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LF f(18-37) [id=LFB0095]

Producer Organism : Native Protein : Production Method :
Cow Lactoferrin (LF) Synthetic
Activity : Antibacterial, antifungal
Target Organisms :

Gram-positive: Staphylococcus aureus ATCC 25923 (MIC=16 g/ml).

Gram-negative: Escherichia coli ATCC 25922 (MIC=16 g/ml).

Yeast: Candida albicans ATCC 14053 (MIC=8 g/ml).

Description :
Production method: Synthetic.

In the 20-residue LFcin peptides, LFcin B-20 (LFB0095) was the most active against Gram-negative and Gram-positive bacteria and fungi. In addition, LFcin P-20 (LFP0003) also showed high growth-inhibitory activity against E. coli, S. aureus, and C. albicans when compared with LFcin H-20 (LFH0028). The nine-residue LFcin peptides (LFH0043, LFB0098, LFP0004) are less active than twenty-residue LFcin peptides (LFH0028, LFB0095, LFP0003) (Citation: 1).
Length : 20 Mass (Da): 2 448.40 Common Amino Acids : KR
Isolectric Point : 11.65 Net Charge : 6 Absent Amino Acids : DEFHNY
Basic Residues : 6 Acidic Residues : 0 Hydrophobic Residues : 6
Polar Residues : 5 Boman Index : -46.72 Hydropathy Index : -0.64
Aliphatic Index : 58.5 Instability Index : 0 Extinction Coefficient : 11125
Absorbance 280nm : 585.53

Wheel representation

Hydrophobicity plot

Red solid plot : values according to the hydrophobicity scale of Kyte and Doolittle (reference paper).
Yellow dashed plot : Experimentally determined hydrophobicity scale for proteins at membrane interfaces(reference paper).
Green dotted-dashed plot : prediction of transmembrane helices (reference paper). In this scale (unlike the others), more negative values reflect greater hydrophobicity.

Multiple Sequence Alignment (MSA)


