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gsiB gsiB gsiA gsiA fiu fiu tolB tolB tolA tolA tolR tolR dtpD dtpD cstA cstA fepA fepA ybaE ybaE sbmA sbmA sgrR sgrR tolQ tolQ dtpC dtpC dppA dppA dppB dppB dppC dppC dppD dppD dppF dppF dtpB dtpB nikD nikD nikC nikC nikB nikB nikA nikA yhdZ yhdZ yhdY yhdY yhdX yhdX ygiS ygiS exbB exbB exbD exbD yojI yojI bcr bcr yejF yejF yejE yejE yejB yejB yejA yejA cirA cirA yeeO yeeO mdtK mdtK dtpA dtpA ydeE ydeE ddpA ddpA ddpB ddpB ddpC ddpC ddpD ddpD ddpF ddpF abgT abgT mppA mppA sapA sapA sapB sapB sapC sapC sapD sapD sapF sapF tonB tonB oppF oppF oppD oppD oppC oppC oppB oppB oppA oppA ompF ompF cydD cydD cydC cydC gsiD gsiD gsiC gsiC
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query proteins and first shell of interactors
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second shell of interactors
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proteins of unknown 3D structure
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a 3D structure is known or predicted
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experimentally determined
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gsiBGlutathione ABC transporter periplasmic binding protein; Part of the ABC transporter complex GsiABCD involved in glutathione import. Binds glutathione ; Belongs to the bacterial solute-binding protein 5 family. (512 aa)
gsiAGlutathione ABC transporter ATPase; Part of the ABC transporter complex GsiABCD involved in glutathione import. Responsible for energy coupling to the transport system. (623 aa)
fiuCatecholate siderophore receptor; Involved in the active transport across the outer membrane of iron complexed with catecholate siderophores such as dihydroxybenzoylserine and dihydroxybenzoate. It derives its energy for transport by interacting with the trans-periplasmic membrane protein TonB. Can also transport catechol-substituted cephalosporins. Receptor for microcins M, H47 and E492. (760 aa)
tolBPeriplasmic protein; Part of the Tol-Pal system, which plays a role in outer membrane invagination during cell division and is important for maintaining outer membrane integrity. TolB occupies a key intermediary position in the Tol-Pal system because it communicates directly with both membrane-embedded components, Pal in the outer membrane and TolA in the inner membrane. Is also involved in the uptake of some colicins A. The Tol-Pal system is also required for polar localization of chemoreceptors clusters. (430 aa)
tolAMembrane anchored protein in TolA-TolQ-TolR complex; Part of the Tol-Pal system, which plays a role in outer membrane invagination during cell division and is important for maintaining outer membrane integrity. Is also involved in the uptake of group A colicins (colicins A, E1, E2, E3, and K) and in the uptake of filamentous phage DNA. The Tol-Pal system is also required for polar localization of chemoreceptors clusters. Belongs to the TolA family. (421 aa)
tolRMembrane spanning protein in TolA-TolQ-TolR complex; Part of the Tol-Pal system, which plays a role in outer membrane invagination during cell division and is important for maintaining outer membrane integrity. Required, with TolQ, for the proton motive force-dependent activation of TolA and for TolA-Pal interaction .The Tol-Pal system is also required for polar localization of chemoreceptors clusters (Probable). There are about 900 TolR molecules per cell. Modeling suggests that non-covalent binding of OmpA (from the outer membrane) and TolR (from the inner membrane) to peptidoglycan [...] (142 aa)
dtpDDipeptide and tripeptide permease D; Probable proton-dependent permease that transports dipeptides; Belongs to the PTR2/POT transporter (TC 2.A.17) family. DtpD subfamily. (493 aa)
cstACarbon starvation protein involved in peptide utilization; Involved in peptide utilization during carbon starvation. (701 aa)
fepAFerrienterobactin 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)
ybaEPutative ABC transporter periplasmic binding protein. (566 aa)
sbmAPeptide antibiotic transporter; Uptake of antimicrobial peptides. Required for the transport of microcin B17 (MccB17), microcin 25 (Mcc25) and proline-rich antimicrobial peptides into the cell. (406 aa)
sgrRTranscriptional DNA-binding transcriptional activator of sgrS sRNA; Activates the small RNA gene sgrS under glucose-phosphate stress conditions as well as yfdZ. Represses its own transcription under both stress and non-stress conditions; this repression likely provides one measure of control over sgrR at the level of synthesis. Might act as a sensor of the intracellular accumulation of phosphoglucose by binding these molecules in its C-terminal solute- binding domain. (551 aa)
