Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2468
Number of amino acids:36
Molecular Weight:3598.89 Da
Theoretical pI:3.42


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.56%
Cysteine CYS (C)822.22%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)38.33%
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)00%
Glutamine GLN (Q)38.33%
Proline PRO (P)12.78%
Serine SER (S)38.33%
Arginine ARG (R)00%
Threonine THR (T)38.33%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)411.11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC141
HydrogenH205
NitrogenN39
OxygenO56
SulphurS8

FormulaC141H205N39O56S8
Total Number of Atoms:449


Total number of positively charged residues (ARG + LYS):0
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6460
Absorption 0.1% (=1 g/l)    1.795,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    1.656,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : -0.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.89, 33.33, 8.33]

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):-0.23