Physicochemical Properties of Peptide



PPepDB ID:PPepDB_648
Number of amino acids:44
Molecular Weight:4453.12 Da
Theoretical pI:9.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)715.91%
Cysteine CYS (C)12.27%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)12.27%
Glycine GLY (G)715.91%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)12.27%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)12.27%
Leucine LEU (L)36.82%
Asparagine ASN (N)24.55%
Glutamine GLN (Q)12.27%
Proline PRO (P)49.09%
Serine SER (S)12.27%
Arginine ARG (R)36.82%
Threonine THR (T)49.09%
Tryptophan TRP (W)24.55%
Valine VAL (V)511.36%
Tyrosine TYR (Y)12.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC197
HydrogenH312
NitrogenN58
OxygenO56
SulphurS2

FormulaC197H312N58O56S2
Total Number of Atoms:625


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

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    2.805,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    2.805,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.27, 31.82, 25.00]

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:84.3181
Grand average of hydropathicity (GRAVY):0.24