Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4830
Number of amino acids:368
Molecular Weight:40290.92 Da
Theoretical pI:9.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)225.98%
Cysteine CYS (C)71.9%
Glutamic Acid GLU (E)184.89%
Aspartic Acid ASP (D)174.62%
Glycine GLY (G)297.88%
Phynylalanine PHE (F)164.35%
Isoleucine ILE (I)112.99%
Histidine HIS (H)102.72%
Lysine LYS (K)133.53%
Methionine MET (M)41.09%
Leucine LEU (L)308.15%
Asparagine ASN (N)123.26%
Glutamine GLN (Q)102.72%
Proline PRO (P)277.34%
Serine SER (S)338.97%
Arginine ARG (R)308.15%
Threonine THR (T)277.34%
Tryptophan TRP (W)61.63%
Valine VAL (V)4211.41%
Tyrosine TYR (Y)41.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1783
HydrogenH2831
NitrogenN519
OxygenO525
SulphurS11

FormulaC1783H2831N519O525S11
Total Number of Atoms:5669


Total number of positively charged residues (ARG + LYS):43
Total number of negatively charged residues (ASP + GLU):35
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39335
Absorption 0.1% (=1 g/l)    0.976,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38960
Absorption 0.1% (=1 g/l)    0.967,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.27

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.62, 27.45, 20.11]

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:82.527
Grand average of hydropathicity (GRAVY):-0.21