Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4980
Number of amino acids:374
Molecular Weight:41136.72 Da
Theoretical pI:5.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)359.36%
Cysteine CYS (C)20.53%
Glutamic Acid GLU (E)215.61%
Aspartic Acid ASP (D)215.61%
Glycine GLY (G)246.42%
Phynylalanine PHE (F)154.01%
Isoleucine ILE (I)205.35%
Histidine HIS (H)61.6%
Lysine LYS (K)225.88%
Methionine MET (M)112.94%
Leucine LEU (L)3910.43%
Asparagine ASN (N)174.55%
Glutamine GLN (Q)154.01%
Proline PRO (P)164.28%
Serine SER (S)277.22%
Arginine ARG (R)102.67%
Threonine THR (T)338.82%
Tryptophan TRP (W)20.53%
Valine VAL (V)205.35%
Tyrosine TYR (Y)184.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1840
HydrogenH2882
NitrogenN472
OxygenO569
SulphurS13

FormulaC1840H2882N472O569S13
Total Number of Atoms:5776


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37945
Absorption 0.1% (=1 g/l)    0.922,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37820
Absorption 0.1% (=1 g/l)    0.919,   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 : 35.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.48, 22.46, 28.34]

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:86.3903
Grand average of hydropathicity (GRAVY):-0.16