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tisB | Toxic membrane persister formation peptide, LexA-regulated; Toxic component of a type I toxin-antitoxin (TA) system (Probable). Overexpression causes cessation of growth, induces stress-response, a number of membrane protein genes, and leads to cell death. Inhibits ATP synthesis, ATP levels drop drastically quickly after induction. Part of the programmed response to DNA damage; damage leads to increased accumulation of the protein which slows or stops bacterial growth, probably allowing DNA repair before cells continue to grow. (29 aa) | ||||
htrE | Putative outer membrane usher protein; Part of the yadCKLM-htrE-yadVN fimbrial operon. Could contribute to adhesion to various surfaces in specific environmental niches. Probably involved in the export and assembly of fimbrial subunits across the outer membrane. (865 aa) | ||||
clcA | H(+)/Cl(-) exchange transporter; Proton-coupled chloride transporter. Functions as antiport system and exchanges two chloride ions for 1 proton. Probably acts as an electrical shunt for an outwardly-directed proton pump that is linked to amino acid decarboxylation, as part of the extreme acid resistance (XAR) response. (473 aa) | ||||
phoE | Outer membrane porin PhoE; Uptake of inorganic phosphate, phosphorylated compounds, and some other negatively charged solutes; Belongs to the Gram-negative porin family. (351 aa) | ||||
tsx | Nucleoside channel, receptor of phage T6 and colicin K; Functions as substrate-specific channel for nucleosides and deoxynucleosides. Has a greater affinity for deoxynucleosides than for nucleosides, and does not transport free bases. In addition, constitutes the receptor for colicin K and phage T6. Belongs to the nucleoside-specific channel-forming outer membrane porin (Tsx) (TC 1.B.10) family. (294 aa) | ||||
amtB | Ammonium transporter; Involved in the uptake of ammonia; Belongs to the ammonia transporter channel (TC 1.A.11.2) family. (428 aa) | ||||
mscK | Mechanosensitive channel protein, intermediate conductance, K+ regulated; Mechanosensitive channel that opens in response to membrane tension and specific ionic conditions. Requires high concentrations of external K(+), NH(4)(+), Rb(+) or Cs(+) to gate. May participate in the regulation of osmotic pressure changes within the cell, although it does not appear to have a major role in osmolarity regulation. Forms an ion channel of 1.0 nanosiemens conductance. The channel can remain active for between 30 seconds and over 3 minutes; it does not desensitize upon extended pressure. Its activi [...] (1120 aa) | ||||
sfmD | Putative outer membrane export usher protein; Part of the sfmACDHF fimbrial operon. Could contribute to adhesion to various surfaces in specific environmental niches. Increases adhesion to eukaryotic T24 bladder epithelial cells in the absence of fim genes. Probably involved in the export and assembly of fimbrial subunits across the outer membrane. (867 aa) | ||||
insH1-2 | DLP12 prophage; truncated outer membrane porin (pseudogene);IS, phage, Tn; Phage or Prophage Related; outer membrane porin protein; locus of qsr prophage. (338 aa) | ||||
cusC | Copper/silver efflux system, outer membrane component; Forms pores that allow passive diffusion of cations across the outer membrane. Part of a cation efflux system that mediates resistance to copper and silver. In pathogenic strains it allows the bacteria to invade brain microvascular endothelial cells (BMEC) thus allowing it to cross the blood-brain barrier and cause neonatal meningitis. (457 aa) | ||||
ybdG | Mechanosensitive channel protein, miniconductance; Mechanosensitive channel of miniconductance that confers protection against mild hypoosmotic shock. Overexpression confers protection against severe shocks. (415 aa) | ||||
fepA | Ferrienterobactin outer membrane transporter; This protein is involved in the initial step of iron uptake by binding ferrienterobactin (Fe-ENT), an iron chelatin siderophore that allows E.coli to extract iron from the environment. FepA also acts as a receptor for colicins B and D. (746 aa) | ||||
flc | Fluoride efflux channel, dual topology membrane protein; Important for reducing fluoride concentration in the cell, thus reducing its toxicity. (127 aa) | ||||
