Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5437
Number of amino acids:133
Molecular Weight:14106.53 Da
Theoretical pI:8.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1511.28%
Cysteine CYS (C)86.02%
Glutamic Acid GLU (E)129.02%
Aspartic Acid ASP (D)21.5%
Glycine GLY (G)96.77%
Phynylalanine PHE (F)32.26%
Isoleucine ILE (I)96.77%
Histidine HIS (H)21.5%
Lysine LYS (K)1511.28%
Methionine MET (M)32.26%
Leucine LEU (L)75.26%
Asparagine ASN (N)10.75%
Glutamine GLN (Q)10.75%
Proline PRO (P)86.02%
Serine SER (S)118.27%
Arginine ARG (R)32.26%
Threonine THR (T)118.27%
Tryptophan TRP (W)10.75%
Valine VAL (V)107.52%
Tyrosine TYR (Y)21.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC618
HydrogenH1018
NitrogenN164
OxygenO188
SulphurS11

FormulaC618H1018N164O188S11
Total Number of Atoms:1999


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    0.637,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.601,   assuming all CYS residues are reduced
Aromaticity:0.045

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.82

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.06, 21.80, 27.82]

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:80
Grand average of hydropathicity (GRAVY):-0.01