Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4260
Number of amino acids:417
Molecular Weight:46727.7 Da
Theoretical pI:8.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)337.91%
Cysteine CYS (C)102.4%
Glutamic Acid GLU (E)143.36%
Aspartic Acid ASP (D)225.28%
Glycine GLY (G)368.63%
Phynylalanine PHE (F)163.84%
Isoleucine ILE (I)307.19%
Histidine HIS (H)194.56%
Lysine LYS (K)92.16%
Methionine MET (M)133.12%
Leucine LEU (L)225.28%
Asparagine ASN (N)296.95%
Glutamine GLN (Q)92.16%
Proline PRO (P)122.88%
Serine SER (S)348.15%
Arginine ARG (R)348.15%
Threonine THR (T)245.76%
Tryptophan TRP (W)112.64%
Valine VAL (V)266.24%
Tyrosine TYR (Y)143.36%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2048
HydrogenH3153
NitrogenN615
OxygenO600
SulphurS23

FormulaC2048H3153N615O600S23
Total Number of Atoms:6439


Total number of positively charged residues (ARG + LYS):43
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    81985
Absorption 0.1% (=1 g/l)    1.755,   assuming all pairs of CYS residues form cystines

Ext. coefficient    81360
Absorption 0.1% (=1 g/l)    1.741,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.68

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.54, 26.62, 19.66]

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:74.6283
Grand average of hydropathicity (GRAVY):-0.32