Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3363
Number of amino acids:29
Molecular Weight:3167.6 Da
Theoretical pI:8.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.45%
Cysteine CYS (C)413.79%
Glutamic Acid GLU (E)26.9%
Aspartic Acid ASP (D)00%
Glycine GLY (G)310.34%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)13.45%
Histidine HIS (H)00%
Lysine LYS (K)310.34%
Methionine MET (M)00%
Leucine LEU (L)26.9%
Asparagine ASN (N)517.24%
Glutamine GLN (Q)13.45%
Proline PRO (P)13.45%
Serine SER (S)26.9%
Arginine ARG (R)13.45%
Threonine THR (T)13.45%
Tryptophan TRP (W)13.45%
Valine VAL (V)13.45%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC129
HydrogenH212
NitrogenN42
OxygenO43
SulphurS4

FormulaC129H212N42O43S4
Total Number of Atoms:430


Total number of positively charged residues (ARG + LYS):4
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    5750
Absorption 0.1% (=1 g/l)    1.815,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.736,   assuming all CYS residues are reduced
Aromaticity:0.034

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 18.92

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.24, 37.93, 17.24]

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:53.7931
Grand average of hydropathicity (GRAVY):-0.76