Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4827
Number of amino acids:265
Molecular Weight:29274.7 Da
Theoretical pI:5.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)197.17%
Cysteine CYS (C)20.75%
Glutamic Acid GLU (E)186.79%
Aspartic Acid ASP (D)114.15%
Glycine GLY (G)134.91%
Phynylalanine PHE (F)155.66%
Isoleucine ILE (I)134.91%
Histidine HIS (H)62.26%
Lysine LYS (K)145.28%
Methionine MET (M)20.75%
Leucine LEU (L)269.81%
Asparagine ASN (N)2810.57%
Glutamine GLN (Q)20.75%
Proline PRO (P)72.64%
Serine SER (S)3111.7%
Arginine ARG (R)114.15%
Threonine THR (T)197.17%
Tryptophan TRP (W)20.75%
Valine VAL (V)197.17%
Tyrosine TYR (Y)72.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1294
HydrogenH2026
NitrogenN356
OxygenO411
SulphurS4

FormulaC1294H2026N356O411S4
Total Number of Atoms:4091


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):29
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21555
Absorption 0.1% (=1 g/l)    0.736,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21430
Absorption 0.1% (=1 g/l)    0.732,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.21

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.94, 29.81, 24.53]

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:85.3585
Grand average of hydropathicity (GRAVY):-0.28