Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4978
Number of amino acids:374
Molecular Weight:41192.64 Da
Theoretical pI:4.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3810.16%
Cysteine CYS (C)10.27%
Glutamic Acid GLU (E)215.61%
Aspartic Acid ASP (D)236.15%
Glycine GLY (G)225.88%
Phynylalanine PHE (F)195.08%
Isoleucine ILE (I)184.81%
Histidine HIS (H)51.34%
Lysine LYS (K)225.88%
Methionine MET (M)112.94%
Leucine LEU (L)3910.43%
Asparagine ASN (N)215.61%
Glutamine GLN (Q)133.48%
Proline PRO (P)154.01%
Serine SER (S)277.22%
Arginine ARG (R)92.41%
Threonine THR (T)318.29%
Tryptophan TRP (W)30.8%
Valine VAL (V)205.35%
Tyrosine TYR (Y)164.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1848
HydrogenH2870
NitrogenN470
OxygenO571
SulphurS12

FormulaC1848H2870N470O571S12
Total Number of Atoms:5771


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40340
Absorption 0.1% (=1 g/l)    0.979,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40340
Absorption 0.1% (=1 g/l)    0.979,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.38

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.75, 22.73, 29.14]

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:85.1069
Grand average of hydropathicity (GRAVY):-0.15