                      1 [        .         .         . ] 32
  1 LFBNATIVE 100.0%    FKCRRWQWRMKKLGAPSITCVRRAFALECIRA   
  2 LFB0017   100.0%    FKCRRWQWR-----------------------   
  3 LFB0043    93.3%    FKCRRWQWRAKKLGA-----------------   
  4 LFB0052    86.7%    FKCWRWQWRWKKLGA-----------------   
  5 LFB0037    93.3%    FKCARWQWRMKKLGA-----------------   
  6 LFB0040    93.3%    FKCRRWAWRMKKLGA-----------------   
  7 LFB0038    93.3%    FKCRAWQWRMKKLGA-----------------   
  8 LFB0088    96.0%    FKCRRWQWRMKKLGAPSITCVRRAE-------   
  9 LFB0039    93.3%    FKCRRAQWRMKKLGA-----------------   
 10 LFB0062    93.3%    FKCRRAQWRMKKLGA-----------------   
 11 LFB0072    93.3%    FKCRRAQWRMKKLGA-----------------   
 12 LFB0075    93.3%    FKCRRAQWRMKKLGA-----------------   
 13 LFB0078    93.3%    FKCRRAQWRMKKLGA-----------------   
 14 LFB0064    86.7%    FKCRRAQARMKKLGA-----------------   
 15 LFB0117    54.5%    ---RRAAARAKKAG------------------   
 16 LFB0080    86.7%    FKCRRAQARMKKLGA-----------------   
 17 LFB0074    86.7%    FKCRRAQARMKKLGA-----------------   
 18 LFB0077    86.7%    FKCRRAQARMKKLGA-----------------   
 19 LFB0056    93.3%    FKCRRFQWRMKKLGA-----------------   
 20 LFB0059    93.3%    FKCRRFQWRMKKLGA-----------------   
 21 LFB0053    93.3%    FKCRRFQWRMKKLGA-----------------   
 22 LFB0081    93.3%    FKCRRFQWRMKKLGA-----------------   
 23 LFB0055    86.7%    FKCRRFQFRMKKLGA-----------------   
 24 LFB0058    86.7%    FKCRRFQFRMKKLGA-----------------   
 25 LFB0061    86.7%    FKCRRFQFRMKKLGA-----------------   
 26 LFB0083    86.7%    FKCRRFQFRMKKLGA-----------------   
 27 LFB0041    93.3%    FKCRRWQARMKKLGA-----------------   
 28 LFB0063    93.3%    FKCRRWQARMKKLGA-----------------   
 29 LFB0076    93.3%    FKCRRWQARMKKLGA-----------------   
 30 LFB0079    93.3%    FKCRRWQARMKKLGA-----------------   
 31 LFB0073    93.3%    FKCRRWQARMKKLGA-----------------   
 32 LFB0060    93.3%    FKCRRWQFRMKKLGA-----------------   
 33 LFB0082    93.3%    FKCRRWQFRMKKLGA-----------------   
 34 LFB0057    93.3%    FKCRRWQFRMKKLGA-----------------   
 35 LFB0054    93.3%    FKCRRWQFRMKKLGA-----------------   
 36 LFB0042    93.3%    FKCRRWQWAMKKLGA-----------------   
 37 LFB0115    81.8%    ---RRWQRWMKKLG------------------   
 38 LFB0033   100.0%    FKCRRWQWRMKKLGA-----------------   
 39 LFB0032   100.0%    FKCRRWQWRMKKLGA-----------------   
 40 LFB0031   100.0%    FKCRRWQWRMKKLGA-----------------   
 41 LFB0050    86.7%    FKWRRWQWRMKKLWA-----------------   
 42 LFB0051    80.0%    FKWRRWWWRMKKLWA-----------------   
 43 LFB0049    93.3%    FKCRRWQWRMKKLWA-----------------   
 44 LFB0018   100.0%    FKCRRWQWRM----------------------   
 45 LFB0020   100.0%    FKCRRWQWRMK---------------------   
 46 LFB0045    93.3%    FKCRRWQWRMKALGA-----------------   
 47 LFB0044    93.3%    FKCRRWQWRMAKLGA-----------------   
 48 LFB0097   100.0%    ---RRWQWR-----------------------   
 49 LFB0030   100.0%    FKCRRWQWRMKKLG------------------   
 50 LFB0087   100.0%    FKCRRWQWRMKKLGAPSITCVRRAF-------   
 51 LFB0024    54.5%    YKAWRWAWRWK---------------------   
 52 LFB0025    54.5%    YKAWRWAWRWK---------------------   
 53 LFB0027    36.4%    YRMWRWAWRWR---------------------   
 54 LFB0028    36.4%    YRMWRWRWRWR---------------------   
 55 LFB0026    36.4%    YRAWRWAWRWR---------------------   
 56 LFB0023    63.6%    YKARRWAWRWK---------------------   
 57 LFB0022    72.7%    YKARRWAWRMK---------------------   
 58 LFB0021    81.8%    FKARRWAWRMK---------------------   
 59 LFB0019    90.0%    FKARRWQWRM----------------------   
 60 LFB0036    93.3%    FKARRWQWRMKKLGA-----------------   
 61 LFB0070    93.3%    FKARRWQWRMKKLGA-----------------   
 62 LFB0069    93.3%    FKARRWQWRMKKLGA-----------------   
 63 LFB0068    93.3%    FKARRWQWRMKKLGA-----------------   
 64 LFB0065    93.3%    FKARRWQWRMKKLGA-----------------   
 65 LFB0106   100.0%    ---RRWQWRMKK--------------------   
 66 LFB0029    45.5%    RRWYRWAWRMR---------------------   
 67 LFB0118   100.0%    ----RWQWRM----------------------   
 68 LFB0113    81.8%    ---RRWQWRMRRLG------------------   
 69 LFB0112    72.7%    ---KKWQWKMKKLG------------------   
 70 LFB0114    81.8%    ---KKWQWRMKKLG------------------   
 71 LFB0116    54.5%    ---EEWQWEMEELG------------------   
 72 LFB0048    93.3%    FKWRRWQWRMKKLGA-----------------   
 73 LFB0090    92.0%    FKSRRWQWRMKKLGAPSITSVRRAF-------   
 74 LFB0110    18.2%    ----RRWQWRMKKLG-----------------   
 75 LFB0067    93.3%    FKFRRWQWRMKKLGA-----------------   
 76 LFB0071    93.3%    FKFRRWQWRMKKLGA-----------------   
 77 LFB0066    93.3%    FKFRRWQWRMKKLGA-----------------   
 78 LFB0108   100.0%    ---RRWQWRMKKL-------------------   
 79 LFB0102   100.0%    ---RRWQWRMKK--------------------   
 80 LFB0034    93.3%    AKCRRWQWRMKKLGA-----------------   
 81 LFB0111   100.0%    ---RRWQWRMKKLG------------------   
 82 LFB0104   100.0%    ---RRWQWRMKK--------------------   
 83 LFB0035    93.3%    FACRRWQWRMKKLGA-----------------   
 84 LFB0109   100.0%    ---RRWQWRMKKLG------------------   
 85 LFB0101   100.0%    ---RRWQWRMKK--------------------   
 86 LFB0046    93.3%    FKCRRWQWRMKKAGA-----------------   
 87 LFB0107   100.0%    ---RRWQWRMKK--------------------   
 88 LFB0100   100.0%    ---RRWQWRMKK--------------------   
 89 LFB0047    93.3%    FKCRRWQWRMKKLAA-----------------   
 90 LFB0098   100.0%    ---RRWQWRMKK--------------------   
 91 LFB0105   100.0%    ---RRWQWRMKK--------------------   
 92 LFB0103   100.0%    ---RRWQWRMKK--------------------   
 93 LFB0086   100.0%    FKCRRWQWRMKKLGAPSITCVRRAF-------   
 94 LFB0089   100.0%    FKCRRWQWRMKKLGAPSITCVRRAF-------   
 95 LFB0085   100.0%    FKCRRWQWRMKKLGAPSITCVRRAF-------   
 96 LFB0084   100.0%    FKCRRWQWRMKKLGAPSITCVRRAF-------   
 97 LFB0092   100.0%    FKCRRWQWRMKKLGAPSITCVRRAFA------   
 98 LFB0095   100.0%    -KCRRWQWRMKKLGAPSITCV-----------   
 99 LFB0096   100.0%    --CRRWQWRMKKLGAPSITCV-----------   

