Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5827
Number of amino acids:107
Molecular Weight:12145.17 Da
Theoretical pI:5.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)54.67%
Cysteine CYS (C)21.87%
Glutamic Acid GLU (E)109.35%
Aspartic Acid ASP (D)43.74%
Glycine GLY (G)65.61%
Phynylalanine PHE (F)65.61%
Isoleucine ILE (I)109.35%
Histidine HIS (H)10.93%
Lysine LYS (K)76.54%
Methionine MET (M)21.87%
Leucine LEU (L)1211.22%
Asparagine ASN (N)65.61%
Glutamine GLN (Q)43.74%
Proline PRO (P)54.67%
Serine SER (S)54.67%
Arginine ARG (R)65.61%
Threonine THR (T)54.67%
Tryptophan TRP (W)10.93%
Valine VAL (V)98.41%
Tyrosine TYR (Y)10.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC548
HydrogenH885
NitrogenN145
OxygenO157
SulphurS4

FormulaC548H885N145O157S4
Total Number of Atoms:1739


Total number of positively charged residues (ARG + LYS):13
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    7115
Absorption 0.1% (=1 g/l)    0.586,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.576,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.03

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.45, 20.56, 27.10]

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:109.252
Grand average of hydropathicity (GRAVY):0.01