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Table 2 Correlations between SP properties and measured extracellular NucA activities.a

From: Genome-wide analysis of signal peptide functionality in Lactobacillus plantarum WCFS1

Ranked after NucA activityb

Lenght of SPs

pI of SPs

Hydro-phobicityc

Length of N-domaind

Net charge of the N-domaind

Charge/length of the N-domaind

Length of H-plus C-domainsd

1-10

34.5

9.8

2.98

7.2

3.1

0.5

27

65-78

32.8

10.1

2.31

9.9

3.0

0.4

23

1-39

31.6

10.3

2.77

7.4

2.9

0.5

24

40-78

31.1

10.1

2.26

9.1

3.0

0.4

22

1-78

31.3

10.2

2.52

8.3

3.0

0.4

23

  1. aAverage values for different properties were calculated for SPs grouped by NucA activity.
  2. bSubgroups of the 78 SPs were made as indicated, with SPs being numbered by their ability to produce extracellular NucA activity, with SP number 1 having the highest activity; see text for further details.
  3. c The hydrophobicity of the SPs was estimated using the ProtScale program [66] using the Kyte & Doolittle scale [67] on the ExPASy Server http://www.expasy.ch/tools/protscale.html. The numbers indicate the maximum hydrophobicity value, using a sliding window size of seven.
  4. d See text for definition of the domains. Nb. We verified that the length of the H+C domain is not correlated to the maximum hydrophobicity defined in footnote c (results not shown).
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BMC Genomics

ISSN: 1471-2164

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