UniProtKB - Q8NQ98 (ACNA_CORGL)
Protein
Aconitate hydratase A
Gene
acn
Organism
Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / BCRC 11384 / JCM 1318 / LMG 3730 / NCIMB 10025)
Status
Functioni
Involved in the catabolism of short chain fatty acids (SCFA) via the tricarboxylic acid (TCA)(acetyl degradation route) and probably via the 2-methylcitrate cycle I (propionate degradation route). Catalyzes the reversible isomerization of citrate to isocitrate via cis-aconitate (PubMed:21984793, PubMed:20647021). Could catalyze the hydration of 2-methyl-cis-aconitate to yield (2R,3S)-2-methylisocitrate. The apo form of AcnA functions as a RNA-binding regulatory protein (By similarity).By similarity2 Publications
Catalytic activityi
Cofactori
[4Fe-4S] cluster1 PublicationNote: Binds 1 [4Fe-4S] cluster per subunit.1 Publication
Kineticsi
kcat is 19.6 sec(-1) for aconitase activity with citrate as substrate (at pH 8). kcat is 28.9 sec(-1) for aconitase activity with isocitrate as substrate (at pH 8). kcat is 71 sec(-1) for aconitase activity with cis-aconitate as substrate (at pH 8).1 Publication
- KM=18.5 µM for cis-aconitate (at pH 8)1 Publication
- KM=480 µM for citrate (at pH 8)1 Publication
- KM=552 µM for isocitrate (at pH 8)1 Publication
- Vmax=11.2 µmol/min/mg enzyme with citrate as substrate (at pH 8)1 Publication
- Vmax=16.5 µmol/min/mg enzyme with isocitrate as substrate (at pH 8)1 Publication
- Vmax=40.6 µmol/min/mg enzyme with cis-aconitate as substrate (at pH 8)1 Publication
pH dependencei
Optimum pH is between 7.5 and 7.75.1 Publication
Temperature dependencei
Optimum temperature is 50 degrees Celsius.1 Publication
: tricarboxylic acid cycle Pathwayi
This protein is involved in step 2 of the subpathway that synthesizes isocitrate from oxaloacetate.1 PublicationProteins known to be involved in the 2 steps of the subpathway in this organism are:
- 2-methylcitrate dehydratase 2 (prpD2), 2-methylcitrate synthase 2 (prpC2), Citrate synthase (gltA)
- Aconitate hydratase A (acn)
View all proteins of this organism that are known to be involved in the subpathway that synthesizes isocitrate from oxaloacetate, the pathway tricarboxylic acid cycle and in Carbohydrate metabolism.
Pathwayi: propanoate degradation
This protein is involved in the pathway propanoate degradation, which is part of Organic acid metabolism.1 PublicationView all proteins of this organism that are known to be involved in the pathway propanoate degradation and in Organic acid metabolism.
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Metal bindingi | 475 | Iron-sulfur (4Fe-4S)By similarity | 1 | |
Metal bindingi | 541 | Iron-sulfur (4Fe-4S)By similarity | 1 | |
Metal bindingi | 544 | Iron-sulfur (4Fe-4S)By similarity | 1 |
GO - Molecular functioni
- 2-methylisocitrate dehydratase activity Source: UniProtKB
- 4 iron, 4 sulfur cluster binding Source: UniProtKB
- aconitate hydratase activity Source: UniProtKB
- citrate dehydratase activity Source: UniProtKB-EC
- metal ion binding Source: UniProtKB-KW
- mRNA 3'-UTR binding Source: UniProtKB
- mRNA binding Source: UniProtKB
GO - Biological processi
- propionate metabolic process, methylcitrate cycle Source: UniProtKB
- tricarboxylic acid cycle Source: UniProtKB
Keywordsi
Molecular function | Lyase, RNA-binding |
Biological process | Tricarboxylic acid cycle |
Ligand | Iron, Iron-sulfur, Metal-binding |
Enzyme and pathway databases
BioCyci | CORYNE:G18NG-11125-MONOMER |
UniPathwayi | UPA00223;UER00718 UPA00946 |
Names & Taxonomyi
Protein namesi | Recommended name: Aconitate hydratase A1 Publication (EC:4.2.1.31 Publication)Short name: ACN1 Publication Short name: Aconitase1 Publication Alternative name(s): (2R,3S)-2-methylisocitrate dehydrataseBy similarity (2S,3R)-3-hydroxybutane-1,2,3-tricarboxylate dehydrataseBy similarity Iron-responsive protein-likeBy similarity Short name: IRP-likeBy similarity Probable 2-methyl-cis-aconitate hydrataseBy similarity (EC:4.2.1.99By similarity) RNA-binding proteinBy similarity |
Gene namesi | Name:acn Ordered Locus Names:Cgl1540, cg1737 |
Organismi | Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / BCRC 11384 / JCM 1318 / LMG 3730 / NCIMB 10025) |
Taxonomic identifieri | 196627 [NCBI] |
Taxonomic lineagei | Bacteria › Actinobacteria › Corynebacteriales › Corynebacteriaceae › Corynebacterium › |
Proteomesi |
|
Pathology & Biotechi
Disruption phenotypei
Cells lacking this gene are glutamate auxotrophic in glucose minimal medium, show a strong growth defect, and secret large amounts of acetate. Deletion causes a strong selection pressure for secondary mutations within the gltA gene, which might be caused by a growth-inhibitory level of cytoplasmic citrate.1 Publication
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000076657 | 1 – 939 | Aconitate hydratase AAdd BLAST | 939 |
2D gel databases
World-2DPAGEi | 0001:Q8NQ98 |
Expressioni
Inductioni
Repressed by AcnR, RipA, GlxR and activated by RamA. Repression by RipA is part of iron homeostasis and serves to reduce the iron demand under iron limitation. The activation of acn transcription by RamA serves to allow the increased carbon flux through the TCA cycle during growth on acetate. GlxR is a global regulator that binds to the acn promoter and presumably represses its transcription in the presence of cyclic AMP (cAMP).4 Publications
Interactioni
Subunit structurei
Monomer.
