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Protein

Bifunctional dihydrofolate reductase-thymidylate synthase

Gene
N/A
Organism
Crithidia fasciculata
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Protein inferred from homologyi

Functioni

Bifunctional enzyme. Involved in de novo dTMP biosynthesis. Key enzyme in folate metabolism. Catalyzes an essential reaction for de novo glycine and purine synthesis, DNA precursor synthesis, and for the conversion of dUMP to dTMP (By similarity).By similarity

Catalytic activityi

5,6,7,8-tetrahydrofolate + NADP+ = 7,8-dihydrofolate + NADPH.
5,10-methylenetetrahydrofolate + dUMP = dihydrofolate + dTMP.

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. Bifunctional dihydrofolate reductase-thymidylate synthase
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.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei30Substrate; via carbonyl oxygenBy similarity1
Binding sitei32NADP; via amide nitrogen and carbonyl oxygenBy similarity1
Binding sitei154Substrate; via carbonyl oxygenBy similarity1
Binding sitei160SubstrateBy similarity1
Binding sitei178SubstrateBy similarity1
Binding sitei253dUMPBy similarity1
Active sitei395By similarity1
Binding sitei396dUMPBy similarity1
Binding sitei428dUMPBy similarity1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi38 – 44NADPBy similarity7
Nucleotide bindingi81 – 83NADPBy similarity3
Nucleotide bindingi101 – 104NADPBy similarity4
Nucleotide bindingi155 – 162NADPBy similarity8
Nucleotide bindingi416 – 420dUMPBy similarity5
Nucleotide bindingi458 – 460dUMPBy similarity3

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Methyltransferase, Oxidoreductase, Transferase

Keywords - Biological processi

Nucleotide biosynthesis, One-carbon metabolism

Keywords - Ligandi

NADP

Enzyme and pathway databases

UniPathwayiUPA00077; UER00158.

Names & Taxonomyi

Protein namesi
Recommended name:
Bifunctional dihydrofolate reductase-thymidylate synthase
Short name:
DHFR-TS
Including the following 2 domains:
Dihydrofolate reductase (EC:1.5.1.3)
Thymidylate synthase (EC:2.1.1.45)
OrganismiCrithidia fasciculata
Taxonomic identifieri5656 [NCBI]
Taxonomic lineageiEukaryotaEuglenozoaKinetoplastidaTrypanosomatidaeLeishmaniinaeCrithidia

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001863431 – 515Bifunctional dihydrofolate reductase-thymidylate synthaseAdd BLAST515

Proteomic databases

PRIDEiQ23695.

Structurei

3D structure databases

ProteinModelPortaliQ23695.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini26 – 228DHFRAdd BLAST203

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni233 – 515Thymidylate synthaseAdd BLAST283

Sequence similaritiesi

In the N-terminal section; belongs to the dihydrofolate reductase family.Curated
In the C-terminal section; belongs to the thymidylate synthase family.Curated

Family and domain databases

CDDicd00209. DHFR. 1 hit.
cd00351. TS_Pyrimidine_HMase. 1 hit.
Gene3Di3.30.572.10. 1 hit.
3.40.430.10. 1 hit.
HAMAPiMF_00008. Thymidy_synth_bact. 1 hit.
InterProiIPR024072. DHFR-like_dom.
IPR001796. DHFR_dom.
IPR023451. Thymidate_synth/dCMP_Mease.
IPR000398. Thymidylate_synthase.
IPR020940. Thymidylate_synthase_AS.
[Graphical view]
PfamiPF00186. DHFR_1. 1 hit.
PF00303. Thymidylat_synt. 1 hit.
[Graphical view]
PRINTSiPR00108. THYMDSNTHASE.
SUPFAMiSSF53597. SSF53597. 1 hit.
SSF55831. SSF55831. 1 hit.
TIGRFAMsiTIGR03284. thym_sym. 1 hit.
PROSITEiPS51330. DHFR_2. 1 hit.
PS00091. THYMIDYLATE_SYNTHASE. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q23695-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSRAAAKFKI PMPVTKADFA FPSLRAFSIV VAADQQHGIG DGETIPWTVP
60 70 80 90 100
ETLAFFKDQT TLLRNKKPPT EKKRNAVVMG RKTWEVPLKF RPLKGRLNVV
110 120 130 140 150
LSCRRPVDDL LAQLPEEKRA AAAADVVING GLKEALHLLA RPPYCSSIET
160 170 180 190 200
AYCIGGARVY TEAMQSPCVE KLKEVYLTRV HTAPTCNRFY EFVRRRRARA
210 220 230 240 250
AVDLESTSGV KVSDAAAHLS YEIMKYVPHN AEERQYLELI DRIMKTGLVK
260 270 280 290 300
EDRTGVGTIS LFGAQMFSLR DNQLPLLTTK RVFWRGVCEE LIWFLRGETN
310 320 330 340 350
AHVLADKDIH IWDGNGSREF LDSRGLTENK EMDLGPVYGF QWRHFGADYK
360 370 380 390 400
GFDANYDEGV DQIKTIVETL KTNDRRLLVT AWNPCALHKM AVRPCHLLGQ
410 420 430 440 450
FYVNTQTKEL SCMLYQRCCD MGLGVPFNIA SYALLTILIA KATGLRPGEL
460 470 480 490 500
VHTLGTAHVY SNHVEALKEQ LQRVPVAFPV LVFKKEREFL EDYESTDMEV
510
VDYVPYPPIK MEMAV
Length:515
Mass (Da):58,294
Last modified:November 1, 1996 - v1
Checksum:i8327DAB231535921
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M22852 Genomic DNA. Translation: AAA30318.1.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M22852 Genomic DNA. Translation: AAA30318.1.

3D structure databases

ProteinModelPortaliQ23695.
ModBaseiSearch...
MobiDBiSearch...

Proteomic databases

PRIDEiQ23695.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Enzyme and pathway databases

UniPathwayiUPA00077; UER00158.

Family and domain databases

CDDicd00209. DHFR. 1 hit.
cd00351. TS_Pyrimidine_HMase. 1 hit.
Gene3Di3.30.572.10. 1 hit.
3.40.430.10. 1 hit.
HAMAPiMF_00008. Thymidy_synth_bact. 1 hit.
InterProiIPR024072. DHFR-like_dom.
IPR001796. DHFR_dom.
IPR023451. Thymidate_synth/dCMP_Mease.
IPR000398. Thymidylate_synthase.
IPR020940. Thymidylate_synthase_AS.
[Graphical view]
PfamiPF00186. DHFR_1. 1 hit.
PF00303. Thymidylat_synt. 1 hit.
[Graphical view]
PRINTSiPR00108. THYMDSNTHASE.
SUPFAMiSSF53597. SSF53597. 1 hit.
SSF55831. SSF55831. 1 hit.
TIGRFAMsiTIGR03284. thym_sym. 1 hit.
PROSITEiPS51330. DHFR_2. 1 hit.
PS00091. THYMIDYLATE_SYNTHASE. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiDRTS_CRIFA
AccessioniPrimary (citable) accession number: Q23695
Entry historyi
Integrated into UniProtKB/Swiss-Prot: November 1, 1997
Last sequence update: November 1, 1996
Last modified: November 30, 2016
This is version 78 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Keywords - Technical termi

Multifunctional enzyme

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.