Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5576
Number of amino acids:225
Molecular Weight:23719.6 Da
Theoretical pI:4.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3013.33%
Cysteine CYS (C)167.11%
Glutamic Acid GLU (E)41.78%
Aspartic Acid ASP (D)156.67%
Glycine GLY (G)208.89%
Phynylalanine PHE (F)94%
Isoleucine ILE (I)73.11%
Histidine HIS (H)10.44%
Lysine LYS (K)104.44%
Methionine MET (M)20.89%
Leucine LEU (L)135.78%
Asparagine ASN (N)125.33%
Glutamine GLN (Q)125.33%
Proline PRO (P)94%
Serine SER (S)156.67%
Arginine ARG (R)52.22%
Threonine THR (T)188%
Tryptophan TRP (W)31.33%
Valine VAL (V)146.22%
Tyrosine TYR (Y)104.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1028
HydrogenH1579
NitrogenN279
OxygenO331
SulphurS18

FormulaC1028H1579N279O331S18
Total Number of Atoms:3235


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32400
Absorption 0.1% (=1 g/l)    1.366,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.324,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.50

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.89, 24.89, 21.78]

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:66.0444
Grand average of hydropathicity (GRAVY):-0.07