Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5816
Number of amino acids:252
Molecular Weight:25591.67 Da
Theoretical pI:7.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2911.51%
Cysteine CYS (C)31.19%
Glutamic Acid GLU (E)41.59%
Aspartic Acid ASP (D)62.38%
Glycine GLY (G)3011.9%
Phynylalanine PHE (F)124.76%
Isoleucine ILE (I)114.37%
Histidine HIS (H)31.19%
Lysine LYS (K)51.98%
Methionine MET (M)20.79%
Leucine LEU (L)218.33%
Asparagine ASN (N)176.75%
Glutamine GLN (Q)72.78%
Proline PRO (P)176.75%
Serine SER (S)3614.29%
Arginine ARG (R)62.38%
Threonine THR (T)145.56%
Tryptophan TRP (W)41.59%
Valine VAL (V)197.54%
Tyrosine TYR (Y)62.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1139
HydrogenH1761
NitrogenN309
OxygenO353
SulphurS5

FormulaC1139H1761N309O353S5
Total Number of Atoms:3567


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31065
Absorption 0.1% (=1 g/l)    1.214,   assuming all pairs of CYS residues form cystines

Ext. coefficient    30940
Absorption 0.1% (=1 g/l)    1.209,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.36

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.97, 39.68, 22.22]

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:82.8968
Grand average of hydropathicity (GRAVY):0.17