Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1148
Number of amino acids:121
Molecular Weight:12391.15 Da
Theoretical pI:5.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1613.22%
Cysteine CYS (C)129.92%
Glutamic Acid GLU (E)54.13%
Aspartic Acid ASP (D)54.13%
Glycine GLY (G)86.61%
Phynylalanine PHE (F)21.65%
Isoleucine ILE (I)54.13%
Histidine HIS (H)00%
Lysine LYS (K)64.96%
Methionine MET (M)10.83%
Leucine LEU (L)108.26%
Asparagine ASN (N)64.96%
Glutamine GLN (Q)43.31%
Proline PRO (P)32.48%
Serine SER (S)1411.57%
Arginine ARG (R)32.48%
Threonine THR (T)108.26%
Tryptophan TRP (W)10.83%
Valine VAL (V)97.44%
Tyrosine TYR (Y)10.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC518
HydrogenH855
NitrogenN147
OxygenO177
SulphurS13

FormulaC518H855N147O177S13
Total Number of Atoms:1710


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7740
Absorption 0.1% (=1 g/l)    0.625,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.564,   assuming all CYS residues are reduced
Aromaticity:0.033

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.14, 25.62, 26.45]

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:83.1404
Grand average of hydropathicity (GRAVY):0.24