Table 2

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

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*

*Significance at p < 10-5 ; †significance at p < 10-3. Organism abbreviations are listed in Table 1.

Paul et al. Genome Biology 2008 9:R70   doi:10.1186/gb-2008-9-4-r70