1 PublicationProtein-protein interaction databases
STRINGi | 196627.cg1737 |
Family & Domainsi
Sequence similaritiesi
Belongs to the aconitase/IPM isomerase family.Curated
Phylogenomic databases
eggNOGi | COG1048, Bacteria |
HOGENOMi | CLU_013476_2_1_11 |
OMAi | NGGIMQY |
Family and domain databases
CDDi | cd01580, AcnA_IRP_Swivel, 1 hit |
Gene3Di | 3.20.19.10, 1 hit |
InterProi | View protein in InterPro IPR044137, AcnA_IRP_Swivel IPR001030, Acoase/IPM_deHydtase_lsu_aba IPR015928, Aconitase/3IPM_dehydase_swvl IPR006249, Aconitase/IRP2 IPR018136, Aconitase_4Fe-4S_BS IPR036008, Aconitase_4Fe-4S_dom IPR000573, AconitaseA/IPMdHydase_ssu_swvl |
PANTHERi | PTHR11670, PTHR11670, 1 hit |
Pfami | View protein in Pfam PF00330, Aconitase, 1 hit PF00694, Aconitase_C, 1 hit |
PRINTSi | PR00415, ACONITASE |
SUPFAMi | SSF53732, SSF53732, 1 hit |
PROSITEi | View protein in PROSITE PS00450, ACONITASE_1, 1 hit PS01244, ACONITASE_2, 1 hit |
i Sequence
Sequence statusi: Complete.
Q8NQ98-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MTESKNSFNA KSTLEVGDKS YDYFALSAVP GMEKLPYSLK VLGENLLRTE
60 70 80 90 100
DGANITNEHI EAIANWDASS DPSIEIQFTP ARVLMQDFTG VPCVVDLATM
110 120 130 140 150
REAVAALGGD PNDVNPLNPA EMVIDHSVIV EAFGRPDALA KNVEIEYERN
160 170 180 190 200
EERYQFLRWG SESFSNFRVV PPGTGIVHQV NIEYLARVVF DNEGLAYPDT
210 220 230 240 250
CIGTDSHTTM ENGLGILGWG VGGIEAEAAM LGQPVSMLIP RVVGFKLTGE
260 270 280 290 300
IPVGVTATDV VLTITEMLRD HGVVQKFVEF YGSGVKAVPL ANRATIGNMS
310 320 330 340 350
PEFGSTCAMF PIDEETTKYL RLTGRPEEQV ALVEAYAKAQ GMWLDEDTVE
360 370 380 390 400
AEYSEYLELD LSTVVPSIAG PKRPQDRILL SEAKEQFRKD LPTYTDDAVS
410 420 430 440 450
VDTSIPATRM VNEGGGQPEG GVEADNYNAS WAGSGESLAT GAEGRPSKPV
460 470 480 490 500
TVASPQGGEY TIDHGMVAIA SITSCTNTSN PSVMIGAGLI ARKAAEKGLK
510 520 530 540 550
SKPWVKTICA PGSQVVDGYY QRADLWKDLE AMGFYLSGFG CTTCIGNSGP
560 570 580 590 600
LPEEISAAIN EHDLTATAVL SGNRNFEGRI SPDVKMNYLA SPIMVIAYAI
610 620 630 640 650
AGTMDFDFEN EALGQDQDGN DVFLKDIWPS TEEIEDTIQQ AISRELYEAD
660 670 680 690 700
YADVFKGDKQ WQELDVPTGD TFEWDENSTY IRKAPYFDGM PVEPVAVTDI
710 720 730 740 750
QGARVLAKLG DSVTTDHISP ASSIKPGTPA AQYLDEHGVE RHDYNSLGSR
760 770 780 790 800
RGNHEVMMRG TFANIRLQNQ LVDIAGGYTR DFTQEGAPQA FIYDASVNYK
810 820 830 840 850
AAGIPLVVLG GKEYGTGSSR DWAAKGTNLL GIRAVITESF ERIHRSNLIG
860 870 880 890 900
MGVVPLQFPA GESHESLGLD GTETFDITGL TALNEGETPK TVKVTATKEN
910 920 930
GDVVEFDAVV RIDTPGEADY YRHGGILQYV LRQMAASSK
Sequence cautioni
The sequence BAB98933 differs from that shown. Reason: Erroneous initiation. Extended N-terminus.Curated
The sequence CAF21548 differs from that shown. Reason: Erroneous initiation. Extended N-terminus.Curated
Experimental Info
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sequence conflicti | 71 | D → N in BAA76717 (Ref. 1) Curated | 1 | |
Sequence conflicti | 122 | M → V in BAA76717 (Ref. 1) Curated | 1 | |
