| UniProtKB AC (Name) | UniProtKB Section | Organism | Description | |
|---|---|---|---|---|
| P0AAJ8 (HYBA_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Hydrogenase-2 operon protein HybA; | |
| P27300 (LPXK_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Tetraacyldisaccharide 4'-kinase; Lipid A 4'-kinase; | |
| P45395 (KDSD_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Arabinose 5-phosphate isomerase KdsD; | |
| P67087 (RSMI_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Ribosomal RNA small subunit methyltransferase I; 16S rRNA 2'-O-ribose C1402 methyltransferase; rRNA (cytidine-2'-O-)-methyltransferase RsmI; | |
| P0AB74 (KBAY_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | D-tagatose-1,6-bisphosphate aldolase subunit KbaY; D-tagatose-bisphosphate aldolase class II; Ketose 1,6-bisphosphate aldolase class II; Tagatose-bisphosphate aldolase; | |
| Q46833 (YGHE_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Putative type II secretion system L-type protein YghE; Putative general secretion pathway L-type protein YghE; | |
| P37679 (SGBU_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Putative L-ribulose-5-phosphate 3-epimerase SgbU; L-xylulose-5-phosphate 3-epimerase; | |
| P0AGG2 (TESB_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Acyl-CoA thioesterase 2; Thioesterase II; | |
| P07364 (CHER_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Chemotaxis protein methyltransferase; | |
| P77173 (ZIPA_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Cell division protein ZipA; FtsZ interacting protein A; | |
| P37676 (YIAO_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | 2,3-diketo-L-gulonate-binding periplasmic protein YiaO; Extracytoplasmic solute receptor protein YiaO; | |
| P76316 (DCYD_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | D-cysteine desulfhydrase; | |
| P0AE26 (ARAH_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | L-arabinose transport system permease protein AraH; | |
| P75910 (YCDU_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Uncharacterized protein YcdU; | |
| P39382 (YJIK_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Uncharacterized protein YjiK; | |
| P42620 (YQJG_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Glutathionyl-hydroquinone reductase YqjG; | |
| P0C0K3 (SRKA_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Stress response kinase A; Serine/threonine protein kinase YihE; Serine/threonine-protein kinase SrkA; | |
| P0AAH4 (SAPD_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Putrescine export system ATP-binding protein SapD; | |
| P0ACQ0 (RBSR_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Ribose operon repressor; | |
| P13445 (RPOS_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | RNA polymerase sigma factor RpoS; Sigma S; Sigma-38; | |
| P00963 (ASNA_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Aspartate--ammonia ligase; Asparagine synthetase A; | |
| P0AFM2 (PROX_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Glycine betaine/proline betaine-binding periplasmic protein; GBBP; | |
| P37387 (XYLF_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | D-xylose-binding periplasmic protein; | |
| P0A993 (F16PA_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Fructose-1,6-bisphosphatase class 1; D-fructose-1,6-bisphosphate 1-phosphohydrolase class 1; | |
| P77733 (FOCB_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Formate channel FocB; Formate transporter FocB; | |
| P09378 (RHAR_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | HTH-type transcriptional activator RhaR; L-rhamnose operon transcriptional activator RhaR; | |
| P37671 (PLAR_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | HTH-type transcriptional repressor PlaR; Regulator of plant utilization; YiaKLMNOPQRS operon repressor; | |
| P39836 (YFEH_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Putative symporter YfeH; | |
| P77315 (YPHD_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Probable ABC transporter permease protein YphD; | |
| P15030 (FECC_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Fe(3+) dicitrate transport system permease protein FecC; Iron(III) dicitrate transport system permease protein FecC; | |
| P0AEE5 (MGLB_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | D-galactose/methyl-galactoside binding periplasmic protein MglB; D-galactose-binding periplasmic protein; D-galactose/D-glucose-binding protein; | |
| P37672 (DLGD_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | 2,3-diketo-L-gulonate reductase; 3-dehydro-L-gulonate 2-dehydrogenase; | |
| P76486 (YFBP_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Uncharacterized protein YfbP; | |
| Q46920 (QUEF_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | NADPH-dependent 7-cyano-7-deazaguanine reductase; 7-cyano-7-carbaguanine reductase; NADPH-dependent nitrile oxidoreductase; PreQ(0) reductase; | |
| P77615 (YCJW_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | HTH-type transcriptional repressor YcjW; | |
| P04395 (3MG2_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | DNA-3-methyladenine glycosylase 2; 3-methyladenine-DNA glycosylase II, inducible; DNA-3-methyladenine glycosidase II; DNA-3-methyladenine glycosylase II; | |
| P0AC13 (DHPS_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Dihydropteroate synthase; Dihydropteroate pyrophosphorylase; | |
| P77716 (YCJP_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Maltose transport system permease protein YcjP; | |