tolQMembrane spanning protein in TolA-TolQ-TolR complex; Part of the Tol-Pal system, which plays a role in outer membrane invagination during cell division and is important for maintaining outer membrane integrity. Required, with TolR, for the proton motive force-dependent activation of TolA and for TolA-Pal interaction. Is also involved in the uptake of group A colicins (colicins A, E1, E2, E3, and K) and in the uptake of filamentous phage DNA. The Tol-Pal system is also required for polar localization of chemoreceptors clusters. Belongs to the ExbB/TolQ family. (230 aa)
dtpCDipeptide and tripeptide permease; Proton-dependent permease that transports di- and tripeptides. Shows significantly higher specificity towards dipeptides than tripeptides. Has a preference for dipeptides with a C-terminal Lys residue. Can bind Ala-Lys, Lys-Ala, Ala-Ala. Can also transport alanine and trialanine. Belongs to the PTR2/POT transporter (TC 2.A.17) family. (485 aa)
dppADipeptide/heme ABC transporter periplasmic binding protein; Dipeptide-binding protein of a transport system that can be subject to osmotic shock. DppA is also required for peptide chemotaxis; Belongs to the bacterial solute-binding protein 5 family. (535 aa)
dppBDipeptide/heme ABC transporter permease; Part of the binding-protein-dependent transport system for dipeptides; probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. OppBC subfamily. (339 aa)
dppCDipeptide/heme ABC transporter permease; Part of the binding-protein-dependent transport system for dipeptides; probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. OppBC subfamily. (300 aa)
dppDDipeptide/heme ABC transporter ATPas; Part of the binding-protein-dependent transport system for dipeptides. Probably responsible for energy coupling to the transport system. (327 aa)
dppFDipeptide/heme ABC transporter ATPas; Part of the binding-protein-dependent transport system for dipeptides. Probably responsible for energy coupling to the transport system; Belongs to the ABC transporter superfamily. (334 aa)
dtpBDipeptide and tripeptide permease B; Proton-dependent permease that transports di- and tripeptides. Has a clear preference for dipeptides and tripeptides composed of L-amino acids, and discriminates dipeptides on the basis of the position of charges within the substrate. Belongs to the PTR2/POT transporter (TC 2.A.17) family. DtpB subfamily. (489 aa)
nikDNickel ABC transporter ATPase; Part of the ABC transporter complex NikABCDE involved in nickel import. Responsible for energy coupling to the transport system. Belongs to the ABC transporter superfamily. Nickel importer (TC 3.A.1.5.3) family. (254 aa)
nikCNickel ABC transporter permease; Involved in a nickel transport system, probably translocates nickel through the bacterial inner membrane. (277 aa)
nikBNickel ABC transporter permease; Involved in a nickel transport system, probably translocates nickel through the bacterial inner membrane. (314 aa)
nikANickel/heme ABC transporter periplasmic binding protein; Involved in a nickel transport system, probably represents the nickel binder. (524 aa)
yhdZPutative amino acid ABC transporter ATPase; Probably part of a binding-protein-dependent transport system YdhWXYZ for an amino acid. Probably responsible for energy coupling to the transport system; Belongs to the ABC transporter superfamily. (252 aa)
yhdYPutative amino acid ABC transporter permease; Probably part of the binding-protein-dependent transport system YdhWXYZ for an amino acid; probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. HisMQ subfamily. (367 aa)
yhdXPutative amino-acid ABC transporter permease protein YhdX; Probably part of the binding-protein-dependent transport system YdhWXYZ for an amino acid; probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. HisMQ subfamily. (393 aa)
ygiSPutative ABC transporter permease; Probably part of a deoxycholate transport system. Its expression in the presence of deoxycholate in a ygiS deletion mutant increases intracellular deoxycholate levels and decreases cell growth; higher expression in the presence of deoxycholate inhibits cell growth completely. Bile acid detergents such as deoxycholate are important for host defense against bacterial growth in the gall bladder and duodenum. Belongs to the bacterial solute-binding protein 5 family. (535 aa)
exbBMembrane spanning protein in TonB-ExbB-ExbD complex; Involved in the TonB-dependent energy-dependent transport of various receptor-bound substrates. Protects ExbD from proteolytic degradation and functionally stabilizes TonB. (244 aa)
exbDMembrane spanning protein in TonB-ExbB-ExbD complex; Involved in the TonB-dependent energy-dependent transport of various receptor-bound substrates. (141 aa)
yojIMicrocin J25 efflux ABC transporter permease/ATPase; Mediates resistance to the antibacterial peptide microcin J25, when expressed from a multicopy vector. Functions as an efflux pump for microcin J25, with the help of the outer membrane channel TolC. (547 aa)