chiP | Chitoporin, uptake of chitosugars; Involved in the uptake of chitosugars. (468 aa) | ||||
ybgQ | Putative outer membrane protein; Could be involved in the export and assembly of the putative YbgD fimbrial subunit across the outer membrane; Belongs to the fimbrial export usher family. (815 aa) | ||||
ybiO | Mechanosensitive channel protein, intermediate conductance; Mechanosensitive channel that protects cells against hypoosmotic stress when highly overexpressed. Belongs to the MscS (TC 1.A.23) family. (741 aa) | ||||
glnH | Glutamine transporter subunit; Involved in a glutamine-transport system GlnHPQ. (248 aa) | ||||
artJ | Arginine ABC transporter periplasmic binding protein; Part of the ABC transporter complex ArtPIQMJ involved in arginine transport. Binds L-arginine with high affinity. (243 aa) | ||||
artI | Arginine transporter subunit; Part of the ABC transporter complex ArtPIQMJ involved in arginine transport. (243 aa) | ||||
aqpZ | Aquaporin Z; Channel that permits osmotically driven movement of water in both directions. It is involved in the osmoregulation and in the maintenance of cell turgor during volume expansion in rapidly growing cells. It mediates rapid entry or exit of water in response to abrupt changes in osmolarity. (231 aa) | ||||
ompF | Outer membrane porin 1a (Ia;b;F); Forms pores that allow passive diffusion of small molecules across the outer membrane. (Microbial infection) A mixed OmpC-OmpF heterotrimer is the outer membrane receptor for toxin CdiA-EC536; polymorphisms in extracellular loops 4 and 5 of OmpC confer susceptibility to CdiA- EC536-mediated toxicity; Belongs to the Gram-negative porin family. (362 aa) | ||||
elfC | Putative outer membrane fimbrial subunit export usher protein; Part of the elfADCG-ycbUVF fimbrial operon, which promotes adhesion of bacteria to different abiotic surfaces. Could be involved in the export and assembly of the ElfA fimbrial subunits across the outer membrane. (866 aa) | ||||
ompA | Outer membrane protein A (3a;II*;G;d); With TolR probably plays a role in maintaining the position of the peptidoglycan cell wall in the periplasm (Probable). Plays a role in resistance to environmental stress, and a role in outer membrane functionality and cell shape. Non-covalently binds peptidoglycan (Probable). Acts as a porin with low permeability that allows slow penetration of small solutes. A very abundant protein, there can be up to 210,000 OmpA molecules per cell. Reconstitution in unilamellar lipid vesicles shows only about 3% of the protein is in an open conformation, whic [...] (346 aa) | ||||
gfcE | Putative O-antigen capsule outer membrane auxillary protein export channel; May be involved in polysaccharide transport; Belongs to the BexD/CtrA/VexA family. (379 aa) | ||||
ompG | Outer membrane porin G; Forms channels functionally larger than those of classical porins. (301 aa) | ||||
trkG | Rac prophage; Low-affinity potassium transport system. Interacts with Trk system potassium uptake protein TrkA. Requires TrkE (sapD) for maximal transport activity, low activity is seen in its absence; no further stimulation is seen with SapF. Transport in the absence of SapD is dependent on a high membrane potential and a high cytoplasmic ATP concentration, suggesting this protein may be able to interact with other ATP-binding proteins. Can transport potassium and rubidium. (485 aa) | ||||
ompN | Outer membrane pore protein N, non-specific; Forms pores that allow passive diffusion of small molecules across the outer membrane (By similarity). Non-specific porin. (377 aa) | ||||
yddG | Aromatic amino acid exporter YddG; Probable efflux pump. Overexpression confers resistance to phenylalanine and increases export of phenylalanine, tyrosine and tryptophan; Belongs to the drug/metabolite transporter (DMT) superfamily. Aromatic amino acid/paraquat exporter (ArAA/P-E) (TC 2.A.7.17) family. (293 aa) | ||||
