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Table 2 Differences between various indices of four sets of halophile proteins and their non-halophilic orthologs

From: Molecular signature of hypersaline adaptation: insights from genome and proteome composition of halophilic prokaryotes

  Mean
  Set I (287 pairs of orthologous proteins) Set II (104 pairs of orthologous proteins) Set III (584 pairs of orthologous proteins) Set IV (574 pairs of orthologous proteins)
Indices SRUB proteins PLUT proteins HMAR1 proteins PPUT proteins HMAR1 proteins MTHP proteins NPHA proteins UMET proteins
Average hydrophobicity [52] -0.37 -0.20* -0.32 -0.12* -0.37 -0.16* -0.33 -0.20*
Positively charged residues (%) 10.33 12.26* 8.10 10.44* 8.84 13.03* 9.08 12.92*
Negatively charged residues (%) 17.13* 13.40 18.87* 12.32 19.54* 14.01 19.38* 13.50
Isoelectric point 5.09 6.61* 4.38 6.31* 4.46 6.70* 4.49 6.96*
Cysteine residue (%) 0.74 0.96 0.85 1.23 0.82 1.25* 0.81 1.18*
Valine residue (%) 8.07* 7.42 8.69 7.95 8.84* 8.16 9.03* 8.01
Threonine residue (%) 5.84* 5.12 6.22* 5.09 6.08* 4.17 6.11* 5.29
Large, hydrophobic residues (I, L, M, F) (%) 18.62 22.06* 17.72 21.12* 16.79 22.26* 16.72 21.46*
  1. *Significance at p < 10-5 ; significance at p < 10-3. Organism abbreviations are listed in Table 1.