bcrBicyclomycin/cysteine/sulfonamide efflux transporter; Involved in sulfonamide (sulfathiazole) and bicyclomycin resistance. Probable membrane translocase. A transporter able to export peptides. When overexpressed, allows cells deleted for multiple peptidases (pepA, pepB, pepD and pepN) to grow in the presence of dipeptides Ala-Gln or Gly-Tyr which otherwise inhibit growth. Cells overexpressing this protein have decreased intracellular levels of Ala-Gln dipeptide, and in a system that produces the Ala-Gln dipeptide overproduction of this protein increases export of the dipeptide. Belongs [...] (396 aa)
yejFMicrocin C ABC transporter ATPase; Putative ATP-binding component of a transport system. (529 aa)
yejEMicrocin C ABC transporter permease; Probably part of a binding-protein-dependent transport system. Probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. OppBC subfamily. (341 aa)
yejBMicrocin C ABC transporter permease; Probably part of a binding-protein-dependent transport system. Probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. OppBC subfamily. (364 aa)
yejAPeriplasmic-binding component of ABC superfamily; To H.influenzae HbpA. (604 aa)
cirAColicin IA outer membrane receptor and translocator; Not yet known. Postulated to participate in iron transport. Outer membrane receptor for colicins IA and IB. (663 aa)
yeeOPutative multdrug exporter, MATE family; A transporter able to export peptides and flavins. When overexpressed allows cells deleted for multiple peptidases (pepA, pepB, pepD and pepN) to grow in the presence of dipeptides Ala-Gln or Gly-Tyr which otherwise inhibit growth. Cells overexpressing this protein have decreased intracellular levels of Ala-Gln dipeptide, and in a system that produces the Ala-Gln dipeptide, overproduction of this protein increases its export. When overexpressed increases secretion of FMN and FAD but not riboflavin; intracellular concentrations of FMN and ribofla [...] (495 aa)
mdtKMultidrug efflux system transporter; Multidrug efflux pump that probably functions as a Na(+)/drug antiporter. Confers resistance to many drugs such as fluoroquinolones (norfloxacin, ciprofloxacin, enoxacin) and tetraphenylphosphonium ion (TPP). Also to deoxycholate, doxorubicin, trimethoprim, chloramphenicol, fosfomycin, ethidium bromide and benzalkonium. Also able to export peptides; when overexpressed, allows cells deleted for multiple peptidases (pepA, pepB, pepD and pepN) to grow in the presence of dipeptides Ala-Gln or Gly-Tyr which otherwise inhibit growth. Cells overexpressing [...] (457 aa)
dtpADipeptide and tripeptide permease A; Proton-dependent permease that transports di- and tripeptides as well as structurally related peptidomimetics such as aminocephalosporins into the cell. Has a clear preference for dipeptides and tripeptides composed of L-amino acids, and discriminates dipeptides on the basis of the position of charges within the substrate; Belongs to the PTR2/POT transporter (TC 2.A.17) family. DtpA subfamily. (500 aa)
ydeEPutative transporter; A transporter able to export peptides. When overexpressed, allows cells deleted for multiple peptidases (pepA, pepB, pepD and pepN) to grow in the presence of dipeptides Ala-Gln or Gly-Tyr which otherwise inhibit growth. Cells overexpressing this protein have decreased intracellular levels of Ala-Gln dipeptide, and in a system that produces the Ala-Gln dipeptide overproduction of this protein increases export of the dipeptide. Belongs to the major facilitator superfamily. (395 aa)
ddpAD,D-dipeptide ABC transporter periplasmic binding protein; Part of the ABC transporter complex DdpABCDF, which is probably involved in D,D-dipeptide transport; Belongs to the bacterial solute-binding protein 5 family. (516 aa)
ddpBD,D-dipeptide ABC transporter permease; Part of the ABC transporter complex DdpABCDF, which is probably involved in D,D-dipeptide transport. Probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. OppBC subfamily. (340 aa)
ddpCD,D-dipeptide ABC transporter permease; Part of the ABC transporter complex DdpABCDF, which is probably involved in D,D-dipeptide transport. Probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. OppBC subfamily. (298 aa)
ddpDD,D-dipeptide ABC transporter ATPase; Part of the ABC transporter complex DdpABCDF, which is probably involved in D,D-dipeptide transport. Probably responsible for energy coupling to the transport system. (328 aa)
ddpFD,D-dipeptide ABC transporter ATPase; Part of the ABC transporter complex DdpABCDF, which is probably involved in D,D-dipeptide transport. Probably responsible for energy coupling to the transport system. (308 aa)
abgTP-aminobenzoyl-glutamate transporter; Essential for aminobenzoyl-glutamate utilization. It catalyzes the concentration-dependent uptake of p-aminobenzoyl- glutamate (PABA-GLU) into the cell and allows accumulation of PABA-GLU to a concentration enabling AbgAB to catalyze cleavage into p- aminobenzoate and glutamate. It seems also to increase the sensitivity to low levels of aminobenzoyl-glutamate. May actually serve physiologically as a transporter for some other molecule, perhaps a dipeptide, and that it transports p-aminobenzoyl-glutamate as a secondary activity. The physiological ro [...] (508 aa)