hipA | Serine/threonine-protein kinase toxin HipA; Toxic component of a type II toxin-antitoxin (TA) system, first identified by mutations that increase production of persister cells, a fraction of cells that are phenotypic variants not killed by antibiotics, which lead to multidrug tolerance. Persistence may be ultimately due to global remodeling of the persister cell's ribosomes. Phosphorylates Glu-tRNA-ligase (AC P04805, gltX, on 'Ser-239') in vivo. Phosphorylation of GltX prevents it from being charged, leading to an increase in uncharged tRNA(Glu). This induces amino acid starvation and [...] (440 aa) | ||||
yneE | Bestrophin family putative inner membrane protein. (304 aa) | ||||
ydfK | Cold shock protein YdfK; Cryptic prophage Qin/Kim. (77 aa) | ||||
clcB | H(+)/Cl(-) exchange transporter; Probably acts as an electrical shunt for an outwardly- directed proton pump that is linked to amino acid decarboxylation, as part of the extreme acid resistance (XAR) response. Belongs to the chloride channel (TC 2.A.49) family. ClcB subfamily. (418 aa) | ||||
uidC | Putative outer membrane porin for beta-glucuronides porin protein; Enhances the activity of the UidB (GusB) glucuronide transporter, on its own however it has no transport activity. Glucuronide transport does not occur in strain K12 due to a variant at position 100 of the UidB (GusB, AC P0CE44, AC P0CE45) protein. (421 aa) | ||||
motB | Protein that enables flagellar motor rotation; MotA and MotB comprise the stator element of the flagellar motor complex. Required for the rotation of the flagellar motor. Probably a linker that fastens the torque-generating machinery to the cell wall. Overexpression of this protein with MotA improves motility in a pdeH disruption, (a c-di-GMP phosphodiesterase) suggesting there is an interaction (direct or indirect) between the c-di-GMP-binding flagellar brake protein YcgR and the flagellar stator. (308 aa) | ||||
motA | Proton conductor component of flagella motor; MotA and MotB comprise the stator element of the flagellar motor complex. Required for rotation of the flagellar motor. Probable transmembrane proton channel. Overexpression of MotA, with or without MotB, restores motility in a pdeH disruption, (a c-di-GMP phosphodiesterase) suggesting there is an interaction (direct or indirect) between the c-di-GMP-binding flagellar brake protein YcgR and the flagellar stator. (295 aa) | ||||
fliY | Cystine transporter subunit; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Binds cystine ; Belongs to the bacterial solute-binding protein 3 family. (266 aa) | ||||
fliI | Flagellum-specific ATP synthase; Probable catalytic subunit of a protein translocase for flagellum-specific export, or a proton translocase involved in local circuits at the flagellum. May be involved in a specialized protein export pathway that proceeds without signal peptide cleavage; Belongs to the ATPase alpha/beta chains family. (457 aa) | ||||
hchA | Protein/nucleic acid deglycase 1; Protein and nucleotide deglycase that catalyzes the deglycation of the Maillard adducts formed between amino groups of proteins or nucleotides and reactive carbonyl groups of glyoxals. Thus, functions as a protein deglycase that repairs methylglyoxal- and glyoxal-glycated proteins, and releases repaired proteins and lactate or glycolate, respectively. Deglycates cysteine, arginine and lysine residues in proteins, and thus reactivates these proteins by reversing glycation by glyoxals. Is able to repair glycated serum albumin, aspartate aminotransferase, [...] (283 aa) | ||||
wza | Colanic acid export protein; Probably involved in the export of the extracellular polysaccharide colanic acid from the cell to medium. (379 aa) | ||||
yehB | Putative outer membrane protein; Part of the yehABCD fimbrial operon. Could contribute to adhesion to various surfaces in specific environmental niches. Probably involved in the export and assembly of fimbrial subunits across the outer membrane. (826 aa) | ||||
ompC | Outer membrane porin protein C; Forms pores that allow passive diffusion of small molecules across the outer membrane. (Microbial infection) A mixed OmpC-OmpF heterotrimer is the outer membrane receptor for toxin CdiA-EC536; polymorphisms in extracellular loops 4 and 5 of OmpC confer susceptibility to CdiA- EC536-mediated toxicity; Belongs to the Gram-negative porin family. (367 aa) | ||||
