Physicochemical Properties of Peptide



PPepDB ID:PPepDB_972
Number of amino acids:245
Molecular Weight:26186.1 Da
Theoretical pI:9.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)218.57%
Cysteine CYS (C)166.53%
Glutamic Acid GLU (E)31.22%
Aspartic Acid ASP (D)93.67%
Glycine GLY (G)2610.61%
Phynylalanine PHE (F)104.08%
Isoleucine ILE (I)83.27%
Histidine HIS (H)41.63%
Lysine LYS (K)114.49%
Methionine MET (M)41.63%
Leucine LEU (L)218.57%
Asparagine ASN (N)72.86%
Glutamine GLN (Q)72.86%
Proline PRO (P)156.12%
Serine SER (S)2510.2%
Arginine ARG (R)135.31%
Threonine THR (T)166.53%
Tryptophan TRP (W)31.22%
Valine VAL (V)145.71%
Tyrosine TYR (Y)124.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1154
HydrogenH1796
NitrogenN320
OxygenO337
SulphurS20

FormulaC1154H1796N320O337S20
Total Number of Atoms:3627


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    35380
Absorption 0.1% (=1 g/l)    1.351,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34380
Absorption 0.1% (=1 g/l)    1.313,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.83

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.76, 29.80, 20.00]

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:71.3062
Grand average of hydropathicity (GRAVY):-0.00