Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5985
Number of amino acids:240
Molecular Weight:26633.02 Da
Theoretical pI:9.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3313.75%
Cysteine CYS (C)10.42%
Glutamic Acid GLU (E)10.42%
Aspartic Acid ASP (D)20.83%
Glycine GLY (G)41.67%
Phynylalanine PHE (F)145.83%
Isoleucine ILE (I)125%
Histidine HIS (H)10.42%
Lysine LYS (K)10.42%
Methionine MET (M)10.42%
Leucine LEU (L)4418.33%
Asparagine ASN (N)135.42%
Glutamine GLN (Q)4719.58%
Proline PRO (P)187.5%
Serine SER (S)93.75%
Arginine ARG (R)52.08%
Threonine THR (T)104.17%
Tryptophan TRP (W)00%
Valine VAL (V)156.25%
Tyrosine TYR (Y)93.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1232
HydrogenH1942
NitrogenN318
OxygenO335
SulphurS2

FormulaC1232H1942N318O335S2
Total Number of Atoms:3829


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13410
Absorption 0.1% (=1 g/l)    0.504,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13410
Absorption 0.1% (=1 g/l)    0.504,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 78.52

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[39.17, 18.33, 32.92]

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:122.875
Grand average of hydropathicity (GRAVY):0.34