Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2467
Number of amino acids:36
Molecular Weight:3666.97 Da
Theoretical pI:3.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.56%
Cysteine CYS (C)822.22%
Glutamic Acid GLU (E)12.78%
Aspartic Acid ASP (D)411.11%
Glycine GLY (G)822.22%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.78%
Asparagine ASN (N)12.78%
Glutamine GLN (Q)25.56%
Proline PRO (P)25.56%
Serine SER (S)12.78%
Arginine ARG (R)12.78%
Threonine THR (T)25.56%
Tryptophan TRP (W)12.78%
Valine VAL (V)00%
Tyrosine TYR (Y)25.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC143
HydrogenH209
NitrogenN43
OxygenO55
SulphurS8

FormulaC143H209N43O55S8
Total Number of Atoms:458


Total number of positively charged residues (ARG + LYS):1
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    8980
Absorption 0.1% (=1 g/l)    2.449,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    2.313,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 19.66

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[11.11, 33.33, 11.11]

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:16.3889
Grand average of hydropathicity (GRAVY):-0.48