Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4576
Number of amino acids:255
Molecular Weight:27114.72 Da
Theoretical pI:8.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3011.76%
Cysteine CYS (C)103.92%
Glutamic Acid GLU (E)51.96%
Aspartic Acid ASP (D)62.35%
Glycine GLY (G)3212.55%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)103.92%
Histidine HIS (H)10.39%
Lysine LYS (K)62.35%
Methionine MET (M)62.35%
Leucine LEU (L)155.88%
Asparagine ASN (N)145.49%
Glutamine GLN (Q)135.1%
Proline PRO (P)103.92%
Serine SER (S)187.06%
Arginine ARG (R)72.75%
Threonine THR (T)218.24%
Tryptophan TRP (W)114.31%
Valine VAL (V)187.06%
Tyrosine TYR (Y)103.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1215
HydrogenH1820
NitrogenN322
OxygenO354
SulphurS16

FormulaC1215H1820N322O354S16
Total Number of Atoms:3727


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    76025
Absorption 0.1% (=1 g/l)    2.804,   assuming all pairs of CYS residues form cystines

Ext. coefficient    75400
Absorption 0.1% (=1 g/l)    2.781,   assuming all CYS residues are reduced
Aromaticity:0.129

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.37

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.80, 29.02, 21.96]

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:70.4706
Grand average of hydropathicity (GRAVY):0.12