NOVELTY - Transgenic Pseudomonas aeruginosa cell stably transformed with an isolated nucleic acid molecule that disrupts an endogenous nucleotide sequence including pilT (pilin gene) (SEQ ID NO: 1), pilA (pilin gene) (SEQ ID NO: 2), respiratory nitrate reductase precursor (nirS) (SEQ ID NO: 3), biofilm dispersion locus-A (bdlA) (SEQ ID NO: 4), lasI (encodes N-(3-oxododecanoyl)-L-homoserine lactone synthase) (SEQ ID NO: 5), lasR (SEQ ID NO: 6), filamenting temperature-sensitive mutant-Z (ftsZ) (SEQ ID NO: 7), or fliC (flagellin gene) (SEQ ID NO: 8), is new.    USE - The transgenic cell is useful: for converting the predetermined compound into a second compound; in microbial fuel cells; in filtration device (a liquid material filtration device or a gaseous material filtration device), a sensor for detecting a predetermined compound, or a bio-remedial system (all claimed); and in cleaning solutions and odor reduction systems.    ADVANTAGE - The transgenic cell: exhibits decreased expression of the endogenous nucleotide sequence; exhibits an altered electrogenic efficacy; has a reduced proliferative capability as compared to a non-transgenic cell; has a reduced virulence as compared to a non-transgenic cell; has reduced virulence is in mammals or plants; exhibits reduced motility as compared to a non-transgenic cell; exhibits altered pilus sticking as compared to a non-transgenic cell; exhibits altered twitching motility as compared to a non-transgenic cell; exhibits an increased current output/bacterial cell when the bacterial cell is a component of a microbial fuel cell; exhibits increased electron transfer to an anode, where the electron transfer is direct or indirect; has an improved function in microbial fuel cells, preferably to genetically modified bacteria with improved power (electron) generation; has improved contact with the anode; has improved biofilm formation; stably maintains the disrupted endogenous nucleotide sequence; has an altered iron-containing cytochrome concentration; and has an altered concentration of a channel forming protein.    DETAILED DESCRIPTION - Transgenic Pseudomonas aeruginosa cell stably transformed with an isolated nucleic acid molecule that disrupts an endogenous nucleotide sequence including pilT (pilin gene) (a fully defined sequence comprising 1035 nucleotides of SEQ ID NO: 1 as given in the specification), pilA (pilin gene) (a fully defined sequence comprising 450 nucleotides of SEQ ID NO: 2 as given in the specification), respiratory nitrate reductase precursor (nirS) (a fully defined sequence comprising 1707 nucleotides of SEQ ID NO: 3 as given in the specification), biofilm dispersion locus-A (bdlA) (a fully defined sequence comprising 1254 nucleotides of SEQ ID NO: 4 as given in the specification), lasI (encodes N-(3-oxododecanoyl)-L-homoserine lactone synthase) (a fully defined sequence comprising 606 nucleotides of SEQ ID NO: 5 as given in the specification), lasR (a fully defined sequence comprising 720 nucleotides of SEQ ID NO: 6 as given in the specification), filamenting temperature-sensitive mutant-Z (ftsZ, a fully defined sequence comprising 1185 nucleotides of SEQ ID NO: 7 as given in the specification), or fliC (flagellin gene) (a fully defined sequence comprising 1467 nucleotides of SEQ ID NO: 8 as given in the specification), is new. INDEPENDENT CLAIMS are also included for:    (1) a matrix comprising the transgenic cell;    (2) a biofilm comprising the transgenic bacterial cell, where the biofilm is 1-300 mu m in thickness;    (3) a filtration device comprising the transgenic bacterial cell;    (4) a filtration device comprising the biofilm containing the transgenic bacterial cell;    (5) a gaseous material filtration device, where the transgenic bacterial cell utilizes a greenhouse gas including carbon dioxide, nitrogen dioxide, nitrate, sulfur dioxide, methane, nitrous oxide or sulfur trioxide as a feedstock;    (6) a microbial fuel cell comprising the transgenic bacterial cell, an anode chamber and a cathode chamber;    (7) a microbial fuel cell comprising the biofilm containing the transgenic cell, the anode chamber and the cathode chamber;    (8) a sensor for detecting a predetermined compound, comprising the microbial fuel cell and an indicator indicating an abnormal level of the compound; and    (9) a bio-remedial system comprising the microbial fuel cell, where the transgenic bacterial cell utilizes a predetermined compound as a feedstock and the cell converts the predetermined compound into a second compound.