[1]	NUCLEOTIDE SEQUENCE [GENOMIC DNA]. STRAIN=3926; PubMed=1659308 [NCBI, ExPASy, EBI, Israel, Japan] Jansson C., Skoeld O.; "Appearance of a new trimethoprim resistance gene, dhfrIX, in Escherichia coli from swine."; Antimicrob. Agents Chemother. 35:1891-1899(1991).

Comments

FUNCTION: Confers trimethoprim resistance.
CATALYTIC ACTIVITY: 5,6,7,8-tetrahydrofolate + NADP⁺ = 7,8-dihydrofolate + NADPH.
PATHWAY: Cofactor biosynthesis; tetrahydrofolate biosynthesis; tetrahydrofolate from dihydrofolate: step 1/1 .
SUBUNIT: Homodimer (By similarity).
MISCELLANEOUS: The reaction catalyzed by this enzyme represents an essential step for de novo glycine and purine synthesis, DNA precursor synthesis, and for the conversion of dUMP to dTMP.
SIMILARITY: Belongs to the dihydrofolate reductase family.
SIMILARITY: Contains 1 DHFR (dihydrofolate reductase) domain.

Copyright

Copyrighted by the UniProt Consortium, see http://www.uniprot.org/terms. Distributed under the Creative Commons Attribution-NoDerivs License.

Cross-references

Sequence databases

EMBL

X57730; CAA40897.1; -; Genomic_DNA.

[EMBL / GenBank / DDBJ] [CoDingSequence]

PIR

A49788; A49788.

3D structure databases

HSSP

P00379; 1DHI. [HSSP ENTRY / SWISS-3DIMAGE / PDB]

ModBase

Q59397.

Ontologies

GO:0004146;	Molecular function: dihydrofolate reductase activity (inferred from electronic annotation from InterPro).
GO:0050661;	Molecular function: NADP binding (inferred from electronic annotation from InterPro).
GO:0006545;	Biological process: glycine biosynthetic process (inferred from electronic annotation from InterPro).
GO:0009165;	Biological process: nucleotide biosynthetic process (inferred from electronic annotation from InterPro).
GO:0006730;	Biological process: one-carbon compound metabolic process (inferred from electronic annotation from UniProtKB-KW).
GO:0055114;	Biological process: oxidation reduction (inferred from electronic annotation from UniProtKB-KW).
GO:0046677;	Biological process: response to antibiotic (inferred from electronic annotation from UniProtKB-KW).
GO:0031427;	Biological process: response to methotrexate (inferred from electronic annotation from UniProtKB-KW).
QuickGo view.

Family and domain databases

InterPro

IPR012259; DHFR.
IPR001796; DHFR_reg.
Graphical view of domain structure.

PANTHER

PTHR11549:SF1; DHFR; 1.

Pfam

PF00186; DHFR_1; 1.
Pfam graphical view of domain structure.

PRINTS

PR00070; DHFR.

PROSITE

PS00075; DHFR_1; 1.
PS51330; DHFR_2; 1.
PROSITE graphical view of domain structure (profiles).

Other

ProtoNet

Q59397.

UniRef

View cluster of proteins with at least 50% / 90% / 100% identity.

Keywords

Antibiotic resistance; Methotrexate resistance; NADP; One-carbon metabolism; Oxidoreductase; Plasmid; Trimethoprim resistance.

Features

Feature table viewer

Feature aligner

`Key`	`From To`	`Length`	`Description`	`FTId`
`CHAIN`	`1 177`	`177`	`Dihydrofolate reductase type 9.`	`PRO_0000186427`
`DOMAIN`	`3 167`	`165`	`DHFR.`

Sequence information

Length: 177 AA [This is the length of the unprocessed precursor]

Molecular weight: 19879 Da [This is the MW of the unprocessed precursor]

CRC64: F478DBA8E745ABD0 [This is a checksum on the sequence]

        10         20         30         40         50         60 
MASLNMIVAV NKTGGIGFEN QIPWHEPEDL KHFKAVTMNS VLIMGRKTFA SLPKVLPGRL 

        70         80         90        100        110        120 
HVVVSKTVPP TQNTDQVVYV STYQIAVRTA SLLVDKPEYS QIFVIGGKSA YENLAAYVDK 

       130        140        150        160        170 
LYLTRVQLNT QQDTELDLSL FKSWKLVSEV PTITENKTKL IFQIWINPNP ISEEPTC

Q59397 in FASTA format

View entry in original UniProtKB/Swiss-Prot format
View entry in raw text format (no links)
Report form for errors/updates in this UniProtKB/Swiss-Prot entry

	BLAST submission on ExPASy/SIB or at NCBI (USA)		Sequence analysis tools: ProtParam, ProtScale, Compute pI/Mw, PeptideMass, PeptideCutter, Dotlet (Java)
	ScanProsite, MotifScan		Submit a homology modeling request to SWISS-MODEL
	NPSA Sequence analysis tools