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Table 1 Information about the 20 experimentally confirmed circular bacteriocins and their producer strains. P denotes the characteristic is putative based on the shared characteristics with the other circular bacteriocins

From: Bioinformatic prospecting and phylogenetic analysis reveals 94 undescribed circular bacteriocins and key motifs

ClassCircular bacteriocinBacterial producer3D structureα helicesaa size of mature peptide (Mass in Da)Cluster locationConjugative plasmid (Y/N/Unknown)Genes in clusterTranslational couplingAccession numberSource
iAureocyclicin 4185Staphylococcus aureus 4185Model based on carnocyclin A4P60 (5607 Da)pRJ101Unknown (data unavailable)11YKF836421[18]
iEnterocin NKR-5-3BEnterococcus faecium NKR-5-3BNMR solution structure464 (6316.4 Da)Unknown (data unavailable)N5YLC068607[11]
iAmylocyclicinBacillus amyloliquefaciens FZB42N/A4P64 (6382 Da)ChromosomeN6YCP000560.1[19]
iAmylocyclicin CMW1Bacillus amyloliquefaciens CMW1N/A4P64 (6351.59 Da)ChromosomeN6YDF836085[20]
iAS-48Enterococcus faecalis subsp. liquefaciens S-48NMR solution structure570 (7150.17 Da)pMB2Y10YAJ438950.1[3]
ibacAEnterococcus faecalis 39–5N/A5P70 (7150.17 Da)pPD1Y9YD85752[21]
iCarnocyclin ACarnobacterium maltaromaticum UAL307NMR460 (5862 Da)Unknown (data unavailable)Unknown (data unavailable)10YEU624394[22]
iCircularin AClostridium beijerinckii ATCC 25752N/A5P69 (6789.05 Da)ChromosomeN8YAJ566621.1[23]
iThermocin 458Geobacillus stearothermophilus DSM 458N/A5P70 (6933.25 Da)ChromosomeN8YNZ_CP016552.1[24]
iGarvicin MLLactococcus garvieae DCC43PSIPRED and Jpred3 model4P60 (6007.2 Da)ChromosomeN8PYNZ_AMQS01000001[25]
iLactocyclicin QLactococcus sp. QU 12Model using PSIPRED4P61 (6062.8 Da)Unknown (data unavailable)Unknown (data unavailable)Unknown (data unavailable)YAB462499.1[26]
iLeucocyclicin QLeuconostoc mesenteroides TK41401N/A4P61 (6133.23 Da)Unknown (data unavailable)Unknown (data unavailable)5YAB795997.1[27]
iPumilarinBacillus pumilus B4107N/A5P70 (7083.08 Da)ChromosomeN5YNZ_AMDH01000012.1[28]
iUberolysinStreptococcus uberis 42N/A5P70 (7043.94 Da)ChromosomeN6PYDQ650653[29]
iiAcidocin BLactobacillus acidophilus M46NMR solution structure458 (5621.5 Da)pCV461Unknown (data unavailable)7YKP728900.1[30]
iiButyrivibriocin AR10Butyrivibrio fibrisolvens AR10N/A4P58 (5981.5 Da)ChromosomeN5YAF076529[31]
iiParacyclicinLactobacillus. paracesei subsp. paracasei JCM 8130/
DSM 5622
N/A4P58 (5905.75 Da)pLBPC-1Y7PYNZ_AP012542.1[32]
iiGassericin A/
Reutericin 6
Lactobacillus gasseri LA39/
Lactobacillus reuteri LA6
N/A4P58 (5653.6 Da)pLgLA39Y7YAB436615.1[2]
iiPlantacyclin B21AGLactobacillus plantarum B21N/A4P58 (5668 Da)pB21AG01YP7YNZ_CP025732.1[33]
iiPlantaricyclin ALactobacillus plantarum NI326N/A4P58 (5572 Da)pB21AG01-like plasmidYP7YNZ_NDXC01000075.1[4]