Pseudomonas aeruginosa PAO1, PA3556 (arnT)

Cytoplasmic Membrane
Outer Membrane
View in JBrowse PseudoCyc / Metabolic Pathways

Gene Feature Overview

Strain Pseudomonas aeruginosa PAO1 (Stover et al., 2000)
Locus Tag
Synonym: pqaB
Replicon chromosome
Genomic location 3984890 - 3986539 (+ strand)
Transposon Mutants 9 transposon mutants in PAO1
Transposon Mutants in orthologs 2 transposon mutants in orthologs


RefSeq NP_252246.1
GI 15598752
Affymetrix PA3556_at
Entrez 879122
GenBank AAG06944.1
INSDC AAG06944.1
NCBI Locus Tag PA3556
protein_id(GenBank) gb|AAG06944.1|AE004776_7|gnl|PseudoCAP|PA3556
UniParc UPI00000C5A67
UniProtKB Acc Q9HY61
UniRef100 UniRef100_Q9HY61
UniRef50 UniRef50_Q4K884
UniRef90 UniRef90_Q9HY61


Feature Type CDS
Coding Frame 1
Product Name
inner membrane L-Ara4N transferase ArnT
Product Name Confidence: Class 2
Synonyms pmrK
Evidence for Translation
Identified using nanoflow high-pressure liquid chromatography (HPLC) in conjunction with microelectrospray ionization on LTQ XL mass spectrometer (PMID:24291602).
Detected using LC-MS/MS (61.73 kDa, PMID:21751344)
Charge (pH 7) 20.93
Kyte-Doolittle Hydrophobicity Value 0.399
Molecular Weight (kDa) 61.7
Isoelectric Point (pI) 10.10

Subcellular localization

Individual Mappings
Localization Confidence PMID
Outer Membrane Vesicle Class 1
Cytoplasmic Membrane Class 3
Additional evidence for subcellular localization

AlphaFold 2 Protein Structure Predictions

Protein structure predictions using a neural network model developed by DeepMind. If a UniProtKB accession is associated with this protein, a search link will be provided below.

Look for predicted 3D structure in AlphaFold DB: Search

Pathogen Association Analysis

Found in both pathogen and nonpathogenic strains
Hits to this gene were found in 243 genera

Orthologs/Comparative Genomics

Pseudomonas Ortholog Database View orthologs at Pseudomonas Ortholog Database
Pseudomonas Ortholog Group POG002110 (752 members)
Putative Inparalogs None Found


STRING database Search for predicted protein-protein interactions using:
Search term: PA3556
Search term: arnT

Human Homologs


An inner membrane enzyme in Salmonella and Escherichia coli that transfers 4-amino-4-deoxy-L-arabinose to lipid A: induction on polymyxin-resistant mutants and role of a novel lipid-linked donor.
Trent MS, Ribeiro AA, Lin S, Cotter RJ, Raetz CR
J Biol Chem 2001 Nov 16;276(46):43122-31
PubMed ID: 11535604
PmrA-PmrB-regulated genes necessary for 4-aminoarabinose lipid A modification and polymyxin resistance.
Gunn JS, Lim KB, Krueger J, Kim K, Guo L, Hackett M, Miller SI
Mol Microbiol 1998 Mar;27(6):1171-82
PubMed ID: 9570402
The Salmonella typhi melittin resistance gene pqaB affects intracellular growth in PMA-differentiated U937 cells, polymyxin B resistance and lipopolysaccharide.
Baker SJ, Gunn JS, Morona R
Microbiology (Reading) 1999 Feb;145 ( Pt 2):367-378
PubMed ID: 10075419
Proteomic analysis of outer membrane vesicles derived from Pseudomonas aeruginosa.
Choi DS, Kim DK, Choi SJ, Lee J, Choi JP, Rho S, Park SH, Kim YK, Hwang D, Gho YS
Proteomics 2011 Aug;11(16):3424-9
PubMed ID: 21751344