Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5475
Number of amino acids:339
Molecular Weight:35938.74 Da
Theoretical pI:6.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3510.32%
Cysteine CYS (C)102.95%
Glutamic Acid GLU (E)113.24%
Aspartic Acid ASP (D)92.65%
Glycine GLY (G)319.14%
Phynylalanine PHE (F)226.49%
Isoleucine ILE (I)339.73%
Histidine HIS (H)82.36%
Lysine LYS (K)164.72%
Methionine MET (M)164.72%
Leucine LEU (L)4112.09%
Asparagine ASN (N)113.24%
Glutamine GLN (Q)72.06%
Proline PRO (P)154.42%
Serine SER (S)277.96%
Arginine ARG (R)30.88%
Threonine THR (T)175.01%
Tryptophan TRP (W)20.59%
Valine VAL (V)205.9%
Tyrosine TYR (Y)51.47%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1642
HydrogenH2608
NitrogenN400
OxygenO447
SulphurS26

FormulaC1642H2608N400O447S26
Total Number of Atoms:5123


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    19075
Absorption 0.1% (=1 g/l)    0.531,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    0.513,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.28, 24.78, 30.38]

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:112.566
Grand average of hydropathicity (GRAVY):0.75