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Protein

HTH-type transcriptional repressor PurR

Gene

purR

Organism
Escherichia coli O17:K52:H18 (strain UMN026 / ExPEC)
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

Is the main repressor of the genes involved in the de novo synthesis of purine nucleotides, regulating purB, purC, purEK, purF, purHD, purL, purMN and guaBA expression. PurR is allosterically activated to bind its cognate DNA by binding the purine corepressors, hypoxanthine or guanine, thereby effecting transcription repression.UniRule annotation

Pathwayi: purine nucleotide biosynthesis

This protein regulates the pathway purine nucleotide biosynthesis, which is part of Purine metabolism.
View all proteins of this organism that are known to be involved in the pathway purine nucleotide biosynthesis and in Purine metabolism.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei73CorepressorUniRule annotation1
Binding sitei190CorepressorUniRule annotation1
Binding sitei192CorepressorUniRule annotation1
Binding sitei221CorepressorUniRule annotation1
Binding sitei275CorepressorUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
DNA bindingi4 – 23H-T-H motifUniRule annotationAdd BLAST20
DNA bindingi48 – 56UniRule annotation9

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionDNA-binding, Repressor
Biological processPurine biosynthesis, Transcription, Transcription regulation

Enzyme and pathway databases

UniPathwayi
UPA00488

Names & Taxonomyi

Protein namesi
Recommended name:
HTH-type transcriptional repressor PurRUniRule annotation
Alternative name(s):
Pur regulon repressorUniRule annotation
Purine nucleotide synthesis repressorUniRule annotation
Gene namesi
Name:purRUniRule annotation
Ordered Locus Names:ECUMN_1948
OrganismiEscherichia coli O17:K52:H18 (strain UMN026 / ExPEC)
Taxonomic identifieri585056 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
Proteomesi
  • UP000007097 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_10001402901 – 341HTH-type transcriptional repressor PurRAdd BLAST341

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliB7NBB1
SMRiB7NBB1
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini2 – 56HTH lacI-typeUniRule annotationAdd BLAST55

Domaini

Consists of two structural and functional domains: an N-terminal DNA-binding domain, approximately the first 60 residues, and a larger C-terminal domain, approximately 280 residues, which imparts the function of corepressor binding and oligomerization.UniRule annotation

Phylogenomic databases

HOGENOMiHOG000220180
KOiK03604
OMAiTIEVHPR

Family and domain databases

CDDicd01392 HTH_LacI, 1 hit
HAMAPiMF_01277 HTH_type_PurR, 1 hit
InterProiView protein in InterPro
IPR000843 HTH_LacI
IPR010982 Lambda_DNA-bd_dom_sf
IPR028082 Peripla_BP_I
IPR023588 Tscrpt_reg_HTH_PurR
PfamiView protein in Pfam
PF00356 LacI, 1 hit
PRINTSiPR00036 HTHLACI
SMARTiView protein in SMART
SM00354 HTH_LACI, 1 hit
SUPFAMiSSF47413 SSF47413, 1 hit
SSF53822 SSF53822, 1 hit
PROSITEiView protein in PROSITE
PS00356 HTH_LACI_1, 1 hit
PS50932 HTH_LACI_2, 1 hit

Sequencei

Sequence statusi: Complete.

B7NBB1-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MATIKDVAKR ANVSTTTVSH VINKTRFVAE ETRNAVWAAI KELHYSPSAV
60 70 80 90 100
ARSLKVNHTK SIGLLATSSE AAYFAEIIEA VEKNCFQKGY TLILGNAWNN
110 120 130 140 150
LEKQRAYLSM MAQKRVDGLL VMCSEYPEPL LAMLEEYRHI PMVVMDWGEA
160 170 180 190 200
KADFTDAVID NAFEGGYMAG RYLIERGHRE IGVIPGPLER NTGAGRLAGF
210 220 230 240 250
MKAMEEAMIK VPESWIVQGD FEPESGYRAM QQILSQPHRP TAVFCGGDIM
260 270 280 290 300
AMGALCAADE MGLRVPQDVS LIGYDNVRNA RYFTPALTTI HQPKDSLGET
310 320 330 340
AFNMLLDRIV NKREEPQSIE VHPRLIERRS VADGPFRDYR R
Length:341
Mass (Da):38,175
Last modified:March 24, 2009 - v1
Checksum:i5D1DA7CA6C72FBBC
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CU928163 Genomic DNA Translation: CAR13145.1
RefSeqiWP_000190982.1, NC_011751.1
YP_002412677.1, NC_011751.1

Genome annotation databases

EnsemblBacteriaiCAR13145; CAR13145; ECUMN_1948
GeneIDi7158679
KEGGieum:ECUMN_1948
PATRICifig|585056.7.peg.2135

Similar proteinsi

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CU928163 Genomic DNA Translation: CAR13145.1
RefSeqiWP_000190982.1, NC_011751.1
YP_002412677.1, NC_011751.1

3D structure databases

ProteinModelPortaliB7NBB1
SMRiB7NBB1
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiCAR13145; CAR13145; ECUMN_1948
GeneIDi7158679
KEGGieum:ECUMN_1948
PATRICifig|585056.7.peg.2135

Phylogenomic databases

HOGENOMiHOG000220180
KOiK03604
OMAiTIEVHPR

Enzyme and pathway databases

UniPathwayi
UPA00488

Family and domain databases

CDDicd01392 HTH_LacI, 1 hit
HAMAPiMF_01277 HTH_type_PurR, 1 hit
InterProiView protein in InterPro
IPR000843 HTH_LacI
IPR010982 Lambda_DNA-bd_dom_sf
IPR028082 Peripla_BP_I
IPR023588 Tscrpt_reg_HTH_PurR
PfamiView protein in Pfam
PF00356 LacI, 1 hit
PRINTSiPR00036 HTHLACI
SMARTiView protein in SMART
SM00354 HTH_LACI, 1 hit
SUPFAMiSSF47413 SSF47413, 1 hit
SSF53822 SSF53822, 1 hit
PROSITEiView protein in PROSITE
PS00356 HTH_LACI_1, 1 hit
PS50932 HTH_LACI_2, 1 hit
ProtoNetiSearch...

Entry informationi

Entry nameiPURR_ECOLU
AccessioniPrimary (citable) accession number: B7NBB1
Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 14, 2009
Last sequence update: March 24, 2009
Last modified: November 7, 2018
This is version 60 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
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Main funding by: National Institutes of Health

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