Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5647
Number of amino acids:220
Molecular Weight:24375.22 Da
Theoretical pI:8.37


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)62.73%
Cysteine CYS (C)94.09%
Glutamic Acid GLU (E)62.73%
Aspartic Acid ASP (D)115%
Glycine GLY (G)167.27%
Phynylalanine PHE (F)135.91%
Isoleucine ILE (I)135.91%
Histidine HIS (H)20.91%
Lysine LYS (K)115%
Methionine MET (M)31.36%
Leucine LEU (L)2712.27%
Asparagine ASN (N)177.73%
Glutamine GLN (Q)62.73%
Proline PRO (P)177.73%
Serine SER (S)198.64%
Arginine ARG (R)94.09%
Threonine THR (T)104.55%
Tryptophan TRP (W)20.91%
Valine VAL (V)167.27%
Tyrosine TYR (Y)73.18%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1100
HydrogenH1721
NitrogenN287
OxygenO314
SulphurS12

FormulaC1100H1721N287O314S12
Total Number of Atoms:3434


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21930
Absorption 0.1% (=1 g/l)    0.900,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21430
Absorption 0.1% (=1 g/l)    0.879,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.45, 31.36, 19.09]

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:94.7272
Grand average of hydropathicity (GRAVY):0.03