mppAMurein tripeptide (L-ala-gamma-D-glutamyl-meso-DAP) transporter subunit; Essential for the uptake of the murein peptide L-alanyl- gamma-D-glutamyl-meso-diaminopimelate. Also transports some alpha- linked peptides such as Pro-Phe-Lys with low affinity. The transport is effected by the oligopeptide permease system; Belongs to the bacterial solute-binding protein 5 family. (537 aa)
sapAAntimicrobial peptide transport ABC transporter periplasmic binding protein; Not part of a putrescine export system. Very similar to a S.typhimurium protein implicated in antimicrobial peptide resistance, but the SapBCDF operon in E.coli is implicated in putrescine export. (547 aa)
sapBAntimicrobial peptide transport ABC transporter permease; Part of a putrescine export transport system, does not play a role in resistance to antimicrobial peptides. (321 aa)
sapCAntimicrobial peptide transport ABC transporter permease; Part of a putrescine export transport system, does not play a role in resistance to antimicrobial peptides. (296 aa)
sapDAntimicrobial peptide ABC transporter ATPase; Part of a putrescine export transport system, does not play a role in resistance to antimicrobial peptides. Stimulates K(+)-uptake proteins TrkG and TrkH to import K(+), may act via ATP-binding rather than ATP hydrolysis. (330 aa)
sapFAntimicrobial peptide ABC transporter ATPase; Part of a putrescine export transport system, does not play a role in resistance to antimicrobial peptides. Does not stimulate K(+) uptake ability of TrkH on its own, but increases K(+) uptake by 20% in the presence of SapD; has no effect of TrkG ; Belongs to the ABC transporter superfamily. (268 aa)
tonBMembrane spanning protein in TonB-ExbB-ExbD transport complex; Interacts with outer membrane receptor proteins that carry out high-affinity binding and energy dependent uptake into the periplasmic space of specific substrates such as cobalamin, and various iron compounds (such as iron dicitrate, enterochelin, aerobactin, etc.). In the absence of TonB these receptors bind their substrates but do not carry out active transport. TonB also interacts with some colicins and is involved in the energy-dependent, irreversible steps of bacteriophages phi 80 and T1 infection. It could act to tran [...] (239 aa)
oppFOligopeptide ABC transporter ATPase; Part of the binding-protein-dependent transport system for oligopeptides. Probably responsible for energy coupling to the transport system; Belongs to the ABC transporter superfamily. (334 aa)
oppDOligopeptide ABC transporter ATPase; Part of the binding-protein-dependent transport system for oligopeptides. Probably responsible for energy coupling to the transport system. (337 aa)
oppCOligopeptide ABC transporter permease; Part of the binding-protein-dependent transport system for oligopeptides; probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. OppBC subfamily. (302 aa)
oppBOligopeptide ABC transporter permease; Part of the binding-protein-dependent transport system for oligopeptides; probably responsible for the translocation of the substrate across the membrane; Belongs to the binding-protein-dependent transport system permease family. OppBC subfamily. (306 aa)
oppAOligopeptide ABC transporter periplasmic binding protein; This protein is a component of the oligopeptide permease, a binding protein-dependent transport system, it binds peptides up to five amino acids long with high affinity; Belongs to the bacterial solute-binding protein 5 family. (543 aa)
ompFOuter 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)
cydDGlutathione/cysteine ABC transporter export permease/ATPase; Somehow involved in the cytochrome D branch of aerobic respiration. Seems to be a component of a transport system. (588 aa)
cydCGlutathione/cysteine ABC transporter export permease/ATPase; Somehow involved in the cytochrome D branch of aerobic respiration. Seems to be a component of a transport system; Belongs to the ABC transporter superfamily. Cysteine exporter (TC 3.A.1.129.1) family. (573 aa)
gsiDGlutathione ABC transporter permease; Part of the ABC transporter complex GsiABCD involved in glutathione import. Probably responsible for the translocation of the substrate across the membrane. (303 aa)
gsiCGlutathione ABC transporter permease; Part of the ABC transporter complex GsiABCD involved in glutathione import. Probably responsible for the translocation of the substrate across the membrane. (306 aa)
Your Current Organism:
Escherichia coli K12
NCBI taxonomy Id: 511145
Other names: E. coli str. K-12 substr. MG1655, Escherichia coli MG1655, Escherichia coli str. K-12 substr. MG1655, Escherichia coli str. K12 substr. MG1655, Escherichia coli str. MG1655, Escherichia coli strain MG1655
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