Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4673
Number of amino acids:293
Molecular Weight:34095.8 Da
Theoretical pI:8.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)165.46%
Cysteine CYS (C)72.39%
Glutamic Acid GLU (E)113.75%
Aspartic Acid ASP (D)186.14%
Glycine GLY (G)206.83%
Phynylalanine PHE (F)217.17%
Isoleucine ILE (I)134.44%
Histidine HIS (H)62.05%
Lysine LYS (K)165.46%
Methionine MET (M)51.71%
Leucine LEU (L)237.85%
Asparagine ASN (N)155.12%
Glutamine GLN (Q)134.44%
Proline PRO (P)144.78%
Serine SER (S)175.8%
Arginine ARG (R)206.83%
Threonine THR (T)175.8%
Tryptophan TRP (W)103.41%
Valine VAL (V)175.8%
Tyrosine TYR (Y)144.78%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1553
HydrogenH2323
NitrogenN419
OxygenO428
SulphurS12

FormulaC1553H2323N419O428S12
Total Number of Atoms:4735


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):29
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    76235
Absorption 0.1% (=1 g/l)    2.236,   assuming all pairs of CYS residues form cystines

Ext. coefficient    75860
Absorption 0.1% (=1 g/l)    2.225,   assuming all CYS residues are reduced
Aromaticity:0.154

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.11

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.45, 22.53, 18.77]

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:70.2048
Grand average of hydropathicity (GRAVY):-0.42