ID U3BHA0_VIBPR Unreviewed; 334 AA.
AC U3BHA0;
DT 13-NOV-2013, integrated into UniProtKB/TrEMBL.
DT 13-NOV-2013, sequence version 1.
DT 27-MAR-2024, entry version 58.
DE RecName: Full=HTH-type transcriptional repressor PurR {ECO:0000256|HAMAP-Rule:MF_01277};
DE AltName: Full=Pur regulon repressor {ECO:0000256|HAMAP-Rule:MF_01277};
DE AltName: Full=Purine nucleotide synthesis repressor {ECO:0000256|HAMAP-Rule:MF_01277};
GN Name=purR {ECO:0000256|HAMAP-Rule:MF_01277,
GN ECO:0000313|EMBL:GAD66063.1};
GN ORFNames=VPR01S_02_03140 {ECO:0000313|EMBL:GAD66063.1};
OS Vibrio proteolyticus NBRC 13287.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Vibrionales; Vibrionaceae;
OC Vibrio.
OX NCBI_TaxID=1219065 {ECO:0000313|EMBL:GAD66063.1, ECO:0000313|Proteomes:UP000016570};
RN [1] {ECO:0000313|EMBL:GAD66063.1, ECO:0000313|Proteomes:UP000016570}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NBRC 13287 {ECO:0000313|EMBL:GAD66063.1,
RC ECO:0000313|Proteomes:UP000016570};
RA Isaki S., Hosoyama A., Numata M., Hashimoto M., Hosoyama Y., Tsuchikane K.,
RA Noguchi M., Hirakata S., Ichikawa N., Ohji S., Yamazoe A., Fujita N.;
RT "Whole genome shotgun sequence of Vibrio proteolyticus NBRC 13287.";
RL Submitted (SEP-2013) to the EMBL/GenBank/DDBJ databases.
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:0000256|HAMAP-Rule:MF_01277}.
CC -!- PATHWAY: Purine metabolism; purine nucleotide biosynthesis
CC [regulation]. {ECO:0000256|ARBA:ARBA00004693, ECO:0000256|HAMAP-
CC Rule:MF_01277}.
CC -!- SUBUNIT: Homodimer. {ECO:0000256|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:0000256|HAMAP-Rule:MF_01277}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_01277}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:GAD66063.1}.
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DR EMBL; BATJ01000002; GAD66063.1; -; Genomic_DNA.
DR RefSeq; WP_021704053.1; NZ_BATJ01000002.1.
DR AlphaFoldDB; U3BHA0; -.
DR STRING; 1219065.VPR01S_02_03140; -.
DR eggNOG; COG1609; Bacteria.
DR UniPathway; UPA00488; -.
DR Proteomes; UP000016570; Unassembled WGS sequence.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR GO; GO:0045892; P:negative regulation of DNA-templated transcription; IEA:UniProtKB-UniRule.
DR GO; GO:0006164; P:purine nucleotide biosynthetic process; IEA:UniProtKB-UniPathway.
DR CDD; cd01392; HTH_LacI; 1.
DR CDD; cd06275; PBP1_PurR; 1.
DR Gene3D; 3.40.50.2300; -; 2.
DR Gene3D; 1.10.260.40; lambda repressor-like DNA-binding domains; 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 PANTHER; PTHR30146:SF152; HTH-TYPE TRANSCRIPTIONAL REGULATOR EBGR-RELATED; 1.
DR PANTHER; PTHR30146; LACI-RELATED TRANSCRIPTIONAL REPRESSOR; 1.
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; lambda repressor-like DNA-binding domains; 1.
DR SUPFAM; SSF53822; Periplasmic binding protein-like I; 1.
DR PROSITE; PS00356; HTH_LACI_1; 1.
DR PROSITE; PS50932; HTH_LACI_2; 1.
PE 3: Inferred from homology;
KW DNA-binding {ECO:0000256|ARBA:ARBA00023125, ECO:0000256|HAMAP-
KW Rule:MF_01277};
KW Purine biosynthesis {ECO:0000256|ARBA:ARBA00022755, ECO:0000256|HAMAP-
KW Rule:MF_01277}; Reference proteome {ECO:0000313|Proteomes:UP000016570};
KW Repressor {ECO:0000256|HAMAP-Rule:MF_01277};
KW Transcription {ECO:0000256|ARBA:ARBA00023163, ECO:0000256|HAMAP-
KW Rule:MF_01277};
KW Transcription regulation {ECO:0000256|ARBA:ARBA00023015, ECO:0000256|HAMAP-
KW Rule:MF_01277}.
FT DOMAIN 2..56
FT /note="HTH lacI-type"
FT /evidence="ECO:0000259|PROSITE:PS50932"
FT DNA_BIND 4..23
FT /note="H-T-H motif"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01277"
FT DNA_BIND 48..56
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01277"
FT BINDING 73
FT /ligand="hypoxanthine"
FT /ligand_id="ChEBI:CHEBI:17368"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01277"
FT BINDING 189
FT /ligand="hypoxanthine"
FT /ligand_id="ChEBI:CHEBI:17368"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01277"
FT BINDING 220
FT /ligand="hypoxanthine"
FT /ligand_id="ChEBI:CHEBI:17368"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01277"
FT BINDING 274
FT /ligand="hypoxanthine"
FT /ligand_id="ChEBI:CHEBI:17368"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01277"
SQ SEQUENCE 334 AA; 37612 MW; 25B6513AD0F29A20 CRC64;
MATIKDVARL AGVSTTTVSH VINKTRFVAE ATQEKVMEAV KELNYAPSAV ARSLKCNTTR
TIGMLVTQST NLFFSEVIDG VESYCYRQGY TLILCNTGGI YEKQRDYIRM LAEKRVDGIL
VMCSDLTEEL SEMLERHADI PKVIMDWGPA SSQADKIIDN SEEGGYLATK YLIDHGHTDI
ACLSGHFEKA ACQERILGFR RAMGEAKLPV NEDWILEGNF ECDTAVLAAD KIAAMDKRPT
AIFCFNDTMA LGLMSRLQQK GIRVPEDMSV IGYDNIELAE YFSPPLTTVH QPKRRVGKNA
FEILLERIKD KEHEKRVFEM HPEIVERCTV KKLN
//
