Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4531
Number of amino acids:760
Molecular Weight:83602.83 Da
Theoretical pI:9.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)506.58%
Cysteine CYS (C)91.18%
Glutamic Acid GLU (E)486.32%
Aspartic Acid ASP (D)364.74%
Glycine GLY (G)455.92%
Phynylalanine PHE (F)354.61%
Isoleucine ILE (I)283.68%
Histidine HIS (H)111.45%
Lysine LYS (K)577.5%
Methionine MET (M)182.37%
Leucine LEU (L)678.82%
Asparagine ASN (N)303.95%
Glutamine GLN (Q)233.03%
Proline PRO (P)668.68%
Serine SER (S)759.87%
Arginine ARG (R)425.53%
Threonine THR (T)425.53%
Tryptophan TRP (W)50.66%
Valine VAL (V)607.89%
Tyrosine TYR (Y)131.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3716
HydrogenH5937
NitrogenN1023
OxygenO1112
SulphurS27

FormulaC3716H5937N1023O1112S27
Total Number of Atoms:11815


Total number of positively charged residues (ARG + LYS):99
Total number of negatively charged residues (ASP + GLU):84
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    47370
Absorption 0.1% (=1 g/l)    0.567,   assuming all pairs of CYS residues form cystines

Ext. coefficient    46870
Absorption 0.1% (=1 g/l)    0.561,   assuming all CYS residues are reduced
Aromaticity:0.070

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.79

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.37, 28.42, 24.08]

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:78.2237
Grand average of hydropathicity (GRAVY):-0.37