Physicochemical Properties of Peptide



PPepDB ID:PPepDB_832
Number of amino acids:245
Molecular Weight:25106.16 Da
Theoretical pI:4.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)249.8%
Cysteine CYS (C)197.76%
Glutamic Acid GLU (E)52.04%
Aspartic Acid ASP (D)145.71%
Glycine GLY (G)3012.24%
Phynylalanine PHE (F)114.49%
Isoleucine ILE (I)72.86%
Histidine HIS (H)41.63%
Lysine LYS (K)72.86%
Methionine MET (M)20.82%
Leucine LEU (L)166.53%
Asparagine ASN (N)104.08%
Glutamine GLN (Q)52.04%
Proline PRO (P)135.31%
Serine SER (S)218.57%
Arginine ARG (R)20.82%
Threonine THR (T)2510.2%
Tryptophan TRP (W)31.22%
Valine VAL (V)187.35%
Tyrosine TYR (Y)93.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1092
HydrogenH1662
NitrogenN284
OxygenO354
SulphurS21

FormulaC1092H1662N284O354S21
Total Number of Atoms:3413


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31035
Absorption 0.1% (=1 g/l)    1.236,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.191,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.53

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.12, 30.20, 19.18]

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:67.7143
Grand average of hydropathicity (GRAVY):0.18