Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5299
Number of amino acids:335
Molecular Weight:37568.08 Da
Theoretical pI:8.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)164.78%
Cysteine CYS (C)82.39%
Glutamic Acid GLU (E)154.48%
Aspartic Acid ASP (D)195.67%
Glycine GLY (G)216.27%
Phynylalanine PHE (F)154.48%
Isoleucine ILE (I)154.48%
Histidine HIS (H)82.39%
Lysine LYS (K)226.57%
Methionine MET (M)133.88%
Leucine LEU (L)319.25%
Asparagine ASN (N)175.07%
Glutamine GLN (Q)113.28%
Proline PRO (P)164.78%
Serine SER (S)339.85%
Arginine ARG (R)164.78%
Threonine THR (T)185.37%
Tryptophan TRP (W)20.6%
Valine VAL (V)257.46%
Tyrosine TYR (Y)144.18%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1664
HydrogenH2619
NitrogenN451
OxygenO497
SulphurS21

FormulaC1664H2619N451O497S21
Total Number of Atoms:5252


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):34
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32360
Absorption 0.1% (=1 g/l)    0.861,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31860
Absorption 0.1% (=1 g/l)    0.848,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.96

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.45, 25.97, 22.39]

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:79.9701
Grand average of hydropathicity (GRAVY):-0.26