Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4025
Number of amino acids:351
Molecular Weight:39054.78 Da
Theoretical pI:5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)277.69%
Cysteine CYS (C)82.28%
Glutamic Acid GLU (E)215.98%
Aspartic Acid ASP (D)154.27%
Glycine GLY (G)287.98%
Phynylalanine PHE (F)164.56%
Isoleucine ILE (I)205.7%
Histidine HIS (H)20.57%
Lysine LYS (K)143.99%
Methionine MET (M)123.42%
Leucine LEU (L)154.27%
Asparagine ASN (N)267.41%
Glutamine GLN (Q)123.42%
Proline PRO (P)133.7%
Serine SER (S)3610.26%
Arginine ARG (R)143.99%
Threonine THR (T)164.56%
Tryptophan TRP (W)82.28%
Valine VAL (V)277.69%
Tyrosine TYR (Y)215.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1733
HydrogenH2617
NitrogenN457
OxygenO535
SulphurS20

FormulaC1733H2617N457O535S20
Total Number of Atoms:5362


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    75790
Absorption 0.1% (=1 g/l)    1.941,   assuming all pairs of CYS residues form cystines

Ext. coefficient    75290
Absorption 0.1% (=1 g/l)    1.928,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.48, 29.34, 21.37]

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:68.8889
Grand average of hydropathicity (GRAVY):-0.27