Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2698
Number of amino acids:35
Molecular Weight:4013.68 Da
Theoretical pI:7.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.71%
Cysteine CYS (C)25.71%
Glutamic Acid GLU (E)25.71%
Aspartic Acid ASP (D)00%
Glycine GLY (G)12.86%
Phynylalanine PHE (F)12.86%
Isoleucine ILE (I)00%
Histidine HIS (H)38.57%
Lysine LYS (K)25.71%
Methionine MET (M)25.71%
Leucine LEU (L)617.14%
Asparagine ASN (N)25.71%
Glutamine GLN (Q)25.71%
Proline PRO (P)00%
Serine SER (S)411.43%
Arginine ARG (R)12.86%
Threonine THR (T)25.71%
Tryptophan TRP (W)12.86%
Valine VAL (V)25.71%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC174
HydrogenH279
NitrogenN51
OxygenO50
SulphurS4

FormulaC174H279N51O50S4
Total Number of Atoms:558


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5625
Absorption 0.1% (=1 g/l)    1.401,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.370,   assuming all CYS residues are reduced
Aromaticity:0.057

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 19.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.57, 20.00, 34.29]

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:89.143
Grand average of hydropathicity (GRAVY):-0.07