Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4758
Number of amino acids:358
Molecular Weight:38959.07 Da
Theoretical pI:6.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)318.66%
Cysteine CYS (C)92.51%
Glutamic Acid GLU (E)226.15%
Aspartic Acid ASP (D)164.47%
Glycine GLY (G)359.78%
Phynylalanine PHE (F)154.19%
Isoleucine ILE (I)143.91%
Histidine HIS (H)82.23%
Lysine LYS (K)246.7%
Methionine MET (M)71.96%
Leucine LEU (L)277.54%
Asparagine ASN (N)174.75%
Glutamine GLN (Q)133.63%
Proline PRO (P)92.51%
Serine SER (S)318.66%
Arginine ARG (R)113.07%
Threonine THR (T)185.03%
Tryptophan TRP (W)61.68%
Valine VAL (V)318.66%
Tyrosine TYR (Y)143.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1728
HydrogenH2681
NitrogenN467
OxygenO528
SulphurS16

FormulaC1728H2681N467O528S16
Total Number of Atoms:5420


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    54360
Absorption 0.1% (=1 g/l)    1.395,   assuming all pairs of CYS residues form cystines

Ext. coefficient    53860
Absorption 0.1% (=1 g/l)    1.382,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.83

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.89, 25.70, 24.30]

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:78.4357
Grand average of hydropathicity (GRAVY):-0.19