yfcV | Uncharacterized fimbrial-like protein YfcV; Part of the yfcOPQRSUV fimbrial operon. Could contribute to adhesion to various surfaces in specific environmental niches. Increases adhesion to eukaryotic T24 bladder epithelial cells in the absence of fim genes. (187 aa) | ||||
fadL | Long-chain fatty acid outer membrane transporter; Involved in translocation of long-chain fatty acids across the outer membrane. It is a receptor for the bacteriophage T2. FadL may form a specific channel; Belongs to the OmpP1/FadL family. (446 aa) | ||||
yfeO | Putative ion channel protein. (418 aa) | ||||
mscS | Mechanosensitive channel protein, small conductance; Mechanosensitive channel that participates in the regulation of osmotic pressure changes within the cell, opening in response to stretch forces in the membrane lipid bilayer, without the need for other proteins. Contributes to normal resistance to hypoosmotic shock. Forms an ion channel of 1.0 nanosiemens conductance with a slight preference for anions. The channel is sensitive to voltage; as the membrane is depolarized, less tension is required to open the channel and vice versa. The channel is characterized by short bursts of activ [...] (286 aa) | ||||
tolC | Transport channel; Outer membrane channel, which is required for the function of several efflux systems such as AcrAB-TolC, AcrEF-TolC, EmrAB-TolC and MacAB-TolC. These systems are involved in export of antibiotics and other toxic compounds from the cell. TolC is also involved in import of colicin E1 into the cells. (493 aa) | ||||
insC1-5 | Pseudogene; fimbrial export usher family;putative membrane; Not classified; putative membrane protein. (121 aa) | ||||
yraJ | Putative outer membrane protein; Part of the yraHIJK fimbrial operon. Could contribute to adhesion to various surfaces in specific environmental niches. Increases adhesion to eukaryotic T24 bladder epithelial cells in the absence of fim operon. Probably involved in the export and assembly of fimbrial subunits across the outer membrane. (838 aa) | ||||
yrbG | Putative calcium/sodium:proton antiporter; Protein involved in calcium:sodium antiporter activity. (325 aa) | ||||
yhcD | Putative outer membrane fimbrial subunit usher protein; Involved in the export and assembly of a fimbrial subunit across the outer membrane; Belongs to the fimbrial export usher family. (793 aa) | ||||
mscL | Mechanosensitive channel protein, high conductance; Mechanosensitive channel that opens in response to stretch forces in the membrane lipid bilayer. Forms a nonselective ion channel with a conductance of about 4 nanosiemens. Participates in the regulation of osmotic pressure changes within the cell. Opens at a pressure just below that which would cause cell disruption and death. The force required to trigger channel opening depends on the membrane lipids composition. (136 aa) | ||||
bglH | Carbohydrate-specific outer membrane porin, cryptic; Part of a cryptic operon that is poorly expressed in vivo. May be an ancestral sugar porin with a broad carbohydrate specificity; it binds aromatic beta-D-glucosides such as arbutin and salicin, but with low affinity compared to the binding of maltooligosaccharides to the LamB porin. (538 aa) | ||||
atpC | F1 sector of membrane-bound ATP synthase, epsilon subunit; Produces ATP from ADP in the presence of a proton gradient across the membrane; Belongs to the ATPase epsilon chain family. (139 aa) | ||||
atpD | F1 sector of membrane-bound ATP synthase, beta subunit; Produces ATP from ADP in the presence of a proton gradient across the membrane. The catalytic sites are hosted primarily by the beta subunits. (460 aa) | ||||
atpG | F1 sector of membrane-bound ATP synthase, gamma subunit; Produces ATP from ADP in the presence of a proton gradient across the membrane. The gamma chain is believed to be important in regulating ATPase activity and the flow of protons through the CF(0) complex. (287 aa) | ||||
atpA | F1 sector of membrane-bound ATP synthase, alpha subunit; Produces ATP from ADP in the presence of a proton gradient across the membrane. The alpha chain is a regulatory subunit. (513 aa) | ||||
