Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4501
Number of amino acids:587
Molecular Weight:65875.63 Da
Theoretical pI:7.14


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)366.13%
Cysteine CYS (C)71.19%
Glutamic Acid GLU (E)305.11%
Aspartic Acid ASP (D)213.58%
Glycine GLY (G)457.67%
Phynylalanine PHE (F)325.45%
Isoleucine ILE (I)376.3%
Histidine HIS (H)213.58%
Lysine LYS (K)305.11%
Methionine MET (M)162.73%
Leucine LEU (L)498.35%
Asparagine ASN (N)406.81%
Glutamine GLN (Q)152.56%
Proline PRO (P)539.03%
Serine SER (S)315.28%
Arginine ARG (R)203.41%
Threonine THR (T)305.11%
Tryptophan TRP (W)142.39%
Valine VAL (V)386.47%
Tyrosine TYR (Y)223.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3018
HydrogenH4568
NitrogenN788
OxygenO828
SulphurS23

FormulaC3018H4568N788O828S23
Total Number of Atoms:9225


Total number of positively charged residues (ARG + LYS):50
Total number of negatively charged residues (ASP + GLU):51
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    110155
Absorption 0.1% (=1 g/l)    1.672,   assuming all pairs of CYS residues form cystines

Ext. coefficient    109780
Absorption 0.1% (=1 g/l)    1.666,   assuming all CYS residues are reduced
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.71, 28.79, 22.32]

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:82.0443
Grand average of hydropathicity (GRAVY):-0.20