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ecce/ periplasmic proteins/ transport
Non-Binding Transport Proteins
Binding Proteins
Amino Acid Transport
Iron Transport
Peptide Transport
Sugar Transport
Sulfate or Sulfonate Transport
Others
Unknown function

Non-Binding Transport Protein Precursors

Vitamin B12 transport protein precursor (btuE )
functionnot essential for B12 transport, but auxiliary component of the transport system
interaction 
regulation 
MW20469 Da; 183 aa


Outer membrane lipoproteins carrier precursor (lolA )
functiontranslocates lipoproteins from IM to OM
interactionforms complex with lipoprotein
regulation 
MW22628 Da; 204 aa


TolB protein precursor (tolB )
functioninvolved in the TonB-independent uptake of a group of colicins
interaction 
regulation 
structure PDB
MW45955 Da; 430 aa


Binding-Proteins

Amino Acid Transport


Lysine-arginine-ornithine-binding protein precursor (argT)
function 
interactionArgT and HisJ interact with HisP
regulation 
MW27991 Da; 260 aa


Arginine-binding protein 1 precursor (artI )
functionbinds arginine
interaction 
regulation 
MW26929 Da; 243 aa


Arginine-binding protein 2 precursor (artJ )
functionbinds arginine
interaction 
regulation 
MW26829 Da; 243 aa


FliY protein precursor (fliY )
functionCystin binding protein
interaction 
regulationsulfate starvation induced
MW29039 Da; 266 aa


Glutamine-binding protein precursor (glnH )
functioninvolved in Gln -transport
interaction 
regulationinduction: lack of glutamin
structure PDB
MW27190 Da; 248 aa


Glutamate/aspartate periplasmic binding protein (gltI )
functionPart of the binding-protein-dependent transport system for glutamate and aspartate. Binds to both aspartate and glutamate
interaction 
regulation 
MW33420 Da; 302 aa


Histidine-binding protein HBP precursor (hisJ )
functioncomponent of high-affinity histidine permease
interaction 
regulation 
structure PDB
MW28483 Da; 260 aa


Leu/Ile/Val-binding protein LIV-BP precursor (livJ )
functioncomponent of leucine, isoleucine, valine (threonine) transport
interaction 
regulation 
structure PDB
MW39046 Da; 367 aa


Leucine-specific binding protein precursor (livK )
functioncomponent of the leucine-specific transport system
interaction 
regulation 
structure PDB
MW39306 Da; 369 aa


Glycine betaine-binding protein precursor (proX )
functionmember of multicomponent binding-protein-dependent transport system
interaction 
regulation 
structure PDB
MW36022 Da; 330 aa


Potential binding protein for amino acids (yhdW )
functionPutative amino-acid binding protein
interaction 
regulation 
MW37020 Da; 341 aa


Binding Proteins for Iron Transport

IronIII Dicitrate-binding protein precursor (fecB )
functionbinds citrate dependent IronIII
interaction 
regulation 
MW33120 Da; 300 aa


Ferrienterobactin-binding protein precursor (fepB )
functionbinds ferrienterobactin
interaction 
regulationinduction in part controlled by the amount of available iron
MW34283 Da; 318 aa


Ferrichrome-binding protein precursor (fhuD )
functioninvolved in high-affinity transport of ironIII -ferrichrome into the cell
interaction 
regulation 
structure PDB
MW32998 Da; 296 aa


Binding Proteins for Peptide Transport

Dipeptide transport protein precursor (dppA)
functiondipeptide-binding, required for chemotaxis
interaction 
regulation 
structure PDB
MW60293 Da; 535 aa


Murein peptide-binding protein precursor (mppA )
functionbinds L-alanyl-gamma-d-glutamyl-meso-diaminopimelate with high affinity
interaction 
regulation 
MW59900 Da; 537 aa


Oligopeptide-binding protein precursor (oppA )
functioncomponent of the oligopeptide permease, binds oligopeptides up to five amino acids with high affinity
interaction 
regulation 
MW60899 Da; 543 aa


Peptide transport protein SapA precursor (sapA )
functioninvolved in peptide intake transport system that plays a role in resistance to antimicrobial peptides
interaction 
regulation 
MW61564 Da; 547 aa


Potential binding protein (yejA )
function 
interaction 
regulation 
MW69669 Da; 604 aa


Potential binding protein (yddS )
function 
interaction 
regulation 
MW57641 Da; 516 aa


Potential binding protein (ygiS )
function 
interaction 
regulation 
MW60694 Da; 535 aa


Binding Proteins for Sugar Transport

D-allose-binding protein precursor (alsB )
functionPart of the binding-protein-dependent transport system alsbac for D-allose
interaction 
regulation 
structure PDB
MW32910 Da; 311 aa aa


L-Arabinose-binding protein precursor (araF )
functionhigh affinity to arabinose, can also bind D-galactose and D-fucose
interaction 
regulation 
structure PDB
MW35541 Da; 329 aa


