ID   PANCY_PROMT             Reviewed;         516 AA.
AC   Q46IM3;
DT   13-JUN-2006, integrated into UniProtKB/Swiss-Prot.
DT   13-SEP-2005, sequence version 1.
DT   27-MAR-2024, entry version 101.
DE   RecName: Full=Bifunctional pantoate ligase/cytidylate kinase {ECO:0000255|HAMAP-Rule:MF_01349};
DE   Includes:
DE     RecName: Full=Pantothenate synthetase {ECO:0000255|HAMAP-Rule:MF_01349};
DE              Short=PS {ECO:0000255|HAMAP-Rule:MF_01349};
DE              EC=6.3.2.1 {ECO:0000255|HAMAP-Rule:MF_01349};
DE     AltName: Full=Pantoate--beta-alanine ligase {ECO:0000255|HAMAP-Rule:MF_01349};
DE     AltName: Full=Pantoate-activating enzyme {ECO:0000255|HAMAP-Rule:MF_01349};
DE   Includes:
DE     RecName: Full=Cytidylate kinase {ECO:0000255|HAMAP-Rule:MF_01349};
DE              Short=CK {ECO:0000255|HAMAP-Rule:MF_01349};
DE              EC=2.7.4.25 {ECO:0000255|HAMAP-Rule:MF_01349};
DE     AltName: Full=Cytidine monophosphate kinase {ECO:0000255|HAMAP-Rule:MF_01349};
DE              Short=CMP kinase {ECO:0000255|HAMAP-Rule:MF_01349};
GN   Name=panC/cmk {ECO:0000255|HAMAP-Rule:MF_01349};
GN   OrderedLocusNames=PMN2A_1165;
OS   Prochlorococcus marinus (strain NATL2A).
OC   Bacteria; Cyanobacteriota; Cyanophyceae; Synechococcales;
OC   Prochlorococcaceae; Prochlorococcus.
OX   NCBI_TaxID=59920;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NATL2A;
RX   PubMed=18159947; DOI=10.1371/journal.pgen.0030231;
RA   Kettler G.C., Martiny A.C., Huang K., Zucker J., Coleman M.L., Rodrigue S.,
RA   Chen F., Lapidus A., Ferriera S., Johnson J., Steglich C., Church G.M.,
RA   Richardson P., Chisholm S.W.;
RT   "Patterns and implications of gene gain and loss in the evolution of
RT   Prochlorococcus.";
RL   PLoS Genet. 3:2515-2528(2007).
CC   -!- FUNCTION: Catalyzes the condensation of pantoate with beta-alanine in
CC       an ATP-dependent reaction via a pantoyl-adenylate intermediate.
CC       {ECO:0000255|HAMAP-Rule:MF_01349}.
CC   -!- FUNCTION: Catalyzes the transfer of a phosphate group from ATP to
CC       either CMP or dCMP to form CDP or dCDP and ADP, respectively.
CC       {ECO:0000255|HAMAP-Rule:MF_01349}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(R)-pantoate + ATP + beta-alanine = (R)-pantothenate + AMP +
CC         diphosphate + H(+); Xref=Rhea:RHEA:10912, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:15980, ChEBI:CHEBI:29032, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:33019, ChEBI:CHEBI:57966, ChEBI:CHEBI:456215; EC=6.3.2.1;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01349};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + CMP = ADP + CDP; Xref=Rhea:RHEA:11600,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:58069, ChEBI:CHEBI:60377,
CC         ChEBI:CHEBI:456216; EC=2.7.4.25; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01349};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + dCMP = ADP + dCDP; Xref=Rhea:RHEA:25094,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:57566, ChEBI:CHEBI:58593,
CC         ChEBI:CHEBI:456216; EC=2.7.4.25; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01349};
CC   -!- PATHWAY: Cofactor biosynthesis; (R)-pantothenate biosynthesis; (R)-
CC       pantothenate from (R)-pantoate and beta-alanine: step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_01349}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01349}.
CC   -!- SIMILARITY: In the N-terminal section; belongs to the pantothenate
CC       synthetase family. {ECO:0000255|HAMAP-Rule:MF_01349}.
CC   -!- SIMILARITY: In the C-terminal section; belongs to the cytidylate kinase
CC       family. Type 1 subfamily. {ECO:0000255|HAMAP-Rule:MF_01349}.
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DR   EMBL; CP000095; AAZ58655.1; -; Genomic_DNA.
DR   RefSeq; WP_011295509.1; NC_007335.2.
DR   AlphaFoldDB; Q46IM3; -.
DR   SMR; Q46IM3; -.
DR   STRING; 59920.PMN2A_1165; -.
DR   KEGG; pmn:PMN2A_1165; -.
DR   HOGENOM; CLU_037427_0_0_3; -.
DR   OrthoDB; 9773087at2; -.
