Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5975
Number of amino acids:185
Molecular Weight:20747.09 Da
Theoretical pI:9.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)158.11%
Cysteine CYS (C)21.08%
Glutamic Acid GLU (E)126.49%
Aspartic Acid ASP (D)63.24%
Glycine GLY (G)137.03%
Phynylalanine PHE (F)94.86%
Isoleucine ILE (I)168.65%
Histidine HIS (H)21.08%
Lysine LYS (K)115.95%
Methionine MET (M)31.62%
Leucine LEU (L)2111.35%
Asparagine ASN (N)52.7%
Glutamine GLN (Q)63.24%
Proline PRO (P)105.41%
Serine SER (S)158.11%
Arginine ARG (R)115.95%
Threonine THR (T)105.41%
Tryptophan TRP (W)52.7%
Valine VAL (V)84.32%
Tyrosine TYR (Y)52.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC948
HydrogenH1493
NitrogenN249
OxygenO263
SulphurS5

FormulaC948H1493N249O263S5
Total Number of Atoms:2958


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    35075
Absorption 0.1% (=1 g/l)    1.691,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34950
Absorption 0.1% (=1 g/l)    1.685,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.61

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.59, 23.24, 27.57]

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:98.6488
Grand average of hydropathicity (GRAVY):-0.02