Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5984
Number of amino acids:150
Molecular Weight:16869.29 Da
Theoretical pI:8.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1912.67%
Cysteine CYS (C)10.67%
Glutamic Acid GLU (E)10.67%
Aspartic Acid ASP (D)42.67%
Glycine GLY (G)74.67%
Phynylalanine PHE (F)96%
Isoleucine ILE (I)96%
Histidine HIS (H)10.67%
Lysine LYS (K)10.67%
Methionine MET (M)10.67%
Leucine LEU (L)1912.67%
Asparagine ASN (N)64%
Glutamine GLN (Q)2617.33%
Proline PRO (P)64%
Serine SER (S)106.67%
Arginine ARG (R)64%
Threonine THR (T)32%
Tryptophan TRP (W)10.67%
Valine VAL (V)106.67%
Tyrosine TYR (Y)106.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC774
HydrogenH1186
NitrogenN204
OxygenO216
SulphurS2

FormulaC774H1186N204O216S2
Total Number of Atoms:2382


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20400
Absorption 0.1% (=1 g/l)    1.209,   assuming all pairs of CYS residues form cystines

Ext. coefficient    20400
Absorption 0.1% (=1 g/l)    1.209,   assuming all CYS residues are reduced
Aromaticity:0.133

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 67.78

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[38.67, 19.33, 26.67]

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:104.8
Grand average of hydropathicity (GRAVY):0.12