Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6050
Number of amino acids:191
Molecular Weight:18416.07 Da
Theoretical pI:4.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2613.61%
Cysteine CYS (C)10.52%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)52.62%
Glycine GLY (G)52.62%
Phynylalanine PHE (F)31.57%
Isoleucine ILE (I)63.14%
Histidine HIS (H)00%
Lysine LYS (K)21.05%
Methionine MET (M)31.57%
Leucine LEU (L)52.62%
Asparagine ASN (N)31.57%
Glutamine GLN (Q)31.57%
Proline PRO (P)6634.56%
Serine SER (S)2613.61%
Arginine ARG (R)10.52%
Threonine THR (T)199.95%
Tryptophan TRP (W)10.52%
Valine VAL (V)168.38%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC839
HydrogenH1309
NitrogenN203
OxygenO253
SulphurS4

FormulaC839H1309N203O253S4
Total Number of Atoms:2608


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.299,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.299,   assuming all CYS residues are reduced
Aromaticity:0.021

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 113.18

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.23, 52.36, 17.80]

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:60.3665
Grand average of hydropathicity (GRAVY):-0.09