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Table 3 Average values for the 49 properties used in the present study

From: Distinct position-specific sequence features of hexa-peptides that form amyloid-fibrils: application to discriminate between amyloid fibril and amorphous β-aggregate forming peptide sequences

Property

Amyloid

Non-amyloid

Difference

K 0

-31.966

-31.675

-0.291

H t

1.693

1.546

0.147

H p

13.461

13.001

0.460

P

6.535

12.132

-5.597

pH i

5.801

5.997

-0.196

pK'

2.004

2.046

-0.042

M w

134.369

135.217

-0.848

B l

17.329

16.377

0.952

R f

12.353

11.152

1.202

μ

18.155

18.051

0.104

H nc

0.497

0.264

0.233

E sm

1.207

1.201

0.006

E l

0.608

0.563

0.044

E t

1.817

1.767

0.050

P α

1.032

1.050

-0.018

P β

1.231

1.088

0.143

P t

0.817

0.879

-0.062

P c

0.875

0.926

-0.051

C a

34.890

34.666

0.224

F

0.895

0.934

-0.039

B r

0.369

0.321

0.048

R a

4.998

4.409

0.589

N s

6.544

6.250

0.294

αN

1.111

1.079

0.032

αC

0.929

1.030

-0.101

αm

0.968

0.990

-0.022

V0

95.343

94.341

1.002

N m

1.818

1.848

-0.030

N l

4.497

4.179

0.318

H gm

13.845

13.459

0.386

ASA D

156.030

156.043

-0.013

ASA N

43.340

49.795

-6.455

ΔASA

112.345

105.918

6.427

ΔGh

-1.662

-1.903

0.241

GhD

-2.864

-3.460

0.596

GhN

-1.172

-1.455

0.283

ΔHh

-4.896

-4.964

0.067

-TΔSh

3.235

3.061

0.174

ΔCph

25.269

22.474

2.796

ΔGc

1.854

2.074

-0.220

ΔHc

5.833

5.733

0.100

-T ΔSc

-3.983

-3.663

-0.321

Δ G

0.190

0.170

0.020

Δ H

0.934

0.766

0.168

-TΔS

-0.744

-0.597

-0.147

v

4.253

4.314

-0.061

s

1.382

1.460

-0.078

f

1.788

1.916

-0.128

Pϕ-ψ

0.817

0.955

-0.138

  1. Abbre viations: K0, compressibility; Ht, thermodynamic transfer hydrophobicity; Hp, surrounding hydrophobicity; P, polarity; pH i, isoelectric point; pK':equilibrium constant with reference to the ionization property of COOH group; Mw, molecular weight; Bl , bulkiness; Rf, chromatographic index; β,refractive index; Hnc , normalized consensus hydrophobicity; Esm, short and medium range non-bonded energy; El , long-range non-bonded energy; Et, total non-bonded energy; Pα, Pβ, Pt and Pc are, respectively, β-helical, β-structure, turn and coil tendencies; Ca, helical contact area; F, mean rms fluctuational displacement; Br, buriedness; Ra, solvent accessible reduction ratio; Ns , average number of surrounding residues; βN, βC and βm are, respectively, power to be at the N-terminal, C-terminal and middle of β-helix; V0, partial-specific volume; Nm and Nl are, respectively, average medium and long-range contacts; Hgm, combined surrounding hydrophobicity (globular and membrane); ASAD, ASAN and βASA are, respectively, solvent accessible surface area for denatured, native and unfolding; βGh , GhD and GhN are, respectively, Gibbs free energy change of hydration for unfolding, denatured and native protein; βHh, unfolding enthalpy change of hydration; -T βSh, unfolding entropy change of hydration; βCph , unfolding hydration heat capacity change; βGc , βHc and -T βSc are, respectively, unfolding Gibbs free energy, unfolding enthalpy and unfolding entropy changes of chain; βG, βH and -T βS are, respectively, unfolding Gibbs free energy change, unfolding enthalpy change and unfolding entropy change; v, volume (number of non-hydrogen side chain atoms); s, shape (position of branch point in a side-chain); f, flexibility (number of side-chain dihedral angles); Pϕ-ψ: backbone dihedral probability.