Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2472
Number of amino acids:32
Molecular Weight:3565.15 Da
Theoretical pI:8.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)26.25%
Cysteine CYS (C)618.75%
Glutamic Acid GLU (E)26.25%
Aspartic Acid ASP (D)00%
Glycine GLY (G)412.5%
Phynylalanine PHE (F)39.38%
Isoleucine ILE (I)26.25%
Histidine HIS (H)00%
Lysine LYS (K)26.25%
Methionine MET (M)00%
Leucine LEU (L)13.13%
Asparagine ASN (N)26.25%
Glutamine GLN (Q)00%
Proline PRO (P)13.13%
Serine SER (S)26.25%
Arginine ARG (R)26.25%
Threonine THR (T)13.13%
Tryptophan TRP (W)13.13%
Valine VAL (V)00%
Tyrosine TYR (Y)13.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC154
HydrogenH231
NitrogenN43
OxygenO43
SulphurS6

FormulaC154H231N43O43S6
Total Number of Atoms:477


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    7365
Absorption 0.1% (=1 g/l)    2.066,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.961,   assuming all CYS residues are reduced
Aromaticity:0.156

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 1.32

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 28.12, 15.62]

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:42.8125
Grand average of hydropathicity (GRAVY):0.04