Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6021
Number of amino acids:134
Molecular Weight:13959.36 Da
Theoretical pI:7.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3727.61%
Cysteine CYS (C)10.75%
Glutamic Acid GLU (E)85.97%
Aspartic Acid ASP (D)96.72%
Glycine GLY (G)21.49%
Phynylalanine PHE (F)42.99%
Isoleucine ILE (I)42.99%
Histidine HIS (H)00%
Lysine LYS (K)1511.19%
Methionine MET (M)53.73%
Leucine LEU (L)118.21%
Asparagine ASN (N)21.49%
Glutamine GLN (Q)42.99%
Proline PRO (P)42.99%
Serine SER (S)64.48%
Arginine ARG (R)32.24%
Threonine THR (T)32.24%
Tryptophan TRP (W)10.75%
Valine VAL (V)1410.45%
Tyrosine TYR (Y)10.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC621
HydrogenH1029
NitrogenN165
OxygenO185
SulphurS6

FormulaC621H1029N165O185S6
Total Number of Atoms:2006


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.501,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.501,   assuming all CYS residues are reduced
Aromaticity:0.045

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.72

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.12, 10.45, 45.52]

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:101.567
Grand average of hydropathicity (GRAVY):0.30