ID   PURR_ACTSZ              Reviewed;         336 AA.
AC   A6VNL0;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   21-AUG-2007, sequence version 1.
DT   03-AUG-2022, entry version 97.
DE   RecName: Full=HTH-type transcriptional repressor PurR {ECO:0000255|HAMAP-Rule:MF_01277};
DE   AltName: Full=Pur regulon repressor {ECO:0000255|HAMAP-Rule:MF_01277};
DE   AltName: Full=Purine nucleotide synthesis repressor {ECO:0000255|HAMAP-Rule:MF_01277};
GN   Name=purR {ECO:0000255|HAMAP-Rule:MF_01277}; OrderedLocusNames=Asuc_1193;
OS   Actinobacillus succinogenes (strain ATCC 55618 / DSM 22257 / CCUG 43843 /
OS   130Z).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Actinobacillus.
OX   NCBI_TaxID=339671;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 55618 / DSM 22257 / CCUG 43843 / 130Z;
RX   PubMed=21118570; DOI=10.1186/1471-2164-11-680;
RA   McKinlay J.B., Laivenieks M., Schindler B.D., McKinlay A.A.,
RA   Siddaramappa S., Challacombe J.F., Lowry S.R., Clum A., Lapidus A.L.,
RA   Burkhart K.B., Harkins V., Vieille C.;
RT   "A genomic perspective on the potential of Actinobacillus succinogenes for
RT   industrial succinate production.";
RL   BMC Genomics 11:680-680(2010).
CC   -!- FUNCTION: Is the main repressor of the genes involved in the de novo
CC       synthesis of purine nucleotides, regulating purB, purC, purEK, purF,
CC       purHD, purL, purMN and guaBA expression. PurR is allosterically
CC       activated to bind its cognate DNA by binding the purine corepressors,
CC       hypoxanthine or guanine, thereby effecting transcription repression.
CC       {ECO:0000255|HAMAP-Rule:MF_01277}.
CC   -!- PATHWAY: Purine metabolism; purine nucleotide biosynthesis
CC       [regulation].
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01277}.
CC   -!- DOMAIN: Consists of two structural and functional domains: an N-
CC       terminal DNA-binding domain, approximately the first 60 residues, and a
CC       larger C-terminal domain, approximately 280 residues, which imparts the
CC       function of corepressor binding and oligomerization.
CC       {ECO:0000255|HAMAP-Rule:MF_01277}.
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DR   EMBL; CP000746; ABR74557.1; -; Genomic_DNA.
DR   RefSeq; WP_012072934.1; NC_009655.1.
DR   AlphaFoldDB; A6VNL0; -.
DR   SMR; A6VNL0; -.
DR   STRING; 339671.Asuc_1193; -.
DR   EnsemblBacteria; ABR74557; ABR74557; Asuc_1193.
DR   KEGG; asu:Asuc_1193; -.
DR   eggNOG; COG1609; Bacteria.
DR   HOGENOM; CLU_037628_6_2_6; -.
DR   OMA; ARWVGPP; -.
DR   OrthoDB; 1796334at2; -.
DR   UniPathway; UPA00488; -.
DR   Proteomes; UP000001114; Chromosome.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0045892; P:negative regulation of transcription, DNA-templated; IEA:UniProtKB-UniRule.
DR   GO; GO:0006164; P:purine nucleotide biosynthetic process; IEA:UniProtKB-UniPathway.
DR   CDD; cd01392; HTH_LacI; 1.
DR   Gene3D; 1.10.260.40; -; 1.
DR   HAMAP; MF_01277; HTH_type_PurR; 1.
DR   InterPro; IPR000843; HTH_LacI.
DR   InterPro; IPR046335; LacI/GalR-like_sensor.
DR   InterPro; IPR010982; Lambda_DNA-bd_dom_sf.
DR   InterPro; IPR028082; Peripla_BP_I.
DR   InterPro; IPR023588; Tscrpt_reg_HTH_PurR.
DR   Pfam; PF00356; LacI; 1.
DR   Pfam; PF13377; Peripla_BP_3; 1.
DR   PRINTS; PR00036; HTHLACI.
DR   SMART; SM00354; HTH_LACI; 1.
DR   SUPFAM; SSF47413; SSF47413; 1.
DR   SUPFAM; SSF53822; SSF53822; 1.
DR   PROSITE; PS00356; HTH_LACI_1; 1.
DR   PROSITE; PS50932; HTH_LACI_2; 1.
PE   3: Inferred from homology;
KW   DNA-binding; Purine biosynthesis; Reference proteome; Repressor;
KW   Transcription; Transcription regulation.
FT   CHAIN           1..336
FT                   /note="HTH-type transcriptional repressor PurR"
FT                   /id="PRO_1000085866"
FT   DOMAIN          2..56
FT                   /note="HTH lacI-type"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01277"
FT   DNA_BIND        4..23
FT                   /note="H-T-H motif"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01277"
FT   DNA_BIND        48..56
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01277"
FT   BINDING         73
FT                   /ligand="hypoxanthine"
FT                   /ligand_id="ChEBI:CHEBI:17368"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01277"
FT   BINDING         189
FT                   /ligand="hypoxanthine"
FT                   /ligand_id="ChEBI:CHEBI:17368"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01277"
FT   BINDING         191
FT                   /ligand="hypoxanthine"
FT                   /ligand_id="ChEBI:CHEBI:17368"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01277"
FT   BINDING         220
FT                   /ligand="hypoxanthine"
FT                   /ligand_id="ChEBI:CHEBI:17368"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01277"
FT   BINDING         274
FT                   /ligand="hypoxanthine"
FT                   /ligand_id="ChEBI:CHEBI:17368"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01277"
SQ   SEQUENCE   336 AA;  37793 MW;  3653B850BC7D6C89 CRC64;
     MATIKDVAKL AGVSTTTVSH VINETRHVAE ETKKIVLNAI EQLHYSPSAV ARSLKVNTTK
     SIGMIVTTSE APYFAEIIHA VEDHCYRQGY SLFLCNTQNN PEKIKNHLEM LAKKRVDGIL
     VMCSEYTADS LDLMKSFSDL PMVVMDWGPV NPNTDRILDN SFEGGYLAGK HLVDNGHKEI
     AYLSAELKKT TARKRYEGFL KALHEAGLEM NPDWLLEGSF EPEDGYECMN RLLAQEFRPT
     AIFCCNDVMA LGAISAITEK GFRVPEDFSV IGYDNVHISR FSAPPLTTIH QSKARLGERA
     LQLLFERIQD KTAKRETIEI HPELVIRKSV KNLNRH