Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5874
Number of amino acids:71
Molecular Weight:7957.39 Da
Theoretical pI:6.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)79.86%
Cysteine CYS (C)811.27%
Glutamic Acid GLU (E)57.04%
Aspartic Acid ASP (D)11.41%
Glycine GLY (G)45.63%
Phynylalanine PHE (F)45.63%
Isoleucine ILE (I)45.63%
Histidine HIS (H)00%
Lysine LYS (K)68.45%
Methionine MET (M)34.23%
Leucine LEU (L)34.23%
Asparagine ASN (N)45.63%
Glutamine GLN (Q)34.23%
Proline PRO (P)22.82%
Serine SER (S)11.41%
Arginine ARG (R)00%
Threonine THR (T)57.04%
Tryptophan TRP (W)22.82%
Valine VAL (V)68.45%
Tyrosine TYR (Y)34.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC354
HydrogenH544
NitrogenN86
OxygenO100
SulphurS11

FormulaC354H544N86O100S11
Total Number of Atoms:1095


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    15970
Absorption 0.1% (=1 g/l)    2.007,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15470
Absorption 0.1% (=1 g/l)    1.944,   assuming all CYS residues are reduced
Aromaticity:0.127

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.99, 15.49, 25.35]

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:72.8169
Grand average of hydropathicity (GRAVY):0.29