Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5468
Number of amino acids:376
Molecular Weight:41540.89 Da
Theoretical pI:5.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)266.91%
Cysteine CYS (C)71.86%
Glutamic Acid GLU (E)328.51%
Aspartic Acid ASP (D)184.79%
Glycine GLY (G)369.57%
Phynylalanine PHE (F)133.46%
Isoleucine ILE (I)184.79%
Histidine HIS (H)51.33%
Lysine LYS (K)215.59%
Methionine MET (M)71.86%
Leucine LEU (L)338.78%
Asparagine ASN (N)205.32%
Glutamine GLN (Q)102.66%
Proline PRO (P)102.66%
Serine SER (S)318.24%
Arginine ARG (R)174.52%
Threonine THR (T)164.26%
Tryptophan TRP (W)82.13%
Valine VAL (V)338.78%
Tyrosine TYR (Y)153.99%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1844
HydrogenH2870
NitrogenN496
OxygenO569
SulphurS14

FormulaC1844H2870N496O569S14
Total Number of Atoms:5793


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    66725
Absorption 0.1% (=1 g/l)    1.606,   assuming all pairs of CYS residues form cystines

Ext. coefficient    66350
Absorption 0.1% (=1 g/l)    1.597,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.79

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.91, 25.80, 26.06]

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:85.266
Grand average of hydropathicity (GRAVY):-0.23