100 LFB0093   100.0%    FKCRRWQWRMKKLGAPSITCVRRAFAL-----   

101 LFB0091   100.0%    FKCRRWQWRMKKLGAPSITCVRRAFA------   

102 LFB0119   100.0%    ----------KKLGAPSITCVRRAFA------   
103 LFB0120   100.0%    -------------GAPSITCVRRAF-------   

104 LFB0121   100.0%    ----------------------------CIRA   
105 LFB0094   100.0%    FKCRRWQWRMKKLGAPSITCVRRAFALECIR-   

Citation: 1

Synthetic porcine lactoferricin with a 20-residue peptide exhibits antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans

Cited Entries: LFH0028, LFH0043, LFB0095, LFB0098, LFP0003, LFP0004

Authors:Chen, H.-L., Yen, C.-C., Lu, C.-Y., Yu, C.-H., Chen, C.-M.
Journal: Journal of Agricultural and Food Chemistry 2006, 54(9).
CrossRef External Link
Abstract: Lactoferricins are positively charged, highly basic peptides that are generated upon gastric pepsin cleavage of various lactoferrins. In the past decade, there has been active investigation of the key antimicrobial segments of the various shorter synthetic bovine and human lactoferricins, but not in porcine lactoferricin. These studies have demonstrated the distinct solution structures of lactoferricin in bovine and human and established the multifunctional nature of the antibacterial, antifungal, antiendotoxin, and antiviral activities of lactoferricins. However, the protective effects of porcine lactoferricins have yet to be elucidated. In the present study, a series of synthetic derivatives of porcine, bovine, and human lactoferricins with 20-residue and 9-residue peptides were prepared to investigate their antimicrobial nature. We found that the 20-residue porcine lactoferricin (LFcin P-20) displayed antimicrobial activity against Escherichia coli ATCC25922, Staphylococcus aureus ATCC25923, and Candida albicans ATCC14053. The minimal inhibitory concentrations and minimal bactericidal concentrations of LFcin P-20 ranged from 12 to 25 μM when tested in bacteria and fungi. LFcin P-20 was 4 times more effective than human lactoferricin (LFcin H-20), but slightly less effective than bovine lactoferricin (LFcin B-20).
Keywords: Porcine lactoferricin; antimicrobial activity; synthetic peptide; minimal inhibitory concentration (MIC); minimal bactericidal concentration (MBC).

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