Sequence conflicti | 555 | I → Y in BAA76717 (Ref. 1) Curated | 1 | |
Sequence conflicti | 745 | N → Y in BAA76717 (Ref. 1) Curated | 1 | |
Sequence conflicti | 888 | T → I in BAA76717 (Ref. 1) Curated | 1 |
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AB025424 Genomic DNA Translation: BAA76717.1 BA000036 Genomic DNA Translation: BAB98933.1 Different initiation. BX927152 Genomic DNA Translation: CAF21548.1 Different initiation. |
RefSeqi | NP_600755.1, NC_003450.3 |
Genome annotation databases
EnsemblBacteriai | BAB98933; BAB98933; BAB98933 CAF21548; CAF21548; cg1737 |
KEGGi | cgb:cg1737 cgl:NCgl1482 |
PATRICi | fig|196627.13.peg.1507 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AB025424 Genomic DNA Translation: BAA76717.1 BA000036 Genomic DNA Translation: BAB98933.1 Different initiation. BX927152 Genomic DNA Translation: CAF21548.1 Different initiation. |
RefSeqi | NP_600755.1, NC_003450.3 |
3D structure databases
SMRi | Q8NQ98 |
ModBasei | Search... |
Protein-protein interaction databases
STRINGi | 196627.cg1737 |
2D gel databases
World-2DPAGEi | 0001:Q8NQ98 |
Genome annotation databases
EnsemblBacteriai | BAB98933; BAB98933; BAB98933 CAF21548; CAF21548; cg1737 |
KEGGi | cgb:cg1737 cgl:NCgl1482 |
PATRICi | fig|196627.13.peg.1507 |
Phylogenomic databases
eggNOGi | COG1048, Bacteria |
HOGENOMi | CLU_013476_2_1_11 |
OMAi | NGGIMQY |
Enzyme and pathway databases
UniPathwayi | UPA00223;UER00718 UPA00946 |
BioCyci | CORYNE:G18NG-11125-MONOMER |
Family and domain databases
CDDi | cd01580, AcnA_IRP_Swivel, 1 hit |
Gene3Di | 3.20.19.10, 1 hit |
InterProi | View protein in InterPro IPR044137, AcnA_IRP_Swivel IPR001030, Acoase/IPM_deHydtase_lsu_aba IPR015928, Aconitase/3IPM_dehydase_swvl IPR006249, Aconitase/IRP2 IPR018136, Aconitase_4Fe-4S_BS IPR036008, Aconitase_4Fe-4S_dom IPR000573, AconitaseA/IPMdHydase_ssu_swvl |
PANTHERi | PTHR11670, PTHR11670, 1 hit |
Pfami | View protein in Pfam PF00330, Aconitase, 1 hit PF00694, Aconitase_C, 1 hit |
PRINTSi | PR00415, ACONITASE |
SUPFAMi | SSF53732, SSF53732, 1 hit |
PROSITEi | View protein in PROSITE PS00450, ACONITASE_1, 1 hit PS01244, ACONITASE_2, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | ACNA_CORGL | |
Accessioni | Q8NQ98Primary (citable) accession number: Q8NQ98 Secondary accession number(s): Q6M550, Q9WXJ0 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | February 7, 2006 |
Last sequence update: | February 7, 2006 | |
Last modified: | February 10, 2021 | |
This is version 118 of the entry and version 2 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Prokaryotic Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
Reference proteomeDocuments
- PATHWAY comments
Index of metabolic and biosynthesis pathways - SIMILARITY comments
Index of protein domains and families