Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5439
Number of amino acids:465
Molecular Weight:51376.91 Da
Theoretical pI:7.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)316.67%
Cysteine CYS (C)51.08%
Glutamic Acid GLU (E)224.73%
Aspartic Acid ASP (D)132.8%
Glycine GLY (G)469.89%
Phynylalanine PHE (F)265.59%
Isoleucine ILE (I)214.52%
Histidine HIS (H)91.94%
Lysine LYS (K)153.23%
Methionine MET (M)81.72%
Leucine LEU (L)449.46%
Asparagine ASN (N)357.53%
Glutamine GLN (Q)5311.4%
Proline PRO (P)265.59%
Serine SER (S)255.38%
Arginine ARG (R)214.52%
Threonine THR (T)234.95%
Tryptophan TRP (W)61.29%
Valine VAL (V)286.02%
Tyrosine TYR (Y)81.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2276
HydrogenH3541
NitrogenN655
OxygenO680
SulphurS13

FormulaC2276H3541N655O680S13
Total Number of Atoms:7165


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):35
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45170
Absorption 0.1% (=1 g/l)    0.879,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44920
Absorption 0.1% (=1 g/l)    0.874,   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 : 46.87

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.60, 28.39, 22.58]

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:78.6452
Grand average of hydropathicity (GRAVY):-0.41