AK_MYCSM
ID AK_MYCSM Reviewed; 421 AA.
AC P41403;
DT 01-NOV-1995, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1995, sequence version 1.
DT 03-AUG-2022, entry version 120.
DE RecName: Full=Aspartokinase;
DE EC=2.7.2.4;
DE AltName: Full=Aspartate kinase;
DE Short=ASK;
GN Name=ask;
OS Mycolicibacterium smegmatis (Mycobacterium smegmatis).
OC Bacteria; Actinobacteria; Corynebacteriales; Mycobacteriaceae;
OC Mycolicibacterium.
OX NCBI_TaxID=1772;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC 607 / DSM 43465 / JCM 20379 / NBRC 3207 / NRRL B-692;
RX PubMed=7910936; DOI=10.1111/j.1365-2958.1994.tb00342.x;
RA Cirillo J.D., Weisbrod T.R., Pascopella L., Bloom B.R., Jacobs W.R. Jr.;
RT "Isolation and characterization of the aspartokinase and aspartate
RT semialdehyde dehydrogenase operon from mycobacteria.";
RL Mol. Microbiol. 11:629-639(1994).
CC -!- FUNCTION: Catalyzes the phosphorylation of the beta-carboxyl group of
CC aspartic acid with ATP to yield 4-phospho-L-aspartate, which is
CC involved in the branched biosynthetic pathway leading to the
CC biosynthesis of amino acids lysine, threonine, isoleucine and
CC methionine. {ECO:0000250}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ATP + L-aspartate = 4-phospho-L-aspartate + ADP;
CC Xref=Rhea:RHEA:23776, ChEBI:CHEBI:29991, ChEBI:CHEBI:30616,
CC ChEBI:CHEBI:57535, ChEBI:CHEBI:456216; EC=2.7.2.4;
CC -!- ACTIVITY REGULATION: Feedback inhibition by lysine and threonine.
CC {ECO:0000250}.
CC -!- PATHWAY: Amino-acid biosynthesis; L-lysine biosynthesis via DAP
CC pathway; (S)-tetrahydrodipicolinate from L-aspartate: step 1/4.
CC -!- PATHWAY: Amino-acid biosynthesis; L-methionine biosynthesis via de novo
CC pathway; L-homoserine from L-aspartate: step 1/3.
CC -!- PATHWAY: Amino-acid biosynthesis; L-threonine biosynthesis; L-threonine
CC from L-aspartate: step 1/5.
CC -!- SUBUNIT: Heterotetramer consisting of 2 isoforms Alpha (catalytic and
CC regulation) and of a homodimer of 2 isoforms Beta (regulation).
CC -!- ALTERNATIVE PRODUCTS:
CC Event=Alternative initiation; Named isoforms=2;
CC Name=Alpha; Synonyms=Aspartokinase subunit alpha;
CC IsoId=P41403-1; Sequence=Displayed;
CC Name=Beta; Synonyms=Aspartokinase subunit beta;
CC IsoId=P41403-2; Sequence=VSP_018662;
CC -!- SIMILARITY: Belongs to the aspartokinase family. {ECO:0000305}.
CC -!- SEQUENCE CAUTION:
CC Sequence=CAA78985.1; Type=Erroneous initiation; Note=Truncated N-terminus.; Evidence={ECO:0000305};
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DR EMBL; Z17372; CAA78984.1; -; Genomic_DNA.
DR EMBL; Z17372; CAA78985.1; ALT_INIT; Genomic_DNA.
DR PIR; S42422; S42422.
DR RefSeq; WP_003897679.1; NZ_UGQO01000001.1. [P41403-1]
DR AlphaFoldDB; P41403; -.
DR SMR; P41403; -.
DR GeneID; 66737540; -.
DR OMA; DMIVQTI; -.
DR UniPathway; UPA00034; UER00015.
DR UniPathway; UPA00050; UER00461.
DR UniPathway; UPA00051; UER00462.
DR GO; GO:0004072; F:aspartate kinase activity; IEA:UniProtKB-EC.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR GO; GO:0019877; P:diaminopimelate biosynthetic process; IEA:UniProtKB-KW.
