A0A0L6Y0U6 · A0A0L6Y0U6_ECOLX

  • Protein
    Bifunctional polymyxin resistance protein ArnA
  • Gene
    arnA
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    4/5

Function

function

Bifunctional enzyme that catalyzes the oxidative decarboxylation of UDP-glucuronic acid (UDP-GlcUA) to UDP-4-keto-arabinose (UDP-Ara4O) and the addition of a formyl group to UDP-4-amino-4-deoxy-L-arabinose (UDP-L-Ara4N) to form UDP-L-4-formamido-arabinose (UDP-L-Ara4FN). The modified arabinose is attached to lipid A and is required for resistance to polymyxin and cationic antimicrobial peptides.

Caution

The sequence shown here is derived from an EMBL/GenBank/DDBJ whole genome shotgun (WGS) entry which is preliminary data.

Catalytic activity

Pathway

Bacterial outer membrane biogenesis; lipopolysaccharide biosynthesis.
Nucleotide-sugar biosynthesis; UDP-4-deoxy-4-formamido-beta-L-arabinose biosynthesis; UDP-4-deoxy-4-formamido-beta-L-arabinose from UDP-alpha-D-glucuronate: step 1/3.
Nucleotide-sugar biosynthesis; UDP-4-deoxy-4-formamido-beta-L-arabinose biosynthesis; UDP-4-deoxy-4-formamido-beta-L-arabinose from UDP-alpha-D-glucuronate: step 3/3.

Features

Showing features for binding site, site, active site.

Type
IDPosition(s)Description
Binding site86-88(6R)-10-formyltetrahydrofolate (UniProtKB | ChEBI)
Site102Transition state stabilizer
Active site104Proton donor; for formyltransferase activity
Binding site114(6R)-10-formyltetrahydrofolate (UniProtKB | ChEBI)
Binding site136-140(6R)-10-formyltetrahydrofolate (UniProtKB | ChEBI)
Site140Raises pKa of active site His
Binding site347NAD+ (UniProtKB | ChEBI)
Binding site368-369NAD+ (UniProtKB | ChEBI)
Binding site393UDP-alpha-D-glucuronate (UniProtKB | ChEBI)
Binding site398UDP-alpha-D-glucuronate (UniProtKB | ChEBI)
Binding site432-433UDP-alpha-D-glucuronate (UniProtKB | ChEBI)
Active site434Proton acceptor; for decarboxylase activity
Binding site460UDP-alpha-D-glucuronate (UniProtKB | ChEBI)
Binding site492UDP-alpha-D-glucuronate (UniProtKB | ChEBI)
Binding site526-535UDP-alpha-D-glucuronate (UniProtKB | ChEBI)
Binding site613UDP-alpha-D-glucuronate (UniProtKB | ChEBI)
Active site619Proton donor; for decarboxylase activity

GO annotations

AspectTerm
Cellular Componentmembrane
Molecular Functioncarboxy-lyase activity
Molecular FunctionUDP-4-amino-4-deoxy-L-arabinose formyltransferase activity
Molecular FunctionUDP-glucuronic acid dehydrogenase activity
Biological Processlipid A biosynthetic process
Biological Processlipopolysaccharide biosynthetic process
Biological Processresponse to antibiotic

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Bifunctional polymyxin resistance protein ArnA

Including 2 domains:

  • Recommended name
    UDP-4-amino-4-deoxy-L-arabinose formyltransferase
  • EC number
  • Alternative names
    • ArnAFT
    • UDP-L-Ara4N formyltransferase
  • Recommended name
    UDP-glucuronic acid oxidase, UDP-4-keto-hexauronic acid decarboxylating
  • EC number
  • Alternative names
    • ArnADH
    • UDP-GlcUA decarboxylase
    • UDP-glucuronic acid dehydrogenase

Gene names

    • Name
      arnA
    • ORF names
      BTB68_002278
      , F9461_16960
      , FGAF848_32530

Organism names

  • Taxonomic identifier
  • Organism
  • Strains
    • CVM N19EC0189
    • PNUSAE005278
    • F848
  • Taxonomic lineage
    Bacteria > Pseudomonadota > Gammaproteobacteria > Enterobacterales > Enterobacteriaceae > Escherichia

Accessions

  • Primary accession
    A0A0L6Y0U6

Proteomes

Subcellular Location

Interaction

Subunit

Homohexamer, formed by a dimer of trimers.

Family & Domains

Features

Showing features for region, domain.

Type
IDPosition(s)Description
Region1-304Formyltransferase ArnAFT
Domain47-176Formyl transferase N-terminal
Domain202-294Formyl transferase C-terminal
Region314-660Dehydrogenase ArnADH
Domain318-566NAD-dependent epimerase/dehydratase

Sequence similarities

In the C-terminal section; belongs to the NAD(P)-dependent epimerase/dehydratase family. UDP-glucuronic acid decarboxylase subfamily.
In the N-terminal section; belongs to the Fmt family. UDP-L-Ara4N formyltransferase subfamily.

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    660
  • Mass (Da)
    74,202
  • Last updated
    2015-11-11 v1
  • MD5 Checksum
    C63ADC009500333B2C806422B0775D0F
MKTVVFAYHDMGCLGIEALLSAGYEISAIFTHTDNPGEKAFYGSVARLAAERGIPVYAPDNVNHPLWVERIAQLSPEVIFSFYYRHLICDEILQLAPAGAFNLHGSLLPKYRGRAPLNWVLVNGETETGVTLHRMVKRADAGAIVAQLRIAIAPDDIAITLHHKLCHAARQLLEQTLPAIKHGNILEIAQRENEATCFGRRTPEDSFLEWHKPAAVLHNMVRAVADPWPGAFSYAGNQKFTVWSSRVHPHTSAAQPGSVISVAPLLIACGDGALEIVTGQAGDGITMQGSQLAQTLGLVQGSRLNSQPACTARRRTRVLILGVNGFIGNHLTERLLREDHYEVYGLDIGSDAISRFLNHPHFHFVEGDISIHSEWIEYHVKKCDVVLPLVAIATPIEYTRNPLRVFELDFEENLRIIRYCVKYRKRIIFPSTSEVYGMCSDKYFDEDHSNLIVGPVNKPRWIYSVSKQLLDRVIWAYGEKEGLQFTLFRPFNWMGPRLDNLNAARIGSSRAITQLILNLVEGSPIKLIDGGKQKRCFTDIRDGIEALYRIIENAGNRCDGEIINIGNPENEASIEELGEMLLASFEKHPLRHHFPPFAGFRVVESSSYYGKGYQDVEHRKPSIRNAHRCLDWEPKIDMQETIDETLDFFLRTVDLTDKPS

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
CAUZHL010000004
EMBL· GenBank· DDBJ
CAK1212597.1
EMBL· GenBank· DDBJ
Genomic DNA
AASRHK010000020
EMBL· GenBank· DDBJ
EFF8954334.1
EMBL· GenBank· DDBJ
Genomic DNA
AASVQO010000012
EMBL· GenBank· DDBJ
EFH3674887.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. Our staff consists of biologists and biochemists that are not trained to give medical advice.
This website requires cookies, and the limited processing of your personal data in order to function. By using the site you are agreeing to this as outlined in our Privacy Notice.
Help