DR   PhylomeDB; Q46IM3; -.
DR   UniPathway; UPA00028; UER00005.
DR   Proteomes; UP000002535; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0036430; F:CMP kinase activity; IEA:RHEA.
DR   GO; GO:0036431; F:dCMP kinase activity; IEA:RHEA.
DR   GO; GO:0004592; F:pantoate-beta-alanine ligase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0015940; P:pantothenate biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0016310; P:phosphorylation; IEA:UniProtKB-KW.
DR   GO; GO:0006220; P:pyrimidine nucleotide metabolic process; IEA:UniProtKB-UniRule.
DR   CDD; cd02020; CMPK; 1.
DR   Gene3D; 3.40.50.620; HUPs; 1.
DR   Gene3D; 3.40.50.300; P-loop containing nucleotide triphosphate hydrolases; 1.
DR   Gene3D; 3.30.1300.10; Pantoate-beta-alanine ligase, C-terminal domain; 1.
DR   HAMAP; MF_00238; Cytidyl_kinase_type1; 1.
DR   HAMAP; MF_00158; PanC; 1.
DR   HAMAP; MF_01349; PanCY; 1.
DR   InterPro; IPR003136; Cytidylate_kin.
DR   InterPro; IPR011994; Cytidylate_kinase_dom.
DR   InterPro; IPR027417; P-loop_NTPase.
DR   InterPro; IPR003721; Pantoate_ligase.
DR   InterPro; IPR024894; Pantoate_ligase/cytidylate_kin.
DR   InterPro; IPR042176; Pantoate_ligase_C.
DR   InterPro; IPR014729; Rossmann-like_a/b/a_fold.
DR   NCBIfam; TIGR00017; cmk; 1.
DR   NCBIfam; TIGR00018; panC; 1.
DR   PANTHER; PTHR21299; CYTIDYLATE KINASE/PANTOATE-BETA-ALANINE LIGASE; 1.
DR   PANTHER; PTHR21299:SF1; PANTOATE--BETA-ALANINE LIGASE; 1.
DR   Pfam; PF02224; Cytidylate_kin; 1.
DR   Pfam; PF02569; Pantoate_ligase; 1.
DR   SUPFAM; SSF52374; Nucleotidylyl transferase; 1.
DR   SUPFAM; SSF52540; P-loop containing nucleoside triphosphate hydrolases; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Cytoplasm; Kinase; Ligase; Multifunctional enzyme;
KW   Nucleotide-binding; Pantothenate biosynthesis; Reference proteome;
KW   Transferase.
FT   CHAIN           1..516
FT                   /note="Bifunctional pantoate ligase/cytidylate kinase"
FT                   /id="PRO_0000239793"
FT   REGION          1..279
FT                   /note="Pantoate--beta-alanine ligase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01349"
FT   REGION          280..516
FT                   /note="Cytidylate kinase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01349"
FT   ACT_SITE        36
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01349"
FT   BINDING         29..36
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01349"
FT   BINDING         64
FT                   /ligand="(R)-pantoate"
FT                   /ligand_id="ChEBI:CHEBI:15980"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01349"
FT   BINDING         64
FT                   /ligand="beta-alanine"
FT                   /ligand_id="ChEBI:CHEBI:57966"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01349"
FT   BINDING         153..156
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01349"
FT   BINDING         159
FT                   /ligand="(R)-pantoate"
FT                   /ligand_id="ChEBI:CHEBI:15980"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01349"
FT   BINDING         190..193
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01349"
SQ   SEQUENCE   516 AA;  58289 MW;  3980DA9C3BFB07FA CRC64;
     MVRKIFQTNA ELKDWLSGQN SAIIFIPTMG GLHPGHQYLI QKAKEKKTNT NQIILVSIFV
     NPLQFSKGED FKKYPRNIKR DAELAFSAGA DAIWAPEYDE VFPGGADSHF KIEVPKTLHN
     QLCGAERKGH FDGVATVIIR LIKIIKPKKL ILGEKDWQQL IIIRKLFQEL SIPVKIESYS
     TQRDQSGFAY SSRNSYLSDS ERVNAQSLPN AIKEAKTEFD KGKVINLTKI ASIFKENNLK
     IEYLKIVDPF SLKETENINR LCLLAIAVKC GSTRLIDHTF LMHRKPIIAI DGPAGAGKST
     VTKAFAKKLG FIYLDTGAMY RAVTWLIISN SIDPNDQAEI KNILKDSKLE FKNSSFVEQK
     IFINNIDVTE KIRSPQVTSM VSEIAKQQFV REVLTRKQQV IGNNGGLVAE GRDIGTAVFP
     DADLKIFLTA SPTERAKRRA LDLHKRGYEF SSIEDLEKEI KERDKKDSER KIAPLKKAQD
     AIELVTDGMN IEDVLKELID IFRSKIPEEV WPTPNS
//