Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4440
Number of amino acids:278
Molecular Weight:29528.92 Da
Theoretical pI:8.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3412.23%
Cysteine CYS (C)103.6%
Glutamic Acid GLU (E)93.24%
Aspartic Acid ASP (D)145.04%
Glycine GLY (G)3111.15%
Phynylalanine PHE (F)124.32%
Isoleucine ILE (I)72.52%
Histidine HIS (H)41.44%
Lysine LYS (K)124.32%
Methionine MET (M)62.16%
Leucine LEU (L)279.71%
Asparagine ASN (N)62.16%
Glutamine GLN (Q)51.8%
Proline PRO (P)103.6%
Serine SER (S)238.27%
Arginine ARG (R)176.12%
Threonine THR (T)155.4%
Tryptophan TRP (W)72.52%
Valine VAL (V)238.27%
Tyrosine TYR (Y)62.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1309
HydrogenH2057
NitrogenN367
OxygenO380
SulphurS16

FormulaC1309H2057N367O380S16
Total Number of Atoms:4129


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48065
Absorption 0.1% (=1 g/l)    1.628,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47440
Absorption 0.1% (=1 g/l)    1.607,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.50, 25.18, 27.34]

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:83.9209
Grand average of hydropathicity (GRAVY):0.13