Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1130
Number of amino acids:120
Molecular Weight:12828.09 Da
Theoretical pI:8.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1411.67%
Cysteine CYS (C)65%
Glutamic Acid GLU (E)75.83%
Aspartic Acid ASP (D)43.33%
Glycine GLY (G)65%
Phynylalanine PHE (F)32.5%
Isoleucine ILE (I)75.83%
Histidine HIS (H)00%
Lysine LYS (K)108.33%
Methionine MET (M)21.67%
Leucine LEU (L)1613.33%
Asparagine ASN (N)65%
Glutamine GLN (Q)32.5%
Proline PRO (P)65%
Serine SER (S)108.33%
Arginine ARG (R)32.5%
Threonine THR (T)54.17%
Tryptophan TRP (W)10.83%
Valine VAL (V)97.5%
Tyrosine TYR (Y)21.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC569
HydrogenH939
NitrogenN149
OxygenO169
SulphurS8

FormulaC569H939N149O169S8
Total Number of Atoms:1834


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    8855
Absorption 0.1% (=1 g/l)    0.690,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.661,   assuming all CYS residues are reduced
Aromaticity:0.050

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.63

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.67, 23.33, 32.50]

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:108.167
Grand average of hydropathicity (GRAVY):0.28