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Protein

4-hydroxythreonine-4-phosphate dehydrogenase

Gene

pdxA

Organism
Enterobacter agglomerans (Erwinia herbicola) (Pantoea agglomerans)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Catalyzes the NAD(P)-dependent oxidation of 4-(phosphohydroxy)-L-threonine (HTP) into 2-amino-3-oxo-4-(phosphohydroxy)butyric acid which spontaneously decarboxylates to form 3-amino-2-oxopropyl phosphate (AHAP).By similarity

Miscellaneous

The active site is located at the dimer interface.By similarity

Catalytic activityi

4-phosphonooxy-L-threonine + NAD+ = 3-amino-2-oxopropyl phosphate + CO2 + NADH.

Cofactori

Zn2+By similarity, Mg2+By similarity, Co2+By similarityNote: Binds 1 divalent metal cation per subunit. Can use ions such as Zn2+, Mg2+ or Co2+.By similarity

Pathwayi: pyridoxine 5'-phosphate biosynthesis

This protein is involved in step 4 of the subpathway that synthesizes pyridoxine 5'-phosphate from D-erythrose 4-phosphate.
Proteins known to be involved in the 5 steps of the subpathway in this organism are:
  1. D-erythrose-4-phosphate dehydrogenase (epd), D-erythrose-4-phosphate dehydrogenase (gapA)
  2. Erythronate-4-phosphate dehydrogenase (pdxB), Erythronate-4-phosphate dehydrogenase (pdxB)
  3. Phosphoserine aminotransferase (serC), Phosphoserine aminotransferase (serC)
  4. 4-hydroxythreonine-4-phosphate dehydrogenase (pdxA), 4-hydroxythreonine-4-phosphate dehydrogenase (pdxA), 4-hydroxythreonine-4-phosphate dehydrogenase (pdxA), 4-hydroxythreonine-4-phosphate dehydrogenase (pdxA), 4-hydroxythreonine-4-phosphate dehydrogenase (pdxA), 4-hydroxythreonine-4-phosphate dehydrogenase (pdxA)
  5. Pyridoxine 5'-phosphate synthase (pdxJ), Pyridoxine 5'-phosphate synthase (pdxJ)
This subpathway is part of the pathway pyridoxine 5'-phosphate 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 pyridoxine 5'-phosphate from D-erythrose 4-phosphate, the pathway pyridoxine 5'-phosphate biosynthesis and in Cofactor biosynthesis.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi44Divalent metal cation; shared with dimeric partnerBy similarity1
Binding sitei52SubstrateBy similarity1
Binding sitei61SubstrateBy similarity1
Binding sitei70SubstrateBy similarity1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processPyridoxine biosynthesis
LigandCobalt, Magnesium, Metal-binding, NAD, NADP, Zinc

Enzyme and pathway databases

UniPathwayiUPA00244; UER00312.

Names & Taxonomyi

Protein namesi
Recommended name:
4-hydroxythreonine-4-phosphate dehydrogenase (EC:1.1.1.262)
Alternative name(s):
4-(phosphohydroxy)-L-threonine dehydrogenase
Gene namesi
Name:pdxA
OrganismiEnterobacter agglomerans (Erwinia herbicola) (Pantoea agglomerans)
Taxonomic identifieri549 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesErwiniaceaePantoeaPantoea agglomerans group

Subcellular locationi

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_0000188807‹1 – 1054-hydroxythreonine-4-phosphate dehydrogenaseAdd BLAST›105

Interactioni

Subunit structurei

Homodimer.By similarity

Structurei

3D structure databases

ProteinModelPortaliQ47824.
SMRiQ47824.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the PdxA family.Curated

Family and domain databases

InterProiView protein in InterPro
IPR005255. PdxA.
PANTHERiPTHR30004. PTHR30004. 1 hit.
PfamiView protein in Pfam
PF04166. PdxA. 1 hit.

Sequencei

Sequence statusi: Fragment.

Q47824-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
IRILTPAVEA MKAQGMDVYG PCPPDTVFMQ CNEDMYDIVV AMYHDQGHIP
60 70 80 90 100
LKLLGFYDGV NITAGLPFLR TSADHGTAFN IAWTGKANPE SMAISIDMAM

KITRE
Length:105
Mass (Da):11,551
Last modified:November 1, 1996 - v1
Checksum:i749F66EE8A2A00EB
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Non-terminal residuei11

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U25347 Genomic DNA. Translation: AAA66389.1.

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.

Entry informationi

Entry nameiPDXA_ENTAG
AccessioniPrimary (citable) accession number: Q47824
Entry historyiIntegrated into UniProtKB/Swiss-Prot: November 1, 1997
Last sequence update: November 1, 1996
Last modified: May 10, 2017
This is version 79 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Documents

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