D-galactose-binding protein precursor (mglB )
functioninvolved in the active transport of D-galactose and D-glucose
role in chemotaxis
interactionwith Trg chemoreceptor
regulation 
structure PDB
MW35712 Da; 332 aa


Maltose-binding protein MBP precursor (malE )
functionbinds maltoligosaccharides, involved inhigh affinity maltose-transport system, chemotaxis
interactionwith MalF and MalG
regulation 
structure PDB
MW43387 Da; 396 aa


D-ribose-binding protein precursor (rbsB )
functionhigh affinity D-ribose transport, primary chemoreceptor for chemotaxis
interaction 
regulation 
structure PDB
MW30950 Da; 296 aa


D-xylose-binding protein precursor (xylF )
functionbinds xylose with high affinity
interactionenergized by high-energy phosphate compounds
regulation 
MW35734 Da; 330 aa


Potential binding protein (ycjN )
function 
interaction 
regulation 
MW46808 Da; 430 aa


Binding Proteins for Sulfate or Sulfonate Transport

Thiosulfate-binding protein precursor (cysP )
functionbinding and transmembrane transport
interaction 
regulation 
MW37614 Da; 338 aa


Sulfate-binding protein precursor (sbp )
functionspecifically binds sulfate, involved in transport
interaction 
regulationsulfate starvation induced
MW36689 Da; 329 aa


Sulfonate-binding protein precursor SsuA (ssuA )
functionspecifically binds aliphatic sulfonates, involved in transport
interaction 
regulationsulfate starvation induced
MW34557 Da; 319 aa


Other Binding Proteins

BtuF protein precursor (btuF )
functionVitamin B12 binding protein
interaction 
regulation 
structure PDB
MW29367 Da; 266 aa


Polysialic acid transport protein KpsD precursor (KSD5) (kpsD )
functioninvolved in translocation of PSA across OM, binds polysaccharide
interaction 
regulation 
MW60484 Da; 558 aa


Molybdate-binding protein precursor (modA )
functionbinds molybdate with high specificity and affinity
interaction 
regulation 
structure PDB
MW27364 Da; 257 aa


Nickel-binding protein precursor (nikA )
functionprobably binds nickel
interaction 
regulation 
regulationinduction by phosphate deprivation, subject to positive control by PhoB and negative control by PhoR
structure PDB
MW58719 Da; 524 aa


Phosphonates-binding protein precursor (phnD )
functionalkylophosphonates binding protein
interaction 
regulation 
MW 37370 Da; 338 aa


Spermidine/putrescine-binding protein precursor SPBP (potD )
functionpolyamine-binding protein
interaction 
regulation 
 3d-structure
MW38867 Da; 348 aa


Putrescine-binding protein precursor (potF )
functionpolyamine-binding protein
interaction 
regulation 
MW40839 Da; 370 aa


Phosphate-binding protein precursor (pstS )
functionBP mediated phosphate transport
interaction 
regulationinduction by phosphate deprivation, subject to positive control by PhoB and negative control by PhoR
structure PDB
MW37024 Da; 346 aa


Thiamine-binding protein precursor (sfuA/tbpA/yabL )
functionThiamine binding
interaction 
regulation 
MW36163 Da; 327 aa


Taurine-binding protein precursor (tauA )
function 
interaction 
regulationsulfate starvation induced
MW34266 Da; 320 aa


Glycerol-3-phosphate-binding protein precursor (ugpB )
functionsn-glycerol-3-phosphate and glycerophosphoryl diester-binding
interactionUgpACE
regulation 
MW48452 Da; 438 aa


High-affinity zinc binding protein ZnuA (znuA )
function 
interaction 
regulation 
MW33777 Da; 310 aa



Binding Proteins of Unknown Function

Potential polyamine binding protein (ydcS )
function 
interaction 
regulation 
MW42295 Da; 381 aa


Potential choline binding protein (yehz )
function 
interaction 
regulation 
MW32609 Da; 305 aa


17.3 kD protein in murA-rpoN intergenic region precursor (yhbN )
function 
interaction 
regulation 
MW20127 Da; 185 aa


Putative binding protein YliB (yliB )
functionProbably part of the binding-protein-dependent transport system yliABCD
interaction 
cofactors 
regulation 
structure PDB
MW56470 Da; 512 aa


Potential binding protein (ynjB )
function 
interaction 
regulation 
MW42844 Da; 388 aa


Hypothetical ABC transporter binding protein YphF precursor (yphF )
functionprobably part of a binding-protein-dependent transport system YphDEF potentially transporting a monosaccharide
interaction 
regulation 
MW35058 Da; 327 aa


32.1 kD protein in ppa-fbp intergenic region precursor (ytfQ )
functionpotential monosaccharide transporter
interaction 
regulation 
MW34344 Da; 318 aa