Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1035
Number of amino acids:247
Molecular Weight:25848.56 Da
Theoretical pI:6.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.67%
Cysteine CYS (C)187.29%
Glutamic Acid GLU (E)72.83%
Aspartic Acid ASP (D)114.45%
Glycine GLY (G)3112.55%
Phynylalanine PHE (F)104.05%
Isoleucine ILE (I)114.45%
Histidine HIS (H)31.21%
Lysine LYS (K)104.05%
Methionine MET (M)41.62%
Leucine LEU (L)208.1%
Asparagine ASN (N)124.86%
Glutamine GLN (Q)83.24%
Proline PRO (P)145.67%
Serine SER (S)2610.53%
Arginine ARG (R)72.83%
Threonine THR (T)114.45%
Tryptophan TRP (W)31.21%
Valine VAL (V)218.5%
Tyrosine TYR (Y)62.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1125
HydrogenH1765
NitrogenN307
OxygenO347
SulphurS22

FormulaC1125H1765N307O347S22
Total Number of Atoms:3566


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26565
Absorption 0.1% (=1 g/l)    1.028,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    0.984,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.74, 33.60, 18.22]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:79.2713
Grand average of hydropathicity (GRAVY):0.13