Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4828
Number of amino acids:265
Molecular Weight:29254.75 Da
Theoretical pI:6.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)186.79%
Cysteine CYS (C)20.75%
Glutamic Acid GLU (E)176.42%
Aspartic Acid ASP (D)124.53%
Glycine GLY (G)134.91%
Phynylalanine PHE (F)155.66%
Isoleucine ILE (I)145.28%
Histidine HIS (H)62.26%
Lysine LYS (K)155.66%
Methionine MET (M)20.75%
Leucine LEU (L)269.81%
Asparagine ASN (N)2710.19%
Glutamine GLN (Q)20.75%
Proline PRO (P)72.64%
Serine SER (S)3111.7%
Arginine ARG (R)114.15%
Threonine THR (T)207.55%
Tryptophan TRP (W)20.75%
Valine VAL (V)197.17%
Tyrosine TYR (Y)62.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1293
HydrogenH2034
NitrogenN356
OxygenO410
SulphurS4

FormulaC1293H2034N356O410S4
Total Number of Atoms:4097


Total number of positively charged residues (ARG + LYS):26
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    20065
Absorption 0.1% (=1 g/l)    0.686,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19940
Absorption 0.1% (=1 g/l)    0.682,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.31

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.94, 29.43, 23.77]

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:86.4528
Grand average of hydropathicity (GRAVY):-0.27