atpH | F1 sector of membrane-bound ATP synthase, delta subunit; F(1)F(0) ATP synthase produces ATP from ADP in the presence of a proton or sodium gradient. F-type ATPases consist of two structural domains, F(1) containing the extramembraneous catalytic core and F(0) containing the membrane proton channel, linked together by a central stalk and a peripheral stalk. During catalysis, ATP synthesis in the catalytic domain of F(1) is coupled via a rotary mechanism of the central stalk subunits to proton translocation; Belongs to the ATPase delta chain family. (177 aa) | ||||
atpF | F0 sector of membrane-bound ATP synthase, subunit b; F(1)F(0) ATP synthase produces ATP from ADP in the presence of a proton or sodium gradient. F-type ATPases consist of two structural domains, F(1) containing the extramembraneous catalytic core and F(0) containing the membrane proton channel, linked together by a central stalk and a peripheral stalk. During catalysis, ATP synthesis in the catalytic domain of F(1) is coupled via a rotary mechanism of the central stalk subunits to proton translocation. (156 aa) | ||||
atpE | F0 sector of membrane-bound ATP synthase, subunit c; F(1)F(0) ATP synthase produces ATP from ADP in the presence of a proton or sodium gradient. F-type ATPases consist of two structural domains, F(1) containing the extramembraneous catalytic core and F(0) containing the membrane proton channel, linked together by a central stalk and a peripheral stalk. During catalysis, ATP synthesis in the catalytic domain of F(1) is coupled via a rotary mechanism of the central stalk subunits to proton translocation. (79 aa) | ||||
atpB | F0 sector of membrane-bound ATP synthase, subunit a; Key component of the proton channel; it plays a direct role in the translocation of protons across the membrane. (271 aa) | ||||
trkH | Potassium transporter; Low-affinity potassium transport system. Interacts with Trk system potassium uptake protein TrkA. Requires TrkE (sapD) for transport activity, 20% more uptake is seen with both SapD and SapF. Transport in the absence of SapD and SapF is dependent on a high membrane potential and a high cytoplasmic ATP concentration, suggesting this protein may be able to interact with other ATP-binding proteins. Can transport potassium and rubidium. (483 aa) | ||||
ompL | Outer membrane porin L; Outer membrane channel protein that allows an efficient diffusion of low-molecular-weight solutes such as small sugars and tetraglycine. However, the specific substrate recognized by the OmpL channel is unknown; Belongs to the oligogalacturonate-specific porin KdgM (TC 1.B.35) family. OmpL subfamily. (230 aa) | ||||
glpF | Glycerol facilitator; Transporter of glycerol across the cytoplasmic membrane, with limited permeability to water and small uncharged compounds such as polyols; Belongs to the MIP/aquaporin (TC 1.A.8) family. (281 aa) | ||||
btuB | Vitamin B12/cobalamin outer membrane transporter; Involved in the active translocation of vitamin B12 (cyanocobalamin) across the outer membrane to the periplasmic space. It derives its energy for transport by interacting with the trans- periplasmic membrane protein TonB. Is also a receptor for bacteriophages BF23 and C1, and for A and E colicins. (614 aa) | ||||
lamB | Maltose outer membrane porin (maltoporin); Involved in the transport of maltose and maltodextrins, indispensable for translocation of dextrins containing more than three glucosyl moieties. A hydrophobic path ('greasy slide') of aromatic residues serves to guide and select the sugars for transport through the channel. Also acts as a receptor for several bacteriophages including lambda. (446 aa) | ||||
nanC | N-acetylnuraminic acid outer membrane channel protein; Outer membrane channel protein allowing the entry of N- acetylneuraminic acid (Neu5Ac, the most abundant sialic acid on host cell surfaces) into the bacteria (Probable). NanC proteins form high- conductance channels which are open at low membrane potentials and which have a weak anion selectivity; Belongs to the oligogalacturonate-specific porin KdgM (TC 1.B.35) family. NanC subfamily. (238 aa) | ||||
fimD | Fimbrial usher outer membrane porin protein; Involved in the export and assembly of FimA fimbrial subunits across the outer membrane. (878 aa) |