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Protein

Dihydrofolate reductase type 9

Gene

dhfrIX

Organism
Escherichia coli
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

Key enzyme in folate metabolism. Catalyzes an essential reaction for de novo glycine and purine synthesis, and for DNA precursor synthesis (By similarity).By similarity1 Publication

Miscellaneous

Confers trimethoprim resistance.1 Publication

Catalytic activityi

5,6,7,8-tetrahydrofolate + NADP+ = 7,8-dihydrofolate + NADPH.PROSITE-ProRule annotation

Pathwayi: tetrahydrofolate biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes 5,6,7,8-tetrahydrofolate from 7,8-dihydrofolate.
Proteins known to be involved in this subpathway in this organism are:
  1. Dihydrofolate reductase type 8 (dhfrVIII), Dihydrofolate reductase type 9 (dhfrIX), Dihydrofolate reductase (BTQ06_28630), Dihydrofolate reductase, Dihydrofolate reductase (APZ14_00990), Dihydrofolate reductase (dfrB2), Dihydrofolate reductase (dfrA12), Dihydrofolate reductase type A10 (dfrA10), Dihydrofolate reductase (dfrA21), Dihydrofolate reductase (dfr2d), Dihydrofolate reductase type 2, Dihydrofolate reductase type 2, Dihydrofolate reductase (dfrB3), Dihydrofolate reductase type 1 (dhfrI), Dihydrofolate reductase type 5 (dhfrV), Dihydrofolate reductase (dfrA12), Dihydrofolate reductase (dfrA12), Dihydrofolate reductase type 15 (dhfrXV), Dihydrofolate reductase (folA), Dihydrofolate reductase (dfrII), Dihydrofolate reductase (folA), Dihydrofolate reductase (BHS87_26495), Dihydrofolate reductase (ECs0051), Dihydrofolate reductase (dfrA26), Dihydrofolate reductase (dfrA12), Dihydrofolate reductase (dfr2d), Dihydrofolate reductase (folA), Dihydrofolate reductase (folA), Dihydrofolate reductase type A13 (dfrA13), Dihydrofolate reductase (folA), Dihydrofolate reductase (folA), Dihydrofolate reductase (folA), Dihydrofolate reductase type 2, Dihydrofolate reductase (CSB64_27845), Dihydrofolate reductase (dfr2a), Dihydrofolate reductase type 7 (dhfrVII), Dihydrofolate reductase (folA), Dihydrofolate reductase (folA), Dihydrofolate reductase (dfr22), Dihydrofolate reductase (folA), Dihydrofolate reductase (folA), Dihydrofolate reductase (dfrA12), Dihydrofolate reductase (dfrA12), Dihydrofolate reductase (folA), Dihydrofolate reductase (dfrA12), Dihydrofolate reductase (dfrA12), Dihydrofolate reductase (folA), Dihydrofolate reductase (dfr22), Dihydrofolate reductase (dfrA12)
This subpathway is part of the pathway tetrahydrofolate biosynthesis, which is itself part of Cofactor biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes 5,6,7,8-tetrahydrofolate from 7,8-dihydrofolate, the pathway tetrahydrofolate biosynthesis and in Cofactor biosynthesis.

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processAntibiotic resistance, Methotrexate resistance, One-carbon metabolism, Trimethoprim resistance
LigandNADP

Enzyme and pathway databases

UniPathwayiUPA00077; UER00158

Names & Taxonomyi

Protein namesi
Recommended name:
Dihydrofolate reductase type 9 (EC:1.5.1.3)
Alternative name(s):
Dihydrofolate reductase type IX
Gene namesi
Name:dhfrIX
Encoded oniPlasmid pCJOO10 Publication
OrganismiEscherichia coli
Taxonomic identifieri562 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001864271 – 177Dihydrofolate reductase type 9Add BLAST177

Interactioni

Subunit structurei

Homodimer.By similarity

Structurei

3D structure databases

ProteinModelPortaliQ59397
SMRiQ59397
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini3 – 167DHFRPROSITE-ProRule annotationAdd BLAST165

Sequence similaritiesi

Belongs to the dihydrofolate reductase family.Curated

Family and domain databases

CDDicd00209 DHFR, 1 hit
Gene3Di3.40.430.10, 1 hit
InterProiView protein in InterPro
IPR012259 DHFR
IPR024072 DHFR-like_dom_sf
IPR017925 DHFR_CS
IPR001796 DHFR_dom
PANTHERiPTHR22778:SF16 PTHR22778:SF16, 1 hit
PfamiView protein in Pfam
PF00186 DHFR_1, 1 hit
SUPFAMiSSF53597 SSF53597, 1 hit
PROSITEiView protein in PROSITE
PS00075 DHFR_1, 1 hit
PS51330 DHFR_2, 1 hit

Sequencei

Sequence statusi: Complete.

Q59397-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MASLNMIVAV NKTGGIGFEN QIPWHEPEDL KHFKAVTMNS VLIMGRKTFA
60 70 80 90 100
SLPKVLPGRL HVVVSKTVPP TQNTDQVVYV STYQIAVRTA SLLVDKPEYS
110 120 130 140 150
QIFVIGGKSA YENLAAYVDK LYLTRVQLNT QQDTELDLSL FKSWKLVSEV
160 170
PTITENKTKL IFQIWINPNP ISEEPTC
Length:177
Mass (Da):19,879
Last modified:November 1, 1996 - v1
Checksum:iF478DBA8E745ABD0
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X57730 Genomic DNA Translation: CAA40897.1
PIRiA49788
RefSeqiWP_063844475.1, NG_047742.1

Genome annotation databases

KEGGiag:CAA40897

Entry informationi

Entry nameiDYR9_ECOLX
AccessioniPrimary (citable) accession number: Q59397
Entry historyiIntegrated into UniProtKB/Swiss-Prot: November 1, 1997
Last sequence update: November 1, 1996
Last modified: May 23, 2018
This is version 77 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

Plasmid
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Main funding by: National Institutes of Health