Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4094
Number of amino acids:212
Molecular Weight:21238.87 Da
Theoretical pI:7.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2411.32%
Cysteine CYS (C)3215.09%
Glutamic Acid GLU (E)62.83%
Aspartic Acid ASP (D)52.36%
Glycine GLY (G)4219.81%
Phynylalanine PHE (F)52.36%
Isoleucine ILE (I)31.42%
Histidine HIS (H)00%
Lysine LYS (K)83.77%
Methionine MET (M)52.36%
Leucine LEU (L)94.25%
Asparagine ASN (N)115.19%
Glutamine GLN (Q)146.6%
Proline PRO (P)52.36%
Serine SER (S)157.08%
Arginine ARG (R)52.36%
Threonine THR (T)94.25%
Tryptophan TRP (W)31.42%
Valine VAL (V)31.42%
Tyrosine TYR (Y)83.77%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC862
HydrogenH1333
NitrogenN263
OxygenO292
SulphurS37

FormulaC862H1333N263O292S37
Total Number of Atoms:2787


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30420
Absorption 0.1% (=1 g/l)    1.432,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.338,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.62, 34.43, 20.75]

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:37.5
Grand average of hydropathicity (GRAVY):-0.14