DR GO; GO:0009089; P:lysine biosynthetic process via diaminopimelate; IEA:UniProtKB-UniPathway.
DR GO; GO:0016310; P:phosphorylation; IEA:UniProtKB-KW.
DR GO; GO:0009088; P:threonine biosynthetic process; IEA:UniProtKB-UniPathway.
DR CDD; cd04261; AAK_AKii-LysC-BS; 1.
DR Gene3D; 3.40.1160.10; -; 1.
DR InterPro; IPR036393; AceGlu_kinase-like_sf.
DR InterPro; IPR045865; ACT-like_dom_sf.
DR InterPro; IPR002912; ACT_dom.
DR InterPro; IPR041740; AKii-LysC-BS.
DR InterPro; IPR001048; Asp/Glu/Uridylate_kinase.
DR InterPro; IPR005260; Asp_kin_monofn.
DR InterPro; IPR001341; Asp_kinase.
DR InterPro; IPR018042; Aspartate_kinase_CS.
DR InterPro; IPR027795; CASTOR_ACT_dom.
DR Pfam; PF00696; AA_kinase; 1.
DR Pfam; PF01842; ACT; 1.
DR Pfam; PF13840; ACT_7; 1.
DR PIRSF; PIRSF000726; Asp_kin; 1.
DR SUPFAM; SSF53633; SSF53633; 1.
DR SUPFAM; SSF55021; SSF55021; 2.
DR TIGRFAMs; TIGR00656; asp_kin_monofn; 1.
DR TIGRFAMs; TIGR00657; asp_kinases; 1.
DR PROSITE; PS51671; ACT; 1.
DR PROSITE; PS00324; ASPARTOKINASE; 1.
PE 3: Inferred from homology;
KW Alternative initiation; Amino-acid biosynthesis; ATP-binding;
KW Diaminopimelate biosynthesis; Kinase; Lysine biosynthesis;
KW Nucleotide-binding; Repeat; Transferase.
FT CHAIN 1..421
FT /note="Aspartokinase"
FT /id="PRO_0000002383"
FT DOMAIN 267..348
FT /note="ACT 1"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01007"
FT DOMAIN 349..421
FT /note="ACT 2"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01007"
FT BINDING 7..10
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250"
FT BINDING 25..30
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 41
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250"
FT BINDING 45..49
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 74
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 125..126
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 151..154
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 154
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 174..175
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250"
FT BINDING 180..185
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250"
FT BINDING 210
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250"
FT BINDING 274..279
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 274
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 292..294
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 298
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 360..361
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 374..375
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 381..382
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT SITE 7
FT /note="Contribution to the catalysis"
FT /evidence="ECO:0000250"
FT SITE 74
FT /note="Contribution to the catalysis"
FT /evidence="ECO:0000250"
FT VAR_SEQ 1..249
FT /note="Missing (in isoform Beta)"
FT /evidence="ECO:0000305"
FT /id="VSP_018662"
SQ SEQUENCE 421 AA; 44458 MW; 926B9FC8625E20CD CRC64;
MALVVQKYGG SSVADAERIR RVAERIVETK KAGNDVVVVV SAMGDTTDDL LDLARQVSPA
PPPREMDMLL TAGERISNAL VAMAIESLGA QARSFTGSQA GVITTGTHGN AKIIDVTPGR
LRDALDEGQI VLVAGFQGVS QDSKDVTTLG RGGSDTTAVA VAAALDADVC EIYTDVDGIF
TADPRIVPNA RHLDTVSFEE MLEMAACGAK VLMLRCVEYA RRYNVPIHVR SSYSDKPGTI
VKGSIEDIPM EDAILTGVAH DRSEAKVTVV GLPDVPGYAA KVFRAVAEAD VNIDMVLQNI
SKIEDGKTDI TFTCARDNGP RAVEKLSALK SEIGFSQVLY DDHIGKVSLI GAGMRSHPGV
TATFCEALAE AGINIDLIST SEIRISVLIK DTELDKAVSA LHEAFGLGGD DEAVVYAGTG
R
