Pseudomonas aeruginosa PAO1, PA0091 (vgrG1)

Cytoplasmic Membrane
Outer Membrane
View in JBrowse PseudoCyc / Metabolic Pathways

Gene Feature Overview

Strain Pseudomonas aeruginosa PAO1 (Stover et al., 2000)
Locus Tag
Synonym: vgrG1a
Replicon chromosome
Genomic location 110976 - 112907 (+ strand)
Transposon Mutants 3 transposon mutants in PAO1
Transposon Mutants in orthologs 10 transposon mutants in orthologs


RefSeq NP_248781.1
GI 15595289
Affymetrix PA0091_at
Entrez 879511
GenBank AAG03481.1
INSDC AAG03481.1
NCBI Locus Tag PA0091
protein_id(GenBank) gb|AAG03481.1|AE004447_14|gnl|PseudoCAP|PA0091
UniParc UPI00000C4F2C
UniProtKB Acc Q9I741
UniRef100 UniRef100_Q9I741
UniRef50 UniRef50_Q9I741
UniRef90 UniRef90_Q9I741


Feature Type CDS
Coding Frame 1
Product Name
Product Name Confidence: Class 1
Synonyms VgrG1a
Evidence for Translation
Identified using nanoflow high-pressure liquid chromatography (HPLC) in conjunction with microelectrospray ionization on LTQ XL mass spectrometer (PMID:24291602).
Charge (pH 7) -6.10
Kyte-Doolittle Hydrophobicity Value -0.542
Molecular Weight (kDa) 72.0
Isoelectric Point (pI) 6.37

Subcellular localization

Individual Mappings
Localization Confidence PMID
Cytoplasmic Class 3
Extracellular Class 1
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

PDB 3D Structures

Accession Header Accession Date Compound Source Resolution Method Percent Identity
6H3N TOXIN 07/19/18 Structure of VgrG1 in the Type VI secretion VgrG1-Tse6-EF-Tu complex embedded in lipid nanodiscs Pseudomonas aeruginosa PAO1 3.25 ELECTRON MICROSCOPY 100.0
4MTK TOXIN 09/19/13 Crystal structure of PA0091 VgrG1, the central spike of the Type VI Secretion System Pseudomonas aeruginosa 3.322 X-RAY DIFFRACTION 100.0
4UHV STRUCTURAL PROTEIN 03/25/15 The structure of VgrG1, the needle tip of the bacterial Type VI Secretion System PSEUDOMONAS AERUGINOSA 2 X-RAY DIFFRACTION 100.0
6H3L TOXIN 07/19/18 Structure of VgrG1 in the Type VI secretion pre-firing VgrG1-Tse6-EagT6-EF-Tu-Tsi6 complex Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) 4.2 ELECTRON MICROSCOPY 100.0

Virulence Evidence

Source 1
Database VFDB : VF0334
Category Hcp secretion island-1 encoded type VI secretion system (H-T6SS)
Evidence ECO:0000305
curator inference used in manual assertion
Host Organism
Reference 16763151

Pathogen Association Analysis

Found in both pathogen and nonpathogenic strains
Hits to this gene were found in 156 genera

Orthologs/Comparative Genomics

Pseudomonas Ortholog Database View orthologs at Pseudomonas Ortholog Database
Pseudomonas Ortholog Group POG000090 (3342 members)
Putative Inparalogs None Found


STRING database Search for predicted protein-protein interactions using:
Search term: PA0091
Search term: vgrG1
Search term: VgrG1

Human Homologs


Rhs elements comprise three subfamilies which diverged prior to acquisition by Escherichia coli.
Wang YD, Zhao S, Hill CW
J Bacteriol 1998 Aug;180(16):4102-10
PubMed ID: 9696756
A virulence locus of Pseudomonas aeruginosa encodes a protein secretion apparatus.
Mougous JD, Cuff ME, Raunser S, Shen A, Zhou M, Gifford CA, Goodman AL, Joachimiak G, Ordoñez CL, Lory S, Walz T, Joachimiak A, Mekalanos JJ
Science 2006 Jun 9;312(5779):1526-30
PubMed ID: 16763151
A type VI secretion system of Pseudomonas aeruginosa targets a toxin to bacteria.
Hood RD, Singh P, Hsu F, Güvener T, Carl MA, Trinidad RR, Silverman JM, Ohlson BB, Hicks KG, Plemel RL, Li M, Schwarz S, Wang WY, Merz AJ, Goodlett DR, Mougous JD
Cell Host Microbe 2010 Jan 21;7(1):25-37
PubMed ID: 20114026
Type VI secretion system in Pseudomonas aeruginosa: secretion and multimerization of VgrG proteins.
Hachani A, Lossi NS, Hamilton A, Jones C, Bleves S, Albesa-Jové D, Filloux A
J Biol Chem 2011 Apr 8;286(14):12317-27
PubMed ID: 21325275
An interbacterial NAD(P)(+) glycohydrolase toxin requires elongation factor Tu for delivery to target cells.
Whitney JC, Quentin D, Sawai S, LeRoux M, Harding BN, Ledvina HE, Tran BQ, Robinson H, Goo YA, Goodlett DR, Raunser S, Mougous JD
Cell 2015 Oct 22;163(3):607-19
PubMed ID: 26456113