVS 200
FGECMSTRLF SAYLNKIGHK ARQYDAFEIG FITTDDFTNA DILEATYPAV 250
SKTLVGDWSK ENAVPVVTGY LGKGWRSCAI TTLGRGGSDL TATTIGKALG 300
LREIQVWKDV DGVLTCDPNI YPGAQSVPYL TFDEAAELAY FGAQVLHPLS 350
MRPARDGDIP VRVKNSYNPT APGTVITRSR DMSKAVLTSI VLKRNVTMLD 400
IASTRMLGQY GFLAKVFTTF EDLGISVDVV ATSEVSISLT LDPAKLWGRE 450
LIQRVNELDN LVEELEKIAV VKLLQRRSII SLIGNVQKSS LILEKVFQVF 500
RSNGVNVQMI SQGASKVNIS LIVNDEEAEQ CVRALHSAFF ETDP 544
Length:544
Mass (Da):59,605
Last modified:September 5, 2006 - v2
Checksum:i7DBCFDC1138645AC
GO

Sequence conflict

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Sequence conflicti94 – 941E → G in AAB63104. 1 Publication
Sequence conflicti94 – 941E → G in CAC06395. 1 Publication
Sequence conflicti107 – 1071L → F in AAB63104. 1 Publication
Sequence conflicti107 – 1071L → F in CAC06395. 1 Publication
Sequence conflicti125 – 1251T → I in AAB63104. 1 Publication
Sequence conflicti125 – 1251T → I in CAC06395. 1 Publication
Sequence conflicti144 – 1441E → G in AAB63104. 1 Publication

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
U62020 mRNA. Translation: AAB63104.1.
Y16255 Genomic DNA. Translation: CAC06395.1.
AB007650 Genomic DNA. Translation: BAB08285.1.
CP002688 Genomic DNA. Translation: AED91982.1.
CP002688 Genomic DNA. Translation: AED91983.1.
RefSeqiNP_001078581.1. NM_001085112.1.
NP_196910.1. NM_121409.3.
UniGeneiAt.21761.

Genome annotation databases

EnsemblPlantsiAT5G14060.1; AT5G14060.1; AT5G14060.
AT5G14060.2; AT5G14060.2; AT5G14060.
GeneIDi831255.
KEGGiath:AT5G14060.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
U62020 mRNA. Translation: AAB63104.1 .
Y16255 Genomic DNA. Translation: CAC06395.1 .
AB007650 Genomic DNA. Translation: BAB08285.1 .
CP002688 Genomic DNA. Translation: AED91982.1 .
CP002688 Genomic DNA. Translation: AED91983.1 .
RefSeqi NP_001078581.1. NM_001085112.1.
NP_196910.1. NM_121409.3.
UniGenei At.21761.

3D structure databases

ProteinModelPortali O23653.
SMRi O23653. Positions 80-542.
ModBasei Search...

Proteomic databases

PaxDbi O23653.
PRIDEi O23653.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

EnsemblPlantsi AT5G14060.1 ; AT5G14060.1 ; AT5G14060 .
AT5G14060.2 ; AT5G14060.2 ; AT5G14060 .
GeneIDi 831255.
KEGGi ath:AT5G14060.

Organism-specific databases

TAIRi AT5G14060.

Phylogenomic databases

eggNOGi COG0527.
HOGENOMi HOG000293094.
InParanoidi O23653.
KOi K00928.
OMAi FVLNTWH.
PhylomeDBi O23653.

Enzyme and pathway databases

UniPathwayi UPA00034 ; UER00015 .
UPA00050 ; UER00461 .
UPA00051 ; UER00462 .
BioCyci ARA:AT5G14060-MONOMER.
ARA:GQT-2418-MONOMER.
SABIO-RK O23653.

Gene expression databases

Genevestigatori O23653.

Family and domain databases

Gene3Di 3.40.1160.10. 2 hits.
InterProi IPR002912. ACT_dom.
IPR001048. Asp/Glu/Uridylate_kinase.
IPR001341. Asp_kinase_dom.
IPR018042. Aspartate_kinase_CS.
[Graphical view ]
Pfami PF00696. AA_kinase. 1 hit.
PF01842. ACT. 2 hits.
[Graphical view ]
SUPFAMi SSF53633. SSF53633. 1 hit.
TIGRFAMsi TIGR00657. asp_kinases. 1 hit.
PROSITEi PS51671. ACT. 2 hits.
PS00324. ASPARTOKINASE. 1 hit.
[Graphical view ]
ProtoNeti Search...

Publicationsi

« Hide 'large scale' publications
  1. "Cloning and expression of an Arabidopsis thaliana cDNA encoding a monofunctional aspartate kinase homologous to the lysine-sensitive enzyme of Escherichia coli."
    Tang G., Zhu-Shimoni J.X., Amir R., Zchori I.B.-T., Galili G.
    Plant Mol. Biol. 34:287-293(1997) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [MRNA], TISSUE SPECIFICITY.
  2. Frankard V.M.S., Vauterin M., Jacobs M.
    Submitted (JAN-1998) to the EMBL/GenBank/DDBJ databases
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
    Strain: cv. Columbia.
    Tissue: Leaf.
  3. "Structural analysis of Arabidopsis thaliana chromosome 5. III. Sequence features of the regions of 1,191,918 bp covered by seventeen physically assigned P1 clones."
    Nakamura Y., Sato S., Kaneko T., Kotani H., Asamizu E., Miyajima N., Tabata S.
    DNA Res. 4:401-414(1997) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: cv. Columbia.
  4. The Arabidopsis Information Resource (TAIR)
    Submitted (APR-2011) to the EMBL/GenBank/DDBJ databases
    Cited for: GENOME REANNOTATION.
    Strain: cv. Columbia.
  5. "Allosteric monofunctional aspartate kinases from Arabidopsis."
    Curien G., Laurencin M., Robert-Genthon M., Dumas R.
    FEBS J. 274:164-176(2007) [PubMed] [Europe PMC] [Abstract]
    Cited for: BIOPHYSICOCHEMICAL PROPERTIES, ENZYME REGULATION.

Entry informationi

Entry nameiAK2_ARATH
AccessioniPrimary (citable) accession number: O23653
Secondary accession number(s): Q9FMU4, Q9FY44
Entry historyi
Integrated into UniProtKB/Swiss-Prot: September 5, 2006
Last sequence update: September 5, 2006
Last modified: May 14, 2014
This is version 97 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Arabidopsis thaliana
    Arabidopsis thaliana: entries and gene names
  2. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  3. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

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