| P05637 (APAH_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Bis(5'-nucleosyl)-tetraphosphatase [symmetrical]; Ap4A hydrolase; Diadenosine 5',5'''-P1,P4-tetraphosphate pyrophosphohydrolase; Diadenosine tetraphosphatase; | |
| P37051 (PURU_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Formyltetrahydrofolate deformylase; Formyl-FH(4) hydrolase; | |
| P37634 (RLMJ_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Ribosomal RNA large subunit methyltransferase J; 23S rRNA (adenine(2030)-N6)-methyltransferase; 23S rRNA m6A2030 methyltransferase; | |
| P0ADK6 (YIBA_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Protein YibA; | |
| P17410 (CHBR_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | HTH-type transcriptional regulator ChbR; Chb operon repressor; | |
| P39370 (NANS_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Probable 9-O-acetyl-N-acetylneuraminic acid deacetylase; Probable 9-O-acetyl-N-acetylneuraminate esterase; Probable sialyl esterase NanS; | |
| P77256 (AKRMG_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | NADH-specific methylglyoxal reductase; AKR11B2; | |
| P0CF79 (INSF1_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Transposase InsF for insertion sequence IS3A; | |
| P0CF80 (INSF2_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Transposase InsF for insertion sequence IS3B; | |
| P0CF83 (INSF5_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Transposase InsF for insertion sequence IS3E; | |
| P0CF82 (INSF4_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Transposase InsF for insertion sequence IS3D; | |
| P0CF84 (INSF6_ECOLI) | Swiss-Prot | Escherichia coli (strain K12) | Transposase InsF for insertion sequence IS3fA; |
Escherichia coli is a Gram negative gammaproteobacterium commonly found in the lower intestine of warm-blooded organisms (endotherms). Most E. coli strains are harmless and are part of the normal flora of the gut.
Since E. coli can survive outside the body for a limited amount of time, it is an indicator organism for fecal contamination of the environment. The descendants of two isolates, K-12 and B strain, are used routinely in molecular biology as both a tool and a model organism. It is the most widely studied prokaryotic model organism due to its ease of culturing and short generation time.
The first E. coli genome was sequenced in 1997 (K12 strain).
From left to right: i) The number of proteins in the reference proteome of Escherichia coli, ii) the number of unique protein sequences for which at least one model is available, iii) the total number of models and iv) a coverage bar plot is shown.
The bar plot shows the coverage for every protein in the reference proteome of Escherichia coli for which there is at least one model. Different colours (dark green to red boxes) represent the coverage of the targets. Targets with high coverage are represented in dark green (more than 80% of the target's length is covered by models), whereas low coverage is shown in red. The size of each box is proportional to the number of target sequences with a given coverage.
For information on the latest proteome for Escherichia coli, please visit UniProtKB.
You can easily download the latest protein sequences for Escherichia coli proteome here. Please note this download is for the current UniProtKB release, which may be different to release 2026_01 that was used for the most up to date SWISS-MODEL Repository.
| Proteins in proteome | Sequences modelled | Models |
| 4,403 | 3,758 | 6,310 |
Detailed coverage numbers are obtained by hovering the mouse over one of the boxes.
The plot shows the evolution over years (x-axis) of the fraction of Escherichia coli reference proteome residues (y-axis) for which structural information is available. Different colors (light blue to dark blue) in the plot represent the quality of the sequence alignment between the reference proteome sequences (targets) and the sequences of the proteins in the structure database (templates). Alignments with low sequence identity are displayed in light blue, whereas alignments with high sequence identity are depicted in dark blue. The SWISS-MODEL Template Library is used as database of templates. Only target-template alignments found by HHblits and only residues with atom coordinates are considered.
This chart shows the percentage of residues in the Escherichia coli proteome which are covered by experimental structures and the enhancement of coverage by homology modelling by the SWISS-MODEL pipeline. Experimental residue coverage is determined using SIFTS mapping. For residues which are not covered by experimental structures (including where there are no atom records in SIFTS mapping) the model coverage bars are coloured by QMEANDisCo local quality score.
Many proteins form oligomeric structures either by self-assembly (homo-oligomeric) or by assembly with other proteins (hetero-oligomeric) to accomplish their function. In SWISS-MODEL Repository, the quaternary structure annotation of the template is used to model the target sequence in its oligomeric form. Currently our method is limited to the modelling of homo-oligomeric assemblies. The oligomeric state of the template is only considered if the interface is conserved.
| Single Chain | 2-mer | 3-mer | 4-mer | 5-mer | 6-mer | 7-mer | 8-mer | 9-mer | 10-mer | 11-mer | 12-mer | 14-mer | 15-mer | 16-mer | 20-mer | 22-mer | 24-mer | 25-mer | 26-mer | 30-mer | 34-mer | 40-mer | 44-mer | 48-mer | 60-mer |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3,734 | 1,658 | 130 | 485 | 19 | 144 | 9 | 57 | 4 | 19 | 2 | 16 | 6 | 1 | 1 | 2 | 1 | 11 | 1 | 3 | 1 | 1 | 1 | 